Initial opendaylight infrastructure commit!!

[controller.git] / third-party / net.sf.jung2 / src / main / java / edu / uci / ics / jung / algorithms / scoring / util / DelegateToEdgeTransformer.java

diff --git a/third-party/net.sf.jung2/src/main/java/edu/uci/ics/jung/algorithms/scoring/util/DelegateToEdgeTransformer.java b/third-party/net.sf.jung2/src/main/java/edu/uci/ics/jung/algorithms/scoring/util/DelegateToEdgeTransformer.java
new file mode 100644 (file)
index 0000000..f836a9b
--- /dev/null
+++ b/third-party/net.sf.jung2/src/main/java/edu/uci/ics/jung/algorithms/scoring/util/DelegateToEdgeTransformer.java
@@ -0,0 +1,48 @@
+/*
+ * Created on Jul 11, 2008
+ *
+ * Copyright (c) 2008, the JUNG Project and the Regents of the University 
+ * of California
+ * All rights reserved.
+ *
+ * This software is open-source under the BSD license; see either
+ * "license.txt" or
+ * http://jung.sourceforge.net/license.txt for a description.
+ */
+package edu.uci.ics.jung.algorithms.scoring.util;
+
+import org.apache.commons.collections15.Transformer;
+
+/**
+ * A <code>Transformer<VEPair,Number></code> that delegates its operation to a
+ * <code>Transformer<E,Number></code>.  Mainly useful for technical reasons inside 
+ * AbstractIterativeScorer; in essence it allows the edge weight instance 
+ * variable to be of type <code>VEPair,W</code> even if the edge weight 
+ * <code>Transformer</code> only operates on edges.
+ */
+public class DelegateToEdgeTransformer<V,E> implements
+        Transformer<VEPair<V,E>,Number>
+{
+       /**
+        * The transformer to which this instance delegates its function.
+        */
+    protected Transformer<E,? extends Number> delegate;
+    
+    /**
+     * Creates an instance with the specified delegate transformer.
+     * @param delegate the Transformer to which this instance will delegate
+     */
+    public DelegateToEdgeTransformer(Transformer<E,? extends Number> delegate)
+    {
+        this.delegate = delegate;
+    }
+    
+    /**
+     * @see Transformer#transform(Object)
+     */
+    public Number transform(VEPair<V,E> arg0)
+    {
+        return delegate.transform(arg0.getE());
+    }
+
+}