[jboss-jira] [JBoss JIRA] Commented: (JBRULES-2872) NPE in AbstractCompositeRestriction when using unbound variables
[
https://issues.jboss.org/browse/JBRULES-2872?page=com.atlassian.jira.plug...
]
Wolfgang Laun commented on JBRULES-2872:
----------------------------------------
Sorry - the unbound variable was NOT the reason for the NPE: There were missing import.
Therefore, when you have
rule x
when
NumberRestriction( valueType == Field.INT || == Field.DOUBLE )
then
...
and Field is not imported, the NPE occurs.
NPE in AbstractCompositeRestriction when using unbound variables
----------------------------------------------------------------
Key: JBRULES-2872
URL: https://issues.jboss.org/browse/JBRULES-2872
Project: Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: drools-compiler
Affects Versions: 5.1.1.FINAL
Reporter: Wolfgang Laun
Assignee: Edson Tirelli
This occurs with a pattern such as
Cell( rowNo == $rano || == $rbno, colNo != $c1no && != $c2no, free contains $i
)
where one or more of the bound variables $* are not bound in previous patterns.
Exception in thread "main" java.lang.NullPointerException
at
org.drools.rule.AbstractCompositeRestriction.getRequiredDeclarations(AbstractCompositeRestriction.java:59)
at
org.drools.rule.MultiRestrictionFieldConstraint.getRequiredDeclarations(MultiRestrictionFieldConstraint.java:73)
at org.drools.rule.Pattern.setConstraintType(Pattern.java:358)
at org.drools.rule.Pattern.addConstraint(Pattern.java:226)
at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:432)
at org.drools.rule.builder.PatternBuilder.buildConstraint(PatternBuilder.java:264)
at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:213)
at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:108)
at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:69)
at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:78)
at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1203)
at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:629)
at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:278)
at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:451)
at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)
at org.drools.examples.sudoku.rules.DroolsUtil.readKnowledgeBase(DroolsUtil.java:33)
at org.drools.examples.sudoku.Main.<init>(Main.java:87)
at org.drools.examples.sudoku.Main.main(Main.java:68)
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