[rules-users] Data comparing in CONDITION column decision table

[Sumeet Karawal]

when I do this I am getting the below error:

Exception in thread "main" java.lang.RuntimeException: Unable to Analyse
Expression $a.getType():
[Error: unable to resolve method using strict-mode:
com.example.model.Customer.$a()]
[Near : {... $a.getType() ....}]
             ^
[Line: 1, Column: 1] : [Rule name='Discount_10']

Unable to Analyse Expression $a.getType():
[Error: unable to resolve method using strict-mode:
com.example.model.Customer.$a()]
[Near : {... $a.getType() ....}]
             ^
[Line: 1, Column: 1] : [Rule name='Discount_11']

Unable to Analyse Expression $a.getType():
[Error: unable to resolve method using strict-mode:
com.example.model.Customer.$a()]
[Near : {... $a.getType() ....}]
             ^
[Line: 1, Column: 1] : [Rule name='Discount_12']



|-------------------------------------------- 
|RuleTable                                    
|Discount                                     
|-------------------------------------------- 
|CONDITION      |CONDITION                   |
|---------------+----------------------------|
|$a : Account   |$c : Customer               |
|---------------+----------------------------|
|               |type == $param               
|---------------+---------------------------- 
|    Account    |            Type            |
|---------------+----------------------------|
|               |        $a.getType()        |
|---------------+----------------------------|
|               |                            |
|---------------+----------------------------|
|               |                            |
|---------------+----------------------------|
|               |                            |
|---------------+----------------------------|
|               |                            |
|---------------+----------------------------|
|               |                            |
|---------------+----------------------------|





Howerver, when I include the following in the decision table:
|-------------------------------------------- 
|RuleTable                                    
|Discount                                     
|-------------------------------------------- 
|CONDITION      |CONDITION                   |
|---------------+----------------------------|
|$a : Account   |$c : Customer               |
|---------------+----------------------------|
|type           |type == $param               
|---------------+---------------------------- 
|    Account    |            Type            |
|---------------+----------------------------|
|    savings    |        $a.getType()        |
|---------------+----------------------------|
|    current    |                            |
|---------------+----------------------------|
|    savings    |                            |
|---------------+----------------------------|
|    current    |                            |
|---------------+----------------------------|
|    savings    |                            |
|---------------+----------------------------|
|    current    |                            |
|---------------+----------------------------|






I am getting correct result. But here I don't want to check for the type
entered for Account class.

The generated drl is like this:

rule "Discount_10"
	when
		$c : Customer(type == $a.getType(), accno == 1001)
	then
		$c.setDiscount(1);
end



How to make changes to the decision table entries to get a drl of this
kind:


rule "Discount_10"
	when
		$a : Account()
		$c : Customer(type == $a.getType(), accno == 1001)
	then
		$c.setDiscount(1);
end


Thanks,
Sumeet
Mailto: sumeet.karawal at tcs.com


                                                                                                                                  
  From:       Wolfgang Laun <wolfgang.laun at gmail.com>                                                                             
                                                                                                                                  
  To:         Rules Users List <rules-users at lists.jboss.org>                                                                      
                                                                                                                                  
  Date:       03/15/2012 02:47 PM                                                                                                 
                                                                                                                                  
  Subject:    Re: [rules-users] Data comparing in CONDITION column decision table                                                 
                                                                                                                                  
  Sent by:    rules-users-bounces at lists.jboss.org                                                                                 
                                                                                                                                  





Line breaks were lost in transit, but I think that you should remove
the quotes from

   type == "$param"

if you insert an expression $a.getType().

-W


On 15/03/2012, Sumeet Karawal <sumeet.karawal at tcs.com> wrote:
>
> Hi,
>
> Can we use a data value of another object in the condition column of a
> Spreadsheet.
>
> For example: I have two data types(POJOs) one com.bank.Customer and other
> com.bank.Account
>
> in the rules I want to check whether the value entered for a particular
> field in Customer class is equal to the value entered for the
corresponding
> field in the Account class. eg Customer.accType = Account.accType()
>
>
> How can we achieve this using Decision table (CONDITION Column). I have
> tried this:
>
>             --------------------------------------------
>            |RuleTable
>            |Discount
>             --------------------------------------------
>            |CONDITION      |CONDITION                   |
>             ---------------+----------------------------|
>            |$a : Account   |$c : Customer               |
>             ---------------+----------------------------|
>            |               |type == "$param"
>  ----------+---------------+----------------------------
> | Discount |    Account    |            Type            |
> |  Rules   |               |                            |
> |----------+---------------+----------------------------|
> |    1     |               |        $a.getType()        |
> |----------+---------------+----------------------------|
> |    2     |               |        $a.getType()        |
> |----------+---------------+----------------------------|
> |    3     |               |        $a.getType()        |
> |----------+---------------+----------------------------|
> |    4     |               |        $a.getType()        |
> |----------+---------------+----------------------------|
> |    5     |               |        $a.getType()        |
> |----------+---------------+----------------------------|
> |    6     |               |        $a.getType()        |
> |----------+---------------+----------------------------|
>
>
>
>
> But it won't work. It would be great if somebody could help me on this.
>
> Thanks & Regards,
> Sumeet Karawal
> Mailto: sumeet.karawal at tcs.com
>
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