cn.hutool.core.lang.intern.WeakInterner 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.lang.intern;

import cn.hutool.core.map.WeakConcurrentMap;

import java.lang.ref.WeakReference;

/**
 * 使用WeakHashMap(线程安全)存储对象的规范化对象，注意此对象需单例使用！

 *
 * @author looly
 * @since 5.4.3
 */
public class WeakInterner implements Interner{

	private final WeakConcurrentMap> cache = new WeakConcurrentMap<>();

	public T intern(T sample) {
		if (sample == null) {
			return null;
		}
		T val;
		do {
			val = this.cache.computeIfAbsent(sample, WeakReference::new).get();
		} while (val == null);
		return val;
	}
}