/*
 * 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.mojarra.facelet;

import com.sun.faces.facelets.tag.jsf.BehaviorTagHandlerDelegateImpl;
import org.apache.myfaces.extensions.scripting.core.api.ScriptingConst;
import org.apache.myfaces.extensions.scripting.core.api.WeavingContext;

import javax.faces.component.UIComponent;
import javax.faces.view.facelets.BehaviorHandler;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.MetaRuleset;
import javax.faces.view.facelets.TagHandlerDelegate;
import java.io.IOException;

/**
 * Behavior Tag Handler which introduces reloading behavior
 *
 * @author Werner Punz (latest modification by $Author$)
 * @version $Revision$ $Date$
 */

public class ReloadingBehaviorTagHandlerDelegate extends TagHandlerDelegate {

    BehaviorHandler _owner;
    TagHandlerDelegate _delegate;

    public ReloadingBehaviorTagHandlerDelegate(BehaviorHandler owner) {
        applyOwner(owner);
    }

    private void applyOwner(BehaviorHandler owner) {
        _owner = owner;
        _delegate = new BehaviorTagHandlerDelegateImpl(_owner);
    }

    @Override
    public void apply(FaceletContext ctx, UIComponent comp) throws IOException {
        if (WeavingContext.getInstance().isDynamic(_owner.getClass())) {
            BehaviorHandler newOwner = (BehaviorHandler) WeavingContext.getInstance().reload(_owner,
                    ScriptingConst.ARTIFACT_TYPE_BEHAVIOR_HANDLER);
            if (!newOwner.getClass().equals(_owner.getClass())) {
                applyOwner(newOwner);
            }
        }
        _owner.apply(ctx, comp);
    }

    @Override
    public MetaRuleset createMetaRuleset(Class type) {
        return _delegate.createMetaRuleset(type);
    }

}