It could be an error in the DSL file. Check for errors after *each*
builder.add(...).
-W
2011/3/4 Saleem Lakhani :
> Following is my code:
>
>
>
> KnowledgeBuilderConfiguration kbc =
> KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration();
>
> kbc.setProperty("drools.dialect.java.compiler", "JANINO");
>
> KnowledgeBuilder builder = null;
>
> builder = KnowledgeBuilderFactory.newKnowledgeBuilder(kbc);
>
>
>
> Reader drlSource = new
> InputStreamReader(RVEngine.class.getResourceAsStream(ruleset.getDrlSource()));
> //ruleset.getDrlSource() = com/cit/myDrl.dslr
>
> Reader dslSource = new
> InputStreamReader(RVEngine.class.getResourceAsStream(ruleset.getDslSource()));
>
>
>
> builder.add(ResourceFactory.newReaderResource(dslSource), ResourceType.DSL);
>
> builder.add(ResourceFactory.newReaderResource(drlSource),
> ResourceType.DSLR);
>
>
>
> KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
>
> kbase.addKnowledgePackages(builder.getKnowledgePackages());
>
>
>
>
>
> no matter what I type in my dslr (drl) file I get the following exception on
> the highlighted line; ANY IDEA
>
> I have 1 rule or No rule it still throws the same exception. Does it have to
> do with any jar files?
>
>
>
> Caused by: java.lang.NullPointerException
>
> at
> org.drools.compiler.PackageBuilder.validateUniqueRuleNames(PackageBuilder.java:830)
>
> at
> org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:555)
>
> at
> org.drools.compiler.PackageBuilder.addPackageFromDslr(PackageBuilder.java:355)
>
> at
> org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:461)
>
> at
> org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)
>
>
>
>
>
> saleem
>
>
>
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>
>
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