[jboss-jira] [JBoss JIRA] Created: (JBRULES-1311) NPE when compiling rule consequences

[Edson Tirelli (JIRA)]

NPE when compiling rule consequences
------------------------------------

                 Key: JBRULES-1311
                 URL: http://jira.jboss.com/jira/browse/JBRULES-1311
             Project: JBoss Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Drl Parser/Builder, Rule Assemply/SPI
    Affects Versions: 4.0.3, 4.0.2, 4.0.1,  4.0.0.GA
            Reporter: Edson Tirelli
         Assigned To: Edson Tirelli
             Fix For: 4.1.0


I have the following code: (note String[] ruleFiles contains only one string)

 

public class Engine {

    private static RuleBase ruleBase;

 

    public void start(String[] ruleFiles) throws Exception {

        PackageBuilderConfiguration cfg = new PackageBuilderConfiguration();

        JavaDialectConfiguration javaConf = (JavaDialectConfiguration) cfg.getDialectConfiguration("java");

        javaConf.setCompiler(JavaDialectConfiguration.ECLIPSE);

        PackageBuilder builder = new PackageBuilder(cfg);

        for (String file : ruleFiles) {

            builder.addPackageFromDrl(new InputStreamReader(ClassLoader.getSystemResourceAsStream(file)));

        }

        Package pkg = builder.getPackage();

 

        PackageBuilderErrors errors = builder.getErrors();

        if (errors.getErrors().length != 0) {

            // do something

        }

 

        RuleBaseConfiguration conf = new RuleBaseConfiguration();

        conf.setAssertBehaviour(RuleBaseConfiguration.AssertBehaviour.EQUALITY);

 

        ruleBase = RuleBaseFactory.newRuleBase();

        ruleBase.addPackage(pkg);

        ruleBase.newStatefulSession(false);

 

    }

}

 

At the builder.addPackageFromDrl(new InputStreamReader(ClassLoader.getSystemResourceAsStream(file))); line I'm getting the following exception:

java.lang.NullPointerException

            at org.drools.rule.builder.dialect.java.JavaConsequenceBuilder.build(JavaConsequenceBuilder.java:54)

            at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:67)

            at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:446)

            at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:304)

            at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:167)

            at myPackage.rivoli.service.rules.Engine.start(Engine.java:33)

            at myPackage.rivoli.rules.LeaderKingAndHeirTest.setUp(LeaderKingAndHeirTest.java:26)

            at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:40)

            at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

            at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

            at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

            at com.intellij.rt.execution.application.AppMain.main(AppMain.java:90)

 

I am using Drools 4.0.3

I have the following jars in my class path:

antlr-runtime-3.0.jar

core-3.2.3.v_686_R32x.jar

drools-compiler-4.0.3.jar

drools-core-4.0.3.jar

mvel14-1.2.10.jar

 

Any ideas would be helpful. Thanks.

 
rule "leaders in same location"

salience 10

when

    $result : RuleResult(rulesPassed not contains "leaders in same location")

    $loc : LocationImpl()

    $leaderName : String()

    $leader1 : LeaderImpl(name == $leaderName, location == $loc)

    $leader2 : LeaderImpl(name != $leaderName, this != $leader1, location == $loc)

then

    $result.addPassedRule(leaders in same location);

    update($result);

end

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