2007/8/29, hypnosat7 <ablarbi@yahoo.fr>:

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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