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//
// MessagePack for Java
//
// Copyright (C) 2009-2011 FURUHASHI Sadayuki
//
// 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 org.msgpack.io;
import java.io.IOException;
import java.nio.ByteBuffer;
abstract class BufferedOutput implements Output {
protected byte[] buffer;
protected int filled;
protected final int bufferSize;
protected ByteBuffer castByteBuffer;
public BufferedOutput(int bufferSize) {
if(bufferSize < 9) {
bufferSize = 9;
}
this.bufferSize = bufferSize;
}
private void reserve(int len) throws IOException {
if(buffer == null) {
buffer = new byte[bufferSize];
castByteBuffer = ByteBuffer.wrap(buffer);
return;
}
if(bufferSize - filled < len) {
if(!flushBuffer(buffer, 0, filled)) {
buffer = new byte[bufferSize];
castByteBuffer = ByteBuffer.wrap(buffer);
}
filled = 0;
}
}
public void write(byte[] b, int off, int len) throws IOException {
if(buffer == null) {
if(bufferSize < len) {
flushBuffer(b, off, len);
return;
}
buffer = new byte[bufferSize];
castByteBuffer = ByteBuffer.wrap(buffer);
}
if(len <= bufferSize - filled) {
System.arraycopy(b, off, buffer, filled, len);
filled += len;
} else if(len < bufferSize) {
if(!flushBuffer(buffer, 0, filled)) {
buffer = new byte[bufferSize];
}
filled = 0;
System.arraycopy(b, off, buffer, 0, len);
filled = len;
} else {
flush();
flushBuffer(b, off, len);
}
}
public void writeByte(byte v) throws IOException {
reserve(1);
buffer[filled++] = v;
}
public void writeShort(short v) throws IOException {
reserve(2);
castByteBuffer.putShort(filled, v);
filled += 2;
}
public void writeInt(int v) throws IOException {
reserve(4);
castByteBuffer.putInt(filled, v);
filled += 4;
}
public void writeLong(long v) throws IOException {
reserve(8);
castByteBuffer.putLong(filled, v);
filled += 8;
}
public void writeFloat(float v) throws IOException {
reserve(4);
castByteBuffer.putFloat(filled, v);
filled += 4;
}
public void writeDouble(double v) throws IOException {
reserve(8);
castByteBuffer.putDouble(filled, v);
filled += 8;
}
public void writeByteAndByte(byte b, byte v) throws IOException {
reserve(2);
buffer[filled++] = b;
buffer[filled++] = v;
}
public void writeByteAndShort(byte b, short v) throws IOException {
reserve(3);
buffer[filled++] = b;
castByteBuffer.putShort(filled, v);
filled += 2;
}
public void writeByteAndInt(byte b, int v) throws IOException {
reserve(5);
buffer[filled++] = b;
castByteBuffer.putInt(filled, v);
filled += 4;
}
public void writeByteAndLong(byte b, long v) throws IOException {
reserve(9);
buffer[filled++] = b;
castByteBuffer.putLong(filled, v);
filled += 8;
}
public void writeByteAndFloat(byte b, float v) throws IOException {
reserve(5);
buffer[filled++] = b;
castByteBuffer.putFloat(filled, v);
filled += 4;
}
public void writeByteAndDouble(byte b, double v) throws IOException {
reserve(9);
buffer[filled++] = b;
castByteBuffer.putDouble(filled, v);
filled += 8;
}
public void flush() throws IOException {
if(filled > 0) {
if(!flushBuffer(buffer, 0, filled)) {
buffer = null;
}
filled = 0;
}
}
protected abstract boolean flushBuffer(byte[] buffer, int off, int len) throws IOException;
}