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JPMML class model evaluator

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/*
 * Copyright (c) 2017 Villu Ruusmann
 *
 * This file is part of JPMML-Evaluator
 *
 * JPMML-Evaluator is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JPMML-Evaluator is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with JPMML-Evaluator.  If not, see .
 */
package org.jpmml.evaluator;

import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;

public class ValueMap extends LinkedHashMap> implements Iterable> {

	public ValueMap(){
		super();
	}

	public ValueMap(int initialCapacity){
		super(initialCapacity);
	}

	public ValueMap(Map> map){
		super(map);
	}

	@Override
	public Iterator> iterator(){
		return values().iterator();
	}

	protected ValueFactory getValueFactory(){
		throw new UnsupportedOperationException();
	}

	protected Value ensureValue(K key){
		Value value = get(key);

		if(value == null){
			ValueFactory valueFactory = getValueFactory();

			value = valueFactory.newValue();

			put(key, value);
		}

		return value;
	}
}