[UIMA-1208] How to get the element type of a uima.cas.FSList feature

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.2.2
• Fix Version/s: 2.3
• Component/s: Core Java Framework

Environment

Fedora 9

• Assignee: Unassigned
• Reporter: Manuel Fiorelli
• Created: 20/Oct/08 17:45
• Updated: 08/Dec/08 20:41
• Resolved: 08/Dec/08 20:41

Description

The documentation

http://incubator.apache.org/uima/downloads/releaseDocs/2.2.2-incubating/docs/html/references/references.html#ugr.ref.xml.component_descriptor.type_system.features

states that in the type system descriptor one may use <elementType> to constraint the type of elements in both array and list features.

However, if one gets the type system of a CAS [myCas.getTypeSystem()],
1) if the feature range is an array, he can retrieve the element type through the method Type.getComponentType()
2) if the feature range is a list, there seems not to be any way to get the element type, since the method Type.getComponentType() returns null