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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Cobertura - http://cobertura.sourceforge.net/<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Copyright (C) 2003 jcoverage ltd.<a name="line.4"></a>
<span class="sourceLineNo">005</span> * Copyright (C) 2005 Mark Doliner<a name="line.5"></a>
<span class="sourceLineNo">006</span> * Copyright (C) 2005 Grzegorz Lukasik<a name="line.6"></a>
<span class="sourceLineNo">007</span> * Copyright (C) 2005 Bj?rn Beskow<a name="line.7"></a>
<span class="sourceLineNo">008</span> * Copyright (C) 2006 John Lewis<a name="line.8"></a>
<span class="sourceLineNo">009</span> * Copyright (C) 2009 Chris van Es<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Copyright (C) 2009 Ed Randall<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Copyright (C) 2010 Charlie Squires<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Copyright (C) 2010 Piotr Tabor<a name="line.12"></a>
<span class="sourceLineNo">013</span> *<a name="line.13"></a>
<span class="sourceLineNo">014</span> * Cobertura is free software; you can redistribute it and/or modify<a name="line.14"></a>
<span class="sourceLineNo">015</span> * it under the terms of the GNU General Public License as published<a name="line.15"></a>
<span class="sourceLineNo">016</span> * by the Free Software Foundation; either version 2 of the License,<a name="line.16"></a>
<span class="sourceLineNo">017</span> * or (at your option) any later version.<a name="line.17"></a>
<span class="sourceLineNo">018</span> *<a name="line.18"></a>
<span class="sourceLineNo">019</span> * Cobertura is distributed in the hope that it will be useful, but<a name="line.19"></a>
<span class="sourceLineNo">020</span> * WITHOUT ANY WARRANTY; without even the implied warranty of<a name="line.20"></a>
<span class="sourceLineNo">021</span> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU<a name="line.21"></a>
<span class="sourceLineNo">022</span> * General Public License for more details.<a name="line.22"></a>
<span class="sourceLineNo">023</span> *<a name="line.23"></a>
<span class="sourceLineNo">024</span> * You should have received a copy of the GNU General Public License<a name="line.24"></a>
<span class="sourceLineNo">025</span> * along with Cobertura; if not, write to the Free Software<a name="line.25"></a>
<span class="sourceLineNo">026</span> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307<a name="line.26"></a>
<span class="sourceLineNo">027</span> * USA<a name="line.27"></a>
<span class="sourceLineNo">028</span> */<a name="line.28"></a>
<span class="sourceLineNo">029</span><a name="line.29"></a>
<span class="sourceLineNo">030</span>package net.sourceforge.cobertura.coveragedata;<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span>import java.io.File;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import java.util.Collection;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import java.util.HashMap;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import java.util.Iterator;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import java.util.Map;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import java.util.SortedSet;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import java.util.TreeSet;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import java.util.concurrent.locks.Lock;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import java.util.concurrent.locks.ReentrantLock;<a name="line.40"></a>
<span class="sourceLineNo">041</span><a name="line.41"></a>
<span class="sourceLineNo">042</span>import net.sourceforge.cobertura.util.FileLocker;<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span>public class ProjectData extends CoverageDataContainer implements HasBeenInstrumented<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> private static final long serialVersionUID = 6;<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span> /** This collection is used for quicker access to the list of classes. */<a name="line.49"></a>
<span class="sourceLineNo">050</span> private Map classes = new HashMap();<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span> public void addClassData(ClassData classData)<a name="line.52"></a>
<span class="sourceLineNo">053</span> {<a name="line.53"></a>
<span class="sourceLineNo">054</span> lock.lock();<a name="line.54"></a>
<span class="sourceLineNo">055</span> try<a name="line.55"></a>
<span class="sourceLineNo">056</span> {<a name="line.56"></a>
<span class="sourceLineNo">057</span> String packageName = classData.getPackageName();<a name="line.57"></a>
<span class="sourceLineNo">058</span> PackageData packageData = (PackageData)children.get(packageName);<a name="line.58"></a>
<span class="sourceLineNo">059</span> if (packageData == null)<a name="line.59"></a>
<span class="sourceLineNo">060</span> {<a name="line.60"></a>
<span class="sourceLineNo">061</span> packageData = new PackageData(packageName);<a name="line.61"></a>
<span class="sourceLineNo">062</span> // Each key is a package name, stored as an String object.<a name="line.62"></a>
<span class="sourceLineNo">063</span> // Each value is information about the package, stored as a PackageData object.<a name="line.63"></a>
<span class="sourceLineNo">064</span> this.children.put(packageName, packageData);<a name="line.64"></a>
<span class="sourceLineNo">065</span> }<a name="line.65"></a>
<span class="sourceLineNo">066</span> packageData.addClassData(classData);<a name="line.66"></a>
<span class="sourceLineNo">067</span> this.classes.put(classData.getName(), classData);<a name="line.67"></a>
<span class="sourceLineNo">068</span> }<a name="line.68"></a>
<span class="sourceLineNo">069</span> finally<a name="line.69"></a>
<span class="sourceLineNo">070</span> {<a name="line.70"></a>
<span class="sourceLineNo">071</span> lock.unlock();<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> public ClassData getClassData(String name)<a name="line.75"></a>
<span class="sourceLineNo">076</span> {<a name="line.76"></a>
<span class="sourceLineNo">077</span> lock.lock();<a name="line.77"></a>
<span class="sourceLineNo">078</span> try<a name="line.78"></a>
<span class="sourceLineNo">079</span> {<a name="line.79"></a>
<span class="sourceLineNo">080</span> return (ClassData)this.classes.get(name);<a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span> finally<a name="line.82"></a>
<span class="sourceLineNo">083</span> {<a name="line.83"></a>
<span class="sourceLineNo">084</span> lock.unlock();<a name="line.84"></a>
<span class="sourceLineNo">085</span> }<a name="line.85"></a>
<span class="sourceLineNo">086</span> }<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> * This is called by instrumented bytecode.<a name="line.89"></a>
<span class="sourceLineNo">090</span> */<a name="line.90"></a>
<span class="sourceLineNo">091</span> public ClassData getOrCreateClassData(String name)<a name="line.91"></a>
<span class="sourceLineNo">092</span> {<a name="line.92"></a>
<span class="sourceLineNo">093</span> lock.lock();<a name="line.93"></a>
<span class="sourceLineNo">094</span> try<a name="line.94"></a>
<span class="sourceLineNo">095</span> {<a name="line.95"></a>
<span class="sourceLineNo">096</span> ClassData classData = (ClassData)this.classes.get(name);<a name="line.96"></a>
<span class="sourceLineNo">097</span> if (classData == null)<a name="line.97"></a>
<span class="sourceLineNo">098</span> {<a name="line.98"></a>
<span class="sourceLineNo">099</span> classData = new ClassData(name);<a name="line.99"></a>
<span class="sourceLineNo">100</span> addClassData(classData);<a name="line.100"></a>
<span class="sourceLineNo">101</span> }<a name="line.101"></a>
<span class="sourceLineNo">102</span> return classData;<a name="line.102"></a>
<span class="sourceLineNo">103</span> }<a name="line.103"></a>
<span class="sourceLineNo">104</span> finally<a name="line.104"></a>
<span class="sourceLineNo">105</span> {<a name="line.105"></a>
<span class="sourceLineNo">106</span> lock.unlock();<a name="line.106"></a>
<span class="sourceLineNo">107</span> }<a name="line.107"></a>
<span class="sourceLineNo">108</span> }<a name="line.108"></a>
<span class="sourceLineNo">109</span><a name="line.109"></a>
<span class="sourceLineNo">110</span> public Collection getClasses()<a name="line.110"></a>
<span class="sourceLineNo">111</span> {<a name="line.111"></a>
<span class="sourceLineNo">112</span> lock.lock();<a name="line.112"></a>
<span class="sourceLineNo">113</span> try<a name="line.113"></a>
<span class="sourceLineNo">114</span> {<a name="line.114"></a>
<span class="sourceLineNo">115</span> return this.classes.values();<a name="line.115"></a>
<span class="sourceLineNo">116</span> }<a name="line.116"></a>
<span class="sourceLineNo">117</span> finally<a name="line.117"></a>
<span class="sourceLineNo">118</span> {<a name="line.118"></a>
<span class="sourceLineNo">119</span> lock.unlock();<a name="line.119"></a>
<span class="sourceLineNo">120</span> }<a name="line.120"></a>
<span class="sourceLineNo">121</span> }<a name="line.121"></a>
<span class="sourceLineNo">122</span><a name="line.122"></a>
<span class="sourceLineNo">123</span> public int getNumberOfClasses()<a name="line.123"></a>
<span class="sourceLineNo">124</span> {<a name="line.124"></a>
<span class="sourceLineNo">125</span> lock.lock();<a name="line.125"></a>
<span class="sourceLineNo">126</span> try<a name="line.126"></a>
<span class="sourceLineNo">127</span> {<a name="line.127"></a>
<span class="sourceLineNo">128</span> return this.classes.size();<a name="line.128"></a>
<span class="sourceLineNo">129</span> }<a name="line.129"></a>
<span class="sourceLineNo">130</span> finally<a name="line.130"></a>
<span class="sourceLineNo">131</span> {<a name="line.131"></a>
<span class="sourceLineNo">132</span> lock.unlock();<a name="line.132"></a>
<span class="sourceLineNo">133</span> }<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> public int getNumberOfSourceFiles()<a name="line.136"></a>
<span class="sourceLineNo">137</span> {<a name="line.137"></a>
<span class="sourceLineNo">138</span> return getSourceFiles().size();<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 SortedSet getPackages()<a name="line.141"></a>
<span class="sourceLineNo">142</span> {<a name="line.142"></a>
<span class="sourceLineNo">143</span> lock.lock();<a name="line.143"></a>
<span class="sourceLineNo">144</span> try<a name="line.144"></a>
<span class="sourceLineNo">145</span> {<a name="line.145"></a>
<span class="sourceLineNo">146</span> return new TreeSet(this.children.values());<a name="line.146"></a>
<span class="sourceLineNo">147</span> }<a name="line.147"></a>
<span class="sourceLineNo">148</span> finally<a name="line.148"></a>
<span class="sourceLineNo">149</span> {<a name="line.149"></a>
<span class="sourceLineNo">150</span> lock.unlock();<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> public Collection getSourceFiles()<a name="line.154"></a>
<span class="sourceLineNo">155</span> {<a name="line.155"></a>
<span class="sourceLineNo">156</span> SortedSet sourceFileDatas = new TreeSet();<a name="line.156"></a>
<span class="sourceLineNo">157</span> lock.lock();<a name="line.157"></a>
<span class="sourceLineNo">158</span> try<a name="line.158"></a>
<span class="sourceLineNo">159</span> {<a name="line.159"></a>
<span class="sourceLineNo">160</span> Iterator iter = this.children.values().iterator();<a name="line.160"></a>
<span class="sourceLineNo">161</span> while (iter.hasNext())<a name="line.161"></a>
<span class="sourceLineNo">162</span> {<a name="line.162"></a>
<span class="sourceLineNo">163</span> PackageData packageData = (PackageData)iter.next();<a name="line.163"></a>
<span class="sourceLineNo">164</span> sourceFileDatas.addAll(packageData.getSourceFiles());<a name="line.164"></a>
<span class="sourceLineNo">165</span> }<a name="line.165"></a>
<span class="sourceLineNo">166</span> }<a name="line.166"></a>
<span class="sourceLineNo">167</span> finally<a name="line.167"></a>
<span class="sourceLineNo">168</span> {<a name="line.168"></a>
<span class="sourceLineNo">169</span> lock.unlock();<a name="line.169"></a>
<span class="sourceLineNo">170</span> }<a name="line.170"></a>
<span class="sourceLineNo">171</span> return sourceFileDatas;<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> * Get all subpackages of the given package. Includes also specified package if<a name="line.175"></a>
<span class="sourceLineNo">176</span> * it exists.<a name="line.176"></a>
<span class="sourceLineNo">177</span> *<a name="line.177"></a>
<span class="sourceLineNo">178</span> * @param packageName The package name to find subpackages for.<a name="line.178"></a>
<span class="sourceLineNo">179</span> * For example, "com.example"<a name="line.179"></a>
<span class="sourceLineNo">180</span> * @return A collection containing PackageData objects. Each one<a name="line.180"></a>
<span class="sourceLineNo">181</span> * has a name beginning with the given packageName. For<a name="line.181"></a>
<span class="sourceLineNo">182</span> * example: "com.example.io", "com.example.io.internal"<a name="line.182"></a>
<span class="sourceLineNo">183</span> */<a name="line.183"></a>
<span class="sourceLineNo">184</span> public SortedSet getSubPackages(String packageName)<a name="line.184"></a>
<span class="sourceLineNo">185</span> {<a name="line.185"></a>
<span class="sourceLineNo">186</span> SortedSet subPackages = new TreeSet();<a name="line.186"></a>
<span class="sourceLineNo">187</span> lock.lock();<a name="line.187"></a>
<span class="sourceLineNo">188</span> try<a name="line.188"></a>
<span class="sourceLineNo">189</span> {<a name="line.189"></a>
<span class="sourceLineNo">190</span> Iterator iter = this.children.values().iterator();<a name="line.190"></a>
<span class="sourceLineNo">191</span> while (iter.hasNext())<a name="line.191"></a>
<span class="sourceLineNo">192</span> {<a name="line.192"></a>
<span class="sourceLineNo">193</span> PackageData packageData = (PackageData)iter.next();<a name="line.193"></a>
<span class="sourceLineNo">194</span> if (packageData.getName().startsWith(packageName + ".") || packageData.getName().equals(packageName) || packageName.equals(""))<a name="line.194"></a>
<span class="sourceLineNo">195</span> subPackages.add(packageData);<a name="line.195"></a>
<span class="sourceLineNo">196</span> }<a name="line.196"></a>
<span class="sourceLineNo">197</span> }<a name="line.197"></a>
<span class="sourceLineNo">198</span> finally<a name="line.198"></a>
<span class="sourceLineNo">199</span> {<a name="line.199"></a>
<span class="sourceLineNo">200</span> lock.unlock();<a name="line.200"></a>
<span class="sourceLineNo">201</span> }<a name="line.201"></a>
<span class="sourceLineNo">202</span> return subPackages;<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> public void merge(CoverageData coverageData)<a name="line.205"></a>
<span class="sourceLineNo">206</span> {<a name="line.206"></a>
<span class="sourceLineNo">207</span> if (coverageData == null) {<a name="line.207"></a>
<span class="sourceLineNo">208</span> return;<a name="line.208"></a>
<span class="sourceLineNo">209</span> }<a name="line.209"></a>
<span class="sourceLineNo">210</span> ProjectData projectData = (ProjectData)coverageData;<a name="line.210"></a>
<span class="sourceLineNo">211</span> getBothLocks(projectData);<a name="line.211"></a>
<span class="sourceLineNo">212</span> try<a name="line.212"></a>
<span class="sourceLineNo">213</span> {<a name="line.213"></a>
<span class="sourceLineNo">214</span> super.merge(coverageData);<a name="line.214"></a>
<span class="sourceLineNo">215</span> <a name="line.215"></a>
<span class="sourceLineNo">216</span> for (Iterator iter = projectData.classes.keySet().iterator(); iter.hasNext();)<a name="line.216"></a>
<span class="sourceLineNo">217</span> {<a name="line.217"></a>
<span class="sourceLineNo">218</span> Object key = iter.next();<a name="line.218"></a>
<span class="sourceLineNo">219</span> if (!this.classes.containsKey(key))<a name="line.219"></a>
<span class="sourceLineNo">220</span> {<a name="line.220"></a>
<span class="sourceLineNo">221</span> this.classes.put(key, projectData.classes.get(key));<a name="line.221"></a>
<span class="sourceLineNo">222</span> }<a name="line.222"></a>
<span class="sourceLineNo">223</span> }<a name="line.223"></a>
<span class="sourceLineNo">224</span> }<a name="line.224"></a>
<span class="sourceLineNo">225</span> finally<a name="line.225"></a>
<span class="sourceLineNo">226</span> {<a name="line.226"></a>
<span class="sourceLineNo">227</span> lock.unlock();<a name="line.227"></a>
<span class="sourceLineNo">228</span> projectData.lock.unlock();<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> // TODO: Is it possible to do this as a static initializer?<a name="line.232"></a>
<span class="sourceLineNo">233</span> public static void initialize()<a name="line.233"></a>
<span class="sourceLineNo">234</span> {<a name="line.234"></a>
<span class="sourceLineNo">235</span> // Hack for Tomcat - by saving project data right now we force loading<a name="line.235"></a>
<span class="sourceLineNo">236</span> // of classes involved in this process (like ObjectOutputStream)<a name="line.236"></a>
<span class="sourceLineNo">237</span> // so that it won't be necessary to load them on JVM shutdown<a name="line.237"></a>
<span class="sourceLineNo">238</span> if (System.getProperty("catalina.home") != null)<a name="line.238"></a>
<span class="sourceLineNo">239</span> {<a name="line.239"></a>
<span class="sourceLineNo">240</span> saveGlobalProjectData();<a name="line.240"></a>
<span class="sourceLineNo">241</span><a name="line.241"></a>
<span class="sourceLineNo">242</span> // Force the class loader to load some classes that are<a name="line.242"></a>
<span class="sourceLineNo">243</span> // required by our JVM shutdown hook.<a name="line.243"></a>
<span class="sourceLineNo">244</span> // TODO: Use ClassLoader.loadClass("whatever"); instead<a name="line.244"></a>
<span class="sourceLineNo">245</span> ClassData.class.toString();<a name="line.245"></a>
<span class="sourceLineNo">246</span> CoverageData.class.toString();<a name="line.246"></a>
<span class="sourceLineNo">247</span> CoverageDataContainer.class.toString();<a name="line.247"></a>
<span class="sourceLineNo">248</span> FileLocker.class.toString();<a name="line.248"></a>
<span class="sourceLineNo">249</span> HasBeenInstrumented.class.toString();<a name="line.249"></a>
<span class="sourceLineNo">250</span> LineData.class.toString();<a name="line.250"></a>
<span class="sourceLineNo">251</span> PackageData.class.toString();<a name="line.251"></a>
<span class="sourceLineNo">252</span> SourceFileData.class.toString();<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> // Add a hook to save the data when the JVM exits<a name="line.255"></a>
<span class="sourceLineNo">256</span> Runtime.getRuntime().addShutdownHook(new Thread(new SaveTimer()));<a name="line.256"></a>
<span class="sourceLineNo">257</span><a name="line.257"></a>
<span class="sourceLineNo">258</span> // Possibly also save the coverage data every x seconds?<a name="line.258"></a>
<span class="sourceLineNo">259</span> //Timer timer = new Timer(true);<a name="line.259"></a>
<span class="sourceLineNo">260</span> //timer.schedule(saveTimer, 100);<a name="line.260"></a>
<span class="sourceLineNo">261</span> }<a name="line.261"></a>
<span class="sourceLineNo">262</span><a name="line.262"></a>
<span class="sourceLineNo">263</span> public static void saveGlobalProjectData()<a name="line.263"></a>
<span class="sourceLineNo">264</span> {<a name="line.264"></a>
<span class="sourceLineNo">265</span> ProjectData projectDataToSave = new ProjectData();<a name="line.265"></a>
<span class="sourceLineNo">266</span> <a name="line.266"></a>
<span class="sourceLineNo">267</span> TouchCollector.applyTouchesOnProjectData(projectDataToSave);<a name="line.267"></a>
<span class="sourceLineNo">268</span><a name="line.268"></a>
<span class="sourceLineNo">269</span><a name="line.269"></a>
<span class="sourceLineNo">270</span> // Get a file lock<a name="line.270"></a>
<span class="sourceLineNo">271</span> File dataFile = CoverageDataFileHandler.getDefaultDataFile();<a name="line.271"></a>
<span class="sourceLineNo">272</span> <a name="line.272"></a>
<span class="sourceLineNo">273</span> /*<a name="line.273"></a>
<span class="sourceLineNo">274</span> * A note about the next synchronized block: Cobertura uses static fields to<a name="line.274"></a>
<span class="sourceLineNo">275</span> * hold the data. When there are multiple classloaders, each classloader<a name="line.275"></a>
<span class="sourceLineNo">276</span> * will keep track of the line counts for the classes that it loads. <a name="line.276"></a>
<span class="sourceLineNo">277</span> * <a name="line.277"></a>
<span class="sourceLineNo">278</span> * The static initializers for the Cobertura classes are also called for<a name="line.278"></a>
<span class="sourceLineNo">279</span> * each classloader. So, there is one shutdown hook for each classloader.<a name="line.279"></a>
<span class="sourceLineNo">280</span> * So, when the JVM exits, each shutdown hook will try to write the<a name="line.280"></a>
<span class="sourceLineNo">281</span> * data it has kept to the datafile. They will do this at the same<a name="line.281"></a>
<span class="sourceLineNo">282</span> * time. Before Java 6, this seemed to work fine, but with Java 6, there<a name="line.282"></a>
<span class="sourceLineNo">283</span> * seems to have been a change with how file locks are implemented. So,<a name="line.283"></a>
<span class="sourceLineNo">284</span> * care has to be taken to make sure only one thread locks a file at a time.<a name="line.284"></a>
<span class="sourceLineNo">285</span> * <a name="line.285"></a>
<span class="sourceLineNo">286</span> * So, we will synchronize on the string that represents the path to the<a name="line.286"></a>
<span class="sourceLineNo">287</span> * dataFile. Apparently, there will be only one of these in the JVM<a name="line.287"></a>
<span class="sourceLineNo">288</span> * even if there are multiple classloaders. I assume that is because<a name="line.288"></a>
<span class="sourceLineNo">289</span> * the String class is loaded by the JVM's root classloader. <a name="line.289"></a>
<span class="sourceLineNo">290</span> */<a name="line.290"></a>
<span class="sourceLineNo">291</span> synchronized (dataFile.getPath().intern() ) {<a name="line.291"></a>
<span class="sourceLineNo">292</span> FileLocker fileLocker = new FileLocker(dataFile);<a name="line.292"></a>
<span class="sourceLineNo">293</span> <a name="line.293"></a>
<span class="sourceLineNo">294</span> try<a name="line.294"></a>
<span class="sourceLineNo">295</span> {<a name="line.295"></a>
<span class="sourceLineNo">296</span> // Read the old data, merge our current data into it, then<a name="line.296"></a>
<span class="sourceLineNo">297</span> // write a new ser file.<a name="line.297"></a>
<span class="sourceLineNo">298</span> if (fileLocker.lock())<a name="line.298"></a>
<span class="sourceLineNo">299</span> {<a name="line.299"></a>
<span class="sourceLineNo">300</span> ProjectData datafileProjectData = loadCoverageDataFromDatafile(dataFile);<a name="line.300"></a>
<span class="sourceLineNo">301</span> if (datafileProjectData == null)<a name="line.301"></a>
<span class="sourceLineNo">302</span> {<a name="line.302"></a>
<span class="sourceLineNo">303</span> datafileProjectData = projectDataToSave;<a name="line.303"></a>
<span class="sourceLineNo">304</span> }<a name="line.304"></a>
<span class="sourceLineNo">305</span> else<a name="line.305"></a>
<span class="sourceLineNo">306</span> {<a name="line.306"></a>
<span class="sourceLineNo">307</span> datafileProjectData.merge(projectDataToSave);<a name="line.307"></a>
<span class="sourceLineNo">308</span> }<a name="line.308"></a>
<span class="sourceLineNo">309</span> CoverageDataFileHandler.saveCoverageData(datafileProjectData, dataFile);<a name="line.309"></a>
<span class="sourceLineNo">310</span> }<a name="line.310"></a>
<span class="sourceLineNo">311</span> }<a name="line.311"></a>
<span class="sourceLineNo">312</span> finally<a name="line.312"></a>
<span class="sourceLineNo">313</span> {<a name="line.313"></a>
<span class="sourceLineNo">314</span> // Release the file lock<a name="line.314"></a>
<span class="sourceLineNo">315</span> fileLocker.release();<a name="line.315"></a>
<span class="sourceLineNo">316</span> }<a name="line.316"></a>
<span class="sourceLineNo">317</span> }<a name="line.317"></a>
<span class="sourceLineNo">318</span> }<a name="line.318"></a>
<span class="sourceLineNo">319</span><a name="line.319"></a>
<span class="sourceLineNo">320</span> private static ProjectData loadCoverageDataFromDatafile(File dataFile)<a name="line.320"></a>
<span class="sourceLineNo">321</span> {<a name="line.321"></a>
<span class="sourceLineNo">322</span> ProjectData projectData = null;<a name="line.322"></a>
<span class="sourceLineNo">323</span><a name="line.323"></a>
<span class="sourceLineNo">324</span> // Read projectData from the serialized file.<a name="line.324"></a>
<span class="sourceLineNo">325</span> if (dataFile.isFile())<a name="line.325"></a>
<span class="sourceLineNo">326</span> {<a name="line.326"></a>
<span class="sourceLineNo">327</span> projectData = CoverageDataFileHandler.loadCoverageData(dataFile);<a name="line.327"></a>
<span class="sourceLineNo">328</span> }<a name="line.328"></a>
<span class="sourceLineNo">329</span><a name="line.329"></a>
<span class="sourceLineNo">330</span> if (projectData == null)<a name="line.330"></a>
<span class="sourceLineNo">331</span> {<a name="line.331"></a>
<span class="sourceLineNo">332</span> // We could not read from the serialized file, so use a new object.<a name="line.332"></a>
<span class="sourceLineNo">333</span> System.out.println("Cobertura: Coverage data file " + dataFile.getAbsolutePath()<a name="line.333"></a>
<span class="sourceLineNo">334</span> + " either does not exist or is not readable. Creating a new data file.");<a name="line.334"></a>
<span class="sourceLineNo">335</span> }<a name="line.335"></a>
<span class="sourceLineNo">336</span><a name="line.336"></a>
<span class="sourceLineNo">337</span> return projectData;<a name="line.337"></a>
<span class="sourceLineNo">338</span> }<a name="line.338"></a>
<span class="sourceLineNo">339</span><a name="line.339"></a>
<span class="sourceLineNo">340</span>}<a name="line.340"></a>
</pre>
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