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| <pre><span class="sourceLineNo">001</span><a id="line.1">/*</a> |
| <span class="sourceLineNo">002</span><a id="line.2"> * Licensed to the Apache Software Foundation (ASF) under one</a> |
| <span class="sourceLineNo">003</span><a id="line.3"> * or more contributor license agreements. See the NOTICE file</a> |
| <span class="sourceLineNo">004</span><a id="line.4"> * distributed with this work for additional information</a> |
| <span class="sourceLineNo">005</span><a id="line.5"> * regarding copyright ownership. The ASF licenses this file</a> |
| <span class="sourceLineNo">006</span><a id="line.6"> * to you under the Apache License, Version 2.0 (the</a> |
| <span class="sourceLineNo">007</span><a id="line.7"> * "License"); you may not use this file except in compliance</a> |
| <span class="sourceLineNo">008</span><a id="line.8"> * with the License. You may obtain a copy of the License at</a> |
| <span class="sourceLineNo">009</span><a id="line.9"> *</a> |
| <span class="sourceLineNo">010</span><a id="line.10"> * http://www.apache.org/licenses/LICENSE-2.0</a> |
| <span class="sourceLineNo">011</span><a id="line.11"> *</a> |
| <span class="sourceLineNo">012</span><a id="line.12"> * Unless required by applicable law or agreed to in writing,</a> |
| <span class="sourceLineNo">013</span><a id="line.13"> * software distributed under the License is distributed on an</a> |
| <span class="sourceLineNo">014</span><a id="line.14"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</a> |
| <span class="sourceLineNo">015</span><a id="line.15"> * KIND, either express or implied. See the License for the</a> |
| <span class="sourceLineNo">016</span><a id="line.16"> * specific language governing permissions and limitations</a> |
| <span class="sourceLineNo">017</span><a id="line.17"> * under the License.</a> |
| <span class="sourceLineNo">018</span><a id="line.18"> */</a> |
| <span class="sourceLineNo">019</span><a id="line.19">package org.apache.shiro.aop;</a> |
| <span class="sourceLineNo">020</span><a id="line.20"></a> |
| <span class="sourceLineNo">021</span><a id="line.21">import java.lang.annotation.Annotation;</a> |
| <span class="sourceLineNo">022</span><a id="line.22">import java.lang.reflect.Method;</a> |
| <span class="sourceLineNo">023</span><a id="line.23"></a> |
| <span class="sourceLineNo">024</span><a id="line.24">/**</a> |
| <span class="sourceLineNo">025</span><a id="line.25"> * Default {@code AnnotationResolver} implementation that merely inspects the</a> |
| <span class="sourceLineNo">026</span><a id="line.26"> * {@link MethodInvocation MethodInvocation}'s {@link MethodInvocation#getMethod() target method},</a> |
| <span class="sourceLineNo">027</span><a id="line.27"> * and returns {@code targetMethod}.{@link Method#getAnnotation(Class) getAnnotation(class)}.</a> |
| <span class="sourceLineNo">028</span><a id="line.28"> * <p/></a> |
| <span class="sourceLineNo">029</span><a id="line.29"> * Unfortunately Java's default reflection API for Annotations is not very robust, and this logic</a> |
| <span class="sourceLineNo">030</span><a id="line.30"> * may not be enough - if the incoming method invocation represents a method from an interface,</a> |
| <span class="sourceLineNo">031</span><a id="line.31"> * this default logic would not discover the annotation if it existed on the method implementation</a> |
| <span class="sourceLineNo">032</span><a id="line.32"> * directly (as opposed to being defined directly in the interface definition).</a> |
| <span class="sourceLineNo">033</span><a id="line.33"> * <p/></a> |
| <span class="sourceLineNo">034</span><a id="line.34"> * More complex class hierarchy traversal logic is required to exhaust a method's target object's</a> |
| <span class="sourceLineNo">035</span><a id="line.35"> * classes, parent classes, interfaces and parent interfaces. That logic will likely be added</a> |
| <span class="sourceLineNo">036</span><a id="line.36"> * to this implementation in due time, but for now, this implementation relies on the JDK's default</a> |
| <span class="sourceLineNo">037</span><a id="line.37"> * {@link Method#getAnnotation(Class) Method.getAnnotation(class)} logic.</a> |
| <span class="sourceLineNo">038</span><a id="line.38"> *</a> |
| <span class="sourceLineNo">039</span><a id="line.39"> * @since 1.1</a> |
| <span class="sourceLineNo">040</span><a id="line.40"> */</a> |
| <span class="sourceLineNo">041</span><a id="line.41">public class DefaultAnnotationResolver implements AnnotationResolver {</a> |
| <span class="sourceLineNo">042</span><a id="line.42"></a> |
| <span class="sourceLineNo">043</span><a id="line.43"> /**</a> |
| <span class="sourceLineNo">044</span><a id="line.44"> * Returns {@code methodInvocation.}{@link org.apache.shiro.aop.MethodInvocation#getMethod() getMethod()}.{@link Method#getAnnotation(Class) getAnnotation(clazz)}.</a> |
| <span class="sourceLineNo">045</span><a id="line.45"> *</a> |
| <span class="sourceLineNo">046</span><a id="line.46"> * @param mi the intercepted method to be invoked.</a> |
| <span class="sourceLineNo">047</span><a id="line.47"> * @param clazz the annotation class to use to find an annotation instance on the method.</a> |
| <span class="sourceLineNo">048</span><a id="line.48"> * @return the discovered annotation or {@code null} if an annotation instance could not be</a> |
| <span class="sourceLineNo">049</span><a id="line.49"> * found.</a> |
| <span class="sourceLineNo">050</span><a id="line.50"> */</a> |
| <span class="sourceLineNo">051</span><a id="line.51"> public Annotation getAnnotation(MethodInvocation mi, Class<? extends Annotation> clazz) {</a> |
| <span class="sourceLineNo">052</span><a id="line.52"> if (mi == null) {</a> |
| <span class="sourceLineNo">053</span><a id="line.53"> throw new IllegalArgumentException("method argument cannot be null");</a> |
| <span class="sourceLineNo">054</span><a id="line.54"> }</a> |
| <span class="sourceLineNo">055</span><a id="line.55"> Method m = mi.getMethod();</a> |
| <span class="sourceLineNo">056</span><a id="line.56"> if (m == null) {</a> |
| <span class="sourceLineNo">057</span><a id="line.57"> String msg = MethodInvocation.class.getName() + " parameter incorrectly constructed. getMethod() returned null";</a> |
| <span class="sourceLineNo">058</span><a id="line.58"> throw new IllegalArgumentException(msg);</a> |
| <span class="sourceLineNo">059</span><a id="line.59"></a> |
| <span class="sourceLineNo">060</span><a id="line.60"> }</a> |
| <span class="sourceLineNo">061</span><a id="line.61"> Annotation annotation = m.getAnnotation(clazz);</a> |
| <span class="sourceLineNo">062</span><a id="line.62"> if (annotation == null ) {</a> |
| <span class="sourceLineNo">063</span><a id="line.63"> Object miThis = mi.getThis();</a> |
| <span class="sourceLineNo">064</span><a id="line.64"> //SHIRO-473 - miThis could be null for static methods, just return null</a> |
| <span class="sourceLineNo">065</span><a id="line.65"> annotation = miThis != null ? miThis.getClass().getAnnotation(clazz) : null;</a> |
| <span class="sourceLineNo">066</span><a id="line.66"> }</a> |
| <span class="sourceLineNo">067</span><a id="line.67"> return annotation;</a> |
| <span class="sourceLineNo">068</span><a id="line.68"> }</a> |
| <span class="sourceLineNo">069</span><a id="line.69">}</a> |
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