1 /** 2 * Copyright (C) 2010 Google, Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.inject.persist.finder; 18 19 import java.lang.reflect.Method; 20 21 /** 22 * Utility that helps you introspect dynamic finder methods. 23 * 24 * @author dhanji (at) gmail.com (Dhanji R. Prasanna) 25 */ 26 public final class DynamicFinder { 27 private final Method method; 28 private final Finder finder; 29 30 public DynamicFinder(Method method) { 31 this.method = method; 32 this.finder = method.getAnnotation(Finder.class); 33 } 34 35 /** 36 * Returns some metadata if the method is annotated {@code @Finder} or null. 37 * 38 * @param method a method you want to test as a dynamic finder 39 */ 40 public static DynamicFinder from(Method method) { 41 return method.isAnnotationPresent(Finder.class) ? new DynamicFinder(method) : null; 42 } 43 44 public Finder metadata() { 45 return finder; 46 } 47 } 48
