[rules-users] Drools in non-eclipse environment

[Abhay B. Chaware]

Has anyone tried using drools in non-eclipse env ? meaning that org.eclipse.jdt.core_3.5.1.v_972_R35x.jar is not in the classpath ? 

Documentation says this :

(http://docs.huihoo.com/drools/4.0.7/ch02s05.html)

if you do not have Eclipse JDT Core in your classpath you must override the compiler setting before you instantiate this PackageBuilder, you can either do that with a packagebuilder properties file the ChainedProperties class will find, or you can do it programmatically as shown below; note this time I use properties to inject the value for startup.

They also provide an example, but I am not able to figure out exactly how to use this example/info.

Here is my code : 

		KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
		kbuilder.add(ResourceFactory.newInputStreamResource(is), ResourceType.DRL);

where "is" is input stream containing the rule file ( .drl)

How do I override the compiler setting ? 

I am getting a null pointer exception ( see below ) and I suspect that overriding the packagebuilderconfiguration will fix it ?

W/System.err(25511): java.lang.NullPointerException
W/System.err(25511):    at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:47)
W/System.err(25511):    at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1161)
W/System.err(25511):    at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:637)
W/System.err(25511):    at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:267)
W/System.err(25511):    at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:459)
W/System.err(25511):    at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)
W/System.err(25511):    at com.ts.DBconnector.readKnowledgeBase(DBconnector.java:146)