package org.apache.turbine.services.jsp;

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache Turbine" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    "Apache Turbine", nor may "Apache" appear in their name, without
 *    prior written permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import org.apache.turbine.pipeline.PipelineData;
import org.apache.turbine.services.TurbineServices;

import org.apache.turbine.util.RunData;
import org.apache.turbine.util.TurbineException;

/**
 * Facade class for the Jsp Service.
 *
 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
 * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
 */
public abstract class TurbineJsp
{
    /**
     * Utility method for accessing the service
     * implementation
     *
     * @return a JspService implementation instance
     */
    protected static JspService getService()
    {
        return (JspService) TurbineServices
            .getInstance().getService(JspService.SERVICE_NAME);
    }

    /**
     * Adds some convenience objects to the request.  For example an instance
     * of JspLink which can be used to generate links to other templates.
     *
     * @deprecated Use the PipelineData version.
     * @param data the turbine rundata object
     */
    public static void addDefaultObjects(RunData data)
    {
        getService().addDefaultObjects(data);
    }

    
    /**
     * Adds some convenience objects to the request.  For example an instance
     * of JspLink which can be used to generate links to other templates.
     *
     * @param data the turbine pipelinedData object
     */
    public static void addDefaultObjects(PipelineData pipelineData)
    {
        //Map runDataMap = (Map) pipelineData.get(RunData.class);
        //RunData data = (RunData)runDataMap.get(RunData.class);
        RunData runData = (RunData)pipelineData;
        addDefaultObjects(runData);
    }

    /**
     * executes the JSP given by templateName.
     *
     * @deprecated Use the PipelineData version.
     * @param data A RunData Object
     * @param templateName The template to execute
     * @param isForward whether to perform a forward or include.
     *
     * @throws TurbineException If a problem occured while executing the JSP
     */
    public static void handleRequest(RunData data, String templateName, boolean isForward)
        throws TurbineException
    {
        getService().handleRequest(data, templateName, isForward);
    }

    /**
     * executes the JSP given by templateName.
     *
     * @deprecated Use the PipelineData version.
     * @param data A RunData Object
     * @param templateName The template to execute
     *
     * @throws TurbineException If a problem occured while executing the JSP
     */
    public static void handleRequest(RunData data, String templateName)
        throws TurbineException
    {
        getService().handleRequest(data, templateName);
    }

    /**
     * executes the JSP given by templateName.
     *
     * @param data A RunData Object
     * @param templateName The template to execute
     * @param isForward whether to perform a forward or include.
     *
     * @throws TurbineException If a problem occured while executing the JSP
     */
    public static void handleRequest(PipelineData pipelineData, String templateName, boolean isForward)
        throws TurbineException
    {
        //Map runDataMap = (Map) pipelineData.get(RunData.class);
        //RunData data = (RunData)runDataMap.get(RunData.class);
        RunData runData = (RunData)pipelineData;
        handleRequest(runData, templateName, isForward);
    }

    /**
     * executes the JSP given by templateName.
     *
     * @param data A RunData Object
     * @param templateName The template to execute
     *
     * @throws TurbineException If a problem occured while executing the JSP
     */
    public static void handleRequest(PipelineData pipelineData, String templateName)
        throws TurbineException
    {
        if(!(pipelineData instanceof RunData)){
            throw new RuntimeException("Can't cast to rundata from pipeline data.");
        }
        handleRequest((RunData)pipelineData, templateName);
    }

    
    /**
     * Returns the default buffer size of the JspService
     *
     * @return The default buffer size.
     */
    public static int getDefaultBufferSize()
    {
        return getService().getDefaultBufferSize();
    }

    /**
     * Searchs for a template in the default.template path[s] and
     * returns the template name with a relative path which is required
     * by <a href="http://java.sun.com/products/servlet/2.3/javadoc/javax/servlet/ServletContext.html#getRequestDispatcher(java.lang.String)">javax.servlet.RequestDispatcher</a>
     *
     * @param template The name of the template to search for.
     *
     * @return the template with a relative path
     */
    public static String getRelativeTemplateName(String template)
    {
        return getService().getRelativeTemplateName(template);
    }
}