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/**
 * ***************************************************************************** Copyright (c) 2018
 * Fraunhofer IEM, Paderborn, Germany. This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors: Johannes Spaeth - initial API and implementation
 * *****************************************************************************
 */
package boomerang.util;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

public abstract class DefaultValueMap implements Map {

  private HashMap map;

  public DefaultValueMap() {
    map = new HashMap();
  }

  @Override
  public int size() {
    return map.size();
  }

  @Override
  public boolean isEmpty() {
    return map.isEmpty();
  }

  @Override
  public boolean containsKey(Object key) {
    return map.containsKey(key);
  }

  @Override
  public boolean containsValue(Object value) {
    return map.containsValue(value);
  }

  protected abstract V createItem(K key);

  public V getOrCreate(K key) {
    if (!map.containsKey(key)) {
      V value = createItem((K) key);
      map.put((K) key, value);
      return value;
    }

    return map.get(key);
  }

  @Override
  public V get(Object key) {
    return map.get(key);
  }

  @Override
  public V put(K key, V value) {
    return map.put(key, value);
  }

  @Override
  public V remove(Object key) {
    return map.remove(key);
  }

  @Override
  public void putAll(Map m) {
    map.putAll(m);
  }

  @Override
  public void clear() {
    map.clear();
  }

  @Override
  public Set keySet() {
    return map.keySet();
  }

  @Override
  public Collection values() {
    return map.values();
  }

  @Override
  public Set> entrySet() {
    return map.entrySet();
  }
}