[hotfix] [gelly] Indent Java with tabs not spaces

This PR also applies IntelliJ's "reformat code" using the unofficial
Flink-style configuration.


Project: http://git-wip-us.apache.org/repos/asf/flink/repo
Commit: http://git-wip-us.apache.org/repos/asf/flink/commit/cb282067
Tree: http://git-wip-us.apache.org/repos/asf/flink/tree/cb282067
Diff: http://git-wip-us.apache.org/repos/asf/flink/diff/cb282067

Branch: refs/heads/master
Commit: cb282067517ed721858e5c898abbbf59a2fbafef
Parents: 53716a4
Author: Greg Hogan <[email protected]>
Authored: Tue Jan 17 15:01:17 2017 -0500
Committer: Greg Hogan <[email protected]>
Committed: Tue Jan 17 15:38:25 2017 -0500

----------------------------------------------------------------------
 .../graph/library/CommunityDetectionITCase.java |  14 +-
 .../graph/library/LabelPropagationITCase.java   |  16 +-
 .../flink/graph/library/PageRankITCase.java     |  50 +-
 .../flink/graph/test/GatherSumApplyITCase.java  |  32 +-
 .../SingleSourceShortestPathsITCase.java        |  94 +--
 .../test/GatherSumApplyConfigurationITCase.java |  90 ++-
 .../test/ScatterGatherConfigurationITCase.java  | 262 ++++----
 .../graph/test/operations/DegreesITCase.java    | 201 ++++---
 .../test/operations/FromCollectionITCase.java   | 109 ++--
 .../test/operations/GraphCreationITCase.java    | 143 ++---
 .../GraphCreationWithMapperITCase.java          |  85 ++-
 .../test/operations/GraphOperationsITCase.java  | 235 ++++----
 .../test/operations/JoinWithEdgesITCase.java    | 593 +++++++++----------
 .../test/operations/JoinWithVerticesITCase.java | 185 +++---
 .../graph/test/operations/MapEdgesITCase.java   | 118 ++--
 .../test/operations/MapVerticesITCase.java      |  91 ++-
 .../operations/ReduceOnEdgesMethodsITCase.java  | 345 +++++------
 .../ReduceOnNeighborMethodsITCase.java          | 388 ++++++------
 18 files changed, 1511 insertions(+), 1540 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/flink/blob/cb282067/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/CommunityDetectionITCase.java
----------------------------------------------------------------------
diff --git 
a/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/CommunityDetectionITCase.java
 
b/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/CommunityDetectionITCase.java
index cd8af9b..c37d1ed 100644
--- 
a/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/CommunityDetectionITCase.java
+++ 
b/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/CommunityDetectionITCase.java
@@ -47,10 +47,10 @@ public class CommunityDetectionITCase extends 
MultipleProgramsTestBase {
 
                ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
                Graph<Long, Long, Double> inputGraph = Graph.fromDataSet(
-                               
CommunityDetectionData.getSimpleEdgeDataSet(env), new InitLabels(), env);
+                       CommunityDetectionData.getSimpleEdgeDataSet(env), new 
InitLabels(), env);
 
-        List<Vertex<Long, Long>> result = inputGraph.run(new 
CommunityDetection<Long>(1, CommunityDetectionData.DELTA))
-                       .getVertices().collect();
+               List<Vertex<Long, Long>> result = inputGraph.run(new 
CommunityDetection<Long>(1, CommunityDetectionData.DELTA))
+                       .getVertices().collect();
 
                expected = CommunityDetectionData.COMMUNITIES_SINGLE_ITERATION;
                compareResultAsTuples(result, expected);
@@ -63,16 +63,16 @@ public class CommunityDetectionITCase extends 
MultipleProgramsTestBase {
                 */
                ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
                Graph<Long, Long, Double> inputGraph = Graph.fromDataSet(
-                               CommunityDetectionData.getTieEdgeDataSet(env), 
new InitLabels(), env);
+                       CommunityDetectionData.getTieEdgeDataSet(env), new 
InitLabels(), env);
 
-        List<Vertex<Long, Long>> result = inputGraph.run(new 
CommunityDetection<Long>(1, CommunityDetectionData.DELTA))
-                       .getVertices().collect();
+               List<Vertex<Long, Long>> result = inputGraph.run(new 
CommunityDetection<Long>(1, CommunityDetectionData.DELTA))
+                       .getVertices().collect();
                expected = CommunityDetectionData.COMMUNITIES_WITH_TIE;
                compareResultAsTuples(result, expected);
        }
 
        @SuppressWarnings("serial")
-       private static final class InitLabels implements MapFunction<Long, 
Long>{
+       private static final class InitLabels implements MapFunction<Long, 
Long> {
 
                public Long map(Long id) {
                        return id;

http://git-wip-us.apache.org/repos/asf/flink/blob/cb282067/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/LabelPropagationITCase.java
----------------------------------------------------------------------
diff --git 
a/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/LabelPropagationITCase.java
 
b/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/LabelPropagationITCase.java
index 8b9234b..e6ba794 100644
--- 
a/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/LabelPropagationITCase.java
+++ 
b/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/LabelPropagationITCase.java
@@ -33,11 +33,11 @@ import java.util.List;
 @RunWith(Parameterized.class)
 public class LabelPropagationITCase extends MultipleProgramsTestBase {
 
-       public LabelPropagationITCase(TestExecutionMode mode){
+       public LabelPropagationITCase(TestExecutionMode mode) {
                super(mode);
        }
 
-    private String expectedResult;
+       private String expectedResult;
 
        @Test
        public void testSingleIteration() throws Exception {
@@ -47,10 +47,10 @@ public class LabelPropagationITCase extends 
MultipleProgramsTestBase {
                ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Long, NullValue> inputGraph = Graph.fromDataSet(
-                               LabelPropagationData.getDefaultVertexSet(env),
-                               
LabelPropagationData.getDefaultEdgeDataSet(env), env);
+                       LabelPropagationData.getDefaultVertexSet(env),
+                       LabelPropagationData.getDefaultEdgeDataSet(env), env);
 
-        List<Vertex<Long, Long>> result = inputGraph
+               List<Vertex<Long, Long>> result = inputGraph
                        .run(new LabelPropagation<Long, Long, NullValue>(1))
                        .collect();
 
@@ -66,10 +66,10 @@ public class LabelPropagationITCase extends 
MultipleProgramsTestBase {
                ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Long, NullValue> inputGraph = Graph.fromDataSet(
-                               LabelPropagationData.getTieVertexSet(env),
-                               LabelPropagationData.getTieEdgeDataSet(env), 
env);
+                       LabelPropagationData.getTieVertexSet(env),
+                       LabelPropagationData.getTieEdgeDataSet(env), env);
 
-        List<Vertex<Long, Long>> result = inputGraph
+               List<Vertex<Long, Long>> result = inputGraph
                        .run(new LabelPropagation<Long, Long, NullValue>(1))
                        .collect();
 

http://git-wip-us.apache.org/repos/asf/flink/blob/cb282067/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/PageRankITCase.java
----------------------------------------------------------------------
diff --git 
a/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/PageRankITCase.java
 
b/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/PageRankITCase.java
index e3e8f08..25a3e3f 100644
--- 
a/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/PageRankITCase.java
+++ 
b/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/library/PageRankITCase.java
@@ -35,7 +35,7 @@ import java.util.List;
 @RunWith(Parameterized.class)
 public class PageRankITCase extends MultipleProgramsTestBase {
 
-       public PageRankITCase(TestExecutionMode mode){
+       public PageRankITCase(TestExecutionMode mode) {
                super(mode);
        }
 
@@ -44,12 +44,12 @@ public class PageRankITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Double, Double> inputGraph = Graph.fromDataSet(
-                               PageRankData.getDefaultEdgeDataSet(env), new 
InitMapper(), env);
+                       PageRankData.getDefaultEdgeDataSet(env), new 
InitMapper(), env);
 
-        List<Vertex<Long, Double>> result = inputGraph.run(new 
PageRank<Long>(0.85, 3))
-                       .collect();
-        
-        compareWithDelta(result, 0.01);
+               List<Vertex<Long, Double>> result = inputGraph.run(new 
PageRank<Long>(0.85, 3))
+                       .collect();
+
+               compareWithDelta(result, 0.01);
        }
 
        @Test
@@ -57,12 +57,12 @@ public class PageRankITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Double, Double> inputGraph = Graph.fromDataSet(
-                               PageRankData.getDefaultEdgeDataSet(env), new 
InitMapper(), env);
+                       PageRankData.getDefaultEdgeDataSet(env), new 
InitMapper(), env);
+
+               List<Vertex<Long, Double>> result = inputGraph.run(new 
GSAPageRank<Long>(0.85, 3))
+                       .collect();
 
-        List<Vertex<Long, Double>> result = inputGraph.run(new 
GSAPageRank<Long>(0.85, 3))
-                       .collect();
-        
-        compareWithDelta(result, 0.01);
+               compareWithDelta(result, 0.01);
        }
 
        @Test
@@ -70,12 +70,12 @@ public class PageRankITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Double, Double> inputGraph = Graph.fromDataSet(
-                               PageRankData.getDefaultEdgeDataSet(env), new 
InitMapper(), env);
+                       PageRankData.getDefaultEdgeDataSet(env), new 
InitMapper(), env);
 
-        List<Vertex<Long, Double>> result = inputGraph.run(new 
PageRank<Long>(0.85, 3))
-                       .collect();
+               List<Vertex<Long, Double>> result = inputGraph.run(new 
PageRank<Long>(0.85, 3))
+                       .collect();
 
-        compareWithDelta(result, 0.01);
+               compareWithDelta(result, 0.01);
        }
 
        @Test
@@ -83,20 +83,20 @@ public class PageRankITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Double, Double> inputGraph = Graph.fromDataSet(
-                               PageRankData.getDefaultEdgeDataSet(env), new 
InitMapper(), env);
+                       PageRankData.getDefaultEdgeDataSet(env), new 
InitMapper(), env);
 
-        List<Vertex<Long, Double>> result = inputGraph.run(new 
GSAPageRank<Long>(0.85, 3))
-                       .collect();
-        
-        compareWithDelta(result, 0.01);
+               List<Vertex<Long, Double>> result = inputGraph.run(new 
GSAPageRank<Long>(0.85, 3))
+                       .collect();
+
+               compareWithDelta(result, 0.01);
        }
 
        private void compareWithDelta(List<Vertex<Long, Double>> result, double 
delta) {
 
                String resultString = "";
-        for (Vertex<Long, Double> v : result) {
-               resultString += v.f0.toString() + "," + v.f1.toString() +"\n";
-        }
+               for (Vertex<Long, Double> v : result) {
+                       resultString += v.f0.toString() + "," + v.f1.toString() 
+ "\n";
+               }
 
                String expectedResult = PageRankData.RANKS_AFTER_3_ITERATIONS;
                String[] expected = expectedResult.isEmpty() ? new String[0] : 
expectedResult.split("\n");
@@ -104,7 +104,7 @@ public class PageRankITCase extends 
MultipleProgramsTestBase {
                String[] resultArray = resultString.isEmpty() ? new String[0] : 
resultString.split("\n");
 
                Arrays.sort(expected);
-        Arrays.sort(resultArray);
+               Arrays.sort(resultArray);
 
                for (int i = 0; i < expected.length; i++) {
                        String[] expectedFields = expected[i].split(",");
@@ -114,7 +114,7 @@ public class PageRankITCase extends 
MultipleProgramsTestBase {
                        double resultPayLoad = 
Double.parseDouble(resultFields[1]);
 
                        Assert.assertTrue("Values differ by more than the 
permissible delta",
-                                       Math.abs(expectedPayLoad - 
resultPayLoad) < delta);
+                               Math.abs(expectedPayLoad - resultPayLoad) < 
delta);
                }
        }
 

http://git-wip-us.apache.org/repos/asf/flink/blob/cb282067/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/test/GatherSumApplyITCase.java
----------------------------------------------------------------------
diff --git 
a/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/test/GatherSumApplyITCase.java
 
b/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/test/GatherSumApplyITCase.java
index cf960b4..5ce2e28 100644
--- 
a/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/test/GatherSumApplyITCase.java
+++ 
b/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/test/GatherSumApplyITCase.java
@@ -37,7 +37,7 @@ import java.util.List;
 @RunWith(Parameterized.class)
 public class GatherSumApplyITCase extends MultipleProgramsTestBase {
 
-       public GatherSumApplyITCase(TestExecutionMode mode){
+       public GatherSumApplyITCase(TestExecutionMode mode) {
                super(mode);
        }
 
@@ -52,16 +52,16 @@ public class GatherSumApplyITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Long, NullValue> inputGraph = Graph.fromDataSet(
-                               
ConnectedComponentsDefaultData.getDefaultEdgeDataSet(env),
-                               new InitMapperCC(), env);
+                       
ConnectedComponentsDefaultData.getDefaultEdgeDataSet(env),
+                       new InitMapperCC(), env);
 
-        List<Vertex<Long, Long>> result = inputGraph.run(
-                       new GSAConnectedComponents<Long, Long, 
NullValue>(16)).collect();
+               List<Vertex<Long, Long>> result = inputGraph.run(
+                       new GSAConnectedComponents<Long, Long, 
NullValue>(16)).collect();
 
                expectedResult = "1,1\n" +
-                               "2,1\n" +
-                               "3,1\n" +
-                               "4,1\n";
+                       "2,1\n" +
+                       "3,1\n" +
+                       "4,1\n";
 
                compareResultAsTuples(result, expectedResult);
        }
@@ -75,17 +75,17 @@ public class GatherSumApplyITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, NullValue, Double> inputGraph = Graph.fromDataSet(
-                               
SingleSourceShortestPathsData.getDefaultEdgeDataSet(env),
-                               new InitMapperSSSP(), env);
+                       
SingleSourceShortestPathsData.getDefaultEdgeDataSet(env),
+                       new InitMapperSSSP(), env);
 
-        List<Vertex<Long, Double>> result = inputGraph.run(
-                               new GSASingleSourceShortestPaths<Long, 
NullValue>(1L, 16)).collect();
+               List<Vertex<Long, Double>> result = inputGraph.run(
+                       new GSASingleSourceShortestPaths<Long, NullValue>(1L, 
16)).collect();
 
                expectedResult = "1,0.0\n" +
-                               "2,12.0\n" +
-                               "3,13.0\n" +
-                               "4,47.0\n" +
-                               "5,48.0\n";
+                       "2,12.0\n" +
+                       "3,13.0\n" +
+                       "4,47.0\n" +
+                       "5,48.0\n";
 
                compareResultAsTuples(result, expectedResult);
        }

http://git-wip-us.apache.org/repos/asf/flink/blob/cb282067/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/test/examples/SingleSourceShortestPathsITCase.java
----------------------------------------------------------------------
diff --git 
a/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/test/examples/SingleSourceShortestPathsITCase.java
 
b/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/test/examples/SingleSourceShortestPathsITCase.java
index 9019d0b..2fd8812 100644
--- 
a/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/test/examples/SingleSourceShortestPathsITCase.java
+++ 
b/flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/test/examples/SingleSourceShortestPathsITCase.java
@@ -40,51 +40,51 @@ import java.io.File;
 @RunWith(Parameterized.class)
 public class SingleSourceShortestPathsITCase extends MultipleProgramsTestBase {
 
-    private String edgesPath;
-
-    private String resultPath;
-
-    private String expected;
-
-    @Rule
-    public TemporaryFolder tempFolder = new TemporaryFolder();
-
-    public SingleSourceShortestPathsITCase(TestExecutionMode mode) {
-        super(mode);
-    }
-
-    @Before
-    public void before() throws Exception {
-        resultPath = tempFolder.newFile().toURI().toString();
-
-        File edgesFile = tempFolder.newFile();
-        Files.write(SingleSourceShortestPathsData.EDGES, edgesFile, 
Charsets.UTF_8);
-        edgesPath = edgesFile.toURI().toString();
-    }
-
-    @Test
-    public void testSSSPExample() throws Exception {
-        SingleSourceShortestPaths.main(new 
String[]{SingleSourceShortestPathsData.SRC_VERTEX_ID + "",
-                edgesPath, resultPath, 10 + ""});
-        expected = 
SingleSourceShortestPathsData.RESULTED_SINGLE_SOURCE_SHORTEST_PATHS;
-    }
-
-    @Test
-    public void testGSASSSPExample() throws Exception {
-        GSASingleSourceShortestPaths.main(new 
String[]{SingleSourceShortestPathsData.SRC_VERTEX_ID + "",
-                edgesPath, resultPath, 10 + ""});
-        expected = 
SingleSourceShortestPathsData.RESULTED_SINGLE_SOURCE_SHORTEST_PATHS;
-    }
-
-    @Test
-    public void testPregelSSSPExample() throws Exception {
-        PregelSSSP.main(new 
String[]{SingleSourceShortestPathsData.SRC_VERTEX_ID + "",
-                edgesPath, resultPath, 10 + ""});
-        expected = 
SingleSourceShortestPathsData.RESULTED_SINGLE_SOURCE_SHORTEST_PATHS;
-    }
-
-    @After
-    public void after() throws Exception {
-        TestBaseUtils.compareResultsByLinesInMemory(expected, resultPath);
-    }
+       private String edgesPath;
+
+       private String resultPath;
+
+       private String expected;
+
+       @Rule
+       public TemporaryFolder tempFolder = new TemporaryFolder();
+
+       public SingleSourceShortestPathsITCase(TestExecutionMode mode) {
+               super(mode);
+       }
+
+       @Before
+       public void before() throws Exception {
+               resultPath = tempFolder.newFile().toURI().toString();
+
+               File edgesFile = tempFolder.newFile();
+               Files.write(SingleSourceShortestPathsData.EDGES, edgesFile, 
Charsets.UTF_8);
+               edgesPath = edgesFile.toURI().toString();
+       }
+
+       @Test
+       public void testSSSPExample() throws Exception {
+               SingleSourceShortestPaths.main(new String[]{ 
SingleSourceShortestPathsData.SRC_VERTEX_ID + "",
+                       edgesPath, resultPath, 10 + "" });
+               expected = 
SingleSourceShortestPathsData.RESULTED_SINGLE_SOURCE_SHORTEST_PATHS;
+       }
+
+       @Test
+       public void testGSASSSPExample() throws Exception {
+               GSASingleSourceShortestPaths.main(new String[]{ 
SingleSourceShortestPathsData.SRC_VERTEX_ID + "",
+                       edgesPath, resultPath, 10 + "" });
+               expected = 
SingleSourceShortestPathsData.RESULTED_SINGLE_SOURCE_SHORTEST_PATHS;
+       }
+
+       @Test
+       public void testPregelSSSPExample() throws Exception {
+               PregelSSSP.main(new String[]{ 
SingleSourceShortestPathsData.SRC_VERTEX_ID + "",
+                       edgesPath, resultPath, 10 + "" });
+               expected = 
SingleSourceShortestPathsData.RESULTED_SINGLE_SOURCE_SHORTEST_PATHS;
+       }
+
+       @After
+       public void after() throws Exception {
+               TestBaseUtils.compareResultsByLinesInMemory(expected, 
resultPath);
+       }
 }

http://git-wip-us.apache.org/repos/asf/flink/blob/cb282067/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/GatherSumApplyConfigurationITCase.java
----------------------------------------------------------------------
diff --git 
a/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/GatherSumApplyConfigurationITCase.java
 
b/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/GatherSumApplyConfigurationITCase.java
index 98ecf16..183522d 100644
--- 
a/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/GatherSumApplyConfigurationITCase.java
+++ 
b/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/GatherSumApplyConfigurationITCase.java
@@ -59,7 +59,7 @@ public class GatherSumApplyConfigurationITCase extends 
MultipleProgramsTestBase
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Long, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongVertices(),
-                               TestGraphUtils.getLongLongEdges(), 
env).mapVertices(new AssignOneMapper());
+                       TestGraphUtils.getLongLongEdges(), env).mapVertices(new 
AssignOneMapper());
 
                // create the configuration object
                GSAConfiguration parameters = new GSAConfiguration();
@@ -71,31 +71,30 @@ public class GatherSumApplyConfigurationITCase extends 
MultipleProgramsTestBase
                parameters.setOptNumVertices(true);
 
                Graph<Long, Long, Long> res = 
graph.runGatherSumApplyIteration(new Gather(), new Sum(),
-                               new Apply(), 10, parameters);
+                       new Apply(), 10, parameters);
 
-        DataSet<Vertex<Long, Long>> data = res.getVertices();
-        List<Vertex<Long, Long>> result= data.collect();
+               DataSet<Vertex<Long, Long>> data = res.getVertices();
+               List<Vertex<Long, Long>> result = data.collect();
 
                expectedResult = "1,11\n" +
-                               "2,11\n" +
-                               "3,11\n" +
-                               "4,11\n" +
-                               "5,11";
-               
+                       "2,11\n" +
+                       "3,11\n" +
+                       "4,11\n" +
+                       "5,11";
+
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testIterationConfiguration() throws Exception {
-
                /*
                 * Test name, parallelism and solutionSetUnmanaged parameters
                 */
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                GatherSumApplyIteration<Long, Long, Long, Long> iteration = 
GatherSumApplyIteration
-                               
.withEdges(TestGraphUtils.getLongLongEdgeData(env), new DummyGather(),
-                                               new DummySum(), new 
DummyApply(), 10);
+                       .withEdges(TestGraphUtils.getLongLongEdgeData(env), new 
DummyGather(),
+                               new DummySum(), new DummyApply(), 10);
 
                GSAConfiguration parameters = new GSAConfiguration();
                parameters.setName("gelly iteration");
@@ -109,20 +108,19 @@ public class GatherSumApplyConfigurationITCase extends 
MultipleProgramsTestBase
                Assert.assertEquals(true, 
iteration.getIterationConfiguration().isSolutionSetUnmanagedMemory());
 
                DataSet<Vertex<Long, Long>> data = 
TestGraphUtils.getLongLongVertexData(env).runOperation(iteration);
-        List<Vertex<Long, Long>> result= data.collect();
-        
+               List<Vertex<Long, Long>> result = data.collect();
+
                expectedResult = "1,11\n" +
-                               "2,12\n" +
-                               "3,13\n" +
-                               "4,14\n" +
-                               "5,15";
-               
+                       "2,12\n" +
+                       "3,13\n" +
+                       "4,14\n" +
+                       "5,15";
+
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testIterationDefaultDirection() throws Exception {
-
                /*
                 * Test that if no direction parameter is given, the iteration 
works as before
                 * (i.e. it gathers information from the IN edges and neighbors 
and the information is calculated for an OUT edge
@@ -137,27 +135,26 @@ public class GatherSumApplyConfigurationITCase extends 
MultipleProgramsTestBase
                edges.remove(0);
 
                Graph<Long, HashSet<Long>, Long> graph = Graph
-                               
.fromCollection(TestGraphUtils.getLongLongVertices(), edges, env)
-                               .mapVertices(new 
GatherSumApplyConfigurationITCase.InitialiseHashSetMapper());
+                       .fromCollection(TestGraphUtils.getLongLongVertices(), 
edges, env)
+                       .mapVertices(new 
GatherSumApplyConfigurationITCase.InitialiseHashSetMapper());
 
                DataSet<Vertex<Long, HashSet<Long>>> resultedVertices = 
graph.runGatherSumApplyIteration(
                                new GetReachableVertices(), new 
FindAllReachableVertices(), new UpdateReachableVertices(), 4)
-                               .getVertices();
+                       .getVertices();
 
                List<Vertex<Long, HashSet<Long>>> result = 
resultedVertices.collect();
 
                expectedResult = "1,[1, 2, 3, 4, 5]\n"
-                                               +"2,[2]\n"
-                                               +"3,[1, 2, 3, 4, 5]\n"
-                                               +"4,[1, 2, 3, 4, 5]\n"
-                                               +"5,[1, 2, 3, 4, 5]\n";
+                       + "2,[2]\n"
+                       + "3,[1, 2, 3, 4, 5]\n"
+                       + "4,[1, 2, 3, 4, 5]\n"
+                       + "5,[1, 2, 3, 4, 5]\n";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testIterationDirectionIN() throws Exception {
-
                /*
                 * Test that if the direction parameter IN is given, the 
iteration works as expected
                 * (i.e. it gathers information from the OUT edges and 
neighbors and the information is calculated for an IN edge
@@ -175,27 +172,26 @@ public class GatherSumApplyConfigurationITCase extends 
MultipleProgramsTestBase
                edges.remove(0);
 
                Graph<Long, HashSet<Long>, Long> graph = Graph
-                               
.fromCollection(TestGraphUtils.getLongLongVertices(), edges, env)
-                               .mapVertices(new 
GatherSumApplyConfigurationITCase.InitialiseHashSetMapper());
+                       .fromCollection(TestGraphUtils.getLongLongVertices(), 
edges, env)
+                       .mapVertices(new 
GatherSumApplyConfigurationITCase.InitialiseHashSetMapper());
 
                DataSet<Vertex<Long, HashSet<Long>>> resultedVertices = 
graph.runGatherSumApplyIteration(
                                new GetReachableVertices(), new 
FindAllReachableVertices(), new UpdateReachableVertices(), 4,
-                                                                               
                                                                                
                                parameters)
-                               .getVertices();
+                               parameters)
+                       .getVertices();
                List<Vertex<Long, HashSet<Long>>> result = 
resultedVertices.collect();
 
                expectedResult = "1,[1, 3, 4, 5]\n"
-                               +"2,[1, 2, 3, 4, 5]\n"
-                               +"3,[1, 3, 4, 5]\n"
-                               +"4,[1, 3, 4, 5]\n"
-                               +"5,[1, 3, 4, 5]\n";
+                       + "2,[1, 2, 3, 4, 5]\n"
+                       + "3,[1, 3, 4, 5]\n"
+                       + "4,[1, 3, 4, 5]\n"
+                       + "5,[1, 3, 4, 5]\n";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testIterationDirectionALL() throws Exception {
-
                /*
                 * Test that if the direction parameter OUT is given, the 
iteration works as expected
                 * (i.e. it gathers information from both IN and OUT edges and 
neighbors
@@ -212,21 +208,21 @@ public class GatherSumApplyConfigurationITCase extends 
MultipleProgramsTestBase
                edges.remove(0);
 
                Graph<Long, HashSet<Long>, Long> graph = Graph
-                               
.fromCollection(TestGraphUtils.getLongLongVertices(), edges, env)
-                               .mapVertices(new 
GatherSumApplyConfigurationITCase.InitialiseHashSetMapper());
+                       .fromCollection(TestGraphUtils.getLongLongVertices(), 
edges, env)
+                       .mapVertices(new 
GatherSumApplyConfigurationITCase.InitialiseHashSetMapper());
 
                DataSet<Vertex<Long, HashSet<Long>>> resultedVertices = 
graph.runGatherSumApplyIteration(
                                new GetReachableVertices(), new 
FindAllReachableVertices(), new UpdateReachableVertices(), 4,
                                parameters)
-                               .getVertices();
+                       .getVertices();
 
                List<Vertex<Long, HashSet<Long>>> result = 
resultedVertices.collect();
 
                expectedResult = "1,[1, 2, 3, 4, 5]\n"
-                               +"2,[1, 2, 3, 4, 5]\n"
-                               +"3,[1, 2, 3, 4, 5]\n"
-                               +"4,[1, 2, 3, 4, 5]\n"
-                               +"5,[1, 2, 3, 4, 5]\n";
+                       + "2,[1, 2, 3, 4, 5]\n"
+                       + "3,[1, 2, 3, 4, 5]\n"
+                       + "4,[1, 2, 3, 4, 5]\n"
+                       + "5,[1, 2, 3, 4, 5]\n";
 
                compareResultAsTuples(result, expectedResult);
        }
@@ -246,7 +242,7 @@ public class GatherSumApplyConfigurationITCase extends 
MultipleProgramsTestBase
 
                        // test aggregator
                        if (getSuperstepNumber() == 2) {
-                               long aggrValue = 
((LongValue)getPreviousIterationAggregate("superstepAggregator")).getValue();
+                               long aggrValue = ((LongValue) 
getPreviousIterationAggregate("superstepAggregator")).getValue();
 
                                Assert.assertEquals(7, aggrValue);
                        }
@@ -381,7 +377,7 @@ public class GatherSumApplyConfigurationITCase extends 
MultipleProgramsTestBase
        private static final class FindAllReachableVertices extends 
SumFunction<HashSet<Long>, Long, HashSet<Long>> {
                @Override
                public HashSet<Long> sum(HashSet<Long> newSet, HashSet<Long> 
currentSet) {
-                       for(Long l : newSet) {
+                       for (Long l : newSet) {
                                currentSet.add(l);
                        }
                        return currentSet;
@@ -394,7 +390,7 @@ public class GatherSumApplyConfigurationITCase extends 
MultipleProgramsTestBase
                @Override
                public void apply(HashSet<Long> newValue, HashSet<Long> 
currentValue) {
                        newValue.addAll(currentValue);
-                       if(newValue.size()>currentValue.size()) {
+                       if (newValue.size() > currentValue.size()) {
                                setResult(newValue);
                        }
                }

http://git-wip-us.apache.org/repos/asf/flink/blob/cb282067/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/ScatterGatherConfigurationITCase.java
----------------------------------------------------------------------
diff --git 
a/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/ScatterGatherConfigurationITCase.java
 
b/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/ScatterGatherConfigurationITCase.java
index 9100883..3c091a9 100644
--- 
a/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/ScatterGatherConfigurationITCase.java
+++ 
b/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/ScatterGatherConfigurationITCase.java
@@ -46,11 +46,11 @@ import java.util.List;
 @RunWith(Parameterized.class)
 public class ScatterGatherConfigurationITCase extends MultipleProgramsTestBase 
{
 
-       public ScatterGatherConfigurationITCase(TestExecutionMode mode){
+       public ScatterGatherConfigurationITCase(TestExecutionMode mode) {
                super(mode);
        }
 
-    private String expectedResult;
+       private String expectedResult;
 
        @Test
        public void testRunWithConfiguration() throws Exception {
@@ -60,7 +60,7 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Long, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongVertices(),
-                               TestGraphUtils.getLongLongEdges(), 
env).mapVertices(new AssignOneMapper());
+                       TestGraphUtils.getLongLongEdges(), env).mapVertices(new 
AssignOneMapper());
 
                // create the configuration object
                ScatterGatherConfiguration parameters = new 
ScatterGatherConfiguration();
@@ -71,31 +71,30 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                parameters.setOptNumVertices(true);
 
                Graph<Long, Long, Long> res = graph.runScatterGatherIteration(
-                               new MessageFunction(), new UpdateFunction(), 
10, parameters);
+                       new MessageFunction(), new UpdateFunction(), 10, 
parameters);
 
                DataSet<Vertex<Long, Long>> data = res.getVertices();
-               List<Vertex<Long, Long>> result= data.collect();
+               List<Vertex<Long, Long>> result = data.collect();
 
                expectedResult = "1,11\n" +
-                                               "2,11\n" +
-                                               "3,11\n" +
-                                               "4,11\n" +
-                                               "5,11";
+                       "2,11\n" +
+                       "3,11\n" +
+                       "4,11\n" +
+                       "5,11";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testIterationConfiguration() throws Exception {
-
                /*
                 * Test name, parallelism and solutionSetUnmanaged parameters
                 */
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                ScatterGatherIteration<Long, Long, Long, Long> iteration = 
ScatterGatherIteration
-                               
.withEdges(TestGraphUtils.getLongLongEdgeData(env), new DummyMessageFunction(),
-                                               new DummyUpdateFunction(), 10);
+                       .withEdges(TestGraphUtils.getLongLongEdgeData(env), new 
DummyMessageFunction(),
+                               new DummyUpdateFunction(), 10);
 
                ScatterGatherConfiguration parameters = new 
ScatterGatherConfiguration();
                parameters.setName("gelly iteration");
@@ -109,13 +108,13 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                Assert.assertEquals(true, 
iteration.getIterationConfiguration().isSolutionSetUnmanagedMemory());
 
                DataSet<Vertex<Long, Long>> data = 
TestGraphUtils.getLongLongVertexData(env).runOperation(iteration);
-        List<Vertex<Long, Long>> result= data.collect();
+               List<Vertex<Long, Long>> result = data.collect();
 
                expectedResult = "1,11\n" +
-                                               "2,12\n" +
-                                               "3,13\n" +
-                                               "4,14\n" +
-                                               "5,15";
+                       "2,12\n" +
+                       "3,13\n" +
+                       "4,14\n" +
+                       "5,15";
 
                compareResultAsTuples(result, expectedResult);
        }
@@ -129,27 +128,26 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Long, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongVertices(),
-                               TestGraphUtils.getLongLongEdges(), 
env).mapVertices(new AssignOneMapper());
+                       TestGraphUtils.getLongLongEdges(), env).mapVertices(new 
AssignOneMapper());
 
                Graph<Long, Long, Long> res = graph.runScatterGatherIteration(
-                               new MessageFunctionDefault(), new 
UpdateFunctionDefault(), 5);
+                       new MessageFunctionDefault(), new 
UpdateFunctionDefault(), 5);
 
 
                DataSet<Tuple2<Long, Long>> data = res.getVertices().map(new 
VertexToTuple2Map<Long, Long>());
-               List<Tuple2<Long, Long>> result= data.collect();
+               List<Tuple2<Long, Long>> result = data.collect();
 
                expectedResult = "1,6\n" +
-                                               "2,6\n" +
-                                               "3,6\n" +
-                                               "4,6\n" +
-                                               "5,6";
+                       "2,6\n" +
+                       "3,6\n" +
+                       "4,6\n" +
+                       "5,6";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testIterationDefaultDirection() throws Exception {
-
                /*
                 * Test that if no direction parameter is given, the iteration 
works as before
                 * (i.e. it collects messages from the in-neighbors and sends 
them to the out-neighbors)
@@ -157,27 +155,26 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, HashSet<Long>, Long> graph = Graph
-                               
.fromCollection(TestGraphUtils.getLongLongVertices(), 
TestGraphUtils.getLongLongEdges(), env)
-                               .mapVertices(new InitialiseHashSetMapper());
+                       .fromCollection(TestGraphUtils.getLongLongVertices(), 
TestGraphUtils.getLongLongEdges(), env)
+                       .mapVertices(new InitialiseHashSetMapper());
 
                DataSet<Vertex<Long, HashSet<Long>>> resultedVertices = graph
-                               .runScatterGatherIteration(new 
IdMessengerTrg(), new VertexUpdateDirection(), 5)
-                               .getVertices();
+                       .runScatterGatherIteration(new IdMessengerTrg(), new 
VertexUpdateDirection(), 5)
+                       .getVertices();
 
-        List<Vertex<Long, HashSet<Long>>> result= resultedVertices.collect();
+               List<Vertex<Long, HashSet<Long>>> result = 
resultedVertices.collect();
 
                expectedResult = "1,[5]\n" +
-                               "2,[1]\n" +
-                               "3,[1, 2]\n" +
-                               "4,[3]\n" +
-                               "5,[3, 4]";
+                       "2,[1]\n" +
+                       "3,[1, 2]\n" +
+                       "4,[3]\n" +
+                       "5,[3, 4]";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testIterationINDirection() throws Exception {
-
                /*
                 * Test that if the direction parameter is set to IN,
                 * messages are collected from the out-neighbors and sent to 
the in-neighbors.
@@ -185,8 +182,8 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, HashSet<Long>, Long> graph = Graph
-                               
.fromCollection(TestGraphUtils.getLongLongVertices(), 
TestGraphUtils.getLongLongEdges(), env)
-                               .mapVertices(new InitialiseHashSetMapper());
+                       .fromCollection(TestGraphUtils.getLongLongVertices(), 
TestGraphUtils.getLongLongEdges(), env)
+                       .mapVertices(new InitialiseHashSetMapper());
 
                // configure the iteration
                ScatterGatherConfiguration parameters = new 
ScatterGatherConfiguration();
@@ -194,23 +191,22 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                parameters.setDirection(EdgeDirection.IN);
 
                DataSet<Vertex<Long, HashSet<Long>>> resultedVertices = graph
-                               .runScatterGatherIteration(new 
IdMessengerSrc(), new VertexUpdateDirection(), 5, parameters)
-                               .getVertices();
+                       .runScatterGatherIteration(new IdMessengerSrc(), new 
VertexUpdateDirection(), 5, parameters)
+                       .getVertices();
 
-        List<Vertex<Long, HashSet<Long>>> result= resultedVertices.collect();
+               List<Vertex<Long, HashSet<Long>>> result = 
resultedVertices.collect();
 
                expectedResult = "1,[2, 3]\n" +
-                               "2,[3]\n" +
-                               "3,[4, 5]\n" +
-                               "4,[5]\n" +
-                               "5,[1]";
+                       "2,[3]\n" +
+                       "3,[4, 5]\n" +
+                       "4,[5]\n" +
+                       "5,[1]";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testIterationALLDirection() throws Exception {
-
                /*
                 * Test that if the direction parameter is set to ALL,
                 * messages are collected from all the neighbors and sent to 
all the neighbors.
@@ -218,8 +214,8 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, HashSet<Long>, Long> graph = Graph
-                               
.fromCollection(TestGraphUtils.getLongLongVertices(), 
TestGraphUtils.getLongLongEdges(), env)
-                               .mapVertices(new InitialiseHashSetMapper());
+                       .fromCollection(TestGraphUtils.getLongLongVertices(), 
TestGraphUtils.getLongLongEdges(), env)
+                       .mapVertices(new InitialiseHashSetMapper());
 
                // configure the iteration
                ScatterGatherConfiguration parameters = new 
ScatterGatherConfiguration();
@@ -227,23 +223,22 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                parameters.setDirection(EdgeDirection.ALL);
 
                DataSet<Vertex<Long, HashSet<Long>>> resultedVertices = graph
-                               .runScatterGatherIteration(new 
IdMessengerAll(), new VertexUpdateDirection(), 5, parameters)
-                               .getVertices();
+                       .runScatterGatherIteration(new IdMessengerAll(), new 
VertexUpdateDirection(), 5, parameters)
+                       .getVertices();
 
-               List<Vertex<Long, HashSet<Long>>> result= 
resultedVertices.collect();
+               List<Vertex<Long, HashSet<Long>>> result = 
resultedVertices.collect();
 
                expectedResult = "1,[2, 3, 5]\n" +
-                               "2,[1, 3]\n" +
-                               "3,[1, 2, 4, 5]\n" +
-                               "4,[3, 5]\n" +
-                               "5,[1, 3, 4]";
+                       "2,[1, 3]\n" +
+                       "3,[1, 2, 4, 5]\n" +
+                       "4,[3, 5]\n" +
+                       "5,[1, 3, 4]";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testSendToAllDirectionIN() throws Exception {
-
                /*
                 * Test that sendMessageToAllNeighbors() works correctly
                 * when the direction is set to IN
@@ -251,8 +246,8 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, HashSet<Long>, Long> graph = Graph
-                               
.fromCollection(TestGraphUtils.getLongLongVertices(), 
TestGraphUtils.getLongLongEdges(), env)
-                               .mapVertices(new InitialiseHashSetMapper());
+                       .fromCollection(TestGraphUtils.getLongLongVertices(), 
TestGraphUtils.getLongLongEdges(), env)
+                       .mapVertices(new InitialiseHashSetMapper());
 
                // configure the iteration
                ScatterGatherConfiguration parameters = new 
ScatterGatherConfiguration();
@@ -260,23 +255,22 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                parameters.setDirection(EdgeDirection.IN);
 
                DataSet<Vertex<Long, HashSet<Long>>> resultedVertices = graph
-                               .runScatterGatherIteration(new SendMsgToAll(), 
new VertexUpdateDirection(), 5, parameters)
-                               .getVertices();
+                       .runScatterGatherIteration(new SendMsgToAll(), new 
VertexUpdateDirection(), 5, parameters)
+                       .getVertices();
 
                List<Vertex<Long, HashSet<Long>>> result = 
resultedVertices.collect();
 
                expectedResult = "1,[2, 3]\n" +
-                               "2,[3]\n" +
-                               "3,[4, 5]\n" +
-                               "4,[5]\n" +
-                               "5,[1]";
+                       "2,[3]\n" +
+                       "3,[4, 5]\n" +
+                       "4,[5]\n" +
+                       "5,[1]";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testSendToAllDirectionOUT() throws Exception {
-
                /*
                 * Test that sendMessageToAllNeighbors() works correctly
                 * when the direction is set to OUT
@@ -284,8 +278,8 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, HashSet<Long>, Long> graph = Graph
-                               
.fromCollection(TestGraphUtils.getLongLongVertices(), 
TestGraphUtils.getLongLongEdges(), env)
-                               .mapVertices(new InitialiseHashSetMapper());
+                       .fromCollection(TestGraphUtils.getLongLongVertices(), 
TestGraphUtils.getLongLongEdges(), env)
+                       .mapVertices(new InitialiseHashSetMapper());
 
                // configure the iteration
                ScatterGatherConfiguration parameters = new 
ScatterGatherConfiguration();
@@ -293,23 +287,22 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                parameters.setDirection(EdgeDirection.OUT);
 
                DataSet<Vertex<Long, HashSet<Long>>> resultedVertices = graph
-                               .runScatterGatherIteration(new SendMsgToAll(), 
new VertexUpdateDirection(), 5, parameters)
-                               .getVertices();
+                       .runScatterGatherIteration(new SendMsgToAll(), new 
VertexUpdateDirection(), 5, parameters)
+                       .getVertices();
 
                List<Vertex<Long, HashSet<Long>>> result = 
resultedVertices.collect();
 
                expectedResult = "1,[5]\n" +
-                               "2,[1]\n" +
-                               "3,[1, 2]\n" +
-                               "4,[3]\n" +
-                               "5,[3, 4]";
+                       "2,[1]\n" +
+                       "3,[1, 2]\n" +
+                       "4,[3]\n" +
+                       "5,[3, 4]";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testSendToAllDirectionALL() throws Exception {
-
                /*
                 * Test that sendMessageToAllNeighbors() works correctly
                 * when the direction is set to ALL
@@ -317,8 +310,8 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, HashSet<Long>, Long> graph = Graph
-                               
.fromCollection(TestGraphUtils.getLongLongVertices(), 
TestGraphUtils.getLongLongEdges(), env)
-                               .mapVertices(new InitialiseHashSetMapper());
+                       .fromCollection(TestGraphUtils.getLongLongVertices(), 
TestGraphUtils.getLongLongEdges(), env)
+                       .mapVertices(new InitialiseHashSetMapper());
 
                // configure the iteration
                ScatterGatherConfiguration parameters = new 
ScatterGatherConfiguration();
@@ -326,16 +319,16 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                parameters.setDirection(EdgeDirection.ALL);
 
                DataSet<Vertex<Long, HashSet<Long>>> resultedVertices = graph
-                               .runScatterGatherIteration(new SendMsgToAll(), 
new VertexUpdateDirection(), 5, parameters)
-                               .getVertices();
+                       .runScatterGatherIteration(new SendMsgToAll(), new 
VertexUpdateDirection(), 5, parameters)
+                       .getVertices();
 
                List<Vertex<Long, HashSet<Long>>> result = 
resultedVertices.collect();
 
                expectedResult = "1,[2, 3, 5]\n" +
-                               "2,[1, 3]\n" +
-                               "3,[1, 2, 4, 5]\n" +
-                               "4,[3, 5]\n" +
-                               "5,[1, 3, 4]";
+                       "2,[1, 3]\n" +
+                       "3,[1, 2, 4, 5]\n" +
+                       "4,[3, 5]\n" +
+                       "5,[1, 3, 4]";
 
                compareResultAsTuples(result, expectedResult);
        }
@@ -350,25 +343,24 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Long, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongVertices(),
-                               TestGraphUtils.getLongLongEdges(), env);
+                       TestGraphUtils.getLongLongEdges(), env);
 
                DataSet<Vertex<Long, Long>> verticesWithNumVertices = 
graph.runScatterGatherIteration(new DummyMessageFunction(),
-                               new UpdateFunctionNumVertices(), 
2).getVertices();
+                       new UpdateFunctionNumVertices(), 2).getVertices();
 
-               List<Vertex<Long, Long>> result= 
verticesWithNumVertices.collect();
+               List<Vertex<Long, Long>> result = 
verticesWithNumVertices.collect();
 
                expectedResult = "1,-1\n" +
-                               "2,-1\n" +
-                               "3,-1\n" +
-                               "4,-1\n" +
-                               "5,-1";
+                       "2,-1\n" +
+                       "3,-1\n" +
+                       "4,-1\n" +
+                       "5,-1";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testInDegreesSet() throws Exception {
-
                /*
                 * Test that if the degrees are set, they can be accessed in 
every superstep
                 * inside the update function and the value
@@ -377,7 +369,7 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Long, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongVertices(),
-                               TestGraphUtils.getLongLongEdges(), env);
+                       TestGraphUtils.getLongLongEdges(), env);
 
                // configure the iteration
                ScatterGatherConfiguration parameters = new 
ScatterGatherConfiguration();
@@ -385,47 +377,45 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                parameters.setOptDegrees(true);
 
                DataSet<Vertex<Long, Long>> verticesWithDegrees = 
graph.runScatterGatherIteration(
-                               new DegreesMessageFunction(), new 
UpdateFunctionInDegrees(), 5, parameters).getVertices();
+                       new DegreesMessageFunction(), new 
UpdateFunctionInDegrees(), 5, parameters).getVertices();
 
-               List<Vertex<Long, Long>> result= verticesWithDegrees.collect();
+               List<Vertex<Long, Long>> result = verticesWithDegrees.collect();
 
                expectedResult = "1,1\n" +
-                               "2,1\n" +
-                               "3,2\n" +
-                               "4,1\n" +
-                               "5,2";
+                       "2,1\n" +
+                       "3,2\n" +
+                       "4,1\n" +
+                       "5,2";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testInDegreesNotSet() throws Exception {
-
                /*
                 * Test that if the degrees option is not set, then -1 is 
returned as a value for in-degree.
                 */
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Long, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongVertices(),
-                               TestGraphUtils.getLongLongEdges(), env);
+                       TestGraphUtils.getLongLongEdges(), env);
 
                DataSet<Vertex<Long, Long>> verticesWithDegrees = 
graph.runScatterGatherIteration(
-                               new DummyMessageFunction(), new 
UpdateFunctionInDegrees(), 2).getVertices();
+                       new DummyMessageFunction(), new 
UpdateFunctionInDegrees(), 2).getVertices();
 
-               List<Vertex<Long, Long>> result= verticesWithDegrees.collect();
+               List<Vertex<Long, Long>> result = verticesWithDegrees.collect();
 
                expectedResult = "1,-1\n" +
-                               "2,-1\n" +
-                               "3,-1\n" +
-                               "4,-1\n" +
-                               "5,-1";
+                       "2,-1\n" +
+                       "3,-1\n" +
+                       "4,-1\n" +
+                       "5,-1";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testOutDegreesSet() throws Exception {
-
                /*
                 * Test that if the degrees are set, they can be accessed in 
every superstep
                 * inside the update function and the value
@@ -434,7 +424,7 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Long, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongVertices(),
-                               TestGraphUtils.getLongLongEdges(), env);
+                       TestGraphUtils.getLongLongEdges(), env);
 
                // configure the iteration
                ScatterGatherConfiguration parameters = new 
ScatterGatherConfiguration();
@@ -442,47 +432,45 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                parameters.setOptDegrees(true);
 
                DataSet<Vertex<Long, Long>> verticesWithDegrees = 
graph.runScatterGatherIteration(
-                               new DegreesMessageFunction(), new 
UpdateFunctionOutDegrees(), 5, parameters).getVertices();
+                       new DegreesMessageFunction(), new 
UpdateFunctionOutDegrees(), 5, parameters).getVertices();
 
-               List<Vertex<Long, Long>> result= verticesWithDegrees.collect();
+               List<Vertex<Long, Long>> result = verticesWithDegrees.collect();
 
                expectedResult = "1,2\n" +
-                               "2,1\n" +
-                               "3,2\n" +
-                               "4,1\n" +
-                               "5,1";
+                       "2,1\n" +
+                       "3,2\n" +
+                       "4,1\n" +
+                       "5,1";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testOutDegreesNotSet() throws Exception {
-
                /*
                 * Test that if the degrees option is not set, then -1 is 
returned as a value for out-degree.
                 */
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Long, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongVertices(),
-                               TestGraphUtils.getLongLongEdges(), env);
+                       TestGraphUtils.getLongLongEdges(), env);
 
                DataSet<Vertex<Long, Long>> verticesWithDegrees = 
graph.runScatterGatherIteration(
-                               new DummyMessageFunction(), new 
UpdateFunctionInDegrees(), 2).getVertices();
+                       new DummyMessageFunction(), new 
UpdateFunctionOutDegrees(), 2).getVertices();
 
-               List<Vertex<Long, Long>> result= verticesWithDegrees.collect();
+               List<Vertex<Long, Long>> result = verticesWithDegrees.collect();
 
                expectedResult = "1,-1\n" +
-                               "2,-1\n" +
-                               "3,-1\n" +
-                               "4,-1\n" +
-                               "5,-1";
+                       "2,-1\n" +
+                       "3,-1\n" +
+                       "4,-1\n" +
+                       "5,-1";
 
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testDirectionALLAndDegrees() throws Exception {
-
                /*
                 * Compute the number of neighbors in a vertex - centric 
manner, and verify that it is equal to
                 * the sum: inDegree + outDegree.
@@ -490,7 +478,7 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
                Graph<Long, Boolean, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongBooleanVertices(),
-                               TestGraphUtils.getLongLongEdges(), env);
+                       TestGraphUtils.getLongLongEdges(), env);
 
                // configure the iteration
                ScatterGatherConfiguration parameters = new 
ScatterGatherConfiguration();
@@ -499,15 +487,15 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                parameters.setDirection(EdgeDirection.ALL);
 
                DataSet<Vertex<Long, Boolean>> verticesWithNumNeighbors = 
graph.runScatterGatherIteration(
-                               new IdMessenger(), new 
VertexUpdateNumNeighbors(), 1, parameters).getVertices();
+                       new IdMessenger(), new VertexUpdateNumNeighbors(), 1, 
parameters).getVertices();
 
-               List<Vertex<Long, Boolean>> result= 
verticesWithNumNeighbors.collect();
+               List<Vertex<Long, Boolean>> result = 
verticesWithNumNeighbors.collect();
 
                expectedResult = "1,true\n" +
-                               "2,true\n" +
-                               "3,true\n" +
-                               "4,true\n" +
-                               "5,true";
+                       "2,true\n" +
+                       "3,true\n" +
+                       "4,true\n" +
+                       "5,true";
 
                compareResultAsTuples(result, expectedResult);
        }
@@ -530,7 +518,7 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
 
                        // test aggregator
                        if (getSuperstepNumber() == 2) {
-                               long aggrValue = 
((LongValue)getPreviousIterationAggregate("superstepAggregator")).getValue();
+                               long aggrValue = ((LongValue) 
getPreviousIterationAggregate("superstepAggregator")).getValue();
                                Assert.assertEquals(5, aggrValue);
                        }
                }
@@ -612,7 +600,7 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
 
                @Override
                public void updateVertex(Vertex<Long, Long> vertex, 
MessageIterator<Long> inMessages) {
-                               setNewVertexValue(getNumberOfVertices());
+                       setNewVertexValue(getNumberOfVertices());
                }
        }
 
@@ -642,8 +630,7 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                        if (vertex.getId() == 1) {
                                Assert.assertEquals(2, getOutDegree());
                                Assert.assertEquals(1, getInDegree());
-                       }
-                       else if(vertex.getId() == 3) {
+                       } else if (vertex.getId() == 3) {
                                Assert.assertEquals(2, getOutDegree());
                                Assert.assertEquals(2, getInDegree());
                        }
@@ -659,7 +646,7 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                public void updateVertex(Vertex<Long, HashSet<Long>> vertex, 
MessageIterator<Long> messages) throws Exception {
                        vertex.getValue().clear();
 
-                       for(long msg : messages) {
+                       for (long msg : messages) {
                                vertex.getValue().add(msg);
                        }
 
@@ -688,15 +675,14 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
        }
 
        @SuppressWarnings("serial")
-       private static final class VertexUpdateNumNeighbors extends 
GatherFunction<Long, Boolean,
-                       Long> {
+       private static final class VertexUpdateNumNeighbors extends 
GatherFunction<Long, Boolean, Long> {
 
                @Override
                public void updateVertex(Vertex<Long, Boolean> vertex, 
MessageIterator<Long> messages) throws Exception {
 
                        long count = 0;
 
-                       for(@SuppressWarnings("unused") long msg : messages) {
+                       for (@SuppressWarnings("unused") long msg : messages) {
                                count++;
                        }
                        setNewVertexValue(count == (getInDegree() + 
getOutDegree()));
@@ -731,7 +717,7 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                @Override
                public void sendMessages(Vertex<Long, HashSet<Long>> vertex) 
throws Exception {
                        for (Edge<Long, Long> edge : getEdges()) {
-                               if(!edge.getSource().equals(vertex.getId())) {
+                               if (!edge.getSource().equals(vertex.getId())) {
                                        sendMessageTo(edge.getSource(), 
vertex.getId());
                                } else {
                                        sendMessageTo(edge.getTarget(), 
vertex.getId());
@@ -755,7 +741,7 @@ public class ScatterGatherConfigurationITCase extends 
MultipleProgramsTestBase {
                @Override
                public void sendMessages(Vertex<Long, Boolean> vertex) throws 
Exception {
                        for (Edge<Long, Long> edge : getEdges()) {
-                               if(!edge.getSource().equals(vertex.getId())) {
+                               if (!edge.getSource().equals(vertex.getId())) {
                                        sendMessageTo(edge.getSource(), 
vertex.getId());
                                } else {
                                        sendMessageTo(edge.getTarget(), 
vertex.getId());

http://git-wip-us.apache.org/repos/asf/flink/blob/cb282067/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/DegreesITCase.java
----------------------------------------------------------------------
diff --git 
a/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/DegreesITCase.java
 
b/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/DegreesITCase.java
index db2ca0d..280eb92 100644
--- 
a/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/DegreesITCase.java
+++ 
b/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/DegreesITCase.java
@@ -18,7 +18,6 @@
 
 package org.apache.flink.graph.test.operations;
 
-import java.util.List;
 import org.apache.flink.api.java.DataSet;
 import org.apache.flink.api.java.ExecutionEnvironment;
 import org.apache.flink.api.java.tuple.Tuple2;
@@ -31,149 +30,147 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 
+import java.util.List;
+
 @RunWith(Parameterized.class)
 public class DegreesITCase extends MultipleProgramsTestBase {
 
-       public DegreesITCase(TestExecutionMode mode){
+       public DegreesITCase(TestExecutionMode mode) {
                super(mode);
        }
 
-    private String expectedResult;
-
+       private String expectedResult;
 
        @Test
        public void testOutDegrees() throws Exception {
                /*
                * Test outDegrees()
                */
-        final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
-
-        Graph<Long, Long, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
-                TestGraphUtils.getLongLongEdgeData(env), env);
-
-        DataSet<Tuple2<Long, LongValue>> data = graph.outDegrees();
-        List<Tuple2<Long, LongValue>> result = data.collect();
-       
-        
-        expectedResult = "1,2\n" +
-                    "2,1\n" +
-                    "3,2\n" +
-                    "4,1\n" +
-                    "5,1\n";
-        
-        compareResultAsTuples(result, expectedResult);
-        
-    }
+               final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
+
+               Graph<Long, Long, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
+                       TestGraphUtils.getLongLongEdgeData(env), env);
+
+               DataSet<Tuple2<Long, LongValue>> data = graph.outDegrees();
+               List<Tuple2<Long, LongValue>> result = data.collect();
+
+
+               expectedResult = "1,2\n" +
+                       "2,1\n" +
+                       "3,2\n" +
+                       "4,1\n" +
+                       "5,1\n";
+
+               compareResultAsTuples(result, expectedResult);
+       }
 
        @Test
        public void testOutDegreesWithNoOutEdges() throws Exception {
                /*
                 * Test outDegrees() no outgoing edges
                 */
-        final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
-
-        Graph<Long, Long, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
-                TestGraphUtils.getLongLongEdgeDataWithZeroDegree(env), env);
-
-        
-        
-        DataSet<Tuple2<Long, LongValue>> data = graph.outDegrees();
-        List<Tuple2<Long, LongValue>> result = data.collect();
-        
-        expectedResult = "1,3\n" +
-                "2,1\n" +
-                "3,1\n" +
-                "4,1\n" +
-                "5,0\n";
-        
-        compareResultAsTuples(result, expectedResult);
-    }
+               final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
+
+               Graph<Long, Long, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
+                       TestGraphUtils.getLongLongEdgeDataWithZeroDegree(env), 
env);
+
+
+               DataSet<Tuple2<Long, LongValue>> data = graph.outDegrees();
+               List<Tuple2<Long, LongValue>> result = data.collect();
+
+               expectedResult = "1,3\n" +
+                       "2,1\n" +
+                       "3,1\n" +
+                       "4,1\n" +
+                       "5,0\n";
+
+               compareResultAsTuples(result, expectedResult);
+       }
 
        @Test
        public void testInDegrees() throws Exception {
                /*
                 * Test inDegrees()
                 */
-           final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
+               final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
 
-           Graph<Long, Long, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
-                   TestGraphUtils.getLongLongEdgeData(env), env);
+               Graph<Long, Long, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
+                       TestGraphUtils.getLongLongEdgeData(env), env);
 
+               DataSet<Tuple2<Long, LongValue>> data = graph.inDegrees();
+               List<Tuple2<Long, LongValue>> result = data.collect();
 
-        DataSet<Tuple2<Long, LongValue>> data = graph.inDegrees();
-        List<Tuple2<Long, LongValue>> result = data.collect();
-           
-           expectedResult = "1,1\n" +
-                           "2,1\n" +
-                           "3,2\n" +
-                           "4,1\n" +
-                           "5,2\n";
-           compareResultAsTuples(result, expectedResult);
-    }
+               expectedResult = "1,1\n" +
+                       "2,1\n" +
+                       "3,2\n" +
+                       "4,1\n" +
+                       "5,2\n";
+               compareResultAsTuples(result, expectedResult);
+       }
 
        @Test
        public void testInDegreesWithNoInEdge() throws Exception {
                /*
                 * Test inDegrees() no ingoing edge
                 */
-        final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
-
-        Graph<Long, Long, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
-                TestGraphUtils.getLongLongEdgeDataWithZeroDegree(env), env);
-
-        DataSet<Tuple2<Long, LongValue>> data = graph.inDegrees();
-        List<Tuple2<Long, LongValue>> result = data.collect();
-        
-        expectedResult = "1,0\n" +
-                       "2,1\n" +
-                       "3,1\n" +
-                       "4,1\n" +
-                       "5,3\n";
-        
-        compareResultAsTuples(result, expectedResult);
-    }
+               final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
+
+               Graph<Long, Long, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
+                       TestGraphUtils.getLongLongEdgeDataWithZeroDegree(env), 
env);
+
+               DataSet<Tuple2<Long, LongValue>> data = graph.inDegrees();
+               List<Tuple2<Long, LongValue>> result = data.collect();
+
+               expectedResult = "1,0\n" +
+                       "2,1\n" +
+                       "3,1\n" +
+                       "4,1\n" +
+                       "5,3\n";
+
+               compareResultAsTuples(result, expectedResult);
+       }
 
        @Test
        public void testGetDegrees() throws Exception {
                /*
                 * Test getDegrees()
                 */
-        final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
-
-        Graph<Long, Long, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
-                TestGraphUtils.getLongLongEdgeData(env), env);
-
-        DataSet<Tuple2<Long, LongValue>> data = graph.getDegrees();
-        List<Tuple2<Long, LongValue>> result = data.collect();
-        
-        expectedResult = "1,3\n" +
-                       "2,2\n" +
-                       "3,4\n" +
-                       "4,2\n" +
-                       "5,3\n";
-        
-        compareResultAsTuples(result, expectedResult);
-    }
+               final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
+
+               Graph<Long, Long, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
+                       TestGraphUtils.getLongLongEdgeData(env), env);
+
+               DataSet<Tuple2<Long, LongValue>> data = graph.getDegrees();
+               List<Tuple2<Long, LongValue>> result = data.collect();
+
+               expectedResult = "1,3\n" +
+                       "2,2\n" +
+                       "3,4\n" +
+                       "4,2\n" +
+                       "5,3\n";
+
+               compareResultAsTuples(result, expectedResult);
+       }
 
        @Test
        public void testGetDegreesWithDisconnectedData() throws Exception {
-        /*
+               /*
                 * Test getDegrees() with disconnected data
                 */
-        final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
-
-        Graph<Long, NullValue, Long> graph =
-                
Graph.fromDataSet(TestGraphUtils.getDisconnectedLongLongEdgeData(env), env);
-
-        DataSet<Tuple2<Long, LongValue>> data = graph.outDegrees();
-        List<Tuple2<Long, LongValue>> result = data.collect();
-        
-        expectedResult = "1,2\n" +
-                "2,1\n" +
-                "3,0\n" +
-                "4,1\n" +
-                "5,0\n";
-        
-        compareResultAsTuples(result, expectedResult);
-    }
+               final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
+
+               Graph<Long, NullValue, Long> graph =
+                       
Graph.fromDataSet(TestGraphUtils.getDisconnectedLongLongEdgeData(env), env);
+
+               DataSet<Tuple2<Long, LongValue>> data = graph.outDegrees();
+               List<Tuple2<Long, LongValue>> result = data.collect();
+
+               expectedResult = "1,2\n" +
+                       "2,1\n" +
+                       "3,0\n" +
+                       "4,1\n" +
+                       "5,0\n";
+
+               compareResultAsTuples(result, expectedResult);
+       }
 }
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/flink/blob/cb282067/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/FromCollectionITCase.java
----------------------------------------------------------------------
diff --git 
a/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/FromCollectionITCase.java
 
b/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/FromCollectionITCase.java
index 59f416f..ab2ffe0 100644
--- 
a/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/FromCollectionITCase.java
+++ 
b/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/FromCollectionITCase.java
@@ -36,84 +36,83 @@ import java.util.List;
 @RunWith(Parameterized.class)
 public class FromCollectionITCase extends MultipleProgramsTestBase {
 
-       public FromCollectionITCase(TestExecutionMode mode){
+       public FromCollectionITCase(TestExecutionMode mode) {
                super(mode);
        }
 
-    private String expectedResult;
-
+       private String expectedResult;
 
        @Test
        public void testFromCollectionVerticesEdges() throws Exception {
                /*
                 * Test fromCollection(vertices, edges):
                 */
-        final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
-        Graph<Long, Long, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongVertices(),
-                TestGraphUtils.getLongLongEdges(), env);
-
-        DataSet<Edge<Long, Long>> data = graph.getEdges();
-        List<Edge<Long, Long>> result= data.collect();
-        
-        expectedResult = "1,2,12\n" +
-                       "1,3,13\n" +
-                       "2,3,23\n" +
-                       "3,4,34\n" +
-                       "3,5,35\n" +
-                       "4,5,45\n" +
-                       "5,1,51\n";
-        
-        compareResultAsTuples(result, expectedResult);
-    }
+               final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
+               Graph<Long, Long, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongVertices(),
+                       TestGraphUtils.getLongLongEdges(), env);
+
+               DataSet<Edge<Long, Long>> data = graph.getEdges();
+               List<Edge<Long, Long>> result = data.collect();
+
+               expectedResult = "1,2,12\n" +
+                       "1,3,13\n" +
+                       "2,3,23\n" +
+                       "3,4,34\n" +
+                       "3,5,35\n" +
+                       "4,5,45\n" +
+                       "5,1,51\n";
+
+               compareResultAsTuples(result, expectedResult);
+       }
 
        @Test
        public void testFromCollectionEdgesNoInitialValue() throws Exception {
-        /*
+               /*
          * Test fromCollection(edges) with no initial value for the vertices
          */
-        final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
-        Graph<Long, NullValue, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongEdges(),
-                       env);
-
-        
-        DataSet<Vertex<Long, NullValue>> data = graph.getVertices();
-        List<Vertex<Long, NullValue>> result= data.collect();
-        
-        expectedResult = "1,(null)\n" +
-                       "2,(null)\n" +
-                       "3,(null)\n" +
-                       "4,(null)\n" +
-                       "5,(null)\n";
-        
-        compareResultAsTuples(result, expectedResult);
-    }
+               final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
+               Graph<Long, NullValue, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongEdges(),
+                       env);
+
+
+               DataSet<Vertex<Long, NullValue>> data = graph.getVertices();
+               List<Vertex<Long, NullValue>> result = data.collect();
+
+               expectedResult = "1,(null)\n" +
+                       "2,(null)\n" +
+                       "3,(null)\n" +
+                       "4,(null)\n" +
+                       "5,(null)\n";
+
+               compareResultAsTuples(result, expectedResult);
+       }
 
        @Test
        public void testFromCollectionEdgesWithInitialValue() throws Exception {
-        /*
+               /*
          * Test fromCollection(edges) with vertices initialised by a
          * function that takes the id and doubles it
          */
-        final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
+               final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
                Graph<Long, Long, Long> graph = 
Graph.fromCollection(TestGraphUtils.getLongLongEdges(),
-                new InitVerticesMapper(), env);
-
-        DataSet<Vertex<Long, Long>> data = graph.getVertices();
-        List<Vertex<Long, Long>> result= data.collect();
-        
-        expectedResult = "1,2\n" +
-                       "2,4\n" +
-                       "3,6\n" +
-                       "4,8\n" +
-                       "5,10\n";
-        
-        compareResultAsTuples(result, expectedResult);
-    }
+                       new InitVerticesMapper(), env);
+
+               DataSet<Vertex<Long, Long>> data = graph.getVertices();
+               List<Vertex<Long, Long>> result = data.collect();
+
+               expectedResult = "1,2\n" +
+                       "2,4\n" +
+                       "3,6\n" +
+                       "4,8\n" +
+                       "5,10\n";
+
+               compareResultAsTuples(result, expectedResult);
+       }
 
        @SuppressWarnings("serial")
        private static final class InitVerticesMapper implements 
MapFunction<Long, Long> {
-        public Long map(Long vertexId) {
-            return vertexId * 2;
-        }
+               public Long map(Long vertexId) {
+                       return vertexId * 2;
+               }
        }
 }
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/flink/blob/cb282067/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/GraphCreationITCase.java
----------------------------------------------------------------------
diff --git 
a/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/GraphCreationITCase.java
 
b/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/GraphCreationITCase.java
index 10db9be..77dd4d1 100644
--- 
a/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/GraphCreationITCase.java
+++ 
b/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/GraphCreationITCase.java
@@ -40,51 +40,50 @@ import java.util.List;
 @RunWith(Parameterized.class)
 public class GraphCreationITCase extends MultipleProgramsTestBase {
 
-       public GraphCreationITCase(TestExecutionMode mode){
+       public GraphCreationITCase(TestExecutionMode mode) {
                super(mode);
        }
 
-
-    private String expectedResult;
+       private String expectedResult;
 
        @Test
        public void testCreateWithoutVertexValues() throws Exception {
-       /*
-        * Test create() with edge dataset and no vertex values
-     */
+               /*
+                * Test create() with edge dataset and no vertex values
+            */
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
                Graph<Long, NullValue, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongEdgeData(env), env);
 
-        DataSet<Vertex<Long, NullValue>> data = graph.getVertices();
-        List<Vertex<Long, NullValue>> result= data.collect();
-        
+               DataSet<Vertex<Long, NullValue>> data = graph.getVertices();
+               List<Vertex<Long, NullValue>> result = data.collect();
+
                expectedResult = "1,(null)\n" +
-                                       "2,(null)\n" +
-                                       "3,(null)\n" +
-                                       "4,(null)\n" +
-                                       "5,(null)\n";
-               
+                       "2,(null)\n" +
+                       "3,(null)\n" +
+                       "4,(null)\n" +
+                       "5,(null)\n";
+
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testCreateWithMapper() throws Exception {
-       /*
-        * Test create() with edge dataset and a mapper that assigns the id as 
value
-     */
+               /*
+                * Test create() with edge dataset and a mapper that assigns 
the id as value
+            */
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
                Graph<Long, Long, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongEdgeData(env),
-                               new AssignIdAsValueMapper(), env);
+                       new AssignIdAsValueMapper(), env);
+
+               DataSet<Vertex<Long, Long>> data = graph.getVertices();
+               List<Vertex<Long, Long>> result = data.collect();
 
-        DataSet<Vertex<Long, Long>> data = graph.getVertices();
-        List<Vertex<Long, Long>> result= data.collect();
-        
                expectedResult = "1,1\n" +
-                                       "2,2\n" +
-                                       "3,3\n" +
-                                       "4,4\n" +
-                                       "5,5\n";
-               
+                       "2,2\n" +
+                       "3,3\n" +
+                       "4,4\n" +
+                       "5,5\n";
+
                compareResultAsTuples(result, expectedResult);
        }
 
@@ -95,17 +94,17 @@ public class GraphCreationITCase extends 
MultipleProgramsTestBase {
                 */
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
                Graph<Long, DummyCustomParameterizedType<Double>, Long> graph = 
Graph.fromDataSet(
-                               TestGraphUtils.getLongLongEdgeData(env), new 
AssignCustomVertexValueMapper(), env);
+                       TestGraphUtils.getLongLongEdgeData(env), new 
AssignCustomVertexValueMapper(), env);
+
+               DataSet<Vertex<Long, DummyCustomParameterizedType<Double>>> 
data = graph.getVertices();
+               List<Vertex<Long, DummyCustomParameterizedType<Double>>> result 
= data.collect();
 
-        DataSet<Vertex<Long, DummyCustomParameterizedType<Double>>> data = 
graph.getVertices();
-        List<Vertex<Long, DummyCustomParameterizedType<Double>>> result= 
data.collect();
-        
                expectedResult = "1,(2.0,0)\n" +
-                               "2,(4.0,1)\n" +
-                               "3,(6.0,2)\n" +
-                               "4,(8.0,3)\n" +
-                               "5,(10.0,4)\n";
-               
+                       "2,(4.0,1)\n" +
+                       "3,(6.0,2)\n" +
+                       "4,(8.0,3)\n" +
+                       "5,(10.0,4)\n";
+
                compareResultAsTuples(result, expectedResult);
        }
 
@@ -122,12 +121,12 @@ public class GraphCreationITCase extends 
MultipleProgramsTestBase {
                Boolean valid = graph.validate(new 
InvalidVertexIdsValidator<Long, Long, Long>());
 
                //env.fromElements(result).writeAsText(resultPath);
-               
-               String res= valid.toString();//env.fromElements(valid);
-        List<String> result= new LinkedList<>();
-        result.add(res);
+
+               String res = valid.toString();//env.fromElements(valid);
+               List<String> result = new LinkedList<>();
+               result.add(res);
                expectedResult = "true";
-               
+
                compareResultAsText(result, expectedResult);
        }
 
@@ -142,13 +141,13 @@ public class GraphCreationITCase extends 
MultipleProgramsTestBase {
 
                Graph<Long, Long, Long> graph = Graph.fromDataSet(vertices, 
edges, env);
                Boolean valid = graph.validate(new 
InvalidVertexIdsValidator<Long, Long, Long>());
-               
-               String res= valid.toString();//env.fromElements(valid);
-        List<String> result= new LinkedList<>();
-        result.add(res);
+
+               String res = valid.toString();//env.fromElements(valid);
+               List<String> result = new LinkedList<>();
+               result.add(res);
 
                expectedResult = "false\n";
-               
+
                compareResultAsText(result, expectedResult);
        }
 
@@ -162,18 +161,18 @@ public class GraphCreationITCase extends 
MultipleProgramsTestBase {
 
                Graph<Long, NullValue, NullValue> graph = 
Graph.fromTuple2DataSet(edges, env);
 
-        List<Vertex<Long, NullValue>> result = graph.getVertices().collect();
-        
+               List<Vertex<Long, NullValue>> result = 
graph.getVertices().collect();
+
                expectedResult = "1,(null)\n" +
-                                       "2,(null)\n" +
-                                       "3,(null)\n" +
-                                       "4,(null)\n" +
-                                       "6,(null)\n" +
-                                       "10,(null)\n" +
-                                       "20,(null)\n" +
-                                       "30,(null)\n" +
-                                       "40,(null)\n" +
-                                       "60,(null)\n";
+                       "2,(null)\n" +
+                       "3,(null)\n" +
+                       "4,(null)\n" +
+                       "6,(null)\n" +
+                       "10,(null)\n" +
+                       "20,(null)\n" +
+                       "30,(null)\n" +
+                       "40,(null)\n" +
+                       "60,(null)\n";
 
                compareResultAsTuples(result, expectedResult);
        }
@@ -187,20 +186,20 @@ public class GraphCreationITCase extends 
MultipleProgramsTestBase {
                DataSet<Tuple2<Long, Long>> edges = 
TestGraphUtils.getLongLongTuple2Data(env);
 
                Graph<Long, String, NullValue> graph = 
Graph.fromTuple2DataSet(edges,
-                               new BooMapper(), env);
+                       new BooMapper(), env);
+
+               List<Vertex<Long, String>> result = 
graph.getVertices().collect();
 
-        List<Vertex<Long, String>> result = graph.getVertices().collect();
-        
                expectedResult = "1,boo\n" +
-                                       "2,boo\n" +
-                                       "3,boo\n" +
-                                       "4,boo\n" +
-                                       "6,boo\n" +
-                                       "10,boo\n" +
-                                       "20,boo\n" +
-                                       "30,boo\n" +
-                                       "40,boo\n" +
-                                       "60,boo\n";
+                       "2,boo\n" +
+                       "3,boo\n" +
+                       "4,boo\n" +
+                       "6,boo\n" +
+                       "10,boo\n" +
+                       "20,boo\n" +
+                       "30,boo\n" +
+                       "40,boo\n" +
+                       "60,boo\n";
 
                compareResultAsTuples(result, expectedResult);
        }
@@ -219,14 +218,16 @@ public class GraphCreationITCase extends 
MultipleProgramsTestBase {
                DummyCustomParameterizedType<Double> dummyValue = new 
DummyCustomParameterizedType<>();
 
                public DummyCustomParameterizedType<Double> map(Long vertexId) {
-                       dummyValue.setIntField(vertexId.intValue()-1);
-                       dummyValue.setTField(vertexId*2.0);
+                       dummyValue.setIntField(vertexId.intValue() - 1);
+                       dummyValue.setTField(vertexId * 2.0);
                        return dummyValue;
                }
        }
 
        @SuppressWarnings("serial")
        private static final class BooMapper implements MapFunction<Long, 
String> {
-               public String map(Long value) { return "boo"; }
+               public String map(Long value) {
+                       return "boo";
+               }
        }
 }
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/flink/blob/cb282067/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/GraphCreationWithMapperITCase.java
----------------------------------------------------------------------
diff --git 
a/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/GraphCreationWithMapperITCase.java
 
b/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/GraphCreationWithMapperITCase.java
index f8eb874..148952c 100644
--- 
a/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/GraphCreationWithMapperITCase.java
+++ 
b/flink-libraries/flink-gelly/src/test/java/org/apache/flink/graph/test/operations/GraphCreationWithMapperITCase.java
@@ -36,12 +36,11 @@ import java.util.List;
 @RunWith(Parameterized.class)
 public class GraphCreationWithMapperITCase extends MultipleProgramsTestBase {
 
-       public GraphCreationWithMapperITCase(TestExecutionMode mode){
+       public GraphCreationWithMapperITCase(TestExecutionMode mode) {
                super(mode);
        }
 
-    private String expectedResult;
-
+       private String expectedResult;
 
        @Test
        public void testWithDoubleValueMapper() throws Exception {
@@ -50,17 +49,17 @@ public class GraphCreationWithMapperITCase extends 
MultipleProgramsTestBase {
             */
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
                Graph<Long, Double, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getLongLongEdgeData(env),
-                               new AssignDoubleValueMapper(), env);
+                       new AssignDoubleValueMapper(), env);
+
+               DataSet<Vertex<Long, Double>> data = graph.getVertices();
+               List<Vertex<Long, Double>> result = data.collect();
 
-        DataSet<Vertex<Long, Double>> data = graph.getVertices();
-        List<Vertex<Long, Double>> result= data.collect();
-               
                expectedResult = "1,0.1\n" +
-                               "2,0.1\n" +
-                               "3,0.1\n" +
-                               "4,0.1\n" +
-                               "5,0.1\n";
-               
+                       "2,0.1\n" +
+                       "3,0.1\n" +
+                       "4,0.1\n" +
+                       "5,0.1\n";
+
                compareResultAsTuples(result, expectedResult);
        }
 
@@ -71,39 +70,39 @@ public class GraphCreationWithMapperITCase extends 
MultipleProgramsTestBase {
                 */
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
                Graph<Long, Tuple2<Long, Long>, Long> graph = Graph.fromDataSet(
-                               TestGraphUtils.getLongLongEdgeData(env), new 
AssignTuple2ValueMapper(), env);
+                       TestGraphUtils.getLongLongEdgeData(env), new 
AssignTuple2ValueMapper(), env);
+
+               DataSet<Vertex<Long, Tuple2<Long, Long>>> data = 
graph.getVertices();
+               List<Vertex<Long, Tuple2<Long, Long>>> result = data.collect();
 
-        DataSet<Vertex<Long, Tuple2<Long, Long>>> data = graph.getVertices();
-        List<Vertex<Long, Tuple2<Long, Long>>> result= data.collect();
-        
                expectedResult = "1,(2,42)\n" +
-                               "2,(4,42)\n" +
-                               "3,(6,42)\n" +
-                               "4,(8,42)\n" +
-                               "5,(10,42)\n";
-               
+                       "2,(4,42)\n" +
+                       "3,(6,42)\n" +
+                       "4,(8,42)\n" +
+                       "5,(10,42)\n";
+
                compareResultAsTuples(result, expectedResult);
        }
 
        @Test
        public void testWithConstantValueMapper() throws Exception {
-       /*
-        * Test create() with edge dataset with String key type
-        * and a mapper that assigns a double constant as value
-        */
-       final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
-       Graph<String, Double, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getStringLongEdgeData(env),
+               /*
+                * Test create() with edge dataset with String key type
+                * and a mapper that assigns a double constant as value
+                */
+               final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
+               Graph<String, Double, Long> graph = 
Graph.fromDataSet(TestGraphUtils.getStringLongEdgeData(env),
                        new AssignDoubleConstantMapper(), env);
 
-    DataSet<Vertex<String, Double>> data = graph.getVertices();
-    List<Vertex<String, Double>> result= data.collect();
-    
-       expectedResult = "1,0.1\n" +
+               DataSet<Vertex<String, Double>> data = graph.getVertices();
+               List<Vertex<String, Double>> result = data.collect();
+
+               expectedResult = "1,0.1\n" +
                        "2,0.1\n" +
                        "3,0.1\n" +
                        "4,0.1\n" +
                        "5,0.1\n";
-       
+
                compareResultAsTuples(result, expectedResult);
        }
 
@@ -114,17 +113,17 @@ public class GraphCreationWithMapperITCase extends 
MultipleProgramsTestBase {
                 */
                final ExecutionEnvironment env = 
ExecutionEnvironment.getExecutionEnvironment();
                Graph<Long, DummyCustomType, Long> graph = Graph.fromDataSet(
-                               TestGraphUtils.getLongLongEdgeData(env), new 
AssignCustomValueMapper(), env);
+                       TestGraphUtils.getLongLongEdgeData(env), new 
AssignCustomValueMapper(), env);
+
+               DataSet<Vertex<Long, DummyCustomType>> data = 
graph.getVertices();
+               List<Vertex<Long, DummyCustomType>> result = data.collect();
 
-           DataSet<Vertex<Long, DummyCustomType>> data = graph.getVertices();
-           List<Vertex<Long, DummyCustomType>> result= data.collect();
-           
                expectedResult = "1,(F,0)\n" +
-                               "2,(F,1)\n" +
-                               "3,(F,2)\n" +
-                               "4,(F,3)\n" +
-                               "5,(F,4)\n";
-               
+                       "2,(F,1)\n" +
+                       "3,(F,2)\n" +
+                       "4,(F,3)\n" +
+                       "5,(F,4)\n";
+
                compareResultAsTuples(result, expectedResult);
        }
 
@@ -138,7 +137,7 @@ public class GraphCreationWithMapperITCase extends 
MultipleProgramsTestBase {
        @SuppressWarnings("serial")
        private static final class AssignTuple2ValueMapper implements 
MapFunction<Long, Tuple2<Long, Long>> {
                public Tuple2<Long, Long> map(Long vertexId) {
-                       return new Tuple2<>(vertexId*2, 42L);
+                       return new Tuple2<>(vertexId * 2, 42L);
                }
        }
 
@@ -152,7 +151,7 @@ public class GraphCreationWithMapperITCase extends 
MultipleProgramsTestBase {
        @SuppressWarnings("serial")
        private static final class AssignCustomValueMapper implements 
MapFunction<Long, DummyCustomType> {
                public DummyCustomType map(Long vertexId) {
-                       return new DummyCustomType(vertexId.intValue()-1, 
false);
+                       return new DummyCustomType(vertexId.intValue() - 1, 
false);
                }
        }
 }

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