2007/8/31, hypnosat7 <ablarbi@yahoo.fr>:

Hi,

   I have a variable declaration as bellow :

>list:Variable() from ruleApp.getVariable("variableName")

and this is the result :
Exception in thread "AWT-EventQueue-0" org.mvel.CompileException: cannot
invoke method
        at
org.mvel.optimizers.impl.refl.MethodAccessor.getValue (MethodAccessor.java:54)
        at
org.mvel.optimizers.impl.refl.VariableAccessor.getValue(VariableAccessor.java:39)
        at
org.mvel.ast.VariableDeepPropertyNode.getReducedValueAccelerated(VariableDeepPropertyNode.java :26)
        at
org.mvel.ast.PropertyASTNode.getReducedValueAccelerated(PropertyASTNode.java:19)
        at org.mvel.MVELRuntime.execute(MVELRuntime.java:88)
        at org.mvel.CompiledExpression.getValue(CompiledExpression.java :99)
        at org.mvel.MVEL.executeExpression(MVEL.java:236)
        at
org.drools.base.dataproviders.MVELDataProvider.getResults(MVELDataProvider.java:45)
        at org.drools.reteoo.FromNode.assertTuple(FromNode.java :61)
        at
org.drools.reteoo.CompositeTupleSinkAdapter.createAndPropagateAssertTuple(CompositeTupleSinkAdapter.java:73)
        at
org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java :131)
        at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
        at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:160)
        at org.drools.reteoo.Rete.assertObject (Rete.java:176)
        at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:196)
        at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:164)
        at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1260)
        at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:864)
        at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:826)
        at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:627)
        at
mcmipih.rules.rules.integration.drools.ExecutionContext.executeRuleFlow (ExecutionContext.java:54)
        at
mcmipih.rules.demo.service.DemoRuleService.validerRumList(DemoRuleService.java:50)
        at
mcmipih.rules.demo.service.DemoRuleService$$FastClassByCGLIB$$beeddc5a.invoke (<generated>)
        at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
        at
org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:693)
        at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:139)
        at
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java :107)
        at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:161)
        at
org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept (Cglib2AopProxy.java:628)
        at
mcmipih.rules.demo.service.DemoRuleService$$EnhancerByCGLIB$$961244c9.validerRumList(<generated>)
        at
mcmipih.rules.demo.controller.ValidationAppController$ActionValiderSelectionLst.actionPerformed (ValidationAppController.java:185)
        at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
        at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.fireActionPerformed (Unknown Source)
        at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
        at java.awt.Component.processMouseEvent (Unknown Source)
        at javax.swing.JComponent.processMouseEvent(Unknown Source)
        at java.awt.Component.processEvent(Unknown Source)
        at java.awt.Container.processEvent(Unknown Source)
        at java.awt.Component.dispatchEventImpl(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.LightweightDispatcher.retargetMouseEvent (Unknown Source)
        at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
        at java.awt.Container.dispatchEventImpl (Unknown Source)
        at java.awt.Window.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.lang.NullPointerException
        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.mvel.optimizers.impl.refl.MethodAccessor.getValue(MethodAccessor.java:46)
        ... 54 more
--
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