I try and change the dialect but it doesn't work
rule "Your First Rule"
dialect "mvel"
when
then
drools.rule.dialect="java"
System.out.println(drools.getRule().getDialect());
System.out.println("ok"+func());
end
the package still invalid :
* (1,6) unable to resolve method using strict-mode:
java.lang.Object.func(...)
* (1,6) unable to resolve method using strict-mode:
java.lang.Object.func(...)
hypnosat7 wrote:
>
> 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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