/* * Copyright 1999-2011 Alibaba Group. * * 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 com.alibaba.dubbo.common.io; import java.io.IOException; import java.io.Writer; /** * Thread unsafed StringWriter. * * @author qian.lei */ public class UnsafeStringWriter extends Writer { private StringBuilder mBuffer; public UnsafeStringWriter() { lock = mBuffer = new StringBuilder(); } public UnsafeStringWriter(int size) { if( size < 0 ) throw new IllegalArgumentException("Negative buffer size"); lock = mBuffer = new StringBuilder(); } @Override public void write(int c) { mBuffer.append((char)c); } @Override public void write(char[] cs) throws IOException { mBuffer.append(cs, 0, cs.length); } @Override public void write(char[] cs, int off, int len) throws IOException { if( (off < 0) || (off > cs.length) || (len < 0) || ((off + len) > cs.length) || ((off + len) < 0) ) throw new IndexOutOfBoundsException(); if( len > 0 ) mBuffer.append(cs, off, len); } @Override public void write(String str) { mBuffer.append(str); } @Override public void write(String str, int off, int len) { mBuffer.append(str.substring(off, off + len)); } @Override public Writer append(CharSequence csq) { if (csq == null) write("null"); else write(csq.toString()); return this; } @Override public Writer append(CharSequence csq, int start, int end) { CharSequence cs = (csq == null ? "null" : csq); write(cs.subSequence(start, end).toString()); return this; } @Override public Writer append(char c) { mBuffer.append(c); return this; } @Override public void close(){} @Override public void flush(){} @Override public String toString() { return mBuffer.toString(); } }