<br> What we do support is:<br><br>list:Variable() from SOME_MVEL_CODE<br><br> And MVEL supports an extended java syntax, so basically I think you can do anything, as long as the code returns something not null.<br><br>
[]s<br> Edson<br><br><br><div><span class="gmail_quote">2007/8/31, pentarious <<a href="mailto:cristiano.giuffrida@gmail.com">cristiano.giuffrida@gmail.com</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>Hi,<br>I believe the following syntax is not supported in Drools:<br>list:Variable() from SOME_JAVA_CODE<br>You should use something like: "from $list" or "from collect" or "from<br>accumulate", and embed any Java code in an eval statement. Edson, am I
<br>missing something?<br><br>Regards,<br><br>CG<br><br><br><br>hypnosat7 wrote:<br>><br>> Hi,<br>><br>> I have a variable declaration as bellow :<br>><br>>>list:Variable() from ruleApp.getVariable
("variableName")<br>><br>> and this is the result :<br>> Exception in thread "AWT-EventQueue-0" org.mvel.CompileException: cannot<br>> invoke method<br>> at<br>> org.mvel.optimizers.impl.refl.MethodAccessor.getValue
(MethodAccessor.java:54)<br>> at<br>> org.mvel.optimizers.impl.refl.VariableAccessor.getValue(VariableAccessor.java:39)<br>> at<br>> org.mvel.ast.VariableDeepPropertyNode.getReducedValueAccelerated
(VariableDeepPropertyNode.java:26)<br>> at<br>> org.mvel.ast.PropertyASTNode.getReducedValueAccelerated(PropertyASTNode.java:19)<br>> at org.mvel.MVELRuntime.execute(MVELRuntime.java:88)<br>> at
org.mvel.CompiledExpression.getValue(CompiledExpression.java:99)<br>> at org.mvel.MVEL.executeExpression(MVEL.java:236)<br>> at<br>> org.drools.base.dataproviders.MVELDataProvider.getResults(MVELDataProvider.java
:45)<br>> at org.drools.reteoo.FromNode.assertTuple(FromNode.java:61)<br>> at<br>> org.drools.reteoo.CompositeTupleSinkAdapter.createAndPropagateAssertTuple(CompositeTupleSinkAdapter.java:73)<br>> at
<br>> org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:131)<br>> at<br>> org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)<br>> at
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:160)<br>> at org.drools.reteoo.Rete.assertObject(Rete.java:176)<br>> at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java
:196)<br>> at<br>> org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:164)<br>> at<br>> org.drools.common.AbstractWorkingMemory.executeQueuedActions
(AbstractWorkingMemory.java:1260)<br>> at<br>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:864)<br>> at<br>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java
:826)<br>> at<br>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:627)<br>> at<br>> mcmipih.rules.rules.integration.drools.ExecutionContext.executeRuleFlow(ExecutionContext.java
:54)<br>> at<br>> mcmipih.rules.demo.service.DemoRuleService.validerRumList(DemoRuleService.java:50)<br>> at<br>> mcmipih.rules.demo.service.DemoRuleService$$FastClassByCGLIB$$beeddc5a.invoke(<generated>)
<br>> at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)<br>> at<br>> org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:693)<br>> at
<br>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:139)<br>> at<br>> org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java
:107)<br>> at<br>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:161)<br>> at<br>> org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept
(Cglib2AopProxy.java:628)<br>> at<br>> mcmipih.rules.demo.service.DemoRuleService$$EnhancerByCGLIB$$961244c9.validerRumList(<generated>)<br>> at<br>> mcmipih.rules.demo.controller.ValidationAppController$ActionValiderSelectionLst.actionPerformed
(ValidationAppController.java:185)<br>> at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)<br>> at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)<br>> at javax.swing.DefaultButtonModel.fireActionPerformed
(Unknown Source)<br>> at javax.swing.DefaultButtonModel.setPressed(Unknown Source)<br>> at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown<br>> Source)<br>> at java.awt.Component.processMouseEvent
(Unknown Source)<br>> at javax.swing.JComponent.processMouseEvent(Unknown Source)<br>> at java.awt.Component.processEvent(Unknown Source)<br>> at java.awt.Container.processEvent(Unknown Source)<br>
> at java.awt.Component.dispatchEventImpl(Unknown Source)<br>> at java.awt.Container.dispatchEventImpl(Unknown Source)<br>> at java.awt.Component.dispatchEvent(Unknown Source)<br>> at java.awt.LightweightDispatcher.retargetMouseEvent
(Unknown Source)<br>> at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)<br>> at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)<br>> at java.awt.Container.dispatchEventImpl
(Unknown Source)<br>> at java.awt.Window.dispatchEventImpl(Unknown Source)<br>> at java.awt.Component.dispatchEvent(Unknown Source)<br>> at java.awt.EventQueue.dispatchEvent(Unknown Source)<br>> at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)<br>> at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)<br>> at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
<br>> at java.awt.EventDispatchThread.pumpEvents(Unknown Source)<br>> at java.awt.EventDispatchThread.run(Unknown Source)<br>> Caused by: java.lang.NullPointerException<br>> at sun.reflect.NativeMethodAccessorImpl.invoke0
(Native Method)<br>> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)<br>> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)<br>> at java.lang.reflect.Method.invoke
(Unknown Source)<br>> at<br>> org.mvel.optimizers.impl.refl.MethodAccessor.getValue(MethodAccessor.java:46)<br>> ... 54 more<br>><br><br>--<br>View this message in context: <a href="http://www.nabble.com/mvel-bug----tf4360199.html#a12429712">
http://www.nabble.com/mvel-bug----tf4360199.html#a12429712</a><br>Sent from the drools - user mailing list archive at <a href="http://Nabble.com">Nabble.com</a>.<br><br>_______________________________________________<br>rules-users mailing list
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<br><br clear="all"><br>-- <br> Edson Tirelli<br> Software Engineer - JBoss Rules Core Developer<br> Office: +55 11 3529-6000<br> Mobile: +55 11 9287-5646<br> JBoss, a division of Red Hat @ <a href="http://www.jboss.com">
www.jboss.com</a>