com.jianggujin.http.support.JApiStore Maven / Gradle / Ivy

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package com.jianggujin.http.support;

import java.lang.reflect.Proxy;
import java.util.HashMap;
import java.util.Map;

/**
 * API仓库
 * 
 * @author jianggujin
 *
 */
public class JApiStore {
   private static JApiInvocationHandler handler = new JApiInvocationHandler();
   private static Map, Object> apiCache = new HashMap, Object>();

   /**
    * 获得API
    * 
    * @param clazz
    * @return
    */
   @SuppressWarnings("unchecked")
   public static  T getApi(Class clazz) {
      if (clazz == null) {
         throw new IllegalArgumentException("clazz must not be null");
      }
      Object obj = apiCache.get(clazz);
      if (obj == null) {
         synchronized (apiCache) {
            obj = apiCache.get(clazz);
            if (obj == null) {
               obj = (T) Proxy.newProxyInstance(clazz.getClassLoader(),
                     clazz.isInterface() ? new Class[] { clazz } : clazz.getInterfaces(), handler);
               apiCache.put(clazz, obj);
            }
         }
      }
      return (T) obj;
   }
}