[rules-dev] Possible drools bug when using metadata @key

The exception: java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor Impl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.drools.lang.RuleParserTest.execTreeParser(RuleParserTest.java:4071) at org.drools.lang.RuleParserTest.newParser(RuleParserTest.java:4038) at org.drools.lang.RuleParserTest.parse(RuleParserTest.java:3996) at org.drools.lang.RuleParserTest.parseResource(RuleParserTest.java:4025) at org.drools.lang.RuleParserTest.testTypeDeclaration1(RuleParserTest.java: 3762) Caused by: java.lang.NullPointerException at org.drools.lang.descr.DescrFactory.createTypeField(DescrFactory.java:401 ) at org.drools.lang.DescrBuilderTree.decl_field(DescrBuilderTree.java:1758) at org.drools.lang.DescrBuilderTree.type_declaration(DescrBuilderTree.java: 1592) at org.drools.lang.DescrBuilderTree.statement(DescrBuilderTree.java:575) at org.drools.lang.DescrBuilderTree.compilation_unit(DescrBuilderTree.java: 222) ... 34 more Here is the drl that causes it: [declare_type_1.drl] package org.drools; declare NetworkNode locElevation: java.math.BigDecimal name: String @key nodeClass: String locLongitude: java.math.BigDecimal nodeType: String locLatitude: java.math.BigDecimal end declare NetworkConnection id: String @key node1: NetworkNode node2: NetworkNode hops: Integer end declare NetworkEvent @role( event ) @timestamp( creationTime ) id: String @key locElevation: java.math.BigDecimal description: String sourceComponent: NetworkNode locLongitude: java.math.BigDecimal severity: Integer creationTime: java.util.Date locLatitude: java.math.BigDecimal end the test function in RuleParserTest.java you can use to replicate: public void testTypeDeclaration1() throws Exception { parseResource( "compilation_unit", "compilation_unit", "declare_type_1.drl" ); final PackageDescr pack = walker.getPackageDescr(); final List<TypeDeclarationDescr> declarations = pack.getTypeDeclarations(); assertEquals( 3, declarations.size() ); } I believe @key is the cause, I based my code on the example from the documentation: declare Person @author( Bob ) @dateOfCreation( 01-Feb-2009 ) name : String @key @maxLength( 30 ) dateOfBirth : Date address : Address end Regards --zoly