Parenthesized class name causes NPE in RuleBuilder (MVEL) --------------------------------------------------------- Key: JBRULES-3134 URL: https://issues.jboss.org/browse/JBRULES-3134 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Affects Versions: 5.2.0.Final Reporter: Wolfgang Laun Assignee: Mark Proctor Fix For: 5.2.1.Final declare Foo clazz : Class end rule testFoo when Foo( clazz == (java.lang.Object) ) then System.out.println( "Foo is Object" ); end causes Exception in thread "main" [Error: not a statement, or badly formed structure] [Near : {... (java.lang.Object) ....}] ^ [Line: 1, Column: 19] at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:307) at org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:69) at org.mvel2.MVEL.analysisCompile(MVEL.java:668) at org.mvel2.MVEL.analysisCompile(MVEL.java:672) at org.drools.rule.builder.PatternBuilder.setInputs(PatternBuilder.java:779) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:540) at org.drools.rule.builder.PatternBuilder.processConstraintsAndBinds(PatternBuilder.java:349) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:264) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:122) at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:65) at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:81) at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1889) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:755) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:365) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:543) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28) at listofthree.Main.setup(Main.java:55) at listofthree.Main.main(Main.java:107) Caused by: java.lang.NullPointerException at java.lang.Class.isAssignableFrom(Native Method) at org.mvel2.DataConversion.canConvert(DataConversion.java:104) at org.mvel2.ast.TypeCast.<init>(TypeCast.java:47) at org.mvel2.compiler.AbstractParser.nextToken(AbstractParser.java:1034) at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:135) ... 17 more -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira