1 /** 2 * Copyright (C) 2006 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.internal; 18 19 import static com.google.common.base.Preconditions.checkNotNull; 20 21 import com.google.inject.matcher.Matcher; 22 23 import org.aopalliance.intercept.MethodInterceptor; 24 25 import java.lang.reflect.Method; 26 import java.util.Arrays; 27 import java.util.List; 28 29 /** 30 * Ties a matcher to a method interceptor. 31 * 32 * @author crazybob@google.com (Bob Lee) 33 */ 34 final class MethodAspect { 35 36 private final Matcher<? super Class<?>> classMatcher; 37 private final Matcher<? super Method> methodMatcher; 38 private final List<MethodInterceptor> interceptors; 39 40 /** 41 * @param classMatcher matches classes the interceptor should apply to. For example: {@code 42 * only(Runnable.class)}. 43 * @param methodMatcher matches methods the interceptor should apply to. For example: {@code 44 * annotatedWith(Transactional.class)}. 45 * @param interceptors to apply 46 */ MethodAspect(Matcher<? super Class<?>> classMatcher, Matcher<? super Method> methodMatcher, List<MethodInterceptor> interceptors)47 MethodAspect(Matcher<? super Class<?>> classMatcher, 48 Matcher<? super Method> methodMatcher, List<MethodInterceptor> interceptors) { 49 this.classMatcher = checkNotNull(classMatcher, "class matcher"); 50 this.methodMatcher = checkNotNull(methodMatcher, "method matcher"); 51 this.interceptors = checkNotNull(interceptors, "interceptors"); 52 } 53 MethodAspect(Matcher<? super Class<?>> classMatcher, Matcher<? super Method> methodMatcher, MethodInterceptor... interceptors)54 MethodAspect(Matcher<? super Class<?>> classMatcher, 55 Matcher<? super Method> methodMatcher, MethodInterceptor... interceptors) { 56 this(classMatcher, methodMatcher, Arrays.asList(interceptors)); 57 } 58 matches(Class<?> clazz)59 boolean matches(Class<?> clazz) { 60 return classMatcher.matches(clazz); 61 } 62 matches(Method method)63 boolean matches(Method method) { 64 return methodMatcher.matches(method); 65 } 66 interceptors()67 List<MethodInterceptor> interceptors() { 68 return interceptors; 69 } 70 } 71