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<p class=MsoNormal><span lang=EN-US>Hi all.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I recently had the same exception as reported
in </span><a href="https://jira.jboss.org/jira/browse/GUVNOR-286"><span
lang=EN-US>https://jira.jboss.org/jira/browse/GUVNOR-286</span></a><span
lang=EN-US>, but didn’t find anything on the web. We currently have the
same error with Maven and Drools 5.0.1, very strange:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Testcode<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US> public static void main(String[] args)
{<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> final DecisionTableConfiguration
dtableconfiguration = KnowledgeBuilderFactory.newDecisionTableConfiguration();<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>
dtableconfiguration.setInputType( DecisionTableInputType.XLS );<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US> final KnowledgeBuilder kbuilder
= KnowledgeBuilderFactory.newKnowledgeBuilder();<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> kbuilder.add(
ResourceFactory.newClassPathResource("Sample.xls", Test.class ),<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>
ResourceType.DTABLE,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>
dtableconfiguration );<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US> final KnowledgeBase kbase =
KnowledgeBaseFactory.newKnowledgeBase();<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> kbase.addKnowledgePackages(
kbuilder.getKnowledgePackages() );<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US> // typical decision tables are
used statelessly<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> StatefulKnowledgeSession
ksession = kbase.newStatefulKnowledgeSession(); <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> }<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Stacktrace:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>org.drools.template.parser.DecisionTableParseException:
An error occured opening the workbook. It is possible that the encoding of the
document did not match the encoding of the reader.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.decisiontable.parser.xls.ExcelParser.parseFile(ExcelParser.java:89)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.decisiontable.SpreadsheetCompiler.compile(SpreadsheetCompiler.java:90)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.decisiontable.SpreadsheetCompiler.compile(SpreadsheetCompiler.java:69)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.decisiontable.DecisionTableProviderImpl.compileStream(DecisionTableProviderImpl.java:29)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.decisiontable.DecisionTableProviderImpl.loadFromInputStream(DecisionTableProviderImpl.java:19)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.compiler.DecisionTableFactory.loadFromInputStream(DecisionTableFactory.java:16)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:508)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:31)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at Test.main(Test.java:21)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Caused by: jxl.read.biff.BiffException:
Unable to recognize OLE stream<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at jxl.read.biff.CompoundFile.<init>(CompoundFile.java:111)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
jxl.read.biff.File.<init>(File.java:113)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
jxl.Workbook.getWorkbook(Workbook.java:250)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
jxl.Workbook.getWorkbook(Workbook.java:235)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.decisiontable.parser.xls.ExcelParser.parseFile(ExcelParser.java:74)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> ... 8 more<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>The strange thing: When we tried it with
Eclipse (3.4.2) and created a Drools project, everything worked. When we
created a maven project and added exactly the same libraries, the exception was
caused.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>We tracked it down to the .project file:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><?xml version="1.0"
encoding="UTF-8"?><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><projectDescription><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <name>iks_drools</name><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <comment></comment><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <projects><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> </projects><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <buildSpec><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <buildCommand><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>
<name>org.eclipse.jdt.core.javabuilder</name><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <arguments><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> </arguments><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> </buildCommand><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <!-- buildCommand><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>
<name>org.maven.ide.eclipse.maven2Builder</name><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <arguments><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> </arguments><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> </buildCommand --><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <buildCommand><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>
<name>org.drools.eclipse.droolsbuilder</name><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <arguments><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> </arguments><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> </buildCommand><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> </buildSpec><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <natures><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>
<nature>org.eclipse.jdt.core.javanature</nature><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <!-- nature>org.maven.ide.eclipse.maven2Nature</nature
--><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> </span></natures><o:p></o:p></p>
<p class=MsoNormal></projectDescription><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US>With the comments it works, without the
comments and the maven2Builder and natures it causes the exception. We are
puzzled.</span><span lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Any ideas?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US>Hopefully it is OK to post that to the dev
lists, seems a pretty deep thing…<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><br>
Thanks a lot and Cheers<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Bernd<o:p></o:p></span></p>
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