stack/core/src/main/java/org/apache/usergrid/persistence/cassandra/EntityValueSerializer.java

/*
 * 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.cassandra;


import java.nio.ByteBuffer;
import java.util.List;

import me.prettyprint.cassandra.serializers.AbstractSerializer;
import me.prettyprint.hector.api.beans.DynamicComposite;

import static org.apache.usergrid.utils.ConversionUtils.bytebuffer;


public class EntityValueSerializer extends AbstractSerializer<Object> {

    @Override
    public ByteBuffer toByteBuffer( Object obj ) {
        ByteBuffer bytes = null;
        if ( obj instanceof List ) {
            bytes = DynamicComposite.toByteBuffer( ( List<?> ) obj );
        }
        else if ( obj instanceof Object[] ) {
            bytes = DynamicComposite.toByteBuffer( ( Object[] ) obj );
        }
        else {
            bytes = bytebuffer( obj );
        }
        return bytes;
    }


    @Override
    public Object fromByteBuffer( ByteBuffer byteBuffer ) {
        throw new IllegalStateException(
                "The entity value serializer can only be used for data going to the database, " +
                        "and not data coming from the database" );
    }
}