/*
 * $Id: ActionController.java 54929 2004-10-16 16:38:42Z germuska $ 
 *
 * Copyright 1999-2004 The Apache Software Foundation.
 * 
 * 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.apache.struts.tiles;

import java.io.IOException;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;

/**
 * Struts wrapper implementation of Controller.  This implementation wraps an 
 * <code>Action</code> in a <code>Controller</code>.
 */
public class ActionController implements Controller {

	/** 
	 * Struts action wrapped. 
	 */
	private Action action = null;

	/**
	 * Constructor.
	 * @param action Action to be wrapped.
	 */
	public ActionController(Action action) {
		this.action = action;
	}

	/**
	 * Method associated to a tile and called immediately before tile is 
	 * included.  This implementation calls a Struts Action. No servlet is 
	 * set by this method.
	 *
	 * @param tileContext Current tile context.
	 * @param request Current request.
	 * @param response Current response.
	 * @param servletContext Current servlet context.
	 */
	public void perform(
		ComponentContext tileContext,
		HttpServletRequest request,
		HttpServletResponse response,
		ServletContext servletContext)
		throws ServletException, IOException {

		try {
			action.execute(null, null, request, response);

		} catch (Exception e) {
			throw new ServletException(e);
		}
	}

	/**
	 * @see org.apache.struts.tiles.Controller#execute(org.apache.struts.tiles.ComponentContext, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, javax.servlet.ServletContext)
	 */
	public void execute(
		ComponentContext tileContext,
		HttpServletRequest request,
		HttpServletResponse response,
		ServletContext servletContext)
		throws Exception {
            
		this.action.execute(null, null, request, response);

	}
}