[jboss-jira] [JBoss JIRA] Updated: (JBRULES-1179) Premature rule execution

[Mark Proctor (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBRULES-1179?page=all ]

Mark Proctor updated JBRULES-1179:
----------------------------------

    Fix Version/s: 4.0.2
         Assignee: Edson Tirelli  (was: Mark Proctor)

> Premature rule execution
> ------------------------
>
>                 Key: JBRULES-1179
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-1179
>             Project: JBoss Rules
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 4.0.1
>         Environment: JDK 1.5, Mac OS X 10.4
>            Reporter: Markus Reitz
>         Assigned To: Edson Tirelli
>             Fix For: 4.0.2
>
>
> Using the rules
>   package test
>   
>   rule "A"
>   
>     when
>       exists(x : String() and
>              y : String(this!=x))
>            
>     then
>       System.out.println("x!=y exists.");
>   end
>   
>   rule "B"
>   
>     when
>       not(exists(x : String() and
>                  y : String(this!=x)))
>            
>     then
>       System.out.println("x!=y does not exist.");
>   end
> as input for the following program (java DroolsTest <name of rule file>)
>   import org.drools.*;
>   import org.drools.compiler.*;
>   import org.drools.rule.Package;
>   import java.io.*;
>   public class DroolsTest {
>     private RuleBase        rules;
>     private StatefulSession memory;
>     public DroolsTest(File file) throws Exception {
>       rules =RuleBaseFactory.newRuleBase();
>       memory=rules.newStatefulSession();
>     
>       rules.addPackage(loadPackage(file));
>     }
>     protected Package loadPackage(File file) throws IOException {
>       FileInputStream stream=null;
>     
>       try {
>         stream=new FileInputStream(file);
>     
>         return(loadPackage(stream));
>       }
>       finally {
>         if (stream!=null)
>           stream.close();
>       }
>     }
>     protected Package loadPackage(InputStream stream) throws IOException {
>       try {
>         PackageBuilder builder=new PackageBuilder();
>         builder.addPackageFromDrl(new InputStreamReader(stream));
>         return(builder.getPackage());
>       }
>       catch(Exception ex) {
>         throw new IOException();
>       }
>     }
>   
>     public StatefulSession getSession() {
>       return(memory);
>     }
>   
>     public static void main(String ... args) {
>       try {
>         DroolsTest test=new DroolsTest(new File(args[0]));
>       
>         System.out.println("Inserting ...");
>       
>         test.getSession().insert(new String("42"));
>         test.getSession().insert(new String("42"));
>         test.getSession().insert(new String("1701"));
>         test.getSession().insert(new String("0815"));
>         test.getSession().insert(new String("4711"));
>         System.out.println("Done.");
>       
>         System.out.println("Firing rules ...");
>       
>         test.getSession().fireAllRules();
>       
>         System.out.println("Done.");
>       }
>       catch (Exception ex) {
>         ex.printStackTrace();
>       }
>     }
>   }
> creates the output
>   x!=y does not exist.
>   Inserting ...
>   Done.
>   Firing rules ...
>   x!=y exists.
>   Done.
> Premature firing of rules seems to occur ("x!=y does not exist" before fireAllRules is invoked), which is not the expected behaviour.

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