// Copyright 2017 JanusGraph Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package org.janusgraph.graphdb.database.serialize.attribute;
import com.google.common.base.Preconditions;
import org.janusgraph.core.attribute.AttributeSerializer;
import org.janusgraph.diskstorage.ScanBuffer;
import org.janusgraph.diskstorage.WriteBuffer;
import java.util.UUID;
/**
* @author Bryn Cooke (bryn.cooke@datastax.com)
*/
public class UUIDSerializer implements AttributeSerializer<UUID> {
@Override
public UUID read(ScanBuffer buffer) {
long mostSignificantBits = buffer.getLong();
long leastSignificantBits = buffer.getLong();
return new UUID(mostSignificantBits, leastSignificantBits);
}
@Override
public void write(WriteBuffer buffer, UUID attribute) {
buffer.putLong(attribute.getMostSignificantBits());
buffer.putLong(attribute.getLeastSignificantBits());
}
@Override
public UUID convert(Object value) {
Preconditions.checkNotNull(value);
if(value instanceof String){
return UUID.fromString((String) value);
}
return null;
}
}