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These days trunk snapshot is the best place, as it has all the latest
fixes, this is what will make up 4.0.1 when its releases.<br>
<a class="moz-txt-link-freetext" href="http://cruisecontrol.jboss.com/cc/artifacts/jboss-rules">http://cruisecontrol.jboss.com/cc/artifacts/jboss-rules</a><br>
<br>
Mark<br>
<br>
<br>
Manjax23 wrote:
<blockquote cite="mid:12180147.post@talk.nabble.com" type="cite">
<pre wrap="">I had same problem with 4M2 release. Please upgrade it to either 4.0.0 GA or
4M3 release.
You can also find a sample example ShoppingExample.java and Shopping.drl,
which is self-explanatory.
However, I was not able to test few MVEL features like projections, which i
think if added would make drools even more dynamic.
Thanks,
manjax23
Richard Hoberman wrote:
</pre>
<blockquote type="cite">
<pre wrap="">1. I can't find any mention of dialects anywhere in the Drools 4
manual. Am I missing something?
2. I've tried the following after finding a snippet in the archives for
this list:
package mvanamibia.claim;
import java.lang.Object;
import java.lang.String;
import java.lang.Double;
import java.util.Date;
import java.util.List;
import java.util.ArrayList;
import com.sadalbari.mvanamibia.beans.Claim;
import com.sadalbari.mvanamibia.beans.Mandate;
import com.sadalbari.mvanamibia.beans.SubmissionInfo;
import com.sadalbari.mvanamibia.inspector.ClaimEvaluation;
global ClaimEvaluation evaluation;
rule "hasDateReceived"
dialect "mvel"
when
Claim( submissionInfo == null )
then
evaluation.getViolations().add("missing: date received");
end
but it gives the following exception:
java.lang.NullPointerException
at
org.drools.rule.builder.RuleBuildContext.<init>(RuleBuildContext.java:115)
at
org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:350)
at
org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:233)
at
org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:157)
at
com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.setupWorkingMemory(UnregisteredClaimValidationTest.java:29)
at
com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.testEmptyClaim(UnregisteredClaimValidationTest.java:42)
... Removed 22 stack frames
Thanks
Richard
Mark Proctor wrote:
</pre>
<blockquote type="cite">
<pre wrap="">in theory for nested accessors it should switch to the MVEL dialect
automatically. You only need to specify the MVEL dialect explicitely
for eval, return value and consequences.
Mark
Manjax23 wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I think you should use dialect "mvel" when accessing the nested
accessors.
and I had some trouble with "mvel" dialect in 4M2 release.
Please let me know if it works for you..
Thanks,
Manjax23
Richard Hoberman wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I'm using Drools 4 (M2), which is supposed to support nested accessors*
This works: when Claim( submissionInfo == null), but not this: when
Claim( submissionInfo.date == null)
Rule file, SubmissionInfo.java and exception are below.
What am I missing?
Richard
* See
<a class="moz-txt-link-freetext" href="http://article.gmane.org/gmane.comp.java.drools.user/8079/match=nested+properties">http://article.gmane.org/gmane.comp.java.drools.user/8079/match=nested+properties</a>,
which states "Support to nested accessors, property navigation and
simplified collection, arrays and maps syntax"
Rule File
---------------------------------------------------------------------------------------
package mvanamibia.claim;
import java.lang.Object;
import java.lang.String;
import java.lang.Double;
import java.util.Date;
import java.util.List;
import java.util.ArrayList;
import com.sadalbari.mvanamibia.beans.Claim;
import com.sadalbari.mvanamibia.beans.Mandate;
import com.sadalbari.mvanamibia.beans.SubmissionInfo;
import com.sadalbari.mvanamibia.inspector.ClaimEvaluation;
global ClaimEvaluation evaluation;
rule "hasDateReceived"
when
Claim( submissionInfo.date == null )
then
evaluation.getFailures().add("missing: date received");
end
-----------------------------------------------------------------------------------
Exception
-----------------------------------------------------------------------------------
org.drools.rule.InvalidRulePackage: [19,23]: <a class="moz-txt-link-freetext" href="unknown:19:23">unknown:19:23</a> mismatched
token: [@137,471:471='.',<69>,19:23]; expecting type RIGHT_PAREN
at org.drools.rule.Package.checkValidity(Package.java:368)
at
org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:250)
at
com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.setupWorkingMemory(UnregisteredClaimValidationTest.java:33)
at
com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.testMandateClaim(UnregisteredClaimValidationTest.java:56)
... Removed 22 stack frames
FAILED: testEmptyClaim
org.drools.rule.InvalidRulePackage: [19,23]: <a class="moz-txt-link-freetext" href="unknown:19:23">unknown:19:23</a> mismatched
token: [@137,471:471='.',<69>,19:23]; expecting type RIGHT_PAREN
at org.drools.rule.Package.checkValidity(Package.java:368)
at
org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:250)
at
com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.setupWorkingMemory(UnregisteredClaimValidationTest.java:33)
at
com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.testEmptyClaim(UnregisteredClaimValidationTest.java:42)
... Removed 22 stack frames
------------------------------------------------------
SubmissionInfo (relevant bits)
public class SubmissionInfo implements Serializable {
private Date date;
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
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</blockquote>
<pre wrap="">
</pre>
</blockquote>
<pre wrap="">------------------------------------------------------------------------
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<pre wrap=""><!---->
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