Re: [rules-users] Challenge! Using javassist and drools presents an issue with drl
Isn't the simplest solution just to add the imports at the start of the imported drl
file?
That is the users don't need to worry about writing the imports but before you feed
the files into your code simply prepends the required imports.
You can do this easily in memory with something like the following:
StringWriter drlContents = new StringWriter();
drlContents.write("import ...\n");
FileInputStream stream = new FileInputStream(drlFile);
InputStreamReader inR = new InputStreamReader(stream, "UTF-8");
IOUtils.copy(inR, drlContents);
kbuilder.add(ResourceFactory.newReaderResource(new StringReader(drlContents.toString())),
ResourceType.DRL);
Thomas
-----Original Message-----
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-
bounces(a)lists.jboss.org] On Behalf Of Dave Cracauer
Sent: 28 April 2010 19:35
To: Rules Users List; rules-users(a)lists.jboss.org
Subject: Re: [rules-users] Challenge! Using javassist and drools presents an
issue with drl
It sounds like the stated goal is to make things easier for non-developers to
write rules. What about a dsl?
What about using a templating language? I have used velocity in the past for
dynamically generating rules based on templates, and I think that there is
built in support for templates using mvel.
-----Original Message-----
>From: markricard <markricard(a)gmail.com>
>Sent: Apr 28, 2010 11:53 AM
>To: rules-users(a)lists.jboss.org
>Subject: Re: [rules-users] Challenge! Using javassist and drools presents an
issue with drl
>
>
>Perhaps there is an easier way to ask this question....
>
>Rather than having to do an 'import' of a class in a drl text file, is there
>a way in the Java code that constructs the KnowledgeBase to via java
>dynamically import any class file required by any drl file that is added?
>
>Instead of the drl having:
>
>import com.foo.Instance;
>rule "Walgreens Test"
> ....
>
>It just has:
>
>rule "Walgreens Test"
> ....
>
>
>And in the KnowledgeBuilder does something like this:
>
>KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
>kbuilder.addImport("com.foo.Instance");
>...
>
>
>
>--
>View this message in context: http://drools-java-rules-
engine.46999.n3.nabble.com/Challenge-Using-javassist-and-drools-presents-an-
issue-with-drl-tp763086p763118.html
>Sent from the Drools - User mailing list archive at Nabble.com.
>_______________________________________________
>rules-users mailing list
>rules-users(a)lists.jboss.org
>https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
**************************************************************************************
This message is confidential and intended only for the addressee. If you have received
this message in error, please immediately notify the postmaster(a)nds.com and delete it from
your system as well as any copies. The content of e-mails as well as traffic data may be
monitored by NDS for employment and security purposes. To protect the environment please
do not print this e-mail unless necessary.
NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United
Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603
8808 40-00
**************************************************************************************
This message is confidential and intended only for the addressee. If you have received
this message in error, please immediately notify the postmaster(a)nds.com and delete it from
your system as well as any copies. The content of e-mails as well as traffic data may be
monitored by NDS for employment and security purposes.
To protect the environment please do not print this e-mail unless necessary.
An NDS Group Limited company. www.nds.com