Hi I need to evaluate an expression rule from my smart service. I cou

sivananthag over 9 years ago

Hi

I need to evaluate an expression rule from my smart service. I could able to get the expression rule id through ContentService.searchByRoot(rulesRootId, ruleName, filter)
and I got an object of type FreeformRule and i can get the expression rule id from that object.
I need to evaluate this rule and get the results which return a custom data type.

I tried to use ExpressionService.evaluateExpression, but it is deprecated method. In processDesignService.evaluateExpression takes java.lang.String Expression as parameter, not expression rule id.
Please suggest me with suitable api that takes expression rule id as parameter and return results
Thanks
Jhothi

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0 sivananthag over 9 years ago

Hi

Thanks for all suggestions.

Will it not be possible to evaluate expression rule that returns custom data type from Smart service / Filter code?

I need to evaluate an expression rule inside Filter class, so i can not pass it as process parameter. So I created the below expression rule named EI_TESTRULE with rule definition:
='type!{bac.com/entitlement/AppianGroup}AppianGroupConfig'(
          appianApplicationName: "Test",
          appianGroupName: "Test",
          appianParentGroupName: "Test",
          appianCustomGroupType: "Test",
          appianGroupSecurityType: "Test",
          appianGroupMemberPolicyType: "Test",
          appianGroupPrivacyPolicyType: "Test"
)
and it worked when i tested it from Appian designer portal.

I have imported this package to my filter (it got imported as com.bac.entitlement.AppianGroup.AppianGroupConfig.java class).
and I tried to get this expression rule evaluated in my filter class using the below code:

ProcessDesignService pds = getProcessDesignService();
TypedValue tv1 = pds.evaluateExpression("=EI_TESTRULE()");

When i execute the filter code, i got the below error:
com.appiancorp.process.expression.ExpressionRuntimeException$AppianExceptionProvider: Expression evaluation error : Rule ei_appiangroupconfig_constant has invalid form, so cannot be evaluated (APNX-1-4198-000)

Please help
Thanks
Jhothi
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0 sivananthag over 9 years ago

Hi

Thanks for all suggestions.

Will it not be possible to evaluate expression rule that returns custom data type from Smart service / Filter code?

I need to evaluate an expression rule inside Filter class, so i can not pass it as process parameter. So I created the below expression rule named EI_TESTRULE with rule definition:
='type!{bac.com/entitlement/AppianGroup}AppianGroupConfig'(
          appianApplicationName: "Test",
          appianGroupName: "Test",
          appianParentGroupName: "Test",
          appianCustomGroupType: "Test",
          appianGroupSecurityType: "Test",
          appianGroupMemberPolicyType: "Test",
          appianGroupPrivacyPolicyType: "Test"
)
and it worked when i tested it from Appian designer portal.

I have imported this package to my filter (it got imported as com.bac.entitlement.AppianGroup.AppianGroupConfig.java class).
and I tried to get this expression rule evaluated in my filter class using the below code:

ProcessDesignService pds = getProcessDesignService();
TypedValue tv1 = pds.evaluateExpression("=EI_TESTRULE()");

When i execute the filter code, i got the below error:
com.appiancorp.process.expression.ExpressionRuntimeException$AppianExceptionProvider: Expression evaluation error : Rule ei_appiangroupconfig_constant has invalid form, so cannot be evaluated (APNX-1-4198-000)

Please help
Thanks
Jhothi
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