[GROOVY-2514] ExpandoMetaClass returns expando properties twice

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.5.1
• Fix Version/s: 1.5.2
• Component/s: groovy-jdk
• Environment: WIndows XP SP 2
• Assignee: Graeme Rocher
• Reporter: Christoph Hartmann
• Created: 18/Jan/08 08:37
• Updated: 08/Feb/08 01:26
• Resolved: 18/Jan/08 09:09

Description

i like to use the ExpandoMetaClass to add properties and methods during runtime.
For testing purposes I wrote:

class Foo{

}
println Foo.metaClass
def a1 = new Foo();
println a1.metaClass.class

Foo.metaClass.expando = true;

println Foo.metaClass.class
def a2 = new Foo();
println a2.metaClass.class

a2.metaClass.test = "value"
println a2.test
println a2.metaClass.properties.name

Unfortunately "println a2.metaClass.properties.name" returns
["expando", "test", "class", "expando", "metaClass", "test"]

I think this is related to the getProperties method in ExpandoMetaClass:

public List getProperties()

{ List propertyList = new ArrayList(); propertyList.addAll(expandoProperties.values()); propertyList.addAll(super.getProperties()); return propertyList; }

At first it reads the properties form the local list and adds the properties for MetaClassImpl afterwards. Why are all expando properties are hold twice?