/*
 * 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.utils;


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

import me.prettyprint.hector.api.beans.AbstractComposite.Component;
import me.prettyprint.hector.api.beans.AbstractComposite.ComponentEquality;
import me.prettyprint.hector.api.beans.DynamicComposite;


public class CompositeUtils {

    public static Object deserialize( ByteBuffer bytes ) {
        List<Object> objects = DynamicComposite.fromByteBuffer( bytes );
        if ( objects.size() > 0 ) {
            return objects.get( 0 );
        }
        return null;
    }


    @SuppressWarnings("unchecked")
    public static DynamicComposite setEqualityFlag( DynamicComposite composite, ComponentEquality eq ) {
        if ( composite.isEmpty() ) {
            return composite;
        }
        int i = composite.size() - 1;
        @SuppressWarnings("rawtypes") Component c = composite.getComponent( i );
        composite.setComponent( i, c.getValue(), c.getSerializer(), c.getComparator(), eq );
        return composite;
    }


    public static DynamicComposite setGreaterThanEqualityFlag( DynamicComposite composite ) {
        return setEqualityFlag( composite, ComponentEquality.GREATER_THAN_EQUAL );
    }
}