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[utils] / wicket / components / src / main / java / org / wamblee / wicket / page / PageBehavior.java

diff --git a/wicket/components/src/main/java/org/wamblee/wicket/page/PageBehavior.java b/wicket/components/src/main/java/org/wamblee/wicket/page/PageBehavior.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.page;
+
+import java.io.Serializable;
+
+import org.apache.wicket.markup.html.WebPage;
+import org.apache.wicket.protocol.http.WebResponse;
+
+/**
+ * Page behavior interface. This provides a mechanism to extend page behavior
+ * without subclassing.
+ * 
+ * @author Erik Brakkee
+ */
+public interface PageBehavior extends Serializable {
+
+    /**
+     * To be called as part of the Page's <code>onBeforeRender</code>
+     * 
+     * @param aPage
+     *            Page this is called for.
+     */
+    void onBeforeRender(WebPage aPage);
+
+    /**
+     * To be called as part of the Page's <code>setHeaders</code>
+     * 
+     * @param aPage
+     *            Page this is called for.
+     * @param aResponse
+     *            Response to set headers for.
+     */
+    void setHeaders(WebPage aPage, WebResponse aResponse);
+
+    /**
+     * To be called as part of the Page's <code>onAfterRender</code>
+     * 
+     * @param aPage
+     *            Page this is called for.
+     */
+    void onAfterRender(WebPage aPage);
+}