/*
 * Licensed 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 com.addthis.hydra.task.output.tree;

import java.util.ArrayList;
import java.util.HashMap;

class IndexHash<V> {

    private HashMap<String, Integer> map  = new HashMap<>();
    private ArrayList<V> list = new ArrayList<>(64);

    public int add(String key, V value) {
        int pos = list.size();
        map.put(key, pos);
        list.add(value);
        return pos;
    }

    public V getValueByKey(String key) {
        return getValueByIndex(map.get(key));
    }

    public V getValueByIndex(Integer pos) {
        return list.get(pos);
    }

    public Integer getIndex(String key) {
        return map.get(key);
    }
}