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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing,<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * software distributed under the License is distributed on an<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * KIND, either express or implied. See the License for the<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * specific language governing permissions and limitations<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> */<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>package org.apache.felix.ipojo.manipulation;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span><a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.objectweb.asm.ClassWriter;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span><a name="line.23"></a> |
| <span class="sourceLineNo">024</span>/**<a name="line.24"></a> |
| <span class="sourceLineNo">025</span> * An extension of {@link org.objectweb.asm.ClassWriter} that uses a specific classloader to load classes.<a name="line.25"></a> |
| <span class="sourceLineNo">026</span> */<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>public class ClassLoaderAwareClassWriter extends ClassWriter {<a name="line.27"></a> |
| <span class="sourceLineNo">028</span><a name="line.28"></a> |
| <span class="sourceLineNo">029</span> private static final String OBJECT_INTERNAL_NAME = "java/lang/Object";<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> private final String className;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> private final String superClass;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> private final ClassLoader classLoader;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span><a name="line.33"></a> |
| <span class="sourceLineNo">034</span> public ClassLoaderAwareClassWriter(int flags, String className, String superClass, ClassLoader loader) {<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> super(flags);<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> this.className = className;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> this.superClass = superClass;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> this.classLoader = loader;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> }<a name="line.39"></a> |
| <span class="sourceLineNo">040</span><a name="line.40"></a> |
| <span class="sourceLineNo">041</span> /**<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * Implements the common super class lookup to be a bit more permissive. First we check is type1 == type2,<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * because in this case, the lookup is done. Then, if one of the class is Object,<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * returns object. If both checks failed, it returns Object.<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> *<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * @param type1 the first class<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * @param type2 the second class<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * @return the common super class<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> */<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> @Override<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> protected final String getCommonSuperClass(String type1, String type2) {<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> //If the two are equal then return either<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> if (type1.equals(type2)) {<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> return type1;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> }<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> //If either is Object, then Object must be the answer<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> if (type1.equals(OBJECT_INTERNAL_NAME) || type2.equals(OBJECT_INTERNAL_NAME)) {<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> return OBJECT_INTERNAL_NAME;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> }<a name="line.60"></a> |
| <span class="sourceLineNo">061</span><a name="line.61"></a> |
| <span class="sourceLineNo">062</span> // If either of these class names are the current class then we can short<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> // circuit to the superclass (which we already know)<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> if (type1.equals(className.replace(".", "/")) && superClass != null) {<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> return getCommonSuperClass(superClass.replace(".", "/"), type2);<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> } else if (type2.equals(className.replace(".", "/")) && superClass != null)<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> return getCommonSuperClass(type1, superClass.replace(".", "/"));<a name="line.67"></a> |
| <span class="sourceLineNo">068</span><a name="line.68"></a> |
| <span class="sourceLineNo">069</span> Class<?> c, d;<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> try {<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> c = classLoader.loadClass(type1.replace('/', '.'));<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> d = classLoader.loadClass(type2.replace('/', '.'));<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> } catch (Exception e) {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> throw new RuntimeException(e.toString());<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> }<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> if (c.isAssignableFrom(d)) {<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> return type1;<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> }<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> if (d.isAssignableFrom(c)) {<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> return type2;<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> }<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> if (c.isInterface() || d.isInterface()) {<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> return "java/lang/Object";<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> } else {<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> do {<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> c = c.getSuperclass();<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> } while (!c.isAssignableFrom(d));<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> return c.getName().replace('.', '/');<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> }<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> }<a name="line.90"></a> |
| <span class="sourceLineNo">091</span>}<a name="line.91"></a> |
| <span class="sourceLineNo">092</span><a name="line.92"></a> |
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| </pre> |
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