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[utils] / wicket / components / src / main / java / org / wamblee / wicket / behavior / CompositePageBehavior.java

diff --git a/wicket/components/src/main/java/org/wamblee/wicket/behavior/CompositePageBehavior.java b/wicket/components/src/main/java/org/wamblee/wicket/behavior/CompositePageBehavior.java
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+/*
+ * Copyright 2005-2010 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.wicket.behavior;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.wicket.markup.html.WebPage;
+import org.apache.wicket.protocol.http.WebResponse;
+
+/**
+ * Implements a composite page behavior which invokes all behaviors in the order they were
+ * added. 
+ * 
+ * To use this in an arbitrary page, override <code>onBeforeRender()</code>, 
+ * <code>setHeaders()</code> and <code>onAfterRender</code> in the page and delegate to the 
+ * corresponding methods in this class.  
+ * 
+ * @author Erik Brakkee
+ */
+public class CompositePageBehavior implements PageBehavior {
+
+    private List<PageBehavior> behaviors; 
+    
+    /**
+     * Constructs the compositie.
+     */
+    public CompositePageBehavior() { 
+        behaviors = new ArrayList<PageBehavior>();
+    }
+    
+    /**
+     * Adds a behavior. 
+     * @param aBehavior Behavior 
+     */
+    public void add(PageBehavior aBehavior) { 
+        behaviors.add(aBehavior);
+    }
+    
+    @Override
+    public void onAfterRender(WebPage aPage) {
+        for (PageBehavior behavior: behaviors) { 
+            behavior.onAfterRender(aPage);
+        }
+    }
+
+    @Override
+    public void onBeforeRender(WebPage aPage) {
+        for (PageBehavior behavior: behaviors) { 
+            behavior.onBeforeRender(aPage);
+        }
+    }
+
+    @Override
+    public void setHeaders(WebPage aPage, WebResponse aResponse) {
+        for (PageBehavior behavior: behaviors) { 
+            behavior.setHeaders(aPage, aResponse);
+        }
+    }
+
+}