| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 1999-2010 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 com.sun.org.apache.xml.internal.security.utils; |
| |
| import java.io.OutputStream; |
| |
| /** |
| * A simple Unsynced ByteArrayOutputStream |
| * @author raul |
| * |
| */ |
| public class UnsyncByteArrayOutputStream extends OutputStream { |
| private static final int INITIAL_SIZE = 8192; |
| private static ThreadLocal bufCache = new ThreadLocal() { |
| protected synchronized Object initialValue() { |
| return new byte[INITIAL_SIZE]; |
| } |
| }; |
| |
| private byte[] buf; |
| private int size = INITIAL_SIZE; |
| private int pos = 0; |
| |
| public UnsyncByteArrayOutputStream() { |
| buf = (byte[])bufCache.get(); |
| } |
| |
| public void write(byte[] arg0) { |
| int newPos = pos + arg0.length; |
| if (newPos > size) { |
| expandSize(newPos); |
| } |
| System.arraycopy(arg0, 0, buf, pos, arg0.length); |
| pos = newPos; |
| } |
| |
| public void write(byte[] arg0, int arg1, int arg2) { |
| int newPos = pos + arg2; |
| if (newPos > size) { |
| expandSize(newPos); |
| } |
| System.arraycopy(arg0, arg1, buf, pos, arg2); |
| pos = newPos; |
| } |
| |
| public void write(int arg0) { |
| int newPos = pos + 1; |
| if (newPos > size) { |
| expandSize(newPos); |
| } |
| buf[pos++] = (byte)arg0; |
| } |
| |
| public byte[] toByteArray() { |
| byte result[] = new byte[pos]; |
| System.arraycopy(buf, 0, result, 0, pos); |
| return result; |
| } |
| |
| public void reset() { |
| pos = 0; |
| } |
| |
| private void expandSize(int newPos) { |
| int newSize = size; |
| while (newPos > newSize) { |
| newSize = newSize<<2; |
| } |
| byte newBuf[] = new byte[newSize]; |
| System.arraycopy(buf, 0, newBuf, 0, pos); |
| buf = newBuf; |
| size = newSize; |
| } |
| } |