[SIS-116] Support gco:uuid and href on primitive types

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 0.3
• Component/s: Metadata
• Assignee: Unassigned
• Reporter: Martin Desruisseaux
• Created: 05/Aug/13 11:08
• Updated: 26/May/18 08:44

Description

Metadata objects can specified gco:uuid, xlink:href and similar attributes by implementing the org.apache.sis.xml.IdentifiedObject interface. However we can not do that for JDK final classes like Integer and String. This is a problem similar to the one described in SIS-115 (NilReason for primitive types) and may be solved in a similar way. We have not yet solved this problem because the use case for gco:uuid or xlink:href attributes on elements as small as Integer or String are unclear at this stage.

If nevertheless the above-cited support for identifiers is needed, then we could proceed as below:

• In org.apache.sis.internal.jaxb.gco.PropertyType, complete the PropertyType(BoundType value, boolean mayBeNil) constructor in order to check for XLink and UUID in addition to NilReason.
• Search usages of the above constructor. Conditions like value.intValue() == 0 may need to be removed.
• We may need to provide a special implementation of org.apache.sis.xml.IdentifierMap which delegate its work to the org.apache.sis.internal.jaxb.PrimitiveTypeProperties static methods.
• We may need to provide some static method (location to be determined) returning an IdentifierMap for a given Object, something similar to what we currently have in NilReason.forObject(Object).

Issue Links

• relates to: SIS-115 Ability to set NilReason on Boolean, Integer, Double and String objects
• relates to: SIS-173 Support references from xlink:href to gml:id