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PODrools: Can't declare new type (with field) in .drl file
 

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  1. PODrools: Can't declare new type (with field) in .drl file
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    <p>I cannot add fields to new type declarations. Do I need an actual Java class for every type declaration in a .drl file? I thought those were generated by Drools?</p> <p>This works:</p> <pre><code>package tests declare Person end </code></pre> <p>Now add a field (type doesn't matter):</p> <pre><code>package tests declare Person age : int end </code></pre> <p>And it throws following error.</p> <pre><code>java.lang.NoSuchMethodError: java.lang.String.isEmpty()Z at org.drools.compiler.PackageBuilder.resolveType(PackageBuilder.java:1606) at org.drools.compiler.PackageBuilder.fillFieldTypes(PackageBuilder.java:1672) at org.drools.compiler.PackageBuilder.processTypeDeclarations(PackageBuilder.java:2008) at org.drools.compiler.PackageBuilder.mergePackage(PackageBuilder.java:1272) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:869) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:466) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:694) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:51) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:40) at RuleTest.setUp(RuleTest.java:35) at junit.framework.TestCase.runBare(TestCase.java:132) at junit.framework.TestResult$1.protect(TestResult.java:110) at junit.framework.TestResult.runProtected(TestResult.java:128) at junit.framework.TestResult.run(TestResult.java:113) at junit.framework.TestCase.run(TestCase.java:124) at junit.framework.TestSuite.runTest(TestSuite.java:232) at junit.framework.TestSuite.run(TestSuite.java:227) at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196) </code></pre> <p>It's thrown at the "Testrules.drl" line:</p> <pre><code>@Override public void setUp() throws Exception { KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add( ResourceFactory.newClassPathResource( "Testrules.drl" ), ResourceType.DRL ); ... } </code></pre> <p>Using Eclipse 3.4.2, Drools 5.5.0 Final</p>
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