You can't use a method call as the left hand side operand in a constraint; thus<br> age.size() == 0<br>is not correct.<br><br>Do you really mean<br> age == "null"<br><br>Probably <br> ApplicationData( age == null || age == "" )<br>
is the right thing to do, provided that ApplicationData.age is a String.<br><br>-W<br><br><div class="gmail_quote">On 25 March 2011 17:32, Benson Fung <span dir="ltr"><<a href="mailto:benson.redhat@gmail.com">benson.redhat@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi,<br>
<br>
I got the following rule problem.<br>
<br>
The rule is like :<br>
<br>
1. | rule "Rule1"<br>
2. | dialect "mvel"<br>
3. | when<br>
4. | ad : ApplicationData( age == "null" , age.size() == 0)<br>
5. | then<br>
6. | ad.setReturnMsg( "age should not be null or empty" );<br>
7. | end<br>
<br>
where setReturnMsg is a method of ApplicationData Fact();<br>
<br>
However, I got the validation error :<br>
<br>
[Rule1] [ERR 101] Line 4:49 no viable alternative at input ')' in rule<br>
"Rule1" in pattern ApplicationData<br>
[Rule1] [ERR 102] Line 4:51 mismatched input '==' expecting ')' in<br>
rule "Rule1" in pattern ApplicationData<br>
<br>
Please help what the problem is.<br>
<br>
<br>
Thanks<br>
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</blockquote></div><br>