Hi, I solved the same problem with a local variable defined in the function
tag...
To solve your proble try somthing like this...
<java:functions>
public static double sqrtResult;
</java:functions>
<rule name="yourRule" description="calculate sqrt">
< parameter identifier="num" >
< class > Integer < / class >
< / parameter >
< java:condition >
(sqrtResult=Math.sqrt(num.intValue())) > 1000
< / java:condition >
< java:consequence >
System.out.println( sqrtResult );
< / java:consequence >
</rule>
Cheers
Rik
----- Original Message -----
From: "sol myr" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, January 31, 2006 11:04 AM
Subject: [drools-user] Drools: Sharing a value between the rule's
"condition" and "consequence" ?
Hi,
I'm new to Drools. Could anyone please help with the following:
Can you share data between a rule's "condition" and "consequence" ?
For example:
- My "condition" calculates some square root (Math.sqrt)
- The "consequence" needs to print out the same square root
It's not efficient to call Math.sqrt twice... :
< parameter identifier="num" >
< class > Integer < / class >
< / parameter >
< java:condition >
Math.sqrt(num.intValue()) > 1000
< / java:condition >
< java:consequence >
System.out.println( Math.sqrt(num.intValue())
< / java:consequence >
Is there a way to store the result of "Math.sqrt" in some temporary
variable ( so as to avoid the duplicate calculation ) ?
Please note I know about "application data", but i'd rather not use it,
because my sqrt is just a temporary value...
Thanks :)
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