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<pre><span class="sourceLineNo">001</span>package serp.bytecode;<a name="line.1"></a>
<span class="sourceLineNo">002</span><a name="line.2"></a>
<span class="sourceLineNo">003</span>import java.io.*;<a name="line.3"></a>
<span class="sourceLineNo">004</span>import java.util.*;<a name="line.4"></a>
<span class="sourceLineNo">005</span><a name="line.5"></a>
<span class="sourceLineNo">006</span>import serp.bytecode.lowlevel.*;<a name="line.6"></a>
<span class="sourceLineNo">007</span>import serp.bytecode.visitor.*;<a name="line.7"></a>
<span class="sourceLineNo">008</span>import serp.util.*;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>/**<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Attribute declaring the checked exceptions a method can throw.<a name="line.11"></a>
<span class="sourceLineNo">012</span> *<a name="line.12"></a>
<span class="sourceLineNo">013</span> * @author Abe White<a name="line.13"></a>
<span class="sourceLineNo">014</span> */<a name="line.14"></a>
<span class="sourceLineNo">015</span>public class Exceptions extends Attribute {<a name="line.15"></a>
<span class="sourceLineNo">016</span> private List _indexes = new LinkedList();<a name="line.16"></a>
<span class="sourceLineNo">017</span><a name="line.17"></a>
<span class="sourceLineNo">018</span> Exceptions(int nameIndex, Attributes owner) {<a name="line.18"></a>
<span class="sourceLineNo">019</span> super(nameIndex, owner);<a name="line.19"></a>
<span class="sourceLineNo">020</span> }<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span> int getLength() {<a name="line.22"></a>
<span class="sourceLineNo">023</span> return 2 + (2 * _indexes.size());<a name="line.23"></a>
<span class="sourceLineNo">024</span> }<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span> /**<a name="line.26"></a>
<span class="sourceLineNo">027</span> * Return the owning method.<a name="line.27"></a>
<span class="sourceLineNo">028</span> */<a name="line.28"></a>
<span class="sourceLineNo">029</span> public BCMethod getMethod() {<a name="line.29"></a>
<span class="sourceLineNo">030</span> return (BCMethod) getOwner();<a name="line.30"></a>
<span class="sourceLineNo">031</span> }<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span> /**<a name="line.33"></a>
<span class="sourceLineNo">034</span> * Return the indexes in the class {@link ConstantPool} of the<a name="line.34"></a>
<span class="sourceLineNo">035</span> * {@link ClassEntry}s for the exception types thrown by this method, or<a name="line.35"></a>
<span class="sourceLineNo">036</span> * an empty array if none.<a name="line.36"></a>
<span class="sourceLineNo">037</span> */<a name="line.37"></a>
<span class="sourceLineNo">038</span> public int[] getExceptionIndexes() {<a name="line.38"></a>
<span class="sourceLineNo">039</span> int[] indexes = new int[_indexes.size()];<a name="line.39"></a>
<span class="sourceLineNo">040</span> Iterator itr = _indexes.iterator();<a name="line.40"></a>
<span class="sourceLineNo">041</span> for (int i = 0; i < indexes.length; i++)<a name="line.41"></a>
<span class="sourceLineNo">042</span> indexes[i] = ((Integer) itr.next()).intValue();<a name="line.42"></a>
<span class="sourceLineNo">043</span> return indexes;<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> /**<a name="line.46"></a>
<span class="sourceLineNo">047</span> * Set the indexes in the class {@link ConstantPool} of the<a name="line.47"></a>
<span class="sourceLineNo">048</span> * {@link ClassEntry}s for the exception types thrown by this method. Use<a name="line.48"></a>
<span class="sourceLineNo">049</span> * null or an empty array for none.<a name="line.49"></a>
<span class="sourceLineNo">050</span> */<a name="line.50"></a>
<span class="sourceLineNo">051</span> public void setExceptionIndexes(int[] exceptionIndexes) {<a name="line.51"></a>
<span class="sourceLineNo">052</span> _indexes.clear();<a name="line.52"></a>
<span class="sourceLineNo">053</span> if (exceptionIndexes != null)<a name="line.53"></a>
<span class="sourceLineNo">054</span> for (int i = 0; i < exceptionIndexes.length; i++)<a name="line.54"></a>
<span class="sourceLineNo">055</span> _indexes.add(Numbers.valueOf(exceptionIndexes[i]));<a name="line.55"></a>
<span class="sourceLineNo">056</span> }<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span> /**<a name="line.58"></a>
<span class="sourceLineNo">059</span> * Return the names of the exception types for this method, or an empty<a name="line.59"></a>
<span class="sourceLineNo">060</span> * array if none. The names will be in a form suitable for a<a name="line.60"></a>
<span class="sourceLineNo">061</span> * {@link Class#forName} call.<a name="line.61"></a>
<span class="sourceLineNo">062</span> */<a name="line.62"></a>
<span class="sourceLineNo">063</span> public String[] getExceptionNames() {<a name="line.63"></a>
<span class="sourceLineNo">064</span> String[] names = new String[_indexes.size()];<a name="line.64"></a>
<span class="sourceLineNo">065</span> Iterator itr = _indexes.iterator();<a name="line.65"></a>
<span class="sourceLineNo">066</span> int index;<a name="line.66"></a>
<span class="sourceLineNo">067</span> ClassEntry entry;<a name="line.67"></a>
<span class="sourceLineNo">068</span> for (int i = 0; i < names.length; i++) {<a name="line.68"></a>
<span class="sourceLineNo">069</span> index = ((Number) itr.next()).intValue();<a name="line.69"></a>
<span class="sourceLineNo">070</span> entry = (ClassEntry) getPool().getEntry(index);<a name="line.70"></a>
<span class="sourceLineNo">071</span> names[i] = getProject().getNameCache().getExternalForm(entry.<a name="line.71"></a>
<span class="sourceLineNo">072</span> getNameEntry().getValue(), false);<a name="line.72"></a>
<span class="sourceLineNo">073</span> }<a name="line.73"></a>
<span class="sourceLineNo">074</span> return names;<a name="line.74"></a>
<span class="sourceLineNo">075</span> }<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> * Return the {@link Class} objects for the exception types for this<a name="line.78"></a>
<span class="sourceLineNo">079</span> * method, or an empty array if none.<a name="line.79"></a>
<span class="sourceLineNo">080</span> */<a name="line.80"></a>
<span class="sourceLineNo">081</span> public Class[] getExceptionTypes() {<a name="line.81"></a>
<span class="sourceLineNo">082</span> String[] names = getExceptionNames();<a name="line.82"></a>
<span class="sourceLineNo">083</span> Class[] types = new Class[names.length];<a name="line.83"></a>
<span class="sourceLineNo">084</span> for (int i = 0; i < names.length; i++)<a name="line.84"></a>
<span class="sourceLineNo">085</span> types[i] = Strings.toClass(names[i], getClassLoader());<a name="line.85"></a>
<span class="sourceLineNo">086</span> return types;<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> /**<a name="line.89"></a>
<span class="sourceLineNo">090</span> * Return bytecode for the exception types of this<a name="line.90"></a>
<span class="sourceLineNo">091</span> * method, or an empty array if none.<a name="line.91"></a>
<span class="sourceLineNo">092</span> */<a name="line.92"></a>
<span class="sourceLineNo">093</span> public BCClass[] getExceptionBCs() {<a name="line.93"></a>
<span class="sourceLineNo">094</span> String[] names = getExceptionNames();<a name="line.94"></a>
<span class="sourceLineNo">095</span> BCClass[] types = new BCClass[names.length];<a name="line.95"></a>
<span class="sourceLineNo">096</span> for (int i = 0; i < names.length; i++)<a name="line.96"></a>
<span class="sourceLineNo">097</span> types[i] = getProject().loadClass(names[i], getClassLoader());<a name="line.97"></a>
<span class="sourceLineNo">098</span> return types;<a name="line.98"></a>
<span class="sourceLineNo">099</span> }<a name="line.99"></a>
<span class="sourceLineNo">100</span><a name="line.100"></a>
<span class="sourceLineNo">101</span> /**<a name="line.101"></a>
<span class="sourceLineNo">102</span> * Set the checked exceptions thrown by this method. Use null or an<a name="line.102"></a>
<span class="sourceLineNo">103</span> * empty array for none.<a name="line.103"></a>
<span class="sourceLineNo">104</span> */<a name="line.104"></a>
<span class="sourceLineNo">105</span> public void setExceptions(String[] exceptions) {<a name="line.105"></a>
<span class="sourceLineNo">106</span> if (exceptions != null) {<a name="line.106"></a>
<span class="sourceLineNo">107</span> for (int i = 0; i < exceptions.length; i++)<a name="line.107"></a>
<span class="sourceLineNo">108</span> if (exceptions[i] == null)<a name="line.108"></a>
<span class="sourceLineNo">109</span> throw new NullPointerException("exceptions[" + i <a name="line.109"></a>
<span class="sourceLineNo">110</span> + "] = null");<a name="line.110"></a>
<span class="sourceLineNo">111</span> }<a name="line.111"></a>
<span class="sourceLineNo">112</span><a name="line.112"></a>
<span class="sourceLineNo">113</span> clear();<a name="line.113"></a>
<span class="sourceLineNo">114</span> if (exceptions != null)<a name="line.114"></a>
<span class="sourceLineNo">115</span> for (int i = 0; i < exceptions.length; i++)<a name="line.115"></a>
<span class="sourceLineNo">116</span> addException(exceptions[i]);<a name="line.116"></a>
<span class="sourceLineNo">117</span> }<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>
<span class="sourceLineNo">119</span> /**<a name="line.119"></a>
<span class="sourceLineNo">120</span> * Set the checked exceptions thrown by this method. Use null or an<a name="line.120"></a>
<span class="sourceLineNo">121</span> * empty array for none.<a name="line.121"></a>
<span class="sourceLineNo">122</span> */<a name="line.122"></a>
<span class="sourceLineNo">123</span> public void setExceptions(Class[] exceptions) {<a name="line.123"></a>
<span class="sourceLineNo">124</span> String[] names = null;<a name="line.124"></a>
<span class="sourceLineNo">125</span> if (exceptions != null) {<a name="line.125"></a>
<span class="sourceLineNo">126</span> names = new String[exceptions.length];<a name="line.126"></a>
<span class="sourceLineNo">127</span> for (int i = 0; i < exceptions.length; i++)<a name="line.127"></a>
<span class="sourceLineNo">128</span> names[i] = exceptions[i].getName();<a name="line.128"></a>
<span class="sourceLineNo">129</span> }<a name="line.129"></a>
<span class="sourceLineNo">130</span> setExceptions(names);<a name="line.130"></a>
<span class="sourceLineNo">131</span> }<a name="line.131"></a>
<span class="sourceLineNo">132</span><a name="line.132"></a>
<span class="sourceLineNo">133</span> /**<a name="line.133"></a>
<span class="sourceLineNo">134</span> * Set the checked exceptions thrown by this method. Use null or an<a name="line.134"></a>
<span class="sourceLineNo">135</span> * empty array for none.<a name="line.135"></a>
<span class="sourceLineNo">136</span> */<a name="line.136"></a>
<span class="sourceLineNo">137</span> public void setExceptions(BCClass[] exceptions) {<a name="line.137"></a>
<span class="sourceLineNo">138</span> String[] names = null;<a name="line.138"></a>
<span class="sourceLineNo">139</span> if (exceptions != null) {<a name="line.139"></a>
<span class="sourceLineNo">140</span> names = new String[exceptions.length];<a name="line.140"></a>
<span class="sourceLineNo">141</span> for (int i = 0; i < exceptions.length; i++)<a name="line.141"></a>
<span class="sourceLineNo">142</span> names[i] = exceptions[i].getName();<a name="line.142"></a>
<span class="sourceLineNo">143</span> }<a name="line.143"></a>
<span class="sourceLineNo">144</span> setExceptions(names);<a name="line.144"></a>
<span class="sourceLineNo">145</span> }<a name="line.145"></a>
<span class="sourceLineNo">146</span><a name="line.146"></a>
<span class="sourceLineNo">147</span> /**<a name="line.147"></a>
<span class="sourceLineNo">148</span> * Clear this method of all exception declarations.<a name="line.148"></a>
<span class="sourceLineNo">149</span> */<a name="line.149"></a>
<span class="sourceLineNo">150</span> public void clear() {<a name="line.150"></a>
<span class="sourceLineNo">151</span> _indexes.clear();<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> /**<a name="line.154"></a>
<span class="sourceLineNo">155</span> * Remove an exception type thrown by this method.<a name="line.155"></a>
<span class="sourceLineNo">156</span> *<a name="line.156"></a>
<span class="sourceLineNo">157</span> * @return true if the method had the exception type, false otherwise<a name="line.157"></a>
<span class="sourceLineNo">158</span> */<a name="line.158"></a>
<span class="sourceLineNo">159</span> public boolean removeException(String type) {<a name="line.159"></a>
<span class="sourceLineNo">160</span> String internalForm = getProject().getNameCache().getInternalForm(type,<a name="line.160"></a>
<span class="sourceLineNo">161</span> false);<a name="line.161"></a>
<span class="sourceLineNo">162</span> ClassEntry entry;<a name="line.162"></a>
<span class="sourceLineNo">163</span> for (Iterator itr = _indexes.iterator(); itr.hasNext();) {<a name="line.163"></a>
<span class="sourceLineNo">164</span> entry = (ClassEntry) getPool().getEntry(((Integer) itr.next()).<a name="line.164"></a>
<span class="sourceLineNo">165</span> intValue());<a name="line.165"></a>
<span class="sourceLineNo">166</span> if (entry.getNameEntry().getValue().equals(internalForm)) {<a name="line.166"></a>
<span class="sourceLineNo">167</span> itr.remove();<a name="line.167"></a>
<span class="sourceLineNo">168</span> return true;<a name="line.168"></a>
<span class="sourceLineNo">169</span> }<a name="line.169"></a>
<span class="sourceLineNo">170</span> }<a name="line.170"></a>
<span class="sourceLineNo">171</span> return false;<a name="line.171"></a>
<span class="sourceLineNo">172</span> }<a name="line.172"></a>
<span class="sourceLineNo">173</span><a name="line.173"></a>
<span class="sourceLineNo">174</span> /**<a name="line.174"></a>
<span class="sourceLineNo">175</span> * Remove an exception thrown by this method.<a name="line.175"></a>
<span class="sourceLineNo">176</span> *<a name="line.176"></a>
<span class="sourceLineNo">177</span> * @return true if the method had the exception type, false otherwise<a name="line.177"></a>
<span class="sourceLineNo">178</span> */<a name="line.178"></a>
<span class="sourceLineNo">179</span> public boolean removeException(Class type) {<a name="line.179"></a>
<span class="sourceLineNo">180</span> if (type == null)<a name="line.180"></a>
<span class="sourceLineNo">181</span> return false;<a name="line.181"></a>
<span class="sourceLineNo">182</span> return removeException(type.getName());<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> /**<a name="line.185"></a>
<span class="sourceLineNo">186</span> * Remove an exception thrown by this method.<a name="line.186"></a>
<span class="sourceLineNo">187</span> *<a name="line.187"></a>
<span class="sourceLineNo">188</span> * @return true if the method had the exception type, false otherwise<a name="line.188"></a>
<span class="sourceLineNo">189</span> */<a name="line.189"></a>
<span class="sourceLineNo">190</span> public boolean removeException(BCClass type) {<a name="line.190"></a>
<span class="sourceLineNo">191</span> if (type == null)<a name="line.191"></a>
<span class="sourceLineNo">192</span> return false;<a name="line.192"></a>
<span class="sourceLineNo">193</span> return removeException(type.getName());<a name="line.193"></a>
<span class="sourceLineNo">194</span> }<a name="line.194"></a>
<span class="sourceLineNo">195</span><a name="line.195"></a>
<span class="sourceLineNo">196</span> /**<a name="line.196"></a>
<span class="sourceLineNo">197</span> * Add an exception type to those thrown by this method.<a name="line.197"></a>
<span class="sourceLineNo">198</span> */<a name="line.198"></a>
<span class="sourceLineNo">199</span> public void addException(String type) {<a name="line.199"></a>
<span class="sourceLineNo">200</span> int index = getPool().findClassEntry(getProject().getNameCache().<a name="line.200"></a>
<span class="sourceLineNo">201</span> getInternalForm(type, false), true);<a name="line.201"></a>
<span class="sourceLineNo">202</span> _indexes.add(Numbers.valueOf(index));<a name="line.202"></a>
<span class="sourceLineNo">203</span> }<a name="line.203"></a>
<span class="sourceLineNo">204</span><a name="line.204"></a>
<span class="sourceLineNo">205</span> /**<a name="line.205"></a>
<span class="sourceLineNo">206</span> * Add an exception to those thrown by this method.<a name="line.206"></a>
<span class="sourceLineNo">207</span> */<a name="line.207"></a>
<span class="sourceLineNo">208</span> public void addException(Class type) {<a name="line.208"></a>
<span class="sourceLineNo">209</span> addException(type.getName());<a name="line.209"></a>
<span class="sourceLineNo">210</span> }<a name="line.210"></a>
<span class="sourceLineNo">211</span><a name="line.211"></a>
<span class="sourceLineNo">212</span> /**<a name="line.212"></a>
<span class="sourceLineNo">213</span> * Add an exception to those thrown by this method.<a name="line.213"></a>
<span class="sourceLineNo">214</span> */<a name="line.214"></a>
<span class="sourceLineNo">215</span> public void addException(BCClass type) {<a name="line.215"></a>
<span class="sourceLineNo">216</span> addException(type.getName());<a name="line.216"></a>
<span class="sourceLineNo">217</span> }<a name="line.217"></a>
<span class="sourceLineNo">218</span><a name="line.218"></a>
<span class="sourceLineNo">219</span> /**<a name="line.219"></a>
<span class="sourceLineNo">220</span> * Return true if the method declares that it throws the given<a name="line.220"></a>
<span class="sourceLineNo">221</span> * exception type.<a name="line.221"></a>
<span class="sourceLineNo">222</span> */<a name="line.222"></a>
<span class="sourceLineNo">223</span> public boolean throwsException(String type) {<a name="line.223"></a>
<span class="sourceLineNo">224</span> String[] exceptions = getExceptionNames();<a name="line.224"></a>
<span class="sourceLineNo">225</span> for (int i = 0; i < exceptions.length; i++)<a name="line.225"></a>
<span class="sourceLineNo">226</span> if (exceptions[i].equals(type))<a name="line.226"></a>
<span class="sourceLineNo">227</span> return true;<a name="line.227"></a>
<span class="sourceLineNo">228</span> return false;<a name="line.228"></a>
<span class="sourceLineNo">229</span> }<a name="line.229"></a>
<span class="sourceLineNo">230</span><a name="line.230"></a>
<span class="sourceLineNo">231</span> /**<a name="line.231"></a>
<span class="sourceLineNo">232</span> * Return true if the method declares that it throws the given<a name="line.232"></a>
<span class="sourceLineNo">233</span> * exception type.<a name="line.233"></a>
<span class="sourceLineNo">234</span> */<a name="line.234"></a>
<span class="sourceLineNo">235</span> public boolean throwsException(Class type) {<a name="line.235"></a>
<span class="sourceLineNo">236</span> if (type == null)<a name="line.236"></a>
<span class="sourceLineNo">237</span> return false;<a name="line.237"></a>
<span class="sourceLineNo">238</span> return throwsException(type.getName());<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> /**<a name="line.241"></a>
<span class="sourceLineNo">242</span> * Return true if the method declares that it throws the given<a name="line.242"></a>
<span class="sourceLineNo">243</span> * exception type.<a name="line.243"></a>
<span class="sourceLineNo">244</span> */<a name="line.244"></a>
<span class="sourceLineNo">245</span> public boolean throwsException(BCClass type) {<a name="line.245"></a>
<span class="sourceLineNo">246</span> if (type == null)<a name="line.246"></a>
<span class="sourceLineNo">247</span> return false;<a name="line.247"></a>
<span class="sourceLineNo">248</span> return throwsException(type.getName());<a name="line.248"></a>
<span class="sourceLineNo">249</span> }<a name="line.249"></a>
<span class="sourceLineNo">250</span><a name="line.250"></a>
<span class="sourceLineNo">251</span> public void acceptVisit(BCVisitor visit) {<a name="line.251"></a>
<span class="sourceLineNo">252</span> visit.enterExceptions(this);<a name="line.252"></a>
<span class="sourceLineNo">253</span> visit.exitExceptions(this);<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> void read(Attribute other) {<a name="line.256"></a>
<span class="sourceLineNo">257</span> setExceptions(((Exceptions) other).getExceptionNames());<a name="line.257"></a>
<span class="sourceLineNo">258</span> }<a name="line.258"></a>
<span class="sourceLineNo">259</span><a name="line.259"></a>
<span class="sourceLineNo">260</span> void read(DataInput in, int length) throws IOException {<a name="line.260"></a>
<span class="sourceLineNo">261</span> _indexes.clear();<a name="line.261"></a>
<span class="sourceLineNo">262</span> int exceptionCount = in.readUnsignedShort();<a name="line.262"></a>
<span class="sourceLineNo">263</span> for (int i = 0; i < exceptionCount; i++)<a name="line.263"></a>
<span class="sourceLineNo">264</span> _indexes.add(Numbers.valueOf((int) in.readUnsignedShort()));<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> void write(DataOutput out, int length) throws IOException {<a name="line.267"></a>
<span class="sourceLineNo">268</span> out.writeShort(_indexes.size());<a name="line.268"></a>
<span class="sourceLineNo">269</span> for (Iterator itr = _indexes.iterator(); itr.hasNext();)<a name="line.269"></a>
<span class="sourceLineNo">270</span> out.writeShort(((Number) itr.next()).shortValue());<a name="line.270"></a>
<span class="sourceLineNo">271</span> }<a name="line.271"></a>
<span class="sourceLineNo">272</span>}<a name="line.272"></a>
</pre>
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