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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.xml.security.utils;
import java.io.IOException;
import java.io.OutputStream;
/**
* A class that buffers without synchronizing its methods
* @author raul
*/
public class UnsyncBufferedOutputStream extends OutputStream {
static final int size = 8*1024;
private int pointer = 0;
private final OutputStream out;
private final byte[] buf;
/**
* Creates a buffered output stream without synchronization
* @param out the outputstream to buffer
*/
public UnsyncBufferedOutputStream(OutputStream out) {
buf = new byte[size];
this.out = out;
}
/** @inheritDoc */
public void write(byte[] arg0) throws IOException {
write(arg0, 0, arg0.length);
}
/** @inheritDoc */
public void write(byte[] arg0, int arg1, int len) throws IOException {
int newLen = pointer+len;
if (newLen > size) {
flushBuffer();
if (len > size) {
out.write(arg0, arg1,len);
return;
}
newLen = len;
}
System.arraycopy(arg0, arg1, buf, pointer, len);
pointer = newLen;
}
private void flushBuffer() throws IOException {
if (pointer > 0) {
out.write(buf, 0, pointer);
}
pointer = 0;
}
/** @inheritDoc */
public void write(int arg0) throws IOException {
if (pointer >= size) {
flushBuffer();
}
buf[pointer++] = (byte)arg0;
}
/** @inheritDoc */
public void flush() throws IOException {
flushBuffer();
out.flush();
}
/** @inheritDoc */
public void close() throws IOException {
flush();
out.close();
}
}