extscript-root-1.0.4/extscript-core-root/extscript-core/src/main/java/org/apache/myfaces/extensions/scripting/jsf/dynamicDecorators/implementations/NavigationHandlerProxy.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.myfaces.extensions.scripting.jsf.dynamicDecorators.implementations;

import org.apache.myfaces.extensions.scripting.core.api.Decorated;
import org.apache.myfaces.extensions.scripting.core.api.ScriptingConst;
import org.apache.myfaces.extensions.scripting.core.api.WeavingContext;

import javax.faces.application.NavigationHandler;
import javax.faces.context.FacesContext;

/**
 * A reloading navigation handler
 *
 * @author Werner Punz
 */
public class NavigationHandlerProxy extends NavigationHandler implements Decorated
{

    NavigationHandler _delegate;

    private void weaveDelegate() {
        _delegate = (NavigationHandler) WeavingContext.getInstance().reload(_delegate,
                ScriptingConst.ARTIFACT_TYPE_NAVIGATIONHANDLER);
    }

    public NavigationHandlerProxy(NavigationHandler delegate) {
        super();
        _delegate = delegate;
    }

    public void handleNavigation(FacesContext facesContext, String s, String s1) {
        weaveDelegate();
        _delegate.handleNavigation(facesContext, s, s1);
    }

    public Object getDelegate() {
        return _delegate;
    }
}