com.dahuatech.hutool.core.map.CustomKeyMap Maven / Gradle / Ivy

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package com.dahuatech.hutool.core.map;

import java.util.Map;

/**
 * 自定义键的Map，默认HashMap实现
 *
 * @author Looly
 * @param  键类型
 * @param  值类型
 * @since 4.0.7
 */
public abstract class CustomKeyMap extends MapWrapper {
  private static final long serialVersionUID = 4043263744224569870L;

  /**
   * 构造

   * 通过传入一个Map从而确定Map的类型，子类需创建一个空的Map，而非传入一个已有Map，否则值可能会被修改
   *
   * @param m Map 被包装的Map
   * @since 3.1.2
   */
  public CustomKeyMap(Map m) {
    super(m);
  }

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

  @SuppressWarnings("unchecked")
  @Override
  public V put(K key, V value) {
    return super.put((K) customKey(key), value);
  }

  @Override
  public void putAll(Map m) {
    for (Map.Entry entry : m.entrySet()) {
      this.put(entry.getKey(), entry.getValue());
    }
  }

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

  /**
   * 自定义键
   *
   * @param key KEY
   * @return 自定义KEY
   */
  protected abstract Object customKey(Object key);
}