servletresponsewrapperinclude.java

JspRuntime自动填充机制；向对jsp深入了解的可以

/*
 * $Header: /home/cvs/jakarta-tomcat-jasper/jasper2/src/share/org/apache/jasper/runtime/ServletResponseWrapperInclude.java,v 1.1.1.1 2002/03/28 18:46:20 kinman Exp $
 * $Revision: 1.1.1.1 $
 * $Date: 2002/03/28 18:46:20 $
 *
 * ====================================================================
 * 
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 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.
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 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:  
 *       "This product includes software developed by the 
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
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package studio.beansoft.jasper.runtime;

import java.lang.IllegalStateException;
import java.io.PrintWriter;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;

/**
 * ServletResponseWrapper used for the JSP 'include' action.
 *
 * This 'wrapped' response object is passed as the second argument 
 * to the internal RequestDispatcher.include(). It channels
 * all output text into the current JspWriter.
 *
 * @author Pierre Delisle
 */

public class ServletResponseWrapperInclude
    extends HttpServletResponseWrapper
{
    /**
     * The PrintWriter writes all output to the JspWriter of the 
     * including page.
     */
    PrintWriter printWriter;

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

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

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