hivesterix/hivesterix-serde/src/main/java/edu/uci/ics/hivesterix/serde/lazy/objectinspector/LazyMapObjectInspector.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 edu.uci.ics.hivesterix.serde.lazy.objectinspector;

import java.util.Map;

import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.StandardMapObjectInspector;

import edu.uci.ics.hivesterix.serde.lazy.LazyMap;

/**
 * ObjectInspector for LazyMap.
 * 
 * @see LazyMap
 */
public class LazyMapObjectInspector extends StandardMapObjectInspector {

    protected LazyMapObjectInspector(ObjectInspector mapKeyObjectInspector, ObjectInspector mapValueObjectInspector) {
        super(mapKeyObjectInspector, mapValueObjectInspector);
    }

    @Override
    public Map<?, ?> getMap(Object data) {
        if (data == null) {
            return null;
        }
        return ((LazyMap) data).getMap();
    }

    @Override
    public int getMapSize(Object data) {
        if (data == null) {
            return -1;
        }
        return ((LazyMap) data).getMapSize();
    }

    @Override
    public Object getMapValueElement(Object data, Object key) {
        if (data == null) {
            return -1;
        }
        return ((LazyMap) data).getMapValueElement(key);
    }
}