| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.jsecurity.aop; |
| |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.Method; |
| |
| /** |
| * MethodInterceptor that inspects a specific annotation on the method invocation before continuing |
| * its execution. |
| * |
| * @author Les Hazlewood |
| * @since 0.9 |
| */ |
| public abstract class AnnotationMethodInterceptor extends MethodInterceptorSupport { |
| |
| protected Class<? extends Annotation> annotationClass; |
| |
| public AnnotationMethodInterceptor( Class<? extends Annotation> annotationClass ) { |
| setAnnotationClass(annotationClass); |
| } |
| |
| protected void setAnnotationClass(Class<? extends Annotation> annotationClass) { |
| if (annotationClass == null) { |
| String msg = "annotationClass argument cannot be null"; |
| throw new IllegalArgumentException(msg); |
| } |
| this.annotationClass = annotationClass; |
| } |
| |
| public Class<? extends Annotation> getAnnotationClass() { |
| return this.annotationClass; |
| } |
| |
| public boolean supports(MethodInvocation mi) { |
| return getAnnotation(mi) != null; |
| } |
| |
| protected Annotation getAnnotation(MethodInvocation mi) { |
| if (mi == null) { |
| throw new IllegalArgumentException("method argument cannot be null"); |
| } |
| Method m = mi.getMethod(); |
| if (m == null) { |
| String msg = MethodInvocation.class.getName() + " parameter incorrectly " + |
| "constructed. getMethod() returned null"; |
| throw new IllegalArgumentException(msg); |
| |
| } |
| return m.getAnnotation(getAnnotationClass()); |
| |
| } |
| |
| } |