NPE in parser on optional metadata ()

The exception:

java.lang.reflect.InvocationTargetException

at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.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