platform/vcs-api/src/com/intellij/openapi/vcs/changes/PseudoMap.java

/*
 * Copyright 2000-2010 JetBrains s.r.o.
 *
 * 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.intellij.openapi.vcs.changes;

import com.intellij.util.NullableFunction;
import com.intellij.util.PairConsumer;

import java.util.HashMap;
import java.util.Map;

public class PseudoMap<Key, Value> implements PairConsumer<Key, Value>, NullableFunction<Key, Value> {
  private final Map<Key, Value> myMap;

  public PseudoMap() {
    myMap = createMap();
  }

  protected Map<Key, Value> createMap() {
    return new HashMap<Key, Value>();
  }

  public Value fun(Key key) {
    return myMap.get(key);
  }

  public void consume(Key key, Value value) {
    myMap.put(key, value);
  }
}