Re: MVEL error (was: 3.1 M Help Needed)

Can you try out trunk and see if you still get the bug? As its using a much newer version of MVEL.

Mark
vista2007 wrote:

hi,
What is the possible reason to cause this error ? 

regards
Gaminda



Mark Proctor wrote:
  

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@xxxxxxxxx 
<mailto:my_vista2007@xxxxxxxxx> >:


    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>.

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-- 
  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>
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