Re: [rules-users] MVEL error (was: 3.1 M Help Needed)

MVEL is currently only used for 'from', it should work fine for that purpose. Mark Edson Tirelli wrote: > > Mark, > > What is the status on MVEL stuff used in core? > > []s > Edson > > 2007/4/6, vista2007 <my_vista2007(a)yahoo.com > <mailto:my_vista2007@yahoo.com> >: > > > I implement the following logic using 3.1M edition, > > package com.software.warehouse.rules.impl ; > > #list any import classes here. > import com.software.warehouse.model.Item; > import com.software.warehouse.model.ItemCollect; > > > #declare any global variables here > > global com.software.warehouse.model.ItemCollect itemCollect; > > rule "Rule 1" > > salience 20 > when > # itemCollect.getItemList() method returns a List > of objects > > m : Item(status == Item.ACTIVE ) from > itemCollect.getItemList() > > then > m.setStatus(Item.INACTIVE); > System.out.println(m.getStatus()); > end > > > It gave me the followin error. > > ObjectAsserted: > handle=[fid:1:1:com.software.warehouse.model.ItemCollect@12a3722]; > object=com.software.warehouse.model.ItemCollect@12a3722] > org.mvel.PropertyAccessException: null pointer exception in property: > itemCollect.getItemList().list() > at > > org.mvel.optimizers.impl.refl.ReflectiveOptimizer.compileGetChain(ReflectiveOptimizer.java:137) > at > org.mvel.optimizers.impl.refl.ReflectiveOptimizer.optimize > (ReflectiveOptimizer.java:92) > at org.mvel.Token.getReducedValueAccelerated(Token.java:302) > at > org.mvel.ExecutableAccessor.getValue(ExecutableAccessor.java:46) > at org.mvel.MVEL.executeExpression (MVEL.java:173) > at > > org.drools.base.dataproviders.MVELDataProvider.getResults(MVELDataProvider.java:43) > at org.drools.reteoo.FromNode.assertTuple(FromNode.java:61) > at > > org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple > (SingleTupleSinkAdapter.java:55) > at > > org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:147) > at > > org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java > :20) > at > > org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:163) > at org.drools.reteoo.Rete.assertObject(Rete.java:121) > at > org.drools.reteoo.ReteooRuleBase.assertObject( > ReteooRuleBase.java:196) > at > > org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.propagate(ReteooWorkingMemory.java:157) > at > org.drools.common.AbstractWorkingMemory.propagateQueuedActions > (AbstractWorkingMemory.java:998) > at > > org.drools.common.AbstractWorkingMemory.assertObject(AbstractWorkingMemory.java:733) > > > Can anyone please help me to slove this problum. Thank You. > -- > View this message in context: > http://www.nabble.com/3.1-M-Help-Needed-tf3535402.html#a9868300 > Sent from the drools - user mailing list archive at Nabble.com > <http://Nabble.com>;. > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> > https://lists.jboss.org/mailman/listinfo/rules-users > > > > > -- > Edson Tirelli > Software Engineer - JBoss Rules Core Developer > Office: +55 11 3124-6000 > Mobile: +55 11 9218-4151 > JBoss, a division of Red Hat @ www.jboss.com <http://www.jboss.com> > ------------------------------------------------------------------------ > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users