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.util; 018 019import java.io.Writer; 020 021import org.apache.commons.logging.Log; 022 023/** 024 * {@code java.io.Writer} adapter for a Commons Logging {@code Log}. 025 * 026 * @author Juergen Hoeller 027 * @since 2.5.1 028 */ 029public class CommonsLogWriter extends Writer { 030 031 private final Log logger; 032 033 private final StringBuilder buffer = new StringBuilder(); 034 035 036 /** 037 * Create a new CommonsLogWriter for the given Commons Logging logger. 038 * @param logger the Commons Logging logger to write to 039 */ 040 public CommonsLogWriter(Log logger) { 041 Assert.notNull(logger, "Logger must not be null"); 042 this.logger = logger; 043 } 044 045 046 public void write(char ch) { 047 if (ch == '\n' && this.buffer.length() > 0) { 048 this.logger.debug(this.buffer.toString()); 049 this.buffer.setLength(0); 050 } 051 else { 052 this.buffer.append(ch); 053 } 054 } 055 056 @Override 057 public void write(char[] buffer, int offset, int length) { 058 for (int i = 0; i < length; i++) { 059 char ch = buffer[offset + i]; 060 if (ch == '\n' && this.buffer.length() > 0) { 061 this.logger.debug(this.buffer.toString()); 062 this.buffer.setLength(0); 063 } 064 else { 065 this.buffer.append(ch); 066 } 067 } 068 } 069 070 @Override 071 public void flush() { 072 } 073 074 @Override 075 public void close() { 076 } 077 078}