[jboss-jira] [JBoss JIRA] Resolved: (JBRULES-3052) CCE when using variable bound to accumulate function in RHS code

[Edson Tirelli (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-3052?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Edson Tirelli resolved JBRULES-3052.
------------------------------------

    Resolution: Done


As discussed over the IRC, this is fixed now. The traditional "from accumulate" syntax supports only a single accumulate function. The top level accumulate CE supports multiple functions.

> CCE when using variable bound to accumulate function in RHS code
> ----------------------------------------------------------------
>
>                 Key: JBRULES-3052
>                 URL: https://issues.jboss.org/browse/JBRULES-3052
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-compiler (expert)
>    Affects Versions: 5.2.0.M2
>            Reporter: Wolfgang Laun
>            Assignee: Edson Tirelli
>             Fix For: 5.2.0.CR1
>
>
> The rule in the test case crashes during execution with 
> java.lang.ClassCastException: java.lang.Double cannot be cast to [Ljava.lang.Object;
>         at org.drools.base.extractors.ArrayElementReader.getValue(ArrayElementReader.java:162)
>         at org.drools.rule.Declaration.getValue(Declaration.java:219)
> This is meant to be part of AccumulateTest.java.
>    public void execTestAccumulateMinMax() throws Exception {
>         String drl = "package org.drools.test; " +
>         		"import org.drools.Cheese; " +
>         		"global java.util.List results; " +
>         		"rule minMax " +
>                 "when " +
>                 "$min1: Number( $min2: intValue ) " +
>                 "from accumulate( Cheese( $p: price ), $min3: min($p), $max: max($p) ) " +
>                 "then " +
>                 "results.add($min1); results.add($min2); results.add($min3); results.add($max); " +
>                 "end ";        
>         
>         final Reader reader = new StringReader( drl );
>         final RuleBase ruleBase = loadRuleBase( reader );
>         final WorkingMemory wm = ruleBase.newStatefulSession();
>         final List results = new ArrayList();
>         wm.setGlobal( "results", results );
>         final Cheese[] cheese = new Cheese[]{
>                 new Cheese( "Emmentaler",        4 ),
>                 new Cheese( "Appenzeller",       6 ),
>                 new Cheese( "Greyerzer",         2 ),
>                 new Cheese( "Raclette",          3 ),
>                 new Cheese( "Olmützer Quargel", 15 ),
>                 new Cheese( "Brie",             17 ),
>                 new Cheese( "Dolcelatte",        8 ) };
>         final FactHandle[] cheeseHandles = new FactHandle[cheese.length];
>         for ( int i = 0; i < cheese.length; i++ ) {
>             cheeseHandles[i] = wm.insert( cheese[i] );
>         }
>         // ---------------- 1st scenario
>         wm.fireAllRules();
>         assertEquals( 4, results.size() );
>         assertEquals( results.get(0), Integer.valueOf( 2 ) );
>         assertEquals( results.get(1), Integer.valueOf( 2 ) );
>         assertEquals( results.get(2), Integer.valueOf( 2 ) );
>         assertEquals( results.get(3), Integer.valueOf( 17 ) );
>     }
>     

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