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package xyz.erupt.core.proxy;

import java.lang.annotation.Annotation;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;

/**
 * 代理池
 *
 * @author YuePeng
 * date 2022/2/7 10:27
 */
public class AnnotationProxyPool {

    /**
     * generic key raw annotation
     * generic value proxy annotation
     */
    private static final Map annotationPool = new HashMap<>();

    public static  A getOrPut(A rawAnnotation, Function function) {
        if (annotationPool.containsKey(rawAnnotation)) return (A) annotationPool.get(rawAnnotation);
        A proxyAnnotation = function.apply(rawAnnotation);
        annotationPool.put(rawAnnotation, proxyAnnotation);
        return proxyAnnotation;
    }

}