[rules-users] xdrl, and-constraint-connective and from
Hi.
We're using Drools 5.1.0 together with the xdrl format.
Now we encounter a problem with the <from> element.
We're using it like so:
--cut here--
<dro:and-conditional-element>
<dro:pattern object-type="EMail" identifier="fctv_17263"/>
<dro:pattern object-type="String">
<dro:field-constraint field-name="this">
<dro:literal-restriction evaluator="==" value="true"/>
</dro:field-constraint>
<dro:from>
<dro:expression>fctv_17263.getHeaderValues("X-My-Header");
</dro:expression>
</dro:from>
</dro:pattern>
</dro:and-conditional-element>
--cut here--
Now we simply added an additional field-constraint within an
and-constraint-connective (for a not null check):
--cut here--
<dro:and-conditional-element>
<dro:pattern object-type="EMail" identifier="fctv_17263"/>
<dro:pattern object-type="String">
<dro:and-constraint-connective>
<dro:field-constraint field-name="this">
<dro:literal-restriction evaluator="!=" value="null"/>
</dro:field-constraint>
<dro:field-constraint field-name="this.toLowerCase">
<dro:literal-restriction evaluator="==" value="true"/>
</dro:field-constraint>
</dro:and-constraint-connective>
<dro:from>
<dro:expression>fctv_17263.getHeaderValues("X-My-Header");
</dro:expression>
</dro:from>
</dro:pattern>
</dro:and-conditional-element>
--cut here--
But that dies with a:
java.lang.RuntimeException: org.drools.compiler.DroolsParserException:
org.xml.sax.SAXParseException: <from> is after an invalid element:
org.drools.xml.Handler
at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:545)
at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)
...
...
Caused by: org.drools.compiler.DroolsParserException:
org.xml.sax.SAXParseException: <from> is after an invalid element:
org.drools.xml.Handler
at
org.drools.compiler.PackageBuilder.addPackageFromXml(PackageBuilder.java:304)
at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:468)
... 77 more
As I'm writing this, I encountered this is related to this:
https://jira.jboss.org/browse/JBRULES-2672
I added an updated patch that worksforme to the JIRA.
Maybe someone of the Drools team can verify it?
BTW: all drools-compiler testcases seem to work (5.1.1) after applying
the patch.
Thanks
Veit