/* Copyright (c) 2008-2018, Nathan Sweet
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
 * conditions are met:
 * 
 * - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided with the distribution.
 * - Neither the name of Esoteric Software nor the names of its contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */

package com.esotericsoftware.kryo.io;

import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;

/** An OutputStream whose target is a {@link ByteBuffer}. If bytes would be written that would overflow the buffer,
 * {@link #flush()} is called. Subclasses can override flush to empty the buffer.
 * @author Nathan Sweet */
public class ByteBufferOutputStream extends OutputStream {
	private ByteBuffer byteBuffer;

	/** Creates an uninitialized stream that cannot be used until {@link #setByteBuffer(ByteBuffer)} is called. */
	public ByteBufferOutputStream () {
	}

	/** Creates a stream with a new non-direct buffer of the specified size. */
	public ByteBufferOutputStream (int bufferSize) {
		this(ByteBuffer.allocate(bufferSize));
	}

	public ByteBufferOutputStream (ByteBuffer byteBuffer) {
		this.byteBuffer = byteBuffer;
	}

	public ByteBuffer getByteBuffer () {
		return byteBuffer;
	}

	public void setByteBuffer (ByteBuffer byteBuffer) {
		this.byteBuffer = byteBuffer;
	}

	public void write (int b) throws IOException {
		if (!byteBuffer.hasRemaining()) flush();
		byteBuffer.put((byte)b);
	}

	public void write (byte[] bytes, int offset, int length) throws IOException {
		if (byteBuffer.remaining() < length) flush();
		byteBuffer.put(bytes, offset, length);
	}
}
