change your dialect to mvel. 2009/4/28 Zeke <xanadu860...@gmail.com>
> Anyone can help me? I want to use an element of an Array in my rule > condition. > > Thank you very much! > > - Zeke > > 2009/4/28 Zeke <xanadu860...@gmail.com> > > Hi, >> I am using Drools 4.0.7 GA. I want to use Array type in my rule >> condition. My drl is like below: >> >>> package org.drools.examples.test; >>> >>> import org.drools.examples.HelloWorldExample.Message; >>> >>> rule "check.array" >>> dialect "java" >>> when >>> m:Message( arr[0] == "1" ) >>> then >>> System.out.println( "===check array ok===" ); >>> end >> >> >> arr is an int type array. When I run the test case, I meet below >> exception: >> >>> Exception in thread "main" org.drools.RuntimeDroolsException: Exception >>> executing predicate eval( arr[0] == "1" ) >>> at >>> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:216) >>> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) >>> at >>> org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:22) >>> at >>> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:162) >>> at org.drools.reteoo.Rete.assertObject(Rete.java:175) >>> at >>> org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192) >>> at >>> org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71) >>> at >>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:911) >>> at >>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:883) >>> at >>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:684) >>> at >>> org.drools.examples.HelloWorldExample.main(HelloWorldExample.java:69) >>> Caused by: org.mvel.CompileException: illegal use of []: unknown type: [I >>> at >>> org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getCollectionProperty(ReflectiveAccessorOptimizer.java:482) >>> at >>> org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:274) >>> at >>> org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:110) >>> at org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:186) >>> at >>> org.mvel.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:21) >>> at org.mvel.MVELRuntime.execute(MVELRuntime.java:90) >>> at org.mvel.CompiledExpression.getValue(CompiledExpression.java:111) >>> at org.mvel.MVEL.executeExpression(MVEL.java:234) >>> at >>> org.drools.base.mvel.MVELPredicateExpression.evaluate(MVELPredicateExpression.java:45) >>> at >>> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:209) >>> ... 10 more >>> >> >> Can anyone kindly tell me how to use Array type in Drools? Thanks in >> advance! >> >> - Zeke >> > > > _______________________________________________ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > >
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