/*
* Copyright (C) 2014 Indeed Inc.
*
* 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.indeed.imhotep.io;
import java.io.IOException;
import java.io.OutputStream;
/**
* @author jsgroth
*/
public final class SubOutputStream extends OutputStream {
private static final int BLOCK_SIZE = 65536;
private final OutputStream os;
private final byte[] bytes;
private int currentBlockSize;
public SubOutputStream(OutputStream os) {
this.os = os;
bytes = new byte[BLOCK_SIZE];
}
@Override
public void write(int b) throws IOException {
bytes[currentBlockSize++] = (byte)b;
if (currentBlockSize == BLOCK_SIZE) {
writeBlock();
}
}
private void writeBlock() throws IOException {
Streams.writeInt(os, currentBlockSize);
os.write(bytes, 0, currentBlockSize);
currentBlockSize = 0;
}
// note that this method does NOT close the underlying OutputStream
@Override
public void close() throws IOException {
if (currentBlockSize > 0) {
writeBlock();
}
Streams.writeInt(os, 0);
os.flush();
}
}