cn.hutool.core.map.CamelCaseMap Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of hutool-all Show documentation

Hutool是一个小而全的Java工具类库，通过静态方法封装，降低相关API的学习成本，提高工作效率，使Java拥有函数式语言般的优雅，让Java语言也可以“甜甜的”。

There is a newer version: 5.8.34

package cn.hutool.core.map;

import cn.hutool.core.util.StrUtil;

import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;

/**
 * 驼峰Key风格的Map

 * 对KEY转换为驼峰，get("int_value")和get("intValue")获得的值相同，put进入的值也会被覆盖
 *
 * @param  键类型
 * @param  值类型
 * @author Looly
 * @since 4.0.7
 */
public class CamelCaseMap extends FuncKeyMap {
	private static final long serialVersionUID = 4043263744224569870L;

	// ------------------------------------------------------------------------- Constructor start

	/**
	 * 构造
	 */
	public CamelCaseMap() {
		this(DEFAULT_INITIAL_CAPACITY);
	}

	/**
	 * 构造
	 *
	 * @param initialCapacity 初始大小
	 */
	public CamelCaseMap(int initialCapacity) {
		this(initialCapacity, DEFAULT_LOAD_FACTOR);
	}

	/**
	 * 构造
	 *
	 * @param m Map
	 */
	public CamelCaseMap(Map m) {
		this(DEFAULT_LOAD_FACTOR, m);
	}

	/**
	 * 构造
	 *
	 * @param loadFactor 加载因子
	 * @param m          初始Map，数据会被默认拷贝到一个新的HashMap中
	 */
	public CamelCaseMap(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 CamelCaseMap(int initialCapacity, float loadFactor) {
		this(MapBuilder.create(new HashMap<>(initialCapacity, loadFactor)));
	}

	/**
	 * 构造

	 * 注意此构造将传入的Map作为被包装的Map，针对任何修改，传入的Map都会被同样修改。
	 *
	 * @param emptyMapBuilder Map构造器，必须构造空的Map
	 */
	CamelCaseMap(MapBuilder emptyMapBuilder) {
		// issue#I5VRHW@Gitee 使Function可以被序列化
		super(emptyMapBuilder.build(), (Function & Serializable)(key) -> {
			if (key instanceof CharSequence) {
				key = StrUtil.toCamelCase(key.toString());
			}
			//noinspection unchecked
			return (K) key;
		});
	}
	// ------------------------------------------------------------------------- Constructor end
}