1 package groovy.lang; 2 3 /*** 4 * Implementers of this interface can be registered in the ProxyMetaClass for 5 * notifications about method calls for objects managed by the ProxyMetaClass. 6 * See groovy/lang/InterceptorTest.groovy for details. 7 * @author Dierk Koenig 8 */ 9 public interface Interceptor { 10 /*** 11 * This code is executed before the method is optionally called. 12 * @param object receiver object for the method call 13 * @param methodName name of the method to call 14 * @param arguments arguments to the method call 15 * @return any arbitrary result that replaces the result of the 16 * original method call only if doInvoke() returns false and afterInvoke() 17 * relays this result. 18 */ 19 Object beforeInvoke(Object object, String methodName, Object[] arguments); 20 /*** 21 * This code is executed after the method is optionally called. 22 * @param object receiver object for the called method 23 * @param methodName name of the called method 24 * @param arguments arguments to the called method 25 * @param result result of the executed method call or result of beforeInvoke if method was not called 26 * @return any arbitrary result that can replace the result of the 27 * original method call. Typically, the result parameter is returned. 28 */ 29 Object afterInvoke(Object object, String methodName, Object[] arguments, Object result); 30 /*** 31 * @return whether the target method should be invoked at all. 32 */ 33 boolean doInvoke(); 34 }