/*
 * $Id: NoneDecoratorMapper.java 651946 2008-04-27 13:41:38Z apetrelli $
 *
 * 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.struts2.sitemesh;

import com.opensymphony.module.sitemesh.mapper.AbstractDecoratorMapper;
import com.opensymphony.module.sitemesh.Decorator;
import com.opensymphony.module.sitemesh.Page;
import com.opensymphony.module.sitemesh.DecoratorMapper;
import com.opensymphony.sitemesh.DecoratorSelector;
import com.opensymphony.sitemesh.Content;
import com.opensymphony.sitemesh.SiteMeshContext;
import com.opensymphony.sitemesh.compatability.Content2HTMLPage;
import com.opensymphony.sitemesh.compatability.OldDecorator2NewDecorator;
import com.opensymphony.sitemesh.webapp.SiteMeshWebAppContext;
import com.opensymphony.sitemesh.webapp.decorator.NoDecorator;

import javax.servlet.http.HttpServletRequest;

/**
 * Returns a {@link OldDecorator2NewStrutsVelocityDecorator} decorator
 * for a velocity request.
 * 
 * Won't decorate the output if it finds a "decorator" flag in the request
 */
public class VelocityMapper2DecoratorSelector implements DecoratorSelector {

    private final DecoratorMapper decoratorMapper;

    public VelocityMapper2DecoratorSelector(DecoratorMapper decoratorMapper) {
        this.decoratorMapper = decoratorMapper;
    }

    public com.opensymphony.sitemesh.Decorator selectDecorator(Content content, SiteMeshContext context) {
        SiteMeshWebAppContext webAppContext = (SiteMeshWebAppContext) context;
        HttpServletRequest request = webAppContext.getRequest();
        Decorator decorator =
                decoratorMapper.getDecorator(request, new Content2HTMLPage(content, request));
        if (decorator == null || decorator.getPage() == null) {
            return new NoDecorator();
        } else {
            return new OldDecorator2NewStrutsVelocityDecorator(decorator);
        }
    }
}