[jboss-jira] [JBoss JIRA] (DROOLS-180) NPE when trying to add the same resource twice

[Mario Fusco (JIRA)]

Mario Fusco created DROOLS-180:
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             Summary: NPE when trying to add the same resource twice
                 Key: DROOLS-180
                 URL: https://issues.jboss.org/browse/DROOLS-180
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
            Reporter: Mario Fusco
            Assignee: Mario Fusco


Trying to add the same resource twice to the KnowledgeBuilder like in

{code} 
        String str =
                "rule R when\n" +
                "  $s : String()\n" +
                "then\n" +
                "end\n";

        KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
        kbuilder.add( ResourceFactory.newByteArrayResource( str.getBytes() ), ResourceType.DRL );
        kbuilder.add( ResourceFactory.newByteArrayResource( str.getBytes() ), ResourceType.DRL );
{code}

generates the following NullPointerException:

{code}
java.lang.NullPointerException
	at org.drools.compiler.compiler.PackageBuilder.validateUniqueRuleNames(PackageBuilder.java:1351)
	at org.drools.compiler.compiler.PackageBuilder.initPackageRegistry(PackageBuilder.java:947)
	at org.drools.compiler.compiler.PackageBuilder.addPackage(PackageBuilder.java:899)
	at org.drools.compiler.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:484)
	at org.drools.compiler.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:688)
	at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:51)
	at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:40)
{code}

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