2010/4/26 Felipe Piccolini <felipe.piccolini@gmail.com>

Using template you will see that the @{} is replaced "just as is" from the data (for example from a spreadsheet), so
if you have a value in the example will be replaced as text in the rule and you will have something like this:

if @{symbol} == "THE_SYMBOL"

==>

rule "A stand alone rule THE_SYMBOL"
dialect "mvel"
when

eval(THE_SYMBOL == "AAA")
then
System.out.println("this symbol is" + THE_SYMBOL)

end
----------

So as you can see, the variable is no more a variable in the generated rule, just text, so if you wanna use it as a string, you should add double-quote
(")

your rule template should be something like this:

rule "A stand alone rule @{symbol}"
dialect "mvel"
when

eval("@{symbol}" == "AAA")
then
System.out.println("this symbol is" + "@{symbol}")

end

2010/4/22 Stefan Marconi <stefan.marconi@gmail.com>

Hi,

just starting using drools and need to use templates but having error messages (described in comments in the code below).
I checked the meaning of the error messages but still can't figure it out.

I modified an simple rule according to the template section of the drools manual: btw I use the eclipse with the drools-core plugin.

Thanks for your help. Stefan

template header
symbol

package com.test.processor; # [ERR 102] Line 4:26 mismatched input ';' expecting 'identifier' in template header
template "test"

rule "A stand alone rule @{symbol}"
dialect "mvel"
when

eval(@{symbol} == "AAA")
then
System.out.println("this symbol is" + @{symbol})

end
end template # Multiple markers at this line
# - [ERR 103] Line 13:0 rule 'rule_key' failed predicate: {(validateIdentifierKey(DroolsSoftKeywords.RULE))}? in rule
# - [ERR 101] Line 13:4 no viable alternative at input 'template' in rule end

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--
-----------------------------
Felipe Piccolini
felipe.piccolini@gmail.com

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