Okie dokie--
The integration with BeanShell/ANTLR seems mostly complete.
In CVS, look at $ROOT/test_data/ruleset.xml, which I've handily
reproduced here.
I still need to create a friendly API for building RuleSets, and
such, but, we can now read .xml files that contain rules.
Filter conditions and consistent-assignment conditions both seem
to work. Actions (<then>) is just any BeanShell script you might
like. For all intents'n'purposes, it's just Java code, but if
you want to do bsh wackiness, then that's fine by me.
The <param> elements denote your root fact objects; the ones you
explicitly assert into the WorkingMemory.
The <decl> elements are local delcarations for named fact extraction.
You'll notice, in this example, the first condition, which limits
'doc1' to being the <a> element. You'll need something similar until
I implement conflict sets, because the rules engine will happy match
this rule with the combination (doc1, doc2) *and* (doc2, doc1), and
thus would fire twice without the extra filter condition in there.
I'm open to syntax changes (ie, if we decide we don't want explicit
<cond> tags, but rather just a <when> element with newline-separated
expressions, or similar). Just lemme know.
Anyhow, I'll probably roll a release this afternoon for folks who
aren't comfortable with CVS. Though, I still recommend CVS to
stay completely up-to-date.
-bob
<ruleset name="My Rule Set">
<import>org.dom4j.Document</import>
<rule name="My Rule">
<param type="Document">doc1</param>
<param type="Document">doc2</param>
<decl type="String">id</decl>
<when>
<cond>doc1.getRootElement().getName().equals( "a" )</cond>
<cond>id = doc1.selectObject( "string(/a/@id)" )</cond>
<cond>id = doc2.selectObject( "string(/b/@id)" )</cond>
</when>
<then>
System.err.println( " ********** START " );
System.err.println( "doc1: " + doc1 );
System.err.println( "doc2: " + doc2 );
System.err.println( " ********** END " );
</then>
</rule>
</ruleset>
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