Author: hlship
Date: Wed Jul 7 18:28:31 2010
New Revision: 961467
URL: http://svn.apache.org/viewvc?rev=961467&view=rev
Log:
Add Flow.toSet() to easily convert a Flow into an unmodifiable Set
Added:
tapestry/tapestry5/trunk/tapestry-func/src/test/java/org/apache/tapestry5/func/FlowToSetTests.java
(with props)
Modified:
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/AbstractFlow.java
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/EmptyFlow.java
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/F.java
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/Flow.java
Modified:
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/AbstractFlow.java
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/AbstractFlow.java?rev=961467&r1=961466&r2=961467&view=diff
==============================================================================
---
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/AbstractFlow.java
(original)
+++
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/AbstractFlow.java
Wed Jul 7 18:28:31 2010
@@ -16,11 +16,12 @@ package org.apache.tapestry5.func;
import java.lang.reflect.Array;
import java.util.ArrayList;
-import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
+import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
+import java.util.Set;
/**
* Abstract base class for implementations of {...@link Flow}. Subclasses
typically override some methods
@@ -236,4 +237,13 @@ abstract class AbstractFlow<T> implement
return F.lazy(new LazyDrop<T>(length, this));
}
+ public Set<T> toSet()
+ {
+ Set<T> set = new HashSet<T>();
+
+ each(F.addToCollection(set));
+
+ return Collections.unmodifiableSet(set);
+ }
+
}
Modified:
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/EmptyFlow.java
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/EmptyFlow.java?rev=961467&r1=961466&r2=961467&view=diff
==============================================================================
---
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/EmptyFlow.java
(original)
+++
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/EmptyFlow.java
Wed Jul 7 18:28:31 2010
@@ -17,6 +17,7 @@ package org.apache.tapestry5.func;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
+import java.util.Set;
/**
* An implementation of {...@link Flow} for empty flows. This allows for some
easy optimizations.
@@ -120,4 +121,11 @@ class EmptyFlow<T> extends AbstractFlow<
{
return this;
}
+
+ public Set<T> toSet()
+ {
+ return Collections.emptySet();
+ }
+
+
}
Modified:
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/F.java
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/F.java?rev=961467&r1=961466&r2=961467&view=diff
==============================================================================
---
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/F.java
(original)
+++
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/F.java
Wed Jul 7 18:28:31 2010
@@ -40,6 +40,17 @@ public class F
return (Flow<T>) EMPTY_FLOW;
}
+ public static <T> Predicate<T> eql(final T value)
+ {
+ return new Predicate<T>()
+ {
+ public boolean accept(T object)
+ {
+ return object.equals(value);
+ };
+ };
+ }
+
public static Predicate<Number> eq(final long value)
{
return new Predicate<Number>()
@@ -298,4 +309,15 @@ public class F
}
});
}
+
+ public static <T> Worker<T> addToCollection(final Collection<T> coll)
+ {
+ return new Worker<T>()
+ {
+ public void work(T value)
+ {
+ coll.add(value);
+ }
+ };
+ }
}
Modified:
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/Flow.java
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/Flow.java?rev=961467&r1=961466&r2=961467&view=diff
==============================================================================
---
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/Flow.java
(original)
+++
tapestry/tapestry5/trunk/tapestry-func/src/main/java/org/apache/tapestry5/func/Flow.java
Wed Jul 7 18:28:31 2010
@@ -16,6 +16,7 @@ package org.apache.tapestry5.func;
import java.util.Comparator;
import java.util.List;
+import java.util.Set;
/**
* A Flow is a a functional interface for working with an ordered collection
of values.
@@ -88,6 +89,12 @@ public interface Flow<T> extends Iterabl
List<T> toList();
/**
+ * Converts the Flow into an unmodifiable set of values. This is a
non-lazy operation that will fully realize
+ * the values of the Flow.
+ */
+ Set<T> toSet();
+
+ /**
* Converts the Flow into an array of values (due to type erasure, you
have to remind the Flow about the
* type).
*/
Added:
tapestry/tapestry5/trunk/tapestry-func/src/test/java/org/apache/tapestry5/func/FlowToSetTests.java
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/trunk/tapestry-func/src/test/java/org/apache/tapestry5/func/FlowToSetTests.java?rev=961467&view=auto
==============================================================================
---
tapestry/tapestry5/trunk/tapestry-func/src/test/java/org/apache/tapestry5/func/FlowToSetTests.java
(added)
+++
tapestry/tapestry5/trunk/tapestry-func/src/test/java/org/apache/tapestry5/func/FlowToSetTests.java
Wed Jul 7 18:28:31 2010
@@ -0,0 +1,38 @@
+// Copyright 2010 The Apache Software Foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package org.apache.tapestry5.func;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Set;
+
+import org.testng.annotations.Test;
+
+public class FlowToSetTests extends BaseFuncTest
+{
+ @Test
+ public void empty_flow_to_set()
+ {
+ assertSame(F.emptyFlow().toSet(), Collections.EMPTY_SET);
+ }
+
+ @Test
+ public void nonempty_flow()
+ {
+ Set<Integer> set = F.range(1, 10).filter(evenp).toSet();
+
+ assertTrue(set.containsAll(Arrays.asList(2, 4, 6, 8)));
+ }
+}
Propchange:
tapestry/tapestry5/trunk/tapestry-func/src/test/java/org/apache/tapestry5/func/FlowToSetTests.java
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