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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 java.util.*;<a name="line.22"></a>
<span class="sourceLineNo">023</span><a name="line.23"></a>
<span class="sourceLineNo">024</span>import org.apache.felix.ipojo.manipulation.ClassChecker.AnnotationDescriptor;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.apache.felix.ipojo.metadata.Attribute;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.apache.felix.ipojo.metadata.Element;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.objectweb.asm.Type;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.objectweb.asm.tree.LocalVariableNode;<a name="line.28"></a>
<span class="sourceLineNo">029</span><a name="line.29"></a>
<span class="sourceLineNo">030</span>/**<a name="line.30"></a>
<span class="sourceLineNo">031</span> * Method Descriptor describe a method.<a name="line.31"></a>
<span class="sourceLineNo">032</span> * @author &lt;a href="mailto:dev@felix.apache.org"&gt;Felix Project Team&lt;/a&gt;<a name="line.32"></a>
<span class="sourceLineNo">033</span> */<a name="line.33"></a>
<span class="sourceLineNo">034</span>public class MethodDescriptor {<a name="line.34"></a>
<span class="sourceLineNo">035</span> /**<a name="line.35"></a>
<span class="sourceLineNo">036</span> * Method name.<a name="line.36"></a>
<span class="sourceLineNo">037</span> */<a name="line.37"></a>
<span class="sourceLineNo">038</span> private final String m_name;<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> * Returned type.<a name="line.41"></a>
<span class="sourceLineNo">042</span> */<a name="line.42"></a>
<span class="sourceLineNo">043</span> private final String m_returnType;<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span> /**<a name="line.45"></a>
<span class="sourceLineNo">046</span> * Argument types.<a name="line.46"></a>
<span class="sourceLineNo">047</span> */<a name="line.47"></a>
<span class="sourceLineNo">048</span> private final String[] m_arguments;<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span> /**<a name="line.50"></a>
<span class="sourceLineNo">051</span> * The descriptor of the method.<a name="line.51"></a>
<span class="sourceLineNo">052</span> */<a name="line.52"></a>
<span class="sourceLineNo">053</span> private final String m_desc;<a name="line.53"></a>
<span class="sourceLineNo">054</span><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> * The list of {@link AnnotationDescriptor} attached to this<a name="line.57"></a>
<span class="sourceLineNo">058</span> * method.<a name="line.58"></a>
<span class="sourceLineNo">059</span> */<a name="line.59"></a>
<span class="sourceLineNo">060</span> private List&lt;AnnotationDescriptor&gt; m_annotations;<a name="line.60"></a>
<span class="sourceLineNo">061</span><a name="line.61"></a>
<span class="sourceLineNo">062</span> /**<a name="line.62"></a>
<span class="sourceLineNo">063</span> * The association argument (number) - {@link AnnotationDescriptor}.<a name="line.63"></a>
<span class="sourceLineNo">064</span> */<a name="line.64"></a>
<span class="sourceLineNo">065</span> private Map&lt;Integer, List&lt;AnnotationDescriptor&gt;&gt; m_parameterAnnotations = new HashMap&lt;Integer, List&lt;AnnotationDescriptor&gt;&gt;();<a name="line.65"></a>
<span class="sourceLineNo">066</span><a name="line.66"></a>
<span class="sourceLineNo">067</span> /**<a name="line.67"></a>
<span class="sourceLineNo">068</span> * The arguments variables.<a name="line.68"></a>
<span class="sourceLineNo">069</span> */<a name="line.69"></a>
<span class="sourceLineNo">070</span> private List&lt;LocalVariableNode&gt; m_argLocalVariables;<a name="line.70"></a>
<span class="sourceLineNo">071</span><a name="line.71"></a>
<span class="sourceLineNo">072</span> /**<a name="line.72"></a>
<span class="sourceLineNo">073</span> * The stack size to keep of the arguments.<a name="line.73"></a>
<span class="sourceLineNo">074</span> */<a name="line.74"></a>
<span class="sourceLineNo">075</span> private final int m_argsVarLength;<a name="line.75"></a>
<span class="sourceLineNo">076</span><a name="line.76"></a>
<span class="sourceLineNo">077</span> /**<a name="line.77"></a>
<span class="sourceLineNo">078</span> * Flag indicating is the described method is static.<a name="line.78"></a>
<span class="sourceLineNo">079</span> */<a name="line.79"></a>
<span class="sourceLineNo">080</span> private final boolean m_isStatic;<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span> /**<a name="line.82"></a>
<span class="sourceLineNo">083</span> * The local variables by index.<a name="line.83"></a>
<span class="sourceLineNo">084</span> * This map is used to detect the argument names.<a name="line.84"></a>
<span class="sourceLineNo">085</span> */<a name="line.85"></a>
<span class="sourceLineNo">086</span> private LinkedHashMap&lt;Integer, LocalVariableNode&gt; m_locals = new LinkedHashMap&lt;Integer, LocalVariableNode&gt;();<a name="line.86"></a>
<span class="sourceLineNo">087</span><a name="line.87"></a>
<span class="sourceLineNo">088</span> /**<a name="line.88"></a>
<span class="sourceLineNo">089</span> * Constructor.<a name="line.89"></a>
<span class="sourceLineNo">090</span> * @param name : name of the method.<a name="line.90"></a>
<span class="sourceLineNo">091</span> * @param desc : descriptor of the method.<a name="line.91"></a>
<span class="sourceLineNo">092</span> * @param isStatic : is the method static<a name="line.92"></a>
<span class="sourceLineNo">093</span> */<a name="line.93"></a>
<span class="sourceLineNo">094</span> public MethodDescriptor(String name, String desc, boolean isStatic) {<a name="line.94"></a>
<span class="sourceLineNo">095</span> m_name = name;<a name="line.95"></a>
<span class="sourceLineNo">096</span> m_desc = desc;<a name="line.96"></a>
<span class="sourceLineNo">097</span> m_isStatic = isStatic;<a name="line.97"></a>
<span class="sourceLineNo">098</span> Type ret = Type.getReturnType(desc);<a name="line.98"></a>
<span class="sourceLineNo">099</span> Type[] args = Type.getArgumentTypes(desc);<a name="line.99"></a>
<span class="sourceLineNo">100</span><a name="line.100"></a>
<span class="sourceLineNo">101</span> m_returnType = getType(ret);<a name="line.101"></a>
<span class="sourceLineNo">102</span> m_arguments = new String[args.length];<a name="line.102"></a>
<span class="sourceLineNo">103</span> int argsVarLength = args.length;<a name="line.103"></a>
<span class="sourceLineNo">104</span> if (!m_isStatic) {<a name="line.104"></a>
<span class="sourceLineNo">105</span> argsVarLength++;<a name="line.105"></a>
<span class="sourceLineNo">106</span> }<a name="line.106"></a>
<span class="sourceLineNo">107</span> for (int i = 0; i &lt; args.length; i++) {<a name="line.107"></a>
<span class="sourceLineNo">108</span> String type = getType(args[i]);<a name="line.108"></a>
<span class="sourceLineNo">109</span> m_arguments[i] = type;<a name="line.109"></a>
<span class="sourceLineNo">110</span> if ("long".equals(type) || "double".equals(type)) {<a name="line.110"></a>
<span class="sourceLineNo">111</span> argsVarLength++;<a name="line.111"></a>
<span class="sourceLineNo">112</span> }<a name="line.112"></a>
<span class="sourceLineNo">113</span> }<a name="line.113"></a>
<span class="sourceLineNo">114</span> m_argsVarLength = argsVarLength;<a name="line.114"></a>
<span class="sourceLineNo">115</span> }<a name="line.115"></a>
<span class="sourceLineNo">116</span><a name="line.116"></a>
<span class="sourceLineNo">117</span> /**<a name="line.117"></a>
<span class="sourceLineNo">118</span> * Add an annotation to the current method.<a name="line.118"></a>
<span class="sourceLineNo">119</span> * @param ann annotation to add<a name="line.119"></a>
<span class="sourceLineNo">120</span> */<a name="line.120"></a>
<span class="sourceLineNo">121</span> public void addAnnotation(AnnotationDescriptor ann) {<a name="line.121"></a>
<span class="sourceLineNo">122</span> if (m_annotations == null) {<a name="line.122"></a>
<span class="sourceLineNo">123</span> m_annotations = new ArrayList&lt;AnnotationDescriptor&gt;();<a name="line.123"></a>
<span class="sourceLineNo">124</span> }<a name="line.124"></a>
<span class="sourceLineNo">125</span> m_annotations.add(ann);<a name="line.125"></a>
<span class="sourceLineNo">126</span> }<a name="line.126"></a>
<span class="sourceLineNo">127</span><a name="line.127"></a>
<span class="sourceLineNo">128</span> /**<a name="line.128"></a>
<span class="sourceLineNo">129</span> * Add an annotation to the current method.<a name="line.129"></a>
<span class="sourceLineNo">130</span> * @param ann annotation to add<a name="line.130"></a>
<span class="sourceLineNo">131</span> */<a name="line.131"></a>
<span class="sourceLineNo">132</span> public void addParameterAnnotation(int id, AnnotationDescriptor ann) {<a name="line.132"></a>
<span class="sourceLineNo">133</span> List&lt;AnnotationDescriptor&gt; list = m_parameterAnnotations.get(new Integer(id));<a name="line.133"></a>
<span class="sourceLineNo">134</span> if (list == null) {<a name="line.134"></a>
<span class="sourceLineNo">135</span> list = new ArrayList&lt;AnnotationDescriptor&gt;();<a name="line.135"></a>
<span class="sourceLineNo">136</span> m_parameterAnnotations.put(new Integer(id), list);<a name="line.136"></a>
<span class="sourceLineNo">137</span> }<a name="line.137"></a>
<span class="sourceLineNo">138</span> list.add(ann);<a name="line.138"></a>
<span class="sourceLineNo">139</span> }<a name="line.139"></a>
<span class="sourceLineNo">140</span><a name="line.140"></a>
<span class="sourceLineNo">141</span> public List&lt;AnnotationDescriptor&gt; getAnnotations() {<a name="line.141"></a>
<span class="sourceLineNo">142</span> return m_annotations;<a name="line.142"></a>
<span class="sourceLineNo">143</span> }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span> public Map&lt;Integer, List&lt;AnnotationDescriptor&gt;&gt; getParameterAnnotations() {<a name="line.145"></a>
<span class="sourceLineNo">146</span> return m_parameterAnnotations;<a name="line.146"></a>
<span class="sourceLineNo">147</span> }<a name="line.147"></a>
<span class="sourceLineNo">148</span><a name="line.148"></a>
<span class="sourceLineNo">149</span> public String getDescriptor() {<a name="line.149"></a>
<span class="sourceLineNo">150</span> return m_desc;<a name="line.150"></a>
<span class="sourceLineNo">151</span> }<a name="line.151"></a>
<span class="sourceLineNo">152</span><a name="line.152"></a>
<span class="sourceLineNo">153</span> /**<a name="line.153"></a>
<span class="sourceLineNo">154</span> * Compute method manipulation metadata.<a name="line.154"></a>
<span class="sourceLineNo">155</span> * @return the element containing metadata about this method.<a name="line.155"></a>
<span class="sourceLineNo">156</span> */<a name="line.156"></a>
<span class="sourceLineNo">157</span> public Element getElement() {<a name="line.157"></a>
<span class="sourceLineNo">158</span> Element method = new Element("method", "");<a name="line.158"></a>
<span class="sourceLineNo">159</span> method.addAttribute(new Attribute("name", m_name));<a name="line.159"></a>
<span class="sourceLineNo">160</span><a name="line.160"></a>
<span class="sourceLineNo">161</span> // Add return<a name="line.161"></a>
<span class="sourceLineNo">162</span> if (!m_returnType.equals("void")) {<a name="line.162"></a>
<span class="sourceLineNo">163</span> method.addAttribute(new Attribute("return", m_returnType));<a name="line.163"></a>
<span class="sourceLineNo">164</span> }<a name="line.164"></a>
<span class="sourceLineNo">165</span><a name="line.165"></a>
<span class="sourceLineNo">166</span> // Add arguments<a name="line.166"></a>
<span class="sourceLineNo">167</span> if (m_arguments.length &gt; 0) {<a name="line.167"></a>
<span class="sourceLineNo">168</span> StringBuilder args = new StringBuilder("{");<a name="line.168"></a>
<span class="sourceLineNo">169</span> StringBuilder names = new StringBuilder("{");<a name="line.169"></a>
<span class="sourceLineNo">170</span> args.append(m_arguments[0]);<a name="line.170"></a>
<span class="sourceLineNo">171</span> if (m_locals.containsKey(1)) {<a name="line.171"></a>
<span class="sourceLineNo">172</span> names.append(m_locals.get(1).name); // index +1 as the 0 is this<a name="line.172"></a>
<span class="sourceLineNo">173</span> }<a name="line.173"></a>
<span class="sourceLineNo">174</span> for (int i = 1; i &lt; m_arguments.length; i++) {<a name="line.174"></a>
<span class="sourceLineNo">175</span> args.append(",").append(m_arguments[i]);<a name="line.175"></a>
<span class="sourceLineNo">176</span> if (m_locals.containsKey(i +1)) {<a name="line.176"></a>
<span class="sourceLineNo">177</span> names.append(",").append(m_locals.get(i +1).name);<a name="line.177"></a>
<span class="sourceLineNo">178</span> }<a name="line.178"></a>
<span class="sourceLineNo">179</span> }<a name="line.179"></a>
<span class="sourceLineNo">180</span> args.append("}");<a name="line.180"></a>
<span class="sourceLineNo">181</span> names.append("}");<a name="line.181"></a>
<span class="sourceLineNo">182</span><a name="line.182"></a>
<span class="sourceLineNo">183</span> method.addAttribute(new Attribute("arguments", args.toString()));<a name="line.183"></a>
<span class="sourceLineNo">184</span> method.addAttribute(new Attribute("names", names.toString()));<a name="line.184"></a>
<span class="sourceLineNo">185</span> }<a name="line.185"></a>
<span class="sourceLineNo">186</span><a name="line.186"></a>
<span class="sourceLineNo">187</span> return method;<a name="line.187"></a>
<span class="sourceLineNo">188</span> }<a name="line.188"></a>
<span class="sourceLineNo">189</span><a name="line.189"></a>
<span class="sourceLineNo">190</span> /**<a name="line.190"></a>
<span class="sourceLineNo">191</span> * Get the iPOJO internal type for the given type.<a name="line.191"></a>
<span class="sourceLineNo">192</span> * @param type : type.<a name="line.192"></a>
<span class="sourceLineNo">193</span> * @return the iPOJO internal type.<a name="line.193"></a>
<span class="sourceLineNo">194</span> */<a name="line.194"></a>
<span class="sourceLineNo">195</span> private String getType(Type type) {<a name="line.195"></a>
<span class="sourceLineNo">196</span> switch (type.getSort()) {<a name="line.196"></a>
<span class="sourceLineNo">197</span> case Type.ARRAY:<a name="line.197"></a>
<span class="sourceLineNo">198</span> // Append brackets.<a name="line.198"></a>
<span class="sourceLineNo">199</span> String brackets = "";<a name="line.199"></a>
<span class="sourceLineNo">200</span> for (int i = 0; i &lt; type.getDimensions(); i++) {<a name="line.200"></a>
<span class="sourceLineNo">201</span> brackets += "[]";<a name="line.201"></a>
<span class="sourceLineNo">202</span> }<a name="line.202"></a>
<span class="sourceLineNo">203</span> Type elemType = type.getElementType();<a name="line.203"></a>
<span class="sourceLineNo">204</span> return getType(elemType) + brackets;<a name="line.204"></a>
<span class="sourceLineNo">205</span> case Type.BOOLEAN:<a name="line.205"></a>
<span class="sourceLineNo">206</span> return "boolean";<a name="line.206"></a>
<span class="sourceLineNo">207</span> case Type.BYTE:<a name="line.207"></a>
<span class="sourceLineNo">208</span> return "byte";<a name="line.208"></a>
<span class="sourceLineNo">209</span> case Type.CHAR:<a name="line.209"></a>
<span class="sourceLineNo">210</span> return "char";<a name="line.210"></a>
<span class="sourceLineNo">211</span> case Type.DOUBLE:<a name="line.211"></a>
<span class="sourceLineNo">212</span> return "double";<a name="line.212"></a>
<span class="sourceLineNo">213</span> case Type.FLOAT:<a name="line.213"></a>
<span class="sourceLineNo">214</span> return "float";<a name="line.214"></a>
<span class="sourceLineNo">215</span> case Type.INT:<a name="line.215"></a>
<span class="sourceLineNo">216</span> return "int";<a name="line.216"></a>
<span class="sourceLineNo">217</span> case Type.LONG:<a name="line.217"></a>
<span class="sourceLineNo">218</span> return "long";<a name="line.218"></a>
<span class="sourceLineNo">219</span> case Type.OBJECT:<a name="line.219"></a>
<span class="sourceLineNo">220</span> return type.getClassName();<a name="line.220"></a>
<span class="sourceLineNo">221</span> case Type.SHORT:<a name="line.221"></a>
<span class="sourceLineNo">222</span> return "short";<a name="line.222"></a>
<span class="sourceLineNo">223</span> case Type.VOID:<a name="line.223"></a>
<span class="sourceLineNo">224</span> return "void";<a name="line.224"></a>
<span class="sourceLineNo">225</span> default:<a name="line.225"></a>
<span class="sourceLineNo">226</span> return "unknown";<a name="line.226"></a>
<span class="sourceLineNo">227</span> }<a name="line.227"></a>
<span class="sourceLineNo">228</span> }<a name="line.228"></a>
<span class="sourceLineNo">229</span><a name="line.229"></a>
<span class="sourceLineNo">230</span> public String getName() {<a name="line.230"></a>
<span class="sourceLineNo">231</span> return m_name;<a name="line.231"></a>
<span class="sourceLineNo">232</span> }<a name="line.232"></a>
<span class="sourceLineNo">233</span><a name="line.233"></a>
<span class="sourceLineNo">234</span> public void addLocalVariable(String name, String desc, String signature, int index) {<a name="line.234"></a>
<span class="sourceLineNo">235</span> m_locals.put(index, new LocalVariableNode(name, desc, signature, null, null, index));<a name="line.235"></a>
<span class="sourceLineNo">236</span> if (index &gt;= m_argsVarLength) {<a name="line.236"></a>
<span class="sourceLineNo">237</span> // keep only argument-related local variables definitions (others relate to code which isn't in this method) <a name="line.237"></a>
<span class="sourceLineNo">238</span> return;<a name="line.238"></a>
<span class="sourceLineNo">239</span> }<a name="line.239"></a>
<span class="sourceLineNo">240</span> if (m_argLocalVariables == null) {<a name="line.240"></a>
<span class="sourceLineNo">241</span> m_argLocalVariables = new ArrayList&lt;LocalVariableNode&gt;();<a name="line.241"></a>
<span class="sourceLineNo">242</span> }<a name="line.242"></a>
<span class="sourceLineNo">243</span> m_argLocalVariables.add(new LocalVariableNode(name, desc, signature, null, null, index));<a name="line.243"></a>
<span class="sourceLineNo">244</span> }<a name="line.244"></a>
<span class="sourceLineNo">245</span><a name="line.245"></a>
<span class="sourceLineNo">246</span> public void end() {<a name="line.246"></a>
<span class="sourceLineNo">247</span> if (m_argLocalVariables != null &amp;&amp; m_argLocalVariables.size() &gt; 1) {<a name="line.247"></a>
<span class="sourceLineNo">248</span> // sort them by index, even if from experience, argument-related variables (and only those) are already sorted<a name="line.248"></a>
<span class="sourceLineNo">249</span> Collections.sort(m_argLocalVariables, new Comparator&lt;LocalVariableNode&gt;(){<a name="line.249"></a>
<span class="sourceLineNo">250</span> public int compare(LocalVariableNode o1, LocalVariableNode o2) {<a name="line.250"></a>
<span class="sourceLineNo">251</span> return o1.index - o2.index;<a name="line.251"></a>
<span class="sourceLineNo">252</span> }<a name="line.252"></a>
<span class="sourceLineNo">253</span> });<a name="line.253"></a>
<span class="sourceLineNo">254</span> }<a name="line.254"></a>
<span class="sourceLineNo">255</span> }<a name="line.255"></a>
<span class="sourceLineNo">256</span><a name="line.256"></a>
<span class="sourceLineNo">257</span> public List&lt;LocalVariableNode&gt; getArgumentLocalVariables() {<a name="line.257"></a>
<span class="sourceLineNo">258</span> return m_argLocalVariables;<a name="line.258"></a>
<span class="sourceLineNo">259</span> }<a name="line.259"></a>
<span class="sourceLineNo">260</span><a name="line.260"></a>
<span class="sourceLineNo">261</span> public LinkedHashMap&lt;Integer, LocalVariableNode&gt; getLocals() {<a name="line.261"></a>
<span class="sourceLineNo">262</span> return m_locals;<a name="line.262"></a>
<span class="sourceLineNo">263</span> }<a name="line.263"></a>
<span class="sourceLineNo">264</span>}<a name="line.264"></a>
</pre>
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