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.
There is no API for extracting parts of a spreadsheet. You can look at
the Drools source code (in the packages org.drools.decisiontable and
.../parser) and write whatever you need - it is not too difficult.
You can also look at drools-verifier, as that shows ho to analyse
resulting rule fragments.
Mark
-W
On 3 October 2011 17:05, RaviCKota<Ravi.Kota@wellsfargo.com> wrote:
Hi All, for suppose I have a DecisionTable like below
CONDITION ACTION
-----------------------------
COND1 ACTION1
COND2 ACTION2
COND3 ACTION3
-----------------------------
This is just a representation of the DecisionTable. So I need to retrieve
all the conditions and store them into a Collection like Set. Does Drools
provide any such feature.
We load the drools as below
PackageBuilder builder = new PackageBuilder();
builder.addPackageFromDrl(new StringReader(drl)); //drl is the filepath of
decisiontable excel
// add the package to a rulebase (deploy the rule package).
RuleBase ruleBase = RuleBaseFactory.newRuleBase();
ruleBase.addPackage(builder.getPackage());
I tried to look into api of RuleBase, tried to get the packages, Rules,
Consequence, etc etc, but could not find any method, that gets me the
condition name.
When I tried to do
Package[] packages = rulebase.getPackages();
for(Package pack : packages){
System.out.println("Package Name is : "+pack.getName());
Rule[] rules = pack.getRules();
for(Rule rule : rules){
System.out.println("Rule name is : "+rule.getName());
All I get is some representation of each row, but I'm specifically looking
for the value of the first column (CONDITION) for each rule.
Please offer some guidance here.
--
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