com.jchanghong.core.map.CaseInsensitiveMap Maven / Gradle / Ivy
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package com.jchanghong.core.map;
import java.util.HashMap;
import java.util.Map;
/**
* 忽略大小写的Map
* 对KEY忽略大小写，get("Value")和get("value")获得的值相同，put进入的值也会被覆盖
*
* @author Looly
*
* @param 键类型
* @param 值类型
* @since 3.0.2
*/
public class CaseInsensitiveMap extends CustomKeyMap {
private static final long serialVersionUID = 4043263744224569870L;
//------------------------------------------------------------------------- Constructor start
/**
* 构造
*/
public CaseInsensitiveMap() {
this(DEFAULT_INITIAL_CAPACITY);
}
/**
* 构造
*
* @param initialCapacity 初始大小
*/
public CaseInsensitiveMap(int initialCapacity) {
this(initialCapacity, DEFAULT_LOAD_FACTOR);
}
/**
* 构造
*
* @param m Map
*/
public CaseInsensitiveMap(Map m) {
this(DEFAULT_LOAD_FACTOR, m);
}
/**
* 构造
*
* @param loadFactor 加载因子
* @param m Map
* @since 3.1.2
*/
public CaseInsensitiveMap(float loadFactor, Map m) {
this(m.size(), loadFactor);
this.putAll(m);
}
/**
* 构造
*
* @param initialCapacity 初始大小
* @param loadFactor 加载因子
*/
public CaseInsensitiveMap(int initialCapacity, float loadFactor) {
super(new HashMap<>(initialCapacity, loadFactor));
}
//------------------------------------------------------------------------- Constructor end
/**
* 将Key转为小写
*
* @param key KEY
* @return 小写KEY
*/
@Override
protected Object customKey(Object key) {
if (key instanceof CharSequence) {
key = key.toString().toLowerCase();
}
return key;
}
}