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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Why are you trying to read it from your classpath? As it wasn’t in your classpath when you loaded java doesn’t know about it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">You already have the File object so you can just make a FileReader object from that.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Reader source = new FileReader(drlFile);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Don’t forget to close your reader when you are done with it, ideally in a finally block so that ti gets closed even if there is an IOException while reading
from it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Also you really really really shouldn’t write files into your source directory as it means that running a clean doesn’t work properly, is likely to confuse
eclipse and lead to all sorts of other funnies like dynamic files suddenly appearing in your classpath... For unit tests write it to “target/testOutput” or similar.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Hope this helps,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Thomas<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:
"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;
font-family:"Tahoma","sans-serif""> rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org]
<b>On Behalf Of </b>Fnu Mahalakshmi<br>
<b>Sent:</b> 15 June 2010 22:05<br>
<b>To:</b> 'rules-users@lists.jboss.org'<br>
<b>Subject:</b> [rules-users] Weird error with rule files<o:p></o:p></span></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">When I run my project – I have brl and drl rule files.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">When I run it for the first time: I am converting brl to drl files.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">I get this error<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:red">Exception in thread "main"
</span><u><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:navy">java.lang.NullPointerException</span></u><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:red"> at java.io.Reader.<init>(Unknown Source)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:red"> at java.io.InputStreamReader.<init>(Unknown Source)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:red"> at com.org.RuleRunner.loadRuleFile(</span><u><span lang="EN-US" style="font-size:
10.0pt;font-family:"Courier New";color:navy">RuleRunner.java:87</span></u><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:red">)
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:red"> at com.org.RuleRunner.loadRules(</span><u><span lang="EN-US" style="font-size:
10.0pt;font-family:"Courier New";color:navy">RuleRunner.java:44</span></u><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:red">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:red"> at com.org.RuleRunner.runStatelessRules(</span><u><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:navy">RuleRunner.java:108</span></u><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:red">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:red"> at com.org.RulesTest.main(</span><u><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:navy">RulesTest.java:40</span></u><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:red">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">But after I run it for the first time and the rule.drl (converted file from brl to drl) exists in my directory – I run it again and then the program runs fine.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">So number of .brl files that many number of exceptions(same as above) and then program runs.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Why is this happening?? Should it not create the file and load it into the rulebase?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">My code for converting from brl to drl is :<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">
</span><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:#7F0055">try</span></b><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:black">{</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> BRXMLPersistence read = (BRXMLPersistence) BRXMLPersistence.<i>getInstance</i>();</span><span lang="EN-US" style="font-size:
10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> BRDRLPersistence write = (BRDRLPersistence) BRDRLPersistence.<i>getInstance</i>();</span><span lang="EN-US" style="font-size:
10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> brl = FileUtils.<i>readFileToString</i>(file);
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> System.</span><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:#0000C0">out</span></i><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:black">.println(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#2A00FF">"File
content: "</span><span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New";color:black"> + brl);
</span><span lang="EN-US" style="font-size:
10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> outputDRL = write.marshal(read.unmarshal(brl));</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> String drlFilePath =
</span><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:#2A00FF">"src/main/rules"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">+rulesFiles +</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:#2A00FF">".drl"</span><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:black">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> System.</span><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:#0000C0">out</span></i><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:black">.println(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#2A00FF">"drlFilePath
"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black">+drlFilePath +</span><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:#2A00FF">"rulesFiles "</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">+rulesFiles);</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> String path = rulesFiles+</span><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:#2A00FF">".drl"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> System.</span><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:#0000C0">out</span></i><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:black">.println(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#2A00FF">"path
"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black">+path);</span><span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> System.</span><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:#0000C0">out</span></i><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:black">.println(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#2A00FF">"drlfile
"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black">+drlFilePath);</span><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> drlFile =
</span><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:#7F0055">new</span></b><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:black"> File(drlFilePath);</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> FileUtils.<i>writeStringToFile</i>(drlFile, outputDRL);</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> Reader source =
</span><b><span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New";color:#7F0055">new</span></b><span lang="EN-US" style="font-size:
10.0pt;font-family:"Courier New";color:black"> InputStreamReader( RuleRunner.</span><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#7F0055">class</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">.getResourceAsStream(path)
); // error is here</span><span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> addRulesToThisPackage.addPackageFromDrl(source);</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> }</span><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:#7F0055">catch</span></b><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:black">
(IOException e) {</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> e.printStackTrace();
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> }
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black">Any idea why this problem?? Is there some error in my code above????<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black">Please help.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black">Thank you<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black">M</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p></o:p></span></p>
<div class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">
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