/*
* 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.pig.data;
import java.util.HashMap;
/**
* This class is an empty extension of Map<Object, Object>. It only
* exists so that DataType.findType() can distinguish an internal map
* type that maps object to object from an external map type that
* is string to object.
*
*/
public class InternalMap extends HashMap<Object, Object> {
private static final long serialVersionUID = 1L;
public InternalMap() {
super();
}
public InternalMap(int size) {
super(size);
}
}