/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.usergrid.persistence.core.astyanax;
import java.util.UUID;
import org.apache.usergrid.persistence.model.entity.Id;
import org.apache.usergrid.persistence.model.entity.SimpleId;
import com.google.common.base.Preconditions;
import com.netflix.astyanax.model.DynamicComposite;
import com.netflix.astyanax.serializers.StringSerializer;
import com.netflix.astyanax.serializers.UUIDSerializer;
/**
* Serializer for serializing ids into rows
*
* @author tnine
*/
public class IdColDynamicCompositeSerializer implements DynamicCompositeFieldSerializer<Id> {
private static final StringSerializer STRING_SERIALIZER = StringSerializer.get();
private static final UUIDSerializer UUID_SERIALIZER = UUIDSerializer.get();
private static final IdColDynamicCompositeSerializer INSTANCE =
new IdColDynamicCompositeSerializer();
private IdColDynamicCompositeSerializer() {
}
/**
* Get the singleton serializer
*/
public static IdColDynamicCompositeSerializer get() {
return INSTANCE;
}
@Override
public void toComposite( final DynamicComposite composite, final Id value ) {
composite.addComponent( value.getUuid(), UUID_SERIALIZER );
composite.addComponent( value.getType(), STRING_SERIALIZER );
}
@Override
public Id fromComposite( final DynamicComposite composite, int startIndex ) {
Preconditions.checkArgument( composite.size() >= startIndex+2, "Composite must contain a next element for uuid and type" );
final UUID uuid = composite.get(startIndex, UUID_SERIALIZER );
final String type = composite.get(startIndex +1, STRING_SERIALIZER);
return new SimpleId(uuid, type );
}
}