X-Git-Url: http://wamblee.org/gitweb/?a=blobdiff_plain;f=system%2Fgeneral%2Fsrc%2Fmain%2Fjava%2Forg%2Fwamblee%2Fsystem%2Fgraph%2FEdgeSelector.java;fp=system%2Fgeneral%2Fsrc%2Fmain%2Fjava%2Forg%2Fwamblee%2Fsystem%2Fgraph%2FEdgeSelector.java;h=c49f82c13dc32fa0a99aed90a9a0e48f891356c6;hb=102eebeba2200f9bb2d8523bdfe7ace4ff663628;hp=0000000000000000000000000000000000000000;hpb=531559394b56b0dbf817d52c8c596216550a5cbb;p=utils

diff --git a/system/general/src/main/java/org/wamblee/system/graph/EdgeSelector.java b/system/general/src/main/java/org/wamblee/system/graph/EdgeSelector.java
new file mode 100644
index 00000000..c49f82c1
--- /dev/null
+++ b/system/general/src/main/java/org/wamblee/system/graph/EdgeSelector.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2008 the original author or authors.
+ * 
+ * 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.wamblee.system.graph;
+
+public class EdgeSelector<FromType extends Node, ToType extends Node> {
+    
+    public static interface Selector<FromType extends Node, ToType extends Node> { 
+        void execute(FromType aFrom, ToType aTo);
+    }
+    
+    private Class<FromType> _fromType; 
+    private Class<ToType> _toType;
+    
+    public EdgeSelector(Class<FromType> aFrom, Class<ToType> aTo) {
+        _fromType = aFrom; 
+        _toType = aTo;
+    }
+
+    public void execute(Selector<FromType,ToType> aSelector, Edge aEdge) { 
+        if ( _fromType.isInstance(aEdge.getFrom()) && _toType.isInstance(aEdge.getTo())) { 
+            aSelector.execute((FromType)aEdge.getFrom(), (ToType)aEdge.getTo());
+        }    
+    }
+}