[jboss-jira] [JBoss JIRA] (DROOLS-5216) Rule compilation error when binding fields indexed with square brackets

[Mario Fusco (Jira)]

     [ https://issues.redhat.com/browse/DROOLS-5216?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco updated DROOLS-5216:
--------------------------------
    Sprint: 2020 Week 13-15 (from Mar 23)


> Rule compilation error when binding fields indexed with square brackets
> -----------------------------------------------------------------------
>
>                 Key: DROOLS-5216
>                 URL: https://issues.redhat.com/browse/DROOLS-5216
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 7.35.0.Final
>            Reporter: Matteo Casalino
>            Assignee: Mario Fusco
>            Priority: Major
>         Attachments: binding-field-indexed-with-square-brackets.zip
>
>
> Executable model rule compilation fails on patters that bind a collection field indexed with square brackets
> Example of DRL that fails to compile:
> {noformat}
>     rule "binding field indexed with square brackets"
>     when Pojo($firstItem : integerList[0])
>          Pojo(integerList[this.integerList.size()-1] == $firstItem)
>     then
>     end
> {noformat}
> Error:
> {noformat}
>     Message [id=1, level=ERROR, path=src/main/java/org/drools/reproducer/RulesE96881902F91EBF30C7D6404720A1A94RuleMethods0.java, line=29, column=138
>        text=no suitable method found for bind(org.drools.model.Variable<java.util.Map>,(org.drool[...]et(0))
>         method org.drools.model.PatternDSL.PatternDef.<A>bind(org.drools.model.Variable<A>,org.drools.model.functions.Function1<org.drools.reproducer.Pojo,A>) is not applicable
>           (inference variable A has incompatible bounds
>             equality constraints: java.util.Map
>             lower bounds: java.lang.Integer)
>         method org.drools.model.PatternDSL.PatternDef.<A>bind(org.drools.model.Variable<A>,org.drools.model.functions.Function1<org.drools.reproducer.Pojo,A>,org.drools.model.PatternDSL.ReactOn) is not applicable
>           (cannot infer type-variable(s) A
>             (actual and formal argument lists differ in length))
>         method org.drools.model.PatternDSL.PatternDef.<A,U>bind(org.drools.model.Variable<A>,org.drools.model.Variable<U>,org.drools.model.functions.Function1<U,A>) is not applicable
>           (cannot infer type-variable(s) A,U
>             (actual and formal argument lists differ in length))
> {noformat}
> The example works fine when compiling without executable model.
> Furthermore, the same example expressed with OOPath fails to compile *both with and without executable model*:
> {noformat}
>     rule "binding field indexed with square brackets in OOPath"
>     when Pojo($firstItem : /integerList[0])
>     Pojo(/integerList[this.integerList.size()-1] == $firstItem)
>     then
>     end
> {noformat}
> Error without executable model:
> {noformat}
>     Message [id=1, kieBase=binding-field-indexed-with-square-brackets, level=ERROR, path=org/drools/reproducer/rules.drl, line=4, column=0
>        text=Unable to Analyse Expression /integerList[this.integerList.size()-1] == $firstItem:
>     [Error: Missing left node]
>     [Near : {... /integerList[this.integerList.size()-1] == $firstItem ....}]
> {noformat}
> Error with executable model:
> {noformat}
>     Message [id=1, kieBase=binding-field-indexed-with-square-brackets, level=ERROR, path=org/drools/reproducer/rules.drl, line=-1, column=0
>        text=Unknown field integerList on class java.lang.Integer]
> {noformat}



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