/**
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
*/
package com.bigdata.rdf.internal;
import java.nio.ByteBuffer;
import java.util.UUID;
import javax.xml.bind.DatatypeConverter;
import com.bigdata.rdf.internal.impl.literal.AbstractLiteralIV;
import com.bigdata.rdf.internal.impl.literal.UUIDLiteralIV;
import com.bigdata.rdf.model.BigdataLiteral;
/**
*
* Inline URI Handler to handle URI's in the form of a Hex UUID such as:
*
* <pre>
* http://blazegraph.com/element/010072F0000038090100000000D56C9E
* </pre>
*
* {@link https://jira.blazegraph.com/browse/BLZG-1936}
*
* @author beebs
*
*/
public class InlineHexUUIDURIHandler extends InlineURIHandler {
/**
* Default URI namespace for inline UUIDs.
*/
public static final String NAMESPACE = "urn:hex:uuid:";
public InlineHexUUIDURIHandler(final String namespace) {
super(namespace);
}
@SuppressWarnings("rawtypes")
protected AbstractLiteralIV createInlineIV(final String localName) {
if (localName == null) {
return null;
}
try {
final byte uuid[] = DatatypeConverter.parseHexBinary(localName);
return new UUIDLiteralIV(asUuid(uuid));
} catch (IllegalArgumentException ex) {
/*
* Could not parse localName into a UUID. Fall through to TermIV.
*/
return null;
}
}
@SuppressWarnings("rawtypes")
@Override
public String getLocalNameFromDelegate(
AbstractLiteralIV<BigdataLiteral, ?> delegate) {
final UUID uuid = ((UUIDLiteralIV) delegate).getInlineValue();
final String localName = DatatypeConverter.printHexBinary(asBytes(uuid));
return localName;
}
public static UUID asUuid(byte[] bytes) {
ByteBuffer bb = ByteBuffer.wrap(bytes);
long firstLong = bb.getLong();
long secondLong = bb.getLong();
return new UUID(firstLong, secondLong);
}
public static byte[] asBytes(UUID uuid) {
ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
bb.putLong(uuid.getMostSignificantBits());
bb.putLong(uuid.getLeastSignificantBits());
return bb.array();
}
}