servletapi/jsr154/src/share/javax/servlet/ServletResponseWrapper.java

/*
* Copyright 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 javax.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Locale;

/**
 * 
 * Provides a convenient implementation of the ServletResponse interface that
 * can be subclassed by developers wishing to adapt the response from a Servlet.
 * This class implements the Wrapper or Decorator pattern. Methods default to
 * calling through to the wrapped response object.
 * 
 * @author 	Various
 * @version 	$Version$
 * @since	v 2.3
 *
 * @see 	javax.servlet.ServletResponse
 *
 */

 
public class ServletResponseWrapper implements ServletResponse {
	private ServletResponse response;
	/**
	* Creates a ServletResponse adaptor wrapping the given response object.
	* @throws java.lang.IllegalArgumentException if the response is null.
	*/


	public ServletResponseWrapper(ServletResponse response) {
	    if (response == null) {
		throw new IllegalArgumentException("Response cannot be null");
	    }
	    this.response = response;
	}

	/**
	* Return the wrapped ServletResponse object.
	*/

	public ServletResponse getResponse() {
		return this.response;
	}	
	
	
	/**
	* Sets the response being wrapped. 
	* @throws java.lang.IllegalArgumentException if the response is null.
	*/
	
	public void setResponse(ServletResponse response) {
	    if (response == null) {
		throw new IllegalArgumentException("Response cannot be null");
	    }
	    this.response = response;
	}

    /**
     * The default behavior of this method is to call setCharacterEncoding(String charset)
     * on the wrapped response object.
     *
     * @since 2.4
     */

    public void setCharacterEncoding(String charset) {
	this.response.setCharacterEncoding(charset);
    }

    /**
     * The default behavior of this method is to return getCharacterEncoding()
     * on the wrapped response object.
     */

    public String getCharacterEncoding() {
	return this.response.getCharacterEncoding();
	}
    
    
	  /**
     * The default behavior of this method is to return getOutputStream()
     * on the wrapped response object.
     */

    public ServletOutputStream getOutputStream() throws IOException {
	return this.response.getOutputStream();
    }  
      
     /**
     * The default behavior of this method is to return getWriter()
     * on the wrapped response object.
     */


    public PrintWriter getWriter() throws IOException {
	return this.response.getWriter();
	}
    
    /**
     * The default behavior of this method is to call setContentLength(int len)
     * on the wrapped response object.
     */

    public void setContentLength(int len) {
	this.response.setContentLength(len);
    }
    
    /**
     * The default behavior of this method is to call setContentType(String type)
     * on the wrapped response object.
     */

    public void setContentType(String type) {
	this.response.setContentType(type);
    }

    /**
     * The default behavior of this method is to return getContentType()
     * on the wrapped response object.
     *
     * @since 2.4
     */

    public String getContentType() {
	return this.response.getContentType();
    }
    
    /**
     * The default behavior of this method is to call setBufferSize(int size)
     * on the wrapped response object.
     */
    public void setBufferSize(int size) {
	this.response.setBufferSize(size);
    }
    
    /**
     * The default behavior of this method is to return getBufferSize()
     * on the wrapped response object.
     */
    public int getBufferSize() {
	return this.response.getBufferSize();
    }

    /**
     * The default behavior of this method is to call flushBuffer()
     * on the wrapped response object.
     */

    public void flushBuffer() throws IOException {
	this.response.flushBuffer();
    }
    
    /**
     * The default behavior of this method is to return isCommitted()
     * on the wrapped response object.
     */
    public boolean isCommitted() {
	return this.response.isCommitted();
    }

    /**
     * The default behavior of this method is to call reset()
     * on the wrapped response object.
     */

    public void reset() {
	this.response.reset();
    }
    
    /**
     * The default behavior of this method is to call resetBuffer()
     * on the wrapped response object.
     */
     
    public void resetBuffer() {
	this.response.resetBuffer();
    }
    
    /**
     * The default behavior of this method is to call setLocale(Locale loc)
     * on the wrapped response object.
     */

    public void setLocale(Locale loc) {
	this.response.setLocale(loc);
    }
    
    /**
     * The default behavior of this method is to return getLocale()
     * on the wrapped response object.
     */
    public Locale getLocale() {
	return this.response.getLocale();
    }


}