Struts example source code file (ServletResponseWrapperInclude.java)

This example Struts source code file (ServletResponseWrapperInclude.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Struts tags/keywords

http, httpservletresponsewrapper, illegalstateexception, io, ioexception, ioexception, jspwriter, jspwriter, printwriter, printwriter, request, response, servlet, servletoutputstream, servletresponsewrapperinclude, servletresponsewrapperinclude

The Struts ServletResponseWrapperInclude.java source code

/*
 * 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.jasper.runtime;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletOutputStream;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
import javax.servlet.jsp.JspWriter;

/**
 * ServletResponseWrapper used by the JSP 'include' action.
 *
 * This wrapper response object is passed to RequestDispatcher.include(), so
 * that the output of the included resource is appended to that of the
 * including page.
 *
 * @author Pierre Delisle
 */

public class ServletResponseWrapperInclude extends HttpServletResponseWrapper {

    /**
     * PrintWriter which appends to the JspWriter of the including page.
     */
    private PrintWriter printWriter;

    private JspWriter jspWriter;

    public ServletResponseWrapperInclude(ServletResponse response, 
					 JspWriter jspWriter) {
	super((HttpServletResponse)response);
	this.printWriter = new PrintWriter(jspWriter);
	this.jspWriter = jspWriter;
    }

    /**
     * Returns a wrapper around the JspWriter of the including page.
     */
    public PrintWriter getWriter() throws IOException {
	return printWriter;
    }

    public ServletOutputStream getOutputStream() throws IOException {
	throw new IllegalStateException();
    }

    /**
     * Clears the output buffer of the JspWriter associated with the including
     * page.
     */
    public void resetBuffer() {
	try {
	    jspWriter.clearBuffer();
	} catch (IOException ioe) {
	}
    }
}