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package com.sun.enterprise.admin.util.proxy;

import java.lang.reflect.Proxy;

/**
 *
 */
public class ProxyFactory {
    
    /** Creates a new instance of ProxyFactory */
    private ProxyFactory() {
    }

    public static Object createProxy(Class intfc, Object handler,
            Interceptor interceptor) {
        if (!intfc.isInterface()) {
            throw new IllegalArgumentException(intfc.getClass()
                    + " is not an interface");
        }
        if (!isImplementing(intfc, handler)) {
            throw new IllegalArgumentException("Handler object " + handler
                    + " is not an instance of " + intfc.getName());
        }
        Object obj = Proxy.newProxyInstance(
                handler.getClass().getClassLoader(),
                new Class[] {intfc},
                new ProxyClass(handler, interceptor));
        return obj;
    }

    private static boolean isImplementing(Class intfc, Object obj) {
        return intfc.isInstance(obj);
    }
}