Adding method impls to DatasetLib

Project: http://git-wip-us.apache.org/repos/asf/jena/repo
Commit: http://git-wip-us.apache.org/repos/asf/jena/commit/d967c1ef
Tree: http://git-wip-us.apache.org/repos/asf/jena/tree/d967c1ef
Diff: http://git-wip-us.apache.org/repos/asf/jena/diff/d967c1ef

Branch: refs/heads/master
Commit: d967c1efca1a2d1a5854804b17699fe3d5108c4c
Parents: ad3bcaa
Author: ajs6f <[email protected]>
Authored: Fri Nov 3 15:25:04 2017 -0400
Committer: ajs6f <[email protected]>
Committed: Fri Jan 5 09:26:07 2018 -0500

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 .../org/apache/jena/query/util/DatasetLib.java  | 34 +++++++++++++-------
 1 file changed, 22 insertions(+), 12 deletions(-)
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http://git-wip-us.apache.org/repos/asf/jena/blob/d967c1ef/jena-arq/src/main/java/org/apache/jena/query/util/DatasetLib.java
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diff --git a/jena-arq/src/main/java/org/apache/jena/query/util/DatasetLib.java 
b/jena-arq/src/main/java/org/apache/jena/query/util/DatasetLib.java
index 8d1d789..9501375 100644
--- a/jena-arq/src/main/java/org/apache/jena/query/util/DatasetLib.java
+++ b/jena-arq/src/main/java/org/apache/jena/query/util/DatasetLib.java
@@ -1,21 +1,31 @@
 package org.apache.jena.query.util;
 
 import org.apache.jena.query.Dataset;
+import org.apache.jena.query.DatasetFactory;
+import org.apache.jena.sparql.util.Context;
+import org.apache.jena.sparql.util.DifferenceDatasetGraph;
+import org.apache.jena.sparql.util.UnionDatasetGraph;
 
 public class DatasetLib {
 
-    public static Dataset union(final Dataset d1, final Dataset d2) {
-        // TODO
-        throw new UnsupportedOperationException();
-    }
+       public static Dataset union(final Dataset d1, final Dataset d2) {
+               return DatasetFactory.wrap(new 
UnionDatasetGraph(d1.asDatasetGraph(), d2.asDatasetGraph()));
+       }
 
-    public static Dataset intersection(final Dataset d1, final Dataset d2) {
-        // TODO
-        throw new UnsupportedOperationException();
-    }
+       public static Dataset union(final Dataset d1, final Dataset d2, Context 
c) {
+               return DatasetFactory.wrap(new 
UnionDatasetGraph(d1.asDatasetGraph(), d2.asDatasetGraph(), c));
+       }
 
-    public static Dataset difference(final Dataset d1, final Dataset d2) {
-        // TODO
-        throw new UnsupportedOperationException();
-    }
+       public static Dataset intersection(final Dataset d1, final Dataset d2) {
+               // TODO
+               throw new UnsupportedOperationException();
+       }
+
+       public static Dataset difference(final Dataset d1, final Dataset d2) {
+               return DatasetFactory.wrap(new 
DifferenceDatasetGraph(d1.asDatasetGraph(), d2.asDatasetGraph()));
+       }
+
+       public static Dataset difference(final Dataset d1, final Dataset d2, 
Context c) {
+               return DatasetFactory.wrap(new 
DifferenceDatasetGraph(d1.asDatasetGraph(), d2.asDatasetGraph(), c));
+       }
 }

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