/*
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 Sep 7, 2009
*/
package com.bigdata.btree.raba.codec;
import com.bigdata.btree.Leaf;
import com.bigdata.btree.Node;
import com.bigdata.btree.raba.IRaba;
import com.bigdata.btree.raba.MutableKeyBuffer;
import com.bigdata.btree.raba.MutableValueBuffer;
import com.bigdata.io.AbstractFixedByteArrayBuffer;
import com.bigdata.io.DataOutputBuffer;
/**
* This "codes" a raba as a {@link MutableKeyBuffer} or
* {@link MutableValueBuffer} depending on whether it represents B+Tree keys or
* values. This class is used by some unit tests as a convenience for
* establishing a baseline for the performance of {@link ICodedRaba}s against
* the core mutable {@link IRaba} implementations actually used by {@link Node}
* and {@link Leaf}.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
*/
public class MutableRabaCoder implements IRabaCoder {
/**
*
*/
private static final long serialVersionUID = -7123556255775810548L;
@Override
public ICodedRaba decode(final AbstractFixedByteArrayBuffer data) {
// Note: an alternative class is used to encode/decode.
final IRaba raba = SimpleRabaCoder.INSTANCE.decode(data);
if (raba.isKeys()) {
return new KeysRabaImpl(raba, data);
} else {
return new ValuesRabaImpl(raba, data);
}
}
@Override
public AbstractFixedByteArrayBuffer encode(final IRaba raba,
final DataOutputBuffer buf) {
return encodeLive(raba, buf).data();
}
@Override
public ICodedRaba encodeLive(final IRaba raba, final DataOutputBuffer buf) {
// Note: an alternative class is used to encode/decode.
final AbstractFixedByteArrayBuffer data = SimpleRabaCoder.INSTANCE
.encode(raba, buf);
if (raba.isKeys()) {
return new KeysRabaImpl(raba, data);
} else {
return new ValuesRabaImpl(raba, data);
}
}
/**
* Yes.
*/
@Override
final public boolean isKeyCoder() {
return true;
}
/**
* Yes.
*/
@Override
final public boolean isValueCoder() {
return true;
}
@Override
public boolean isDuplicateKeys() {
throw new UnsupportedOperationException();
}
/**
* {@link MutableKeyBuffer} with mock implementation of {@link ICodedRaba}
* methods.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
private static class KeysRabaImpl extends MutableKeyBuffer implements ICodedRaba {
private final AbstractFixedByteArrayBuffer data;
public KeysRabaImpl(final IRaba raba,
final AbstractFixedByteArrayBuffer data) {
super(raba.capacity(), raba);
this.data = data;
}
public AbstractFixedByteArrayBuffer data() {
return data;
}
}
/**
* {@link MutableValueBuffer} with mock implementation of {@link ICodedRaba}
* methods.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan
* Thompson</a>
*/
private static class ValuesRabaImpl extends MutableValueBuffer implements
ICodedRaba {
private final AbstractFixedByteArrayBuffer data;
public ValuesRabaImpl(final IRaba raba,
final AbstractFixedByteArrayBuffer data) {
super(raba.capacity(), raba);
this.data = data;
}
@Override
public AbstractFixedByteArrayBuffer data() {
return data;
}
}
}