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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>package org.apache.felix.ipojo.composite.service.provides;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.lang.reflect.Method;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.List;<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.Handler;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.objectweb.asm.ClassWriter;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.objectweb.asm.Label;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.objectweb.asm.MethodVisitor;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.objectweb.asm.Opcodes;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.objectweb.asm.Type;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span><a name="line.30"></a> |
| <span class="sourceLineNo">031</span>/**<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> * Create the Proxy class.<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> * <a name="line.33"></a> |
| <span class="sourceLineNo">034</span> * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a><a name="line.34"></a> |
| <span class="sourceLineNo">035</span> */<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>public class POJOWriter implements Opcodes {<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> <a name="line.37"></a> |
| <span class="sourceLineNo">038</span> //TODO : merge this class with another class only static methods.<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> * Create a class.<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * @param cw : class writer<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * @param className : class name<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * @param spec : implemented specification<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> */<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> private static void createClass(ClassWriter cw, String className, String spec) {<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> // Create the class<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> cw.visit(V1_2, ACC_PUBLIC + ACC_SUPER, className, null, "java/lang/Object", new String[] { spec.replace('.', '/') });<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> /**<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * Inject field in the current class.<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * @param cw : class writer.<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * @param fields : list of field to inject.<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> */<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> private static void injectFields(ClassWriter cw, List fields) {<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> // Inject fields<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> for (int i = 0; i < fields.size(); i++) {<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> FieldMetadata field = (FieldMetadata) fields.get(i);<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> if (field.isUseful()) {<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> SpecificationMetadata spec = field.getSpecification();<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> String fieldName = field.getName();<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> String desc = "";<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> if (field.isAggregate()) {<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> desc = "[L" + spec.getName().replace('.', '/') + ";";<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> } else {<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> desc = "L" + spec.getName().replace('.', '/') + ";";<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> }<a name="line.68"></a> |
| <span class="sourceLineNo">069</span><a name="line.69"></a> |
| <span class="sourceLineNo">070</span> cw.visitField(Opcodes.ACC_PRIVATE, fieldName, desc, null, null);<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> }<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> <a name="line.74"></a> |
| <span class="sourceLineNo">075</span> /**<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * Generates an empty constructor.<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * this constructor just call the java.lang.Object constructor.<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * @param cw class writer<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> */<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> private static void generateConstructor(ClassWriter cw) {<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> // Inject a constructor <INIT>()V<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> MethodVisitor cst = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> cst.visitVarInsn(ALOAD, 0);<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> cst.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> cst.visitInsn(RETURN);<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> cst.visitMaxs(0, 0);<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> cst.visitEnd();<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> }<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> * Return the proxy 'classname' for the contract 'contractname' by delegating on available service.<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> * @param clazz : Specification class<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> * @param className : The class name to create<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> * @param fields : the list of fields on which delegate<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> * @param methods : the list of method on which delegate<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> * @param handler : handler object used to access the logger<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> * @return byte[] : the build class<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> */<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> public static byte[] dump(Class clazz, String className, List fields, List methods, Handler handler) {<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> Method[] itfmethods = clazz.getMethods();<a name="line.100"></a> |
| <span class="sourceLineNo">101</span><a name="line.101"></a> |
| <span class="sourceLineNo">102</span> // Create the class<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> className = className.replace('.', '/');<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> createClass(cw, className, clazz.getName());<a name="line.105"></a> |
| <span class="sourceLineNo">106</span><a name="line.106"></a> |
| <span class="sourceLineNo">107</span> // Inject fields inside the POJO<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> injectFields(cw, fields);<a name="line.108"></a> |
| <span class="sourceLineNo">109</span><a name="line.109"></a> |
| <span class="sourceLineNo">110</span> generateConstructor(cw);<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> <a name="line.111"></a> |
| <span class="sourceLineNo">112</span> for (int i = 0; i < itfmethods.length; ++i) {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> Method method = itfmethods[i];<a name="line.113"></a> |
| <span class="sourceLineNo">114</span><a name="line.114"></a> |
| <span class="sourceLineNo">115</span> // Get the field for this method<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> // 1) find the MethodMetadata<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> FieldMetadata delegator = null; // field to delegate<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> MethodMetadata methodDelegator = null; // field to delegate<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> for (int j = 0; j < methods.size(); j++) {<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> MethodMetadata methodMeta = (MethodMetadata) methods.get(j);<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> if (methodMeta.equals(method)) {<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> delegator = methodMeta.getDelegation();<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> methodDelegator = methodMeta;<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> }<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> }<a name="line.125"></a> |
| <span class="sourceLineNo">126</span><a name="line.126"></a> |
| <span class="sourceLineNo">127</span> generateMethod(cw, className, methodDelegator, method, delegator, handler);<a name="line.127"></a> |
| <span class="sourceLineNo">128</span><a name="line.128"></a> |
| <span class="sourceLineNo">129</span> }<a name="line.129"></a> |
| <span class="sourceLineNo">130</span><a name="line.130"></a> |
| <span class="sourceLineNo">131</span> // End process<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> cw.visitEnd();<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> return cw.toByteArray();<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> }<a name="line.134"></a> |
| <span class="sourceLineNo">135</span><a name="line.135"></a> |
| <span class="sourceLineNo">136</span> /**<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> * Generate on method.<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> * @param cw : class writer<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> * @param className : the current class name<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> * @param method : the method to generate<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> * @param sign : method signature to generate<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> * @param delegator : the field on which delegate<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> * @param handler : the handler (used to acess the logger)<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> */<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> private static void generateMethod(ClassWriter cw, String className, MethodMetadata method, Method sign, FieldMetadata delegator, Handler handler) {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> String desc = Type.getMethodDescriptor(sign);<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> String name = sign.getName();<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> String[] exc = new String[sign.getExceptionTypes().length];<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> for (int i = 0; i < sign.getExceptionTypes().length; i++) {<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> exc[i] = Type.getType(sign.getExceptionTypes()[i]).getInternalName();<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> MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, name, desc, null, exc);<a name="line.153"></a> |
| <span class="sourceLineNo">154</span><a name="line.154"></a> |
| <span class="sourceLineNo">155</span> if (delegator.isOptional()) {<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> if (!delegator.isAggregate()) {<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> generateOptionalCase(mv, delegator, className);<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> }<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> if (delegator.isAggregate() /*&& method.getPolicy() == MethodMetadata.ONE_POLICY*/) {<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> generateOptionalAggregateCase(mv, delegator, className);<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> }<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> }<a name="line.162"></a> |
| <span class="sourceLineNo">163</span><a name="line.163"></a> |
| <span class="sourceLineNo">164</span> if (delegator.isAggregate()) {<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> if (method.getPolicy() == MethodMetadata.ONE_POLICY) {<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> // Aggregate and One Policy<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> mv.visitVarInsn(ALOAD, 0);<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> mv.visitFieldInsn(GETFIELD, className, delegator.getName(), "[L" + delegator.getSpecification().getName().replace('.', '/') + ";");<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> mv.visitInsn(ICONST_0); // Use the first one<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> mv.visitInsn(AALOAD);<a name="line.170"></a> |
| <span class="sourceLineNo">171</span><a name="line.171"></a> |
| <span class="sourceLineNo">172</span> loadArgs(mv, ACC_PUBLIC, Type.getArgumentTypes(desc));<a name="line.172"></a> |
| <span class="sourceLineNo">173</span><a name="line.173"></a> |
| <span class="sourceLineNo">174</span> // Invoke<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> mv.visitMethodInsn(INVOKEINTERFACE, delegator.getSpecification().getName().replace('.', '/'), name, desc);<a name="line.175"></a> |
| <span class="sourceLineNo">176</span><a name="line.176"></a> |
| <span class="sourceLineNo">177</span> // Return<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> mv.visitInsn(Type.getReturnType(desc).getOpcode(Opcodes.IRETURN));<a name="line.178"></a> |
| <span class="sourceLineNo">179</span><a name="line.179"></a> |
| <span class="sourceLineNo">180</span> } else { // All policy<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> if (Type.getReturnType(desc).getSort() != Type.VOID) {<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> handler.error("All policy cannot be used on method which does not return void");<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> }<a name="line.183"></a> |
| <span class="sourceLineNo">184</span><a name="line.184"></a> |
| <span class="sourceLineNo">185</span> Type[] args = Type.getArgumentTypes(desc);<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> int index = args.length + 1;<a name="line.186"></a> |
| <span class="sourceLineNo">187</span><a name="line.187"></a> |
| <span class="sourceLineNo">188</span> // Init<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> mv.visitInsn(ICONST_0);<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> mv.visitVarInsn(ISTORE, index);<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> Label l1b = new Label();<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> mv.visitLabel(l1b);<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> Label l2b = new Label();<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> mv.visitJumpInsn(GOTO, l2b);<a name="line.194"></a> |
| <span class="sourceLineNo">195</span><a name="line.195"></a> |
| <span class="sourceLineNo">196</span> // Loop<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> Label l3b = new Label();<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> mv.visitLabel(l3b);<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> mv.visitVarInsn(ALOAD, 0);<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> mv.visitFieldInsn(GETFIELD, className, delegator.getName(), "[L" + delegator.getSpecification().getName().replace('.', '/') + ";");<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> mv.visitVarInsn(ILOAD, index);<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> mv.visitInsn(AALOAD);<a name="line.202"></a> |
| <span class="sourceLineNo">203</span><a name="line.203"></a> |
| <span class="sourceLineNo">204</span> loadArgs(mv, ACC_PUBLIC, Type.getArgumentTypes(desc));<a name="line.204"></a> |
| <span class="sourceLineNo">205</span><a name="line.205"></a> |
| <span class="sourceLineNo">206</span> mv.visitMethodInsn(INVOKEINTERFACE, delegator.getSpecification().getName().replace('.', '/'), name, desc);<a name="line.206"></a> |
| <span class="sourceLineNo">207</span><a name="line.207"></a> |
| <span class="sourceLineNo">208</span> Label l4b = new Label();<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> mv.visitLabel(l4b);<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> mv.visitIincInsn(index, 1); // i++;<a name="line.210"></a> |
| <span class="sourceLineNo">211</span><a name="line.211"></a> |
| <span class="sourceLineNo">212</span> // Condition<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> mv.visitLabel(l2b);<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> mv.visitVarInsn(ILOAD, index);<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> mv.visitVarInsn(ALOAD, 0);<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> mv.visitFieldInsn(GETFIELD, className, delegator.getName(), "[L" + delegator.getSpecification().getName().replace('.', '/') + ";");<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> mv.visitInsn(ARRAYLENGTH);<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> mv.visitJumpInsn(IF_ICMPLT, l3b);<a name="line.218"></a> |
| <span class="sourceLineNo">219</span><a name="line.219"></a> |
| <span class="sourceLineNo">220</span> Label l5b = new Label();<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> mv.visitLabel(l5b);<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> mv.visitInsn(RETURN);<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> }<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> } else {<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> mv.visitVarInsn(ALOAD, 0);<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> mv.visitFieldInsn(GETFIELD, className, delegator.getName(), "L" + delegator.getSpecification().getName().replace('.', '/') + ";");<a name="line.226"></a> |
| <span class="sourceLineNo">227</span><a name="line.227"></a> |
| <span class="sourceLineNo">228</span> loadArgs(mv, ACC_PUBLIC, Type.getArgumentTypes(desc));<a name="line.228"></a> |
| <span class="sourceLineNo">229</span><a name="line.229"></a> |
| <span class="sourceLineNo">230</span> // Invoke<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> if (delegator.getSpecification().isInterface()) {<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> mv.visitMethodInsn(INVOKEINTERFACE, delegator.getSpecification().getName().replace('.', '/'), name, desc);<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> } else {<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> mv.visitMethodInsn(INVOKEVIRTUAL, delegator.getSpecification().getName().replace('.', '/'), name, desc);<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> }<a name="line.235"></a> |
| <span class="sourceLineNo">236</span><a name="line.236"></a> |
| <span class="sourceLineNo">237</span> // Return<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> mv.visitInsn(Type.getReturnType(desc).getOpcode(IRETURN));<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> }<a name="line.239"></a> |
| <span class="sourceLineNo">240</span><a name="line.240"></a> |
| <span class="sourceLineNo">241</span> mv.visitMaxs(0, 0);<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> mv.visitEnd();<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> }<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> * Generate Optional Case for aggregate field.<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> * @param mv : method visitor<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> * @param delegator : Field on which delegate<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> * @param className : current class name<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> */<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> private static void generateOptionalAggregateCase(MethodVisitor mv, FieldMetadata delegator, String className) {<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> mv.visitVarInsn(ALOAD, 0);<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> mv.visitFieldInsn(GETFIELD, className, delegator.getName(), "[L" + delegator.getSpecification().getName().replace('.', '/') + ";");<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> mv.visitInsn(ARRAYLENGTH);<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> Label l1a = new Label();<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> mv.visitJumpInsn(IFNE, l1a);<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> Label l2a = new Label();<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> mv.visitLabel(l2a);<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> mv.visitTypeInsn(NEW, "java/lang/UnsupportedOperationException");<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> mv.visitInsn(DUP);<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> mv.visitLdcInsn("Operation not supported");<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> mv.visitMethodInsn(INVOKESPECIAL, "java/lang/UnsupportedOperationException", "<init>", "(Ljava/lang/String;)V");<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> mv.visitInsn(ATHROW);<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> mv.visitLabel(l1a);<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> }<a name="line.265"></a> |
| <span class="sourceLineNo">266</span><a name="line.266"></a> |
| <span class="sourceLineNo">267</span> /**<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> * Generate Optional case for non aggregate fields.<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> * <a name="line.269"></a> |
| <span class="sourceLineNo">270</span> * @param mv : the method visitor<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> * @param delegator : the field on which delegate.<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> * @param className : the name of the current class.<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> */<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> private static void generateOptionalCase(MethodVisitor mv, FieldMetadata delegator, String className) {<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> mv.visitVarInsn(ALOAD, 0);<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> mv.visitFieldInsn(GETFIELD, className, delegator.getName(), "L" + delegator.getSpecification().getName().replace('.', '/') + ";");<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> mv.visitTypeInsn(INSTANCEOF, "org/apache/felix/ipojo/Nullable");<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> Label end = new Label();<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> mv.visitJumpInsn(IFEQ, end);<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> Label begin = new Label();<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> mv.visitLabel(begin);<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> mv.visitTypeInsn(NEW, "java/lang/UnsupportedOperationException");<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> mv.visitInsn(DUP);<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> mv.visitLdcInsn("Operation not supported");<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> mv.visitMethodInsn(INVOKESPECIAL, "java/lang/UnsupportedOperationException", "<init>", "(Ljava/lang/String;)V");<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> mv.visitInsn(ATHROW);<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> mv.visitLabel(end);<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> }<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> <a name="line.289"></a> |
| <span class="sourceLineNo">290</span> /**<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> * Load on stack the method arguments.<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> * @param mv method visitor<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> * @param access access level of the method<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> * @param args argument types array<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> */<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> private static void loadArgs(MethodVisitor mv, int access, Type[] args) {<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> int i = 0;<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> int j = args.length;<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> int k = getArgIndex(access, args, i);<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> for (int l = 0; l < j; l++) {<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> Type type = args[i + l];<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> mv.visitVarInsn(type.getOpcode(ILOAD), k);<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> k += type.getSize();<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> }<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> }<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> <a name="line.306"></a> |
| <span class="sourceLineNo">307</span> /**<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> * Gets the index of the argument 'i'.<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> * This method manages double-spaces.<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> * @param access method access (mostly public)<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> * @param args argument type array<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> * @param i wanted index<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> * @return the real index<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> */<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> private static int getArgIndex(int access, Type[] args, int i) {<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> int j = (access & 8) != 0 ? 0 : 1;<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> for (int k = 0; k < i; k++) {<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> j += args[k].getSize();<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> }<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> return j;<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> }<a name="line.321"></a> |
| <span class="sourceLineNo">322</span><a name="line.322"></a> |
| <span class="sourceLineNo">323</span>}<a name="line.323"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
