| <HTML> |
| <BODY BGCOLOR="white"> |
| <PRE> |
| <FONT color="green">001</FONT> /*<a name="line.1"></a> |
| <FONT color="green">002</FONT> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <FONT color="green">003</FONT> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <FONT color="green">004</FONT> * distributed with this work for additional information<a name="line.4"></a> |
| <FONT color="green">005</FONT> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <FONT color="green">006</FONT> * to you under the Apache License, Version 2.0 (the "License");<a name="line.6"></a> |
| <FONT color="green">007</FONT> * you may not use this file except in compliance with the License.<a name="line.7"></a> |
| <FONT color="green">008</FONT> * You may obtain a copy of the License at<a name="line.8"></a> |
| <FONT color="green">009</FONT> *<a name="line.9"></a> |
| <FONT color="green">010</FONT> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <FONT color="green">011</FONT> *<a name="line.11"></a> |
| <FONT color="green">012</FONT> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <FONT color="green">013</FONT> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <FONT color="green">014</FONT> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <FONT color="green">015</FONT> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <FONT color="green">016</FONT> * limitations under the License.<a name="line.16"></a> |
| <FONT color="green">017</FONT> */<a name="line.17"></a> |
| <FONT color="green">018</FONT> /*<a name="line.18"></a> |
| <FONT color="green">019</FONT> * $Id: ObjectFactory.java 1225583 2011-12-29 16:08:00Z mrglavas $<a name="line.19"></a> |
| <FONT color="green">020</FONT> */<a name="line.20"></a> |
| <FONT color="green">021</FONT> <a name="line.21"></a> |
| <FONT color="green">022</FONT> package org.apache.xalan.extensions;<a name="line.22"></a> |
| <FONT color="green">023</FONT> <a name="line.23"></a> |
| <FONT color="green">024</FONT> import java.io.InputStream;<a name="line.24"></a> |
| <FONT color="green">025</FONT> import java.io.IOException;<a name="line.25"></a> |
| <FONT color="green">026</FONT> import java.io.File;<a name="line.26"></a> |
| <FONT color="green">027</FONT> import java.io.FileInputStream;<a name="line.27"></a> |
| <FONT color="green">028</FONT> <a name="line.28"></a> |
| <FONT color="green">029</FONT> import java.util.Properties;<a name="line.29"></a> |
| <FONT color="green">030</FONT> import java.io.BufferedReader;<a name="line.30"></a> |
| <FONT color="green">031</FONT> import java.io.InputStreamReader;<a name="line.31"></a> |
| <FONT color="green">032</FONT> <a name="line.32"></a> |
| <FONT color="green">033</FONT> /**<a name="line.33"></a> |
| <FONT color="green">034</FONT> * This class is duplicated for each JAXP subpackage so keep it in sync.<a name="line.34"></a> |
| <FONT color="green">035</FONT> * It is package private and therefore is not exposed as part of the JAXP<a name="line.35"></a> |
| <FONT color="green">036</FONT> * API.<a name="line.36"></a> |
| <FONT color="green">037</FONT> * <p><a name="line.37"></a> |
| <FONT color="green">038</FONT> * This code is designed to implement the JAXP 1.1 spec pluggability<a name="line.38"></a> |
| <FONT color="green">039</FONT> * feature and is designed to run on JDK version 1.1 and<a name="line.39"></a> |
| <FONT color="green">040</FONT> * later, and to compile on JDK 1.2 and onward. <a name="line.40"></a> |
| <FONT color="green">041</FONT> * The code also runs both as part of an unbundled jar file and<a name="line.41"></a> |
| <FONT color="green">042</FONT> * when bundled as part of the JDK.<a name="line.42"></a> |
| <FONT color="green">043</FONT> * <p><a name="line.43"></a> |
| <FONT color="green">044</FONT> * This class was moved from the <code>javax.xml.parsers.ObjectFactory</code><a name="line.44"></a> |
| <FONT color="green">045</FONT> * class and modified to be used as a general utility for creating objects <a name="line.45"></a> |
| <FONT color="green">046</FONT> * dynamically.<a name="line.46"></a> |
| <FONT color="green">047</FONT> *<a name="line.47"></a> |
| <FONT color="green">048</FONT> * @version $Id: ObjectFactory.java 1225583 2011-12-29 16:08:00Z mrglavas $<a name="line.48"></a> |
| <FONT color="green">049</FONT> */<a name="line.49"></a> |
| <FONT color="green">050</FONT> final class ObjectFactory {<a name="line.50"></a> |
| <FONT color="green">051</FONT> <a name="line.51"></a> |
| <FONT color="green">052</FONT> //<a name="line.52"></a> |
| <FONT color="green">053</FONT> // Constants<a name="line.53"></a> |
| <FONT color="green">054</FONT> //<a name="line.54"></a> |
| <FONT color="green">055</FONT> <a name="line.55"></a> |
| <FONT color="green">056</FONT> // name of default properties file to look for in JDK's jre/lib directory<a name="line.56"></a> |
| <FONT color="green">057</FONT> private static final String DEFAULT_PROPERTIES_FILENAME =<a name="line.57"></a> |
| <FONT color="green">058</FONT> "xalan.properties";<a name="line.58"></a> |
| <FONT color="green">059</FONT> <a name="line.59"></a> |
| <FONT color="green">060</FONT> private static final String SERVICES_PATH = "META-INF/services/";<a name="line.60"></a> |
| <FONT color="green">061</FONT> <a name="line.61"></a> |
| <FONT color="green">062</FONT> /** Set to true for debugging */<a name="line.62"></a> |
| <FONT color="green">063</FONT> private static final boolean DEBUG = false;<a name="line.63"></a> |
| <FONT color="green">064</FONT> <a name="line.64"></a> |
| <FONT color="green">065</FONT> /** cache the contents of the xalan.properties file.<a name="line.65"></a> |
| <FONT color="green">066</FONT> * Until an attempt has been made to read this file, this will<a name="line.66"></a> |
| <FONT color="green">067</FONT> * be null; if the file does not exist or we encounter some other error<a name="line.67"></a> |
| <FONT color="green">068</FONT> * during the read, this will be empty.<a name="line.68"></a> |
| <FONT color="green">069</FONT> */<a name="line.69"></a> |
| <FONT color="green">070</FONT> private static Properties fXalanProperties = null;<a name="line.70"></a> |
| <FONT color="green">071</FONT> <a name="line.71"></a> |
| <FONT color="green">072</FONT> /***<a name="line.72"></a> |
| <FONT color="green">073</FONT> * Cache the time stamp of the xalan.properties file so<a name="line.73"></a> |
| <FONT color="green">074</FONT> * that we know if it's been modified and can invalidate<a name="line.74"></a> |
| <FONT color="green">075</FONT> * the cache when necessary.<a name="line.75"></a> |
| <FONT color="green">076</FONT> */<a name="line.76"></a> |
| <FONT color="green">077</FONT> private static long fLastModified = -1;<a name="line.77"></a> |
| <FONT color="green">078</FONT> <a name="line.78"></a> |
| <FONT color="green">079</FONT> //<a name="line.79"></a> |
| <FONT color="green">080</FONT> // Public static methods<a name="line.80"></a> |
| <FONT color="green">081</FONT> //<a name="line.81"></a> |
| <FONT color="green">082</FONT> <a name="line.82"></a> |
| <FONT color="green">083</FONT> /**<a name="line.83"></a> |
| <FONT color="green">084</FONT> * Finds the implementation Class object in the specified order. The<a name="line.84"></a> |
| <FONT color="green">085</FONT> * specified order is the following:<a name="line.85"></a> |
| <FONT color="green">086</FONT> * <ol><a name="line.86"></a> |
| <FONT color="green">087</FONT> * <li>query the system property using <code>System.getProperty</code><a name="line.87"></a> |
| <FONT color="green">088</FONT> * <li>read <code>META-INF/services/<i>factoryId</i></code> file<a name="line.88"></a> |
| <FONT color="green">089</FONT> * <li>use fallback classname<a name="line.89"></a> |
| <FONT color="green">090</FONT> * </ol><a name="line.90"></a> |
| <FONT color="green">091</FONT> *<a name="line.91"></a> |
| <FONT color="green">092</FONT> * @return instance of factory, never null<a name="line.92"></a> |
| <FONT color="green">093</FONT> *<a name="line.93"></a> |
| <FONT color="green">094</FONT> * @param factoryId Name of the factory to find, same as<a name="line.94"></a> |
| <FONT color="green">095</FONT> * a property name<a name="line.95"></a> |
| <FONT color="green">096</FONT> * @param fallbackClassName Implementation class name, if nothing else<a name="line.96"></a> |
| <FONT color="green">097</FONT> * is found. Use null to mean no fallback.<a name="line.97"></a> |
| <FONT color="green">098</FONT> *<a name="line.98"></a> |
| <FONT color="green">099</FONT> * @exception ObjectFactory.ConfigurationError<a name="line.99"></a> |
| <FONT color="green">100</FONT> */<a name="line.100"></a> |
| <FONT color="green">101</FONT> static Object createObject(String factoryId, String fallbackClassName)<a name="line.101"></a> |
| <FONT color="green">102</FONT> throws ConfigurationError {<a name="line.102"></a> |
| <FONT color="green">103</FONT> return createObject(factoryId, null, fallbackClassName);<a name="line.103"></a> |
| <FONT color="green">104</FONT> } // createObject(String,String):Object<a name="line.104"></a> |
| <FONT color="green">105</FONT> <a name="line.105"></a> |
| <FONT color="green">106</FONT> /**<a name="line.106"></a> |
| <FONT color="green">107</FONT> * Finds the implementation Class object in the specified order. The<a name="line.107"></a> |
| <FONT color="green">108</FONT> * specified order is the following:<a name="line.108"></a> |
| <FONT color="green">109</FONT> * <ol><a name="line.109"></a> |
| <FONT color="green">110</FONT> * <li>query the system property using <code>System.getProperty</code><a name="line.110"></a> |
| <FONT color="green">111</FONT> * <li>read <code>$java.home/lib/<i>propertiesFilename</i></code> file<a name="line.111"></a> |
| <FONT color="green">112</FONT> * <li>read <code>META-INF/services/<i>factoryId</i></code> file<a name="line.112"></a> |
| <FONT color="green">113</FONT> * <li>use fallback classname<a name="line.113"></a> |
| <FONT color="green">114</FONT> * </ol><a name="line.114"></a> |
| <FONT color="green">115</FONT> *<a name="line.115"></a> |
| <FONT color="green">116</FONT> * @return instance of factory, never null<a name="line.116"></a> |
| <FONT color="green">117</FONT> *<a name="line.117"></a> |
| <FONT color="green">118</FONT> * @param factoryId Name of the factory to find, same as<a name="line.118"></a> |
| <FONT color="green">119</FONT> * a property name<a name="line.119"></a> |
| <FONT color="green">120</FONT> * @param propertiesFilename The filename in the $java.home/lib directory<a name="line.120"></a> |
| <FONT color="green">121</FONT> * of the properties file. If none specified,<a name="line.121"></a> |
| <FONT color="green">122</FONT> * ${java.home}/lib/xalan.properties will be used.<a name="line.122"></a> |
| <FONT color="green">123</FONT> * @param fallbackClassName Implementation class name, if nothing else<a name="line.123"></a> |
| <FONT color="green">124</FONT> * is found. Use null to mean no fallback.<a name="line.124"></a> |
| <FONT color="green">125</FONT> *<a name="line.125"></a> |
| <FONT color="green">126</FONT> * @exception ObjectFactory.ConfigurationError<a name="line.126"></a> |
| <FONT color="green">127</FONT> */<a name="line.127"></a> |
| <FONT color="green">128</FONT> static Object createObject(String factoryId, <a name="line.128"></a> |
| <FONT color="green">129</FONT> String propertiesFilename,<a name="line.129"></a> |
| <FONT color="green">130</FONT> String fallbackClassName)<a name="line.130"></a> |
| <FONT color="green">131</FONT> throws ConfigurationError<a name="line.131"></a> |
| <FONT color="green">132</FONT> {<a name="line.132"></a> |
| <FONT color="green">133</FONT> Class factoryClass = lookUpFactoryClass(factoryId,<a name="line.133"></a> |
| <FONT color="green">134</FONT> propertiesFilename,<a name="line.134"></a> |
| <FONT color="green">135</FONT> fallbackClassName);<a name="line.135"></a> |
| <FONT color="green">136</FONT> <a name="line.136"></a> |
| <FONT color="green">137</FONT> if (factoryClass == null) {<a name="line.137"></a> |
| <FONT color="green">138</FONT> throw new ConfigurationError(<a name="line.138"></a> |
| <FONT color="green">139</FONT> "Provider for " + factoryId + " cannot be found", null);<a name="line.139"></a> |
| <FONT color="green">140</FONT> }<a name="line.140"></a> |
| <FONT color="green">141</FONT> <a name="line.141"></a> |
| <FONT color="green">142</FONT> try{<a name="line.142"></a> |
| <FONT color="green">143</FONT> Object instance = factoryClass.newInstance();<a name="line.143"></a> |
| <FONT color="green">144</FONT> debugPrintln("created new instance of factory " + factoryId);<a name="line.144"></a> |
| <FONT color="green">145</FONT> return instance;<a name="line.145"></a> |
| <FONT color="green">146</FONT> } catch (Exception x) {<a name="line.146"></a> |
| <FONT color="green">147</FONT> throw new ConfigurationError(<a name="line.147"></a> |
| <FONT color="green">148</FONT> "Provider for factory " + factoryId<a name="line.148"></a> |
| <FONT color="green">149</FONT> + " could not be instantiated: " + x, x);<a name="line.149"></a> |
| <FONT color="green">150</FONT> }<a name="line.150"></a> |
| <FONT color="green">151</FONT> } // createObject(String,String,String):Object<a name="line.151"></a> |
| <FONT color="green">152</FONT> <a name="line.152"></a> |
| <FONT color="green">153</FONT> /**<a name="line.153"></a> |
| <FONT color="green">154</FONT> * Finds the implementation Class object in the specified order. The<a name="line.154"></a> |
| <FONT color="green">155</FONT> * specified order is the following:<a name="line.155"></a> |
| <FONT color="green">156</FONT> * <ol><a name="line.156"></a> |
| <FONT color="green">157</FONT> * <li>query the system property using <code>System.getProperty</code><a name="line.157"></a> |
| <FONT color="green">158</FONT> * <li>read <code>$java.home/lib/<i>propertiesFilename</i></code> file<a name="line.158"></a> |
| <FONT color="green">159</FONT> * <li>read <code>META-INF/services/<i>factoryId</i></code> file<a name="line.159"></a> |
| <FONT color="green">160</FONT> * <li>use fallback classname<a name="line.160"></a> |
| <FONT color="green">161</FONT> * </ol><a name="line.161"></a> |
| <FONT color="green">162</FONT> *<a name="line.162"></a> |
| <FONT color="green">163</FONT> * @return Class object of factory, never null<a name="line.163"></a> |
| <FONT color="green">164</FONT> *<a name="line.164"></a> |
| <FONT color="green">165</FONT> * @param factoryId Name of the factory to find, same as<a name="line.165"></a> |
| <FONT color="green">166</FONT> * a property name<a name="line.166"></a> |
| <FONT color="green">167</FONT> * @param propertiesFilename The filename in the $java.home/lib directory<a name="line.167"></a> |
| <FONT color="green">168</FONT> * of the properties file. If none specified,<a name="line.168"></a> |
| <FONT color="green">169</FONT> * ${java.home}/lib/xalan.properties will be used.<a name="line.169"></a> |
| <FONT color="green">170</FONT> * @param fallbackClassName Implementation class name, if nothing else<a name="line.170"></a> |
| <FONT color="green">171</FONT> * is found. Use null to mean no fallback.<a name="line.171"></a> |
| <FONT color="green">172</FONT> *<a name="line.172"></a> |
| <FONT color="green">173</FONT> * @exception ObjectFactory.ConfigurationError<a name="line.173"></a> |
| <FONT color="green">174</FONT> */<a name="line.174"></a> |
| <FONT color="green">175</FONT> static Class lookUpFactoryClass(String factoryId) <a name="line.175"></a> |
| <FONT color="green">176</FONT> throws ConfigurationError<a name="line.176"></a> |
| <FONT color="green">177</FONT> {<a name="line.177"></a> |
| <FONT color="green">178</FONT> return lookUpFactoryClass(factoryId, null, null);<a name="line.178"></a> |
| <FONT color="green">179</FONT> } // lookUpFactoryClass(String):Class<a name="line.179"></a> |
| <FONT color="green">180</FONT> <a name="line.180"></a> |
| <FONT color="green">181</FONT> /**<a name="line.181"></a> |
| <FONT color="green">182</FONT> * Finds the implementation Class object in the specified order. The<a name="line.182"></a> |
| <FONT color="green">183</FONT> * specified order is the following:<a name="line.183"></a> |
| <FONT color="green">184</FONT> * <ol><a name="line.184"></a> |
| <FONT color="green">185</FONT> * <li>query the system property using <code>System.getProperty</code><a name="line.185"></a> |
| <FONT color="green">186</FONT> * <li>read <code>$java.home/lib/<i>propertiesFilename</i></code> file<a name="line.186"></a> |
| <FONT color="green">187</FONT> * <li>read <code>META-INF/services/<i>factoryId</i></code> file<a name="line.187"></a> |
| <FONT color="green">188</FONT> * <li>use fallback classname<a name="line.188"></a> |
| <FONT color="green">189</FONT> * </ol><a name="line.189"></a> |
| <FONT color="green">190</FONT> *<a name="line.190"></a> |
| <FONT color="green">191</FONT> * @return Class object that provides factory service, never null<a name="line.191"></a> |
| <FONT color="green">192</FONT> *<a name="line.192"></a> |
| <FONT color="green">193</FONT> * @param factoryId Name of the factory to find, same as<a name="line.193"></a> |
| <FONT color="green">194</FONT> * a property name<a name="line.194"></a> |
| <FONT color="green">195</FONT> * @param propertiesFilename The filename in the $java.home/lib directory<a name="line.195"></a> |
| <FONT color="green">196</FONT> * of the properties file. If none specified,<a name="line.196"></a> |
| <FONT color="green">197</FONT> * ${java.home}/lib/xalan.properties will be used.<a name="line.197"></a> |
| <FONT color="green">198</FONT> * @param fallbackClassName Implementation class name, if nothing else<a name="line.198"></a> |
| <FONT color="green">199</FONT> * is found. Use null to mean no fallback.<a name="line.199"></a> |
| <FONT color="green">200</FONT> *<a name="line.200"></a> |
| <FONT color="green">201</FONT> * @exception ObjectFactory.ConfigurationError<a name="line.201"></a> |
| <FONT color="green">202</FONT> */<a name="line.202"></a> |
| <FONT color="green">203</FONT> static Class lookUpFactoryClass(String factoryId,<a name="line.203"></a> |
| <FONT color="green">204</FONT> String propertiesFilename,<a name="line.204"></a> |
| <FONT color="green">205</FONT> String fallbackClassName)<a name="line.205"></a> |
| <FONT color="green">206</FONT> throws ConfigurationError<a name="line.206"></a> |
| <FONT color="green">207</FONT> {<a name="line.207"></a> |
| <FONT color="green">208</FONT> String factoryClassName = lookUpFactoryClassName(factoryId,<a name="line.208"></a> |
| <FONT color="green">209</FONT> propertiesFilename,<a name="line.209"></a> |
| <FONT color="green">210</FONT> fallbackClassName);<a name="line.210"></a> |
| <FONT color="green">211</FONT> ClassLoader cl = findClassLoader();<a name="line.211"></a> |
| <FONT color="green">212</FONT> <a name="line.212"></a> |
| <FONT color="green">213</FONT> if (factoryClassName == null) {<a name="line.213"></a> |
| <FONT color="green">214</FONT> factoryClassName = fallbackClassName;<a name="line.214"></a> |
| <FONT color="green">215</FONT> }<a name="line.215"></a> |
| <FONT color="green">216</FONT> <a name="line.216"></a> |
| <FONT color="green">217</FONT> // assert(className != null);<a name="line.217"></a> |
| <FONT color="green">218</FONT> try{<a name="line.218"></a> |
| <FONT color="green">219</FONT> Class providerClass = findProviderClass(factoryClassName,<a name="line.219"></a> |
| <FONT color="green">220</FONT> cl,<a name="line.220"></a> |
| <FONT color="green">221</FONT> true);<a name="line.221"></a> |
| <FONT color="green">222</FONT> debugPrintln("created new instance of " + providerClass +<a name="line.222"></a> |
| <FONT color="green">223</FONT> " using ClassLoader: " + cl);<a name="line.223"></a> |
| <FONT color="green">224</FONT> return providerClass;<a name="line.224"></a> |
| <FONT color="green">225</FONT> } catch (ClassNotFoundException x) {<a name="line.225"></a> |
| <FONT color="green">226</FONT> throw new ConfigurationError(<a name="line.226"></a> |
| <FONT color="green">227</FONT> "Provider " + factoryClassName + " not found", x);<a name="line.227"></a> |
| <FONT color="green">228</FONT> } catch (Exception x) {<a name="line.228"></a> |
| <FONT color="green">229</FONT> throw new ConfigurationError(<a name="line.229"></a> |
| <FONT color="green">230</FONT> "Provider "+factoryClassName+" could not be instantiated: "+x,<a name="line.230"></a> |
| <FONT color="green">231</FONT> x);<a name="line.231"></a> |
| <FONT color="green">232</FONT> }<a name="line.232"></a> |
| <FONT color="green">233</FONT> } // lookUpFactoryClass(String,String,String):Class<a name="line.233"></a> |
| <FONT color="green">234</FONT> <a name="line.234"></a> |
| <FONT color="green">235</FONT> /**<a name="line.235"></a> |
| <FONT color="green">236</FONT> * Finds the name of the required implementation class in the specified<a name="line.236"></a> |
| <FONT color="green">237</FONT> * order. The specified order is the following:<a name="line.237"></a> |
| <FONT color="green">238</FONT> * <ol><a name="line.238"></a> |
| <FONT color="green">239</FONT> * <li>query the system property using <code>System.getProperty</code><a name="line.239"></a> |
| <FONT color="green">240</FONT> * <li>read <code>$java.home/lib/<i>propertiesFilename</i></code> file<a name="line.240"></a> |
| <FONT color="green">241</FONT> * <li>read <code>META-INF/services/<i>factoryId</i></code> file<a name="line.241"></a> |
| <FONT color="green">242</FONT> * <li>use fallback classname<a name="line.242"></a> |
| <FONT color="green">243</FONT> * </ol><a name="line.243"></a> |
| <FONT color="green">244</FONT> *<a name="line.244"></a> |
| <FONT color="green">245</FONT> * @return name of class that provides factory service, never null<a name="line.245"></a> |
| <FONT color="green">246</FONT> *<a name="line.246"></a> |
| <FONT color="green">247</FONT> * @param factoryId Name of the factory to find, same as<a name="line.247"></a> |
| <FONT color="green">248</FONT> * a property name<a name="line.248"></a> |
| <FONT color="green">249</FONT> * @param propertiesFilename The filename in the $java.home/lib directory<a name="line.249"></a> |
| <FONT color="green">250</FONT> * of the properties file. If none specified,<a name="line.250"></a> |
| <FONT color="green">251</FONT> * ${java.home}/lib/xalan.properties will be used.<a name="line.251"></a> |
| <FONT color="green">252</FONT> * @param fallbackClassName Implementation class name, if nothing else<a name="line.252"></a> |
| <FONT color="green">253</FONT> * is found. Use null to mean no fallback.<a name="line.253"></a> |
| <FONT color="green">254</FONT> *<a name="line.254"></a> |
| <FONT color="green">255</FONT> * @exception ObjectFactory.ConfigurationError<a name="line.255"></a> |
| <FONT color="green">256</FONT> */<a name="line.256"></a> |
| <FONT color="green">257</FONT> static String lookUpFactoryClassName(String factoryId,<a name="line.257"></a> |
| <FONT color="green">258</FONT> String propertiesFilename,<a name="line.258"></a> |
| <FONT color="green">259</FONT> String fallbackClassName)<a name="line.259"></a> |
| <FONT color="green">260</FONT> {<a name="line.260"></a> |
| <FONT color="green">261</FONT> // Use the system property first<a name="line.261"></a> |
| <FONT color="green">262</FONT> try {<a name="line.262"></a> |
| <FONT color="green">263</FONT> String systemProp = SecuritySupport.getSystemProperty(factoryId);<a name="line.263"></a> |
| <FONT color="green">264</FONT> if (systemProp != null) {<a name="line.264"></a> |
| <FONT color="green">265</FONT> debugPrintln("found system property, value=" + systemProp);<a name="line.265"></a> |
| <FONT color="green">266</FONT> return systemProp;<a name="line.266"></a> |
| <FONT color="green">267</FONT> }<a name="line.267"></a> |
| <FONT color="green">268</FONT> } catch (SecurityException se) {<a name="line.268"></a> |
| <FONT color="green">269</FONT> // Ignore and continue w/ next location<a name="line.269"></a> |
| <FONT color="green">270</FONT> }<a name="line.270"></a> |
| <FONT color="green">271</FONT> <a name="line.271"></a> |
| <FONT color="green">272</FONT> // Try to read from propertiesFilename, or<a name="line.272"></a> |
| <FONT color="green">273</FONT> // $java.home/lib/xalan.properties<a name="line.273"></a> |
| <FONT color="green">274</FONT> String factoryClassName = null;<a name="line.274"></a> |
| <FONT color="green">275</FONT> // no properties file name specified; use<a name="line.275"></a> |
| <FONT color="green">276</FONT> // $JAVA_HOME/lib/xalan.properties:<a name="line.276"></a> |
| <FONT color="green">277</FONT> if (propertiesFilename == null) {<a name="line.277"></a> |
| <FONT color="green">278</FONT> File propertiesFile = null;<a name="line.278"></a> |
| <FONT color="green">279</FONT> boolean propertiesFileExists = false;<a name="line.279"></a> |
| <FONT color="green">280</FONT> try {<a name="line.280"></a> |
| <FONT color="green">281</FONT> String javah = SecuritySupport.getSystemProperty("java.home");<a name="line.281"></a> |
| <FONT color="green">282</FONT> propertiesFilename = javah + File.separator +<a name="line.282"></a> |
| <FONT color="green">283</FONT> "lib" + File.separator + DEFAULT_PROPERTIES_FILENAME;<a name="line.283"></a> |
| <FONT color="green">284</FONT> propertiesFile = new File(propertiesFilename);<a name="line.284"></a> |
| <FONT color="green">285</FONT> propertiesFileExists = SecuritySupport.getFileExists(propertiesFile);<a name="line.285"></a> |
| <FONT color="green">286</FONT> } catch (SecurityException e) {<a name="line.286"></a> |
| <FONT color="green">287</FONT> // try again...<a name="line.287"></a> |
| <FONT color="green">288</FONT> fLastModified = -1;<a name="line.288"></a> |
| <FONT color="green">289</FONT> fXalanProperties = null;<a name="line.289"></a> |
| <FONT color="green">290</FONT> }<a name="line.290"></a> |
| <FONT color="green">291</FONT> <a name="line.291"></a> |
| <FONT color="green">292</FONT> synchronized (ObjectFactory.class) {<a name="line.292"></a> |
| <FONT color="green">293</FONT> boolean loadProperties = false;<a name="line.293"></a> |
| <FONT color="green">294</FONT> FileInputStream fis = null;<a name="line.294"></a> |
| <FONT color="green">295</FONT> try {<a name="line.295"></a> |
| <FONT color="green">296</FONT> // file existed last time<a name="line.296"></a> |
| <FONT color="green">297</FONT> if(fLastModified >= 0) {<a name="line.297"></a> |
| <FONT color="green">298</FONT> if(propertiesFileExists &&<a name="line.298"></a> |
| <FONT color="green">299</FONT> (fLastModified < (fLastModified = SecuritySupport.getLastModified(propertiesFile)))) {<a name="line.299"></a> |
| <FONT color="green">300</FONT> loadProperties = true;<a name="line.300"></a> |
| <FONT color="green">301</FONT> } else {<a name="line.301"></a> |
| <FONT color="green">302</FONT> // file has stopped existing...<a name="line.302"></a> |
| <FONT color="green">303</FONT> if(!propertiesFileExists) {<a name="line.303"></a> |
| <FONT color="green">304</FONT> fLastModified = -1;<a name="line.304"></a> |
| <FONT color="green">305</FONT> fXalanProperties = null;<a name="line.305"></a> |
| <FONT color="green">306</FONT> } // else, file wasn't modified!<a name="line.306"></a> |
| <FONT color="green">307</FONT> }<a name="line.307"></a> |
| <FONT color="green">308</FONT> } else {<a name="line.308"></a> |
| <FONT color="green">309</FONT> // file has started to exist:<a name="line.309"></a> |
| <FONT color="green">310</FONT> if(propertiesFileExists) {<a name="line.310"></a> |
| <FONT color="green">311</FONT> loadProperties = true;<a name="line.311"></a> |
| <FONT color="green">312</FONT> fLastModified = SecuritySupport.getLastModified(propertiesFile);<a name="line.312"></a> |
| <FONT color="green">313</FONT> } // else, nothing's changed<a name="line.313"></a> |
| <FONT color="green">314</FONT> }<a name="line.314"></a> |
| <FONT color="green">315</FONT> if(loadProperties) {<a name="line.315"></a> |
| <FONT color="green">316</FONT> // must never have attempted to read xalan.properties<a name="line.316"></a> |
| <FONT color="green">317</FONT> // before (or it's outdeated)<a name="line.317"></a> |
| <FONT color="green">318</FONT> fXalanProperties = new Properties();<a name="line.318"></a> |
| <FONT color="green">319</FONT> fis = SecuritySupport.getFileInputStream(propertiesFile);<a name="line.319"></a> |
| <FONT color="green">320</FONT> fXalanProperties.load(fis);<a name="line.320"></a> |
| <FONT color="green">321</FONT> }<a name="line.321"></a> |
| <FONT color="green">322</FONT> } catch (Exception x) {<a name="line.322"></a> |
| <FONT color="green">323</FONT> fXalanProperties = null;<a name="line.323"></a> |
| <FONT color="green">324</FONT> fLastModified = -1;<a name="line.324"></a> |
| <FONT color="green">325</FONT> // assert(x instanceof FileNotFoundException<a name="line.325"></a> |
| <FONT color="green">326</FONT> // || x instanceof SecurityException)<a name="line.326"></a> |
| <FONT color="green">327</FONT> // In both cases, ignore and continue w/ next location<a name="line.327"></a> |
| <FONT color="green">328</FONT> }<a name="line.328"></a> |
| <FONT color="green">329</FONT> finally {<a name="line.329"></a> |
| <FONT color="green">330</FONT> // try to close the input stream if one was opened.<a name="line.330"></a> |
| <FONT color="green">331</FONT> if (fis != null) {<a name="line.331"></a> |
| <FONT color="green">332</FONT> try {<a name="line.332"></a> |
| <FONT color="green">333</FONT> fis.close();<a name="line.333"></a> |
| <FONT color="green">334</FONT> }<a name="line.334"></a> |
| <FONT color="green">335</FONT> // Ignore the exception.<a name="line.335"></a> |
| <FONT color="green">336</FONT> catch (IOException exc) {}<a name="line.336"></a> |
| <FONT color="green">337</FONT> }<a name="line.337"></a> |
| <FONT color="green">338</FONT> } <a name="line.338"></a> |
| <FONT color="green">339</FONT> }<a name="line.339"></a> |
| <FONT color="green">340</FONT> if(fXalanProperties != null) {<a name="line.340"></a> |
| <FONT color="green">341</FONT> factoryClassName = fXalanProperties.getProperty(factoryId);<a name="line.341"></a> |
| <FONT color="green">342</FONT> }<a name="line.342"></a> |
| <FONT color="green">343</FONT> } else {<a name="line.343"></a> |
| <FONT color="green">344</FONT> FileInputStream fis = null;<a name="line.344"></a> |
| <FONT color="green">345</FONT> try {<a name="line.345"></a> |
| <FONT color="green">346</FONT> fis = SecuritySupport.getFileInputStream(new File(propertiesFilename));<a name="line.346"></a> |
| <FONT color="green">347</FONT> Properties props = new Properties();<a name="line.347"></a> |
| <FONT color="green">348</FONT> props.load(fis);<a name="line.348"></a> |
| <FONT color="green">349</FONT> factoryClassName = props.getProperty(factoryId);<a name="line.349"></a> |
| <FONT color="green">350</FONT> } catch (Exception x) {<a name="line.350"></a> |
| <FONT color="green">351</FONT> // assert(x instanceof FileNotFoundException<a name="line.351"></a> |
| <FONT color="green">352</FONT> // || x instanceof SecurityException)<a name="line.352"></a> |
| <FONT color="green">353</FONT> // In both cases, ignore and continue w/ next location<a name="line.353"></a> |
| <FONT color="green">354</FONT> }<a name="line.354"></a> |
| <FONT color="green">355</FONT> finally {<a name="line.355"></a> |
| <FONT color="green">356</FONT> // try to close the input stream if one was opened.<a name="line.356"></a> |
| <FONT color="green">357</FONT> if (fis != null) {<a name="line.357"></a> |
| <FONT color="green">358</FONT> try {<a name="line.358"></a> |
| <FONT color="green">359</FONT> fis.close();<a name="line.359"></a> |
| <FONT color="green">360</FONT> }<a name="line.360"></a> |
| <FONT color="green">361</FONT> // Ignore the exception.<a name="line.361"></a> |
| <FONT color="green">362</FONT> catch (IOException exc) {}<a name="line.362"></a> |
| <FONT color="green">363</FONT> }<a name="line.363"></a> |
| <FONT color="green">364</FONT> } <a name="line.364"></a> |
| <FONT color="green">365</FONT> }<a name="line.365"></a> |
| <FONT color="green">366</FONT> if (factoryClassName != null) {<a name="line.366"></a> |
| <FONT color="green">367</FONT> debugPrintln("found in " + propertiesFilename + ", value="<a name="line.367"></a> |
| <FONT color="green">368</FONT> + factoryClassName);<a name="line.368"></a> |
| <FONT color="green">369</FONT> return factoryClassName;<a name="line.369"></a> |
| <FONT color="green">370</FONT> }<a name="line.370"></a> |
| <FONT color="green">371</FONT> <a name="line.371"></a> |
| <FONT color="green">372</FONT> // Try Jar Service Provider Mechanism<a name="line.372"></a> |
| <FONT color="green">373</FONT> return findJarServiceProviderName(factoryId);<a name="line.373"></a> |
| <FONT color="green">374</FONT> } // lookUpFactoryClass(String,String):String<a name="line.374"></a> |
| <FONT color="green">375</FONT> <a name="line.375"></a> |
| <FONT color="green">376</FONT> //<a name="line.376"></a> |
| <FONT color="green">377</FONT> // Private static methods<a name="line.377"></a> |
| <FONT color="green">378</FONT> //<a name="line.378"></a> |
| <FONT color="green">379</FONT> <a name="line.379"></a> |
| <FONT color="green">380</FONT> /** Prints a message to standard error if debugging is enabled. */<a name="line.380"></a> |
| <FONT color="green">381</FONT> private static void debugPrintln(String msg) {<a name="line.381"></a> |
| <FONT color="green">382</FONT> if (DEBUG) {<a name="line.382"></a> |
| <FONT color="green">383</FONT> System.err.println("JAXP: " + msg);<a name="line.383"></a> |
| <FONT color="green">384</FONT> }<a name="line.384"></a> |
| <FONT color="green">385</FONT> } // debugPrintln(String)<a name="line.385"></a> |
| <FONT color="green">386</FONT> <a name="line.386"></a> |
| <FONT color="green">387</FONT> /**<a name="line.387"></a> |
| <FONT color="green">388</FONT> * Figure out which ClassLoader to use. For JDK 1.2 and later use<a name="line.388"></a> |
| <FONT color="green">389</FONT> * the context ClassLoader.<a name="line.389"></a> |
| <FONT color="green">390</FONT> */<a name="line.390"></a> |
| <FONT color="green">391</FONT> static ClassLoader findClassLoader()<a name="line.391"></a> |
| <FONT color="green">392</FONT> throws ConfigurationError<a name="line.392"></a> |
| <FONT color="green">393</FONT> { <a name="line.393"></a> |
| <FONT color="green">394</FONT> // Figure out which ClassLoader to use for loading the provider<a name="line.394"></a> |
| <FONT color="green">395</FONT> // class. If there is a Context ClassLoader then use it.<a name="line.395"></a> |
| <FONT color="green">396</FONT> ClassLoader context = SecuritySupport.getContextClassLoader();<a name="line.396"></a> |
| <FONT color="green">397</FONT> ClassLoader system = SecuritySupport.getSystemClassLoader();<a name="line.397"></a> |
| <FONT color="green">398</FONT> <a name="line.398"></a> |
| <FONT color="green">399</FONT> ClassLoader chain = system;<a name="line.399"></a> |
| <FONT color="green">400</FONT> while (true) {<a name="line.400"></a> |
| <FONT color="green">401</FONT> if (context == chain) {<a name="line.401"></a> |
| <FONT color="green">402</FONT> // Assert: we are on JDK 1.1 or we have no Context ClassLoader<a name="line.402"></a> |
| <FONT color="green">403</FONT> // or any Context ClassLoader in chain of system classloader<a name="line.403"></a> |
| <FONT color="green">404</FONT> // (including extension ClassLoader) so extend to widest<a name="line.404"></a> |
| <FONT color="green">405</FONT> // ClassLoader (always look in system ClassLoader if Xalan<a name="line.405"></a> |
| <FONT color="green">406</FONT> // is in boot/extension/system classpath and in current<a name="line.406"></a> |
| <FONT color="green">407</FONT> // ClassLoader otherwise); normal classloaders delegate<a name="line.407"></a> |
| <FONT color="green">408</FONT> // back to system ClassLoader first so this widening doesn't<a name="line.408"></a> |
| <FONT color="green">409</FONT> // change the fact that context ClassLoader will be consulted<a name="line.409"></a> |
| <FONT color="green">410</FONT> ClassLoader current = ObjectFactory.class.getClassLoader();<a name="line.410"></a> |
| <FONT color="green">411</FONT> <a name="line.411"></a> |
| <FONT color="green">412</FONT> chain = system;<a name="line.412"></a> |
| <FONT color="green">413</FONT> while (true) {<a name="line.413"></a> |
| <FONT color="green">414</FONT> if (current == chain) {<a name="line.414"></a> |
| <FONT color="green">415</FONT> // Assert: Current ClassLoader in chain of<a name="line.415"></a> |
| <FONT color="green">416</FONT> // boot/extension/system ClassLoaders<a name="line.416"></a> |
| <FONT color="green">417</FONT> return system;<a name="line.417"></a> |
| <FONT color="green">418</FONT> }<a name="line.418"></a> |
| <FONT color="green">419</FONT> if (chain == null) {<a name="line.419"></a> |
| <FONT color="green">420</FONT> break;<a name="line.420"></a> |
| <FONT color="green">421</FONT> }<a name="line.421"></a> |
| <FONT color="green">422</FONT> chain = SecuritySupport.getParentClassLoader(chain);<a name="line.422"></a> |
| <FONT color="green">423</FONT> }<a name="line.423"></a> |
| <FONT color="green">424</FONT> <a name="line.424"></a> |
| <FONT color="green">425</FONT> // Assert: Current ClassLoader not in chain of<a name="line.425"></a> |
| <FONT color="green">426</FONT> // boot/extension/system ClassLoaders<a name="line.426"></a> |
| <FONT color="green">427</FONT> return current;<a name="line.427"></a> |
| <FONT color="green">428</FONT> }<a name="line.428"></a> |
| <FONT color="green">429</FONT> <a name="line.429"></a> |
| <FONT color="green">430</FONT> if (chain == null) {<a name="line.430"></a> |
| <FONT color="green">431</FONT> // boot ClassLoader reached<a name="line.431"></a> |
| <FONT color="green">432</FONT> break;<a name="line.432"></a> |
| <FONT color="green">433</FONT> }<a name="line.433"></a> |
| <FONT color="green">434</FONT> <a name="line.434"></a> |
| <FONT color="green">435</FONT> // Check for any extension ClassLoaders in chain up to<a name="line.435"></a> |
| <FONT color="green">436</FONT> // boot ClassLoader<a name="line.436"></a> |
| <FONT color="green">437</FONT> chain = SecuritySupport.getParentClassLoader(chain);<a name="line.437"></a> |
| <FONT color="green">438</FONT> };<a name="line.438"></a> |
| <FONT color="green">439</FONT> <a name="line.439"></a> |
| <FONT color="green">440</FONT> // Assert: Context ClassLoader not in chain of<a name="line.440"></a> |
| <FONT color="green">441</FONT> // boot/extension/system ClassLoaders<a name="line.441"></a> |
| <FONT color="green">442</FONT> return context;<a name="line.442"></a> |
| <FONT color="green">443</FONT> } // findClassLoader():ClassLoader<a name="line.443"></a> |
| <FONT color="green">444</FONT> <a name="line.444"></a> |
| <FONT color="green">445</FONT> /**<a name="line.445"></a> |
| <FONT color="green">446</FONT> * Create an instance of a class using the specified ClassLoader<a name="line.446"></a> |
| <FONT color="green">447</FONT> */ <a name="line.447"></a> |
| <FONT color="green">448</FONT> static Object newInstance(String className, ClassLoader cl,<a name="line.448"></a> |
| <FONT color="green">449</FONT> boolean doFallback)<a name="line.449"></a> |
| <FONT color="green">450</FONT> throws ConfigurationError<a name="line.450"></a> |
| <FONT color="green">451</FONT> {<a name="line.451"></a> |
| <FONT color="green">452</FONT> // assert(className != null);<a name="line.452"></a> |
| <FONT color="green">453</FONT> try{<a name="line.453"></a> |
| <FONT color="green">454</FONT> Class providerClass = findProviderClass(className, cl, doFallback);<a name="line.454"></a> |
| <FONT color="green">455</FONT> Object instance = providerClass.newInstance();<a name="line.455"></a> |
| <FONT color="green">456</FONT> debugPrintln("created new instance of " + providerClass +<a name="line.456"></a> |
| <FONT color="green">457</FONT> " using ClassLoader: " + cl);<a name="line.457"></a> |
| <FONT color="green">458</FONT> return instance;<a name="line.458"></a> |
| <FONT color="green">459</FONT> } catch (ClassNotFoundException x) {<a name="line.459"></a> |
| <FONT color="green">460</FONT> throw new ConfigurationError(<a name="line.460"></a> |
| <FONT color="green">461</FONT> "Provider " + className + " not found", x);<a name="line.461"></a> |
| <FONT color="green">462</FONT> } catch (Exception x) {<a name="line.462"></a> |
| <FONT color="green">463</FONT> throw new ConfigurationError(<a name="line.463"></a> |
| <FONT color="green">464</FONT> "Provider " + className + " could not be instantiated: " + x,<a name="line.464"></a> |
| <FONT color="green">465</FONT> x);<a name="line.465"></a> |
| <FONT color="green">466</FONT> }<a name="line.466"></a> |
| <FONT color="green">467</FONT> }<a name="line.467"></a> |
| <FONT color="green">468</FONT> <a name="line.468"></a> |
| <FONT color="green">469</FONT> /**<a name="line.469"></a> |
| <FONT color="green">470</FONT> * Find a Class using the specified ClassLoader<a name="line.470"></a> |
| <FONT color="green">471</FONT> */ <a name="line.471"></a> |
| <FONT color="green">472</FONT> static Class findProviderClass(String className, ClassLoader cl,<a name="line.472"></a> |
| <FONT color="green">473</FONT> boolean doFallback)<a name="line.473"></a> |
| <FONT color="green">474</FONT> throws ClassNotFoundException, ConfigurationError<a name="line.474"></a> |
| <FONT color="green">475</FONT> { <a name="line.475"></a> |
| <FONT color="green">476</FONT> //throw security exception if the calling thread is not allowed to access the<a name="line.476"></a> |
| <FONT color="green">477</FONT> //class. Restrict the access to the package classes as specified in java.security policy.<a name="line.477"></a> |
| <FONT color="green">478</FONT> SecurityManager security = System.getSecurityManager();<a name="line.478"></a> |
| <FONT color="green">479</FONT> try{<a name="line.479"></a> |
| <FONT color="green">480</FONT> if (security != null){<a name="line.480"></a> |
| <FONT color="green">481</FONT> final int lastDot = className.lastIndexOf('.');<a name="line.481"></a> |
| <FONT color="green">482</FONT> String packageName = className;<a name="line.482"></a> |
| <FONT color="green">483</FONT> if (lastDot != -1) packageName = className.substring(0, lastDot);<a name="line.483"></a> |
| <FONT color="green">484</FONT> security.checkPackageAccess(packageName);<a name="line.484"></a> |
| <FONT color="green">485</FONT> } <a name="line.485"></a> |
| <FONT color="green">486</FONT> }catch(SecurityException e){<a name="line.486"></a> |
| <FONT color="green">487</FONT> throw e;<a name="line.487"></a> |
| <FONT color="green">488</FONT> }<a name="line.488"></a> |
| <FONT color="green">489</FONT> <a name="line.489"></a> |
| <FONT color="green">490</FONT> Class providerClass;<a name="line.490"></a> |
| <FONT color="green">491</FONT> if (cl == null) {<a name="line.491"></a> |
| <FONT color="green">492</FONT> // XXX Use the bootstrap ClassLoader. There is no way to<a name="line.492"></a> |
| <FONT color="green">493</FONT> // load a class using the bootstrap ClassLoader that works<a name="line.493"></a> |
| <FONT color="green">494</FONT> // in both JDK 1.1 and Java 2. However, this should still<a name="line.494"></a> |
| <FONT color="green">495</FONT> // work b/c the following should be true:<a name="line.495"></a> |
| <FONT color="green">496</FONT> //<a name="line.496"></a> |
| <FONT color="green">497</FONT> // (cl == null) iff current ClassLoader == null<a name="line.497"></a> |
| <FONT color="green">498</FONT> //<a name="line.498"></a> |
| <FONT color="green">499</FONT> // Thus Class.forName(String) will use the current<a name="line.499"></a> |
| <FONT color="green">500</FONT> // ClassLoader which will be the bootstrap ClassLoader.<a name="line.500"></a> |
| <FONT color="green">501</FONT> providerClass = Class.forName(className);<a name="line.501"></a> |
| <FONT color="green">502</FONT> } else {<a name="line.502"></a> |
| <FONT color="green">503</FONT> try {<a name="line.503"></a> |
| <FONT color="green">504</FONT> providerClass = cl.loadClass(className);<a name="line.504"></a> |
| <FONT color="green">505</FONT> } catch (ClassNotFoundException x) {<a name="line.505"></a> |
| <FONT color="green">506</FONT> if (doFallback) {<a name="line.506"></a> |
| <FONT color="green">507</FONT> // Fall back to current classloader<a name="line.507"></a> |
| <FONT color="green">508</FONT> ClassLoader current = ObjectFactory.class.getClassLoader();<a name="line.508"></a> |
| <FONT color="green">509</FONT> if (current == null) {<a name="line.509"></a> |
| <FONT color="green">510</FONT> providerClass = Class.forName(className);<a name="line.510"></a> |
| <FONT color="green">511</FONT> } else if (cl != current) {<a name="line.511"></a> |
| <FONT color="green">512</FONT> cl = current;<a name="line.512"></a> |
| <FONT color="green">513</FONT> providerClass = cl.loadClass(className);<a name="line.513"></a> |
| <FONT color="green">514</FONT> } else {<a name="line.514"></a> |
| <FONT color="green">515</FONT> throw x;<a name="line.515"></a> |
| <FONT color="green">516</FONT> }<a name="line.516"></a> |
| <FONT color="green">517</FONT> } else {<a name="line.517"></a> |
| <FONT color="green">518</FONT> throw x;<a name="line.518"></a> |
| <FONT color="green">519</FONT> }<a name="line.519"></a> |
| <FONT color="green">520</FONT> }<a name="line.520"></a> |
| <FONT color="green">521</FONT> }<a name="line.521"></a> |
| <FONT color="green">522</FONT> <a name="line.522"></a> |
| <FONT color="green">523</FONT> return providerClass;<a name="line.523"></a> |
| <FONT color="green">524</FONT> }<a name="line.524"></a> |
| <FONT color="green">525</FONT> <a name="line.525"></a> |
| <FONT color="green">526</FONT> /**<a name="line.526"></a> |
| <FONT color="green">527</FONT> * Find the name of service provider using Jar Service Provider Mechanism<a name="line.527"></a> |
| <FONT color="green">528</FONT> *<a name="line.528"></a> |
| <FONT color="green">529</FONT> * @return instance of provider class if found or null<a name="line.529"></a> |
| <FONT color="green">530</FONT> */<a name="line.530"></a> |
| <FONT color="green">531</FONT> private static String findJarServiceProviderName(String factoryId)<a name="line.531"></a> |
| <FONT color="green">532</FONT> {<a name="line.532"></a> |
| <FONT color="green">533</FONT> String serviceId = SERVICES_PATH + factoryId;<a name="line.533"></a> |
| <FONT color="green">534</FONT> InputStream is = null;<a name="line.534"></a> |
| <FONT color="green">535</FONT> <a name="line.535"></a> |
| <FONT color="green">536</FONT> // First try the Context ClassLoader<a name="line.536"></a> |
| <FONT color="green">537</FONT> ClassLoader cl = findClassLoader();<a name="line.537"></a> |
| <FONT color="green">538</FONT> <a name="line.538"></a> |
| <FONT color="green">539</FONT> is = SecuritySupport.getResourceAsStream(cl, serviceId);<a name="line.539"></a> |
| <FONT color="green">540</FONT> <a name="line.540"></a> |
| <FONT color="green">541</FONT> // If no provider found then try the current ClassLoader<a name="line.541"></a> |
| <FONT color="green">542</FONT> if (is == null) {<a name="line.542"></a> |
| <FONT color="green">543</FONT> ClassLoader current = ObjectFactory.class.getClassLoader();<a name="line.543"></a> |
| <FONT color="green">544</FONT> if (cl != current) {<a name="line.544"></a> |
| <FONT color="green">545</FONT> cl = current;<a name="line.545"></a> |
| <FONT color="green">546</FONT> is = SecuritySupport.getResourceAsStream(cl, serviceId);<a name="line.546"></a> |
| <FONT color="green">547</FONT> }<a name="line.547"></a> |
| <FONT color="green">548</FONT> }<a name="line.548"></a> |
| <FONT color="green">549</FONT> <a name="line.549"></a> |
| <FONT color="green">550</FONT> if (is == null) {<a name="line.550"></a> |
| <FONT color="green">551</FONT> // No provider found<a name="line.551"></a> |
| <FONT color="green">552</FONT> return null;<a name="line.552"></a> |
| <FONT color="green">553</FONT> }<a name="line.553"></a> |
| <FONT color="green">554</FONT> <a name="line.554"></a> |
| <FONT color="green">555</FONT> debugPrintln("found jar resource=" + serviceId +<a name="line.555"></a> |
| <FONT color="green">556</FONT> " using ClassLoader: " + cl);<a name="line.556"></a> |
| <FONT color="green">557</FONT> <a name="line.557"></a> |
| <FONT color="green">558</FONT> // Read the service provider name in UTF-8 as specified in<a name="line.558"></a> |
| <FONT color="green">559</FONT> // the jar spec. Unfortunately this fails in Microsoft<a name="line.559"></a> |
| <FONT color="green">560</FONT> // VJ++, which does not implement the UTF-8<a name="line.560"></a> |
| <FONT color="green">561</FONT> // encoding. Theoretically, we should simply let it fail in<a name="line.561"></a> |
| <FONT color="green">562</FONT> // that case, since the JVM is obviously broken if it<a name="line.562"></a> |
| <FONT color="green">563</FONT> // doesn't support such a basic standard. But since there<a name="line.563"></a> |
| <FONT color="green">564</FONT> // are still some users attempting to use VJ++ for<a name="line.564"></a> |
| <FONT color="green">565</FONT> // development, we have dropped in a fallback which makes a<a name="line.565"></a> |
| <FONT color="green">566</FONT> // second attempt using the platform's default encoding. In<a name="line.566"></a> |
| <FONT color="green">567</FONT> // VJ++ this is apparently ASCII, which is a subset of<a name="line.567"></a> |
| <FONT color="green">568</FONT> // UTF-8... and since the strings we'll be reading here are<a name="line.568"></a> |
| <FONT color="green">569</FONT> // also primarily limited to the 7-bit ASCII range (at<a name="line.569"></a> |
| <FONT color="green">570</FONT> // least, in English versions), this should work well<a name="line.570"></a> |
| <FONT color="green">571</FONT> // enough to keep us on the air until we're ready to<a name="line.571"></a> |
| <FONT color="green">572</FONT> // officially decommit from VJ++. [Edited comment from<a name="line.572"></a> |
| <FONT color="green">573</FONT> // jkesselm]<a name="line.573"></a> |
| <FONT color="green">574</FONT> BufferedReader rd;<a name="line.574"></a> |
| <FONT color="green">575</FONT> try {<a name="line.575"></a> |
| <FONT color="green">576</FONT> rd = new BufferedReader(new InputStreamReader(is, "UTF-8"));<a name="line.576"></a> |
| <FONT color="green">577</FONT> } catch (java.io.UnsupportedEncodingException e) {<a name="line.577"></a> |
| <FONT color="green">578</FONT> rd = new BufferedReader(new InputStreamReader(is));<a name="line.578"></a> |
| <FONT color="green">579</FONT> }<a name="line.579"></a> |
| <FONT color="green">580</FONT> <a name="line.580"></a> |
| <FONT color="green">581</FONT> String factoryClassName = null;<a name="line.581"></a> |
| <FONT color="green">582</FONT> try {<a name="line.582"></a> |
| <FONT color="green">583</FONT> // XXX Does not handle all possible input as specified by the<a name="line.583"></a> |
| <FONT color="green">584</FONT> // Jar Service Provider specification<a name="line.584"></a> |
| <FONT color="green">585</FONT> factoryClassName = rd.readLine();<a name="line.585"></a> |
| <FONT color="green">586</FONT> } catch (IOException x) {<a name="line.586"></a> |
| <FONT color="green">587</FONT> // No provider found<a name="line.587"></a> |
| <FONT color="green">588</FONT> return null;<a name="line.588"></a> |
| <FONT color="green">589</FONT> }<a name="line.589"></a> |
| <FONT color="green">590</FONT> finally {<a name="line.590"></a> |
| <FONT color="green">591</FONT> try {<a name="line.591"></a> |
| <FONT color="green">592</FONT> // try to close the reader.<a name="line.592"></a> |
| <FONT color="green">593</FONT> rd.close();<a name="line.593"></a> |
| <FONT color="green">594</FONT> }<a name="line.594"></a> |
| <FONT color="green">595</FONT> // Ignore the exception.<a name="line.595"></a> |
| <FONT color="green">596</FONT> catch (IOException exc) {}<a name="line.596"></a> |
| <FONT color="green">597</FONT> } <a name="line.597"></a> |
| <FONT color="green">598</FONT> <a name="line.598"></a> |
| <FONT color="green">599</FONT> if (factoryClassName != null &&<a name="line.599"></a> |
| <FONT color="green">600</FONT> ! "".equals(factoryClassName)) {<a name="line.600"></a> |
| <FONT color="green">601</FONT> debugPrintln("found in resource, value="<a name="line.601"></a> |
| <FONT color="green">602</FONT> + factoryClassName);<a name="line.602"></a> |
| <FONT color="green">603</FONT> <a name="line.603"></a> |
| <FONT color="green">604</FONT> // Note: here we do not want to fall back to the current<a name="line.604"></a> |
| <FONT color="green">605</FONT> // ClassLoader because we want to avoid the case where the<a name="line.605"></a> |
| <FONT color="green">606</FONT> // resource file was found using one ClassLoader and the<a name="line.606"></a> |
| <FONT color="green">607</FONT> // provider class was instantiated using a different one.<a name="line.607"></a> |
| <FONT color="green">608</FONT> return factoryClassName;<a name="line.608"></a> |
| <FONT color="green">609</FONT> }<a name="line.609"></a> |
| <FONT color="green">610</FONT> <a name="line.610"></a> |
| <FONT color="green">611</FONT> // No provider found<a name="line.611"></a> |
| <FONT color="green">612</FONT> return null;<a name="line.612"></a> |
| <FONT color="green">613</FONT> }<a name="line.613"></a> |
| <FONT color="green">614</FONT> <a name="line.614"></a> |
| <FONT color="green">615</FONT> //<a name="line.615"></a> |
| <FONT color="green">616</FONT> // Classes<a name="line.616"></a> |
| <FONT color="green">617</FONT> //<a name="line.617"></a> |
| <FONT color="green">618</FONT> <a name="line.618"></a> |
| <FONT color="green">619</FONT> /**<a name="line.619"></a> |
| <FONT color="green">620</FONT> * A configuration error.<a name="line.620"></a> |
| <FONT color="green">621</FONT> */<a name="line.621"></a> |
| <FONT color="green">622</FONT> static class ConfigurationError <a name="line.622"></a> |
| <FONT color="green">623</FONT> extends Error {<a name="line.623"></a> |
| <FONT color="green">624</FONT> static final long serialVersionUID = 8564305128443551853L;<a name="line.624"></a> |
| <FONT color="green">625</FONT> //<a name="line.625"></a> |
| <FONT color="green">626</FONT> // Data<a name="line.626"></a> |
| <FONT color="green">627</FONT> //<a name="line.627"></a> |
| <FONT color="green">628</FONT> <a name="line.628"></a> |
| <FONT color="green">629</FONT> /** Exception. */<a name="line.629"></a> |
| <FONT color="green">630</FONT> private Exception exception;<a name="line.630"></a> |
| <FONT color="green">631</FONT> <a name="line.631"></a> |
| <FONT color="green">632</FONT> //<a name="line.632"></a> |
| <FONT color="green">633</FONT> // Constructors<a name="line.633"></a> |
| <FONT color="green">634</FONT> //<a name="line.634"></a> |
| <FONT color="green">635</FONT> <a name="line.635"></a> |
| <FONT color="green">636</FONT> /**<a name="line.636"></a> |
| <FONT color="green">637</FONT> * Construct a new instance with the specified detail string and<a name="line.637"></a> |
| <FONT color="green">638</FONT> * exception.<a name="line.638"></a> |
| <FONT color="green">639</FONT> */<a name="line.639"></a> |
| <FONT color="green">640</FONT> ConfigurationError(String msg, Exception x) {<a name="line.640"></a> |
| <FONT color="green">641</FONT> super(msg);<a name="line.641"></a> |
| <FONT color="green">642</FONT> this.exception = x;<a name="line.642"></a> |
| <FONT color="green">643</FONT> } // <init>(String,Exception)<a name="line.643"></a> |
| <FONT color="green">644</FONT> <a name="line.644"></a> |
| <FONT color="green">645</FONT> //<a name="line.645"></a> |
| <FONT color="green">646</FONT> // Public methods<a name="line.646"></a> |
| <FONT color="green">647</FONT> //<a name="line.647"></a> |
| <FONT color="green">648</FONT> <a name="line.648"></a> |
| <FONT color="green">649</FONT> /** Returns the exception associated to this error. */<a name="line.649"></a> |
| <FONT color="green">650</FONT> Exception getException() {<a name="line.650"></a> |
| <FONT color="green">651</FONT> return exception;<a name="line.651"></a> |
| <FONT color="green">652</FONT> } // getException():Exception<a name="line.652"></a> |
| <FONT color="green">653</FONT> <a name="line.653"></a> |
| <FONT color="green">654</FONT> } // class ConfigurationError<a name="line.654"></a> |
| <FONT color="green">655</FONT> <a name="line.655"></a> |
| <FONT color="green">656</FONT> } // class ObjectFactory<a name="line.656"></a> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </PRE> |
| </BODY> |
| </HTML> |
