001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.wicket.response; 018 019import org.apache.wicket.request.Response; 020 021 022/** 023 * Response implementation that discards all output. 024 * 025 * @author Jonathan Locke 026 */ 027public class NullResponse extends Response 028{ 029 /** The one and only instance of NullResponse */ 030 private static final NullResponse instance = new NullResponse(); 031 032 /** 033 * Private constructor to force use of static factory method. 034 */ 035 private NullResponse() 036 { 037 } 038 039 /** 040 * @return The one and only instance of NullResponse 041 */ 042 public static NullResponse getInstance() 043 { 044 return instance; 045 } 046 047 /** 048 * @see org.apache.wicket.request.Response#write(CharSequence) 049 */ 050 @Override 051 public void write(CharSequence string) 052 { 053 // Does nothing 054 } 055 056 @Override 057 public void write(byte[] array) 058 { 059 } 060 061 @Override 062 public void write(byte[] array, int offset, int length) 063 { 064 } 065 066 @Override 067 public String encodeURL(CharSequence url) 068 { 069 return url != null ? url.toString() : null; 070 } 071 072 @Override 073 public Object getContainerResponse() 074 { 075 return null; 076 } 077}