Looking at the SpreadsheetCompiler class you can do something like the following
/**
* Generates DRL from the input stream containing the spreadsheet.
*
*
@param xlsStream
* The stream to the spreadsheet. Uses the first worksheet found
* for the decision tables, ignores others.
*
@param type
* The type of the file
- InputType.CSV or InputType.XLS
*
@param listener
*
*
@return DRL xml, ready for use in drools.
*/
public String compile(final
InputStream xlsStream,
final InputType type,
final RuleSheetListener listener) {
final DecisionTableParser parser = type.createParser( listener );
parser.parseFile( xlsStream );
final Package rulePackage = listener.getRuleSet();
List<Rule> rules = rulePackage.getRules
for(Rule r : rules) {
r.getName();
List<Condition> conditions = r.getConditions();
For(Condition c : conditions) {
String snippet = r.getSnippet();
}
}
final DRLOutput out =
new DRLOutput();
rulePackage.renderDRL( out );
return out.getDRL();
}
Thomas
From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org]
On Behalf Of Wolfgang Laun
Sent: 04 October 2011 08:53
To: Rules Users List
Subject: Re: [rules-users] Is it possible to retrieve the collection of Conditions from DecisionTable?
Since Toni confirms me even before I post this on the list: Using the Verifier way to get at a column from some spreadsheet is not for the faint at heart. In addition to what Toni wrote: source code in the Drools
AST corner isn't even commented.
-W
2011/10/4 Toni Rikkola <toni.rikkola@gmail.com>
If you take a look at the Verifier it goes through the Drools AST with a visitor pattern.
It starts by using getting the PackageDescr using DrlParser, this uses Drools internals so be warned that it might change in the future.
Reader drlReader = new InputStreamReader( stream );
PackageDescr descr = new DrlParser().parse( drlReader );
After that it goes through the PackageDescr using PackageDescrVisitor. RuleDescrVisitor shows how to get the condition part from each rule.
Toni
On Oct 3, 2011, at 8:11 PM, Mark Proctor wrote:
On 03/10/2011 18:03, Wolfgang Laun wrote:
A condition does not have a "name", as you write; values of the cells
below a condition are (usually) literals.