Hi,
I have a simple rule :
function String isTrue() {
return "true";
}
rule "new rule"
dialect "mvel"
when
eval(true)
then
System.out.println("passe"+isTrue());
end
But it seems impossible to call function's :
org.mvel.PropertyAccessException: failed to access property:
<<System.out.println("passe"+isTrue())>> in: null
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:137)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:96)
at org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:194)
at org.mvel.MVELRuntime.execute(MVELRuntime.java:87)
at org.mvel.MVEL.executeDebugger(MVEL.java:327)
at
org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:43)
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:545)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:509)
at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:430)
at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:392)
at mcmipih.rules.demo.service.TestDraft.main(TestDraft.java:37)
Caused by: org.mvel.PropertyAccessException: null pointer exception in
property: isTrue()
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:143)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:96)
at org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:194)
at
org.mvel.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:20)
at org.mvel.MVELRuntime.execute(MVELRuntime.java:87)
at org.mvel.CompiledExpression.getValue(CompiledExpression.java:98)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:421)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:109)
... 10 more
Caused by: java.lang.NullPointerException
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:429)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:109)
... 17 more
org.drools.spi.ConsequenceException: org.mvel.PropertyAccessException:
failed to access property: <<System.out.println("passe"+isTrue())>> in: null
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:549)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:509)
at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:430)
at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:392)
at mcmipih.rules.demo.service.TestDraft.main(TestDraft.java:37)
Caused by: org.mvel.PropertyAccessException: failed to access property:
<<System.out.println("passe"+isTrue())>> in: null
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:137)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:96)
at org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:194)
at org.mvel.MVELRuntime.execute(MVELRuntime.java:87)
at org.mvel.MVEL.executeDebugger(MVEL.java:327)
at
org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:43)
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:545)
... 4 more
Caused by: org.mvel.PropertyAccessException: null pointer exception in
property: isTrue()
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:143)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:96)
at org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:194)
at
org.mvel.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:20)
at org.mvel.MVELRuntime.execute(MVELRuntime.java:87)
at org.mvel.CompiledExpression.getValue(CompiledExpression.java:98)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:421)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:109)
... 10 more
Caused by: java.lang.NullPointerException
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:429)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:109)
... 17 more
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