/*
* JBoss, Home of Professional Open Source
* Copyright 2009 Red Hat Inc. and/or its affiliates and other
* contributors as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.infinispan.io;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
/**
* A byte buffer that exposes the internal byte array with minimal copying
*
* @author (various)
* @since 4.0
*/
public class ByteBuffer {
private final byte[] buf;
private final int offset;
private final int length;
public ByteBuffer(byte[] buf, int offset, int length) {
this.buf = buf;
this.offset = offset;
this.length = length;
}
public byte[] getBuf() {
return buf;
}
public int getOffset() {
return offset;
}
public int getLength() {
return length;
}
public ByteBuffer copy() {
byte[] new_buf = buf != null ? new byte[length] : null;
int new_length = new_buf != null ? new_buf.length : 0;
if (new_buf != null)
System.arraycopy(buf, offset, new_buf, 0, length);
return new ByteBuffer(new_buf, 0, new_length);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(length).append(" bytes");
if (offset > 0)
sb.append(" (offset=").append(offset).append(")");
return sb.toString();
}
/**
* @return an input stream for the bytes in the buffer
*/
public InputStream getStream() {
return new ByteArrayInputStream(getBuf(), getOffset(), getLength());
}
public java.nio.ByteBuffer toJDKByteBuffer() {
return java.nio.ByteBuffer.wrap(buf, offset, length);
}
}