/*
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Dec 23, 2007
*/
package com.bigdata.io;
import com.bigdata.util.BytesUtil;
/**
* Efficient absolute get/put operations on a slice of a byte[]. This class is
* not thread-safe under mutation because the operations are not atomic.
* Concurrent operations on the same region of the slice can reveal partial
* updates.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class FixedByteArrayBuffer extends AbstractFixedByteArrayBuffer {
/**
* An empty slice.
*/
public static final transient FixedByteArrayBuffer EMPTY = new FixedByteArrayBuffer(
BytesUtil.EMPTY, 0, 0);
/**
* The backing byte[].
*/
private final byte[] buf;
final public byte[] array() {
return buf;
}
/**
* Create an instance backed by a fixed capacity byte[].
*
* @param capacity
* The capacity of the backing byte[].
*/
public FixedByteArrayBuffer(final int capacity) {
super(0, capacity);
this.buf = new byte[capacity];
}
/**
* Create a slice of a byte[].
*
* @param buf
* The byte[].
* @param off
* The starting offset of the slice.
* @param len
* The length of the slice.
*/
public FixedByteArrayBuffer(final byte[] buf, final int off, final int len) {
super(off, len);
if (buf == null)
throw new IllegalArgumentException("buf");
if (off + len > buf.length)
throw new IllegalArgumentException("off+len>buf.length");
this.buf = buf;
}
}