001/* 002 * Copyright 2002-2012 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.mock.web; 018 019import java.io.IOException; 020import java.io.OutputStream; 021import javax.servlet.ServletOutputStream; 022 023import org.springframework.util.Assert; 024 025/** 026 * Delegating implementation of {@link javax.servlet.ServletOutputStream}. 027 * 028 * <p>Used by {@link MockHttpServletResponse}; typically not directly 029 * used for testing application controllers. 030 * 031 * @author Juergen Hoeller 032 * @since 1.0.2 033 * @see MockHttpServletResponse 034 */ 035public class DelegatingServletOutputStream extends ServletOutputStream { 036 037 private final OutputStream targetStream; 038 039 040 /** 041 * Create a DelegatingServletOutputStream for the given target stream. 042 * @param targetStream the target stream (never {@code null}) 043 */ 044 public DelegatingServletOutputStream(OutputStream targetStream) { 045 Assert.notNull(targetStream, "Target OutputStream must not be null"); 046 this.targetStream = targetStream; 047 } 048 049 /** 050 * Return the underlying target stream (never {@code null}). 051 */ 052 public final OutputStream getTargetStream() { 053 return this.targetStream; 054 } 055 056 057 @Override 058 public void write(int b) throws IOException { 059 this.targetStream.write(b); 060 } 061 062 @Override 063 public void flush() throws IOException { 064 super.flush(); 065 this.targetStream.flush(); 066 } 067 068 @Override 069 public void close() throws IOException { 070 super.close(); 071 this.targetStream.close(); 072 } 073 074}