/*
 * $Id$
 *
 * 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.tiles.freemarker.template;

import java.io.IOException;
import java.util.Map;

import org.apache.tiles.freemarker.context.FreeMarkerUtil;

import freemarker.core.Environment;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateDirectiveModel;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModel;

/**
 * Sets the current container, to be used in Tiles templates. Use the
 * "containerKey" parameter to indicate the name of the container to use.
 *
 * @version $Rev$ $Date$
 * @since 2.2.0
 */
public class SetCurrentContainerFMModel implements TemplateDirectiveModel {

    /** {@inheritDoc} */
    @SuppressWarnings("unchecked")
    public void execute(Environment env, Map params, TemplateModel[] loopVars,
            TemplateDirectiveBody body) throws TemplateException, IOException {
        Map<String, TemplateModel> parms = (Map<String, TemplateModel>) params;
        FreeMarkerUtil.setCurrentContainer(env, FreeMarkerUtil
                .getAsString(parms.get("containerKey")));
    }
}