Accumulate with from chaining fails with Rule Compilation Error when reverse is used ------------------------------------------------------------------------------------ Key: JBRULES-2403 URL: https://jira.jboss.org/jira/browse/JBRULES-2403 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-compiler Affects Versions: 5.0.1.FINAL Environment: Eclipse Galileo, JDK 1.6 (64-bit), Drools 5.0.1, Vista 64-bit Reporter: hoogenbj Assignee: Mark Proctor Hi, While trying to upgrade from Drools 4.0.7 to Drools 5.0.1 I noticed a problem with the rules that use accumulate-with-from-chaining. If there is a reverse action, then I get a Rule Compilation error: java.lang.RuntimeException: Rule Compilation error : [Rule name='Accumulate with From Chaining'] org/drools/Rule_Accumulate_with_From_Chaining_0.java (11:62) : File org/drools/Rule_Accumulate_with_From_Chaining_0.java, Line 11, Column 62: Operator "[" expected at org.drools.TestKnowledgeBuilder.test(TestKnowledgeBuilder.java:34) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:73) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:46) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:180) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:41) at org.junit.runners.ParentRunner$1.evaluate(ParentRunner.java:173) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31) at org.junit.runners.ParentRunner.run(ParentRunner.java:220) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) It works fine with Drools 4.0.7. If the "reverse" is removed, then the rule compiles fine. So I guess that is the workaround - but only if you don't need the reverse. I have an eclipse project that demonstrates the problem but there does not seem to be a way to upload it. Here's what the rule looks like: package org.drools; import java.util.List; import java.util.ArrayList; global java.util.List results; rule "Accumulate with From Chaining" salience 80 when $cheesery : Cheesery() $person : Person( $likes : likes ) $list : List( size > 2 ) from accumulate( $cheese : Cheese( type == $likes ) from $cheesery.getCheeses(), init( List l = new ArrayList(); ), action( l.add( $cheese ); ), reverse( l.remove( $cheese ); ), result( l ) ) then results.add( $list ); end I modified test_AccumulateWithFromChaining.drl in drools-5.0\src\drools-compiler\src\test\resources\org\drools\integrationtests for my test. Here is my test code: Properties props = new Properties(); props.setProperty("drools.dialect.java.compiler", "JANINO"); KnowledgeBuilderConfiguration config = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(props, this.getClass().getClassLoader()); KnowledgeBuilder knowledgeBuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(config); knowledgeBuilder.add(ResourceFactory.newInputStreamResource(getClass().getResourceAsStream( "test_AccumulateWithFromChaining.drl" )), ResourceType.DRL); if (knowledgeBuilder.hasErrors()) { throw new RuntimeException(knowledgeBuilder.getErrors().toString()); } which results in a RuntimeException. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira