Martin Desruisseaux created SIS-566:
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Summary: Remove instantiation of primitive wrappers
Key: SIS-566
URL: https://issues.apache.org/jira/browse/SIS-566
Project: Spatial Information Systems
Issue Type: Task
Components: Metadata
Affects Versions: 1.3, 1.2, 1.1, 1.0, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3
Reporter: Martin Desruisseaux
Fix For: 1.4
In the {{org.apache.sis.xml.NilReason}} class, the private
{{createNilPrimitive(Class)]] method instantiate new {{Boolean}}, {{Byte}},
{{Short}}, {{Integer}}, {{Long}}, {{Float}} or {{Double}} object by invoking
directly their constructor. The {{valueOf(…)}} method can not be used in this
context, because we really need new instances. They are used for identifying a
particular instances as a nil object.
This pattern will soon not work anymore, because those primitive wrappers will
become _value object_. The constructors that we are invoking will be removed,
and the identity comparison that we rely on will not work anymore.
I'm not aware of a complete substitute for the functionality. We may loose the
capability to flag some `Integer` values as "nil value". Possible alternatives
may be:
* For values that are supposed to be measurements, use
{{javax.measure.Quantity}} instead.
* For other kind of values, use {{Number}} instead. A good side effect is to
allow the use of {{BigInteger}} or {{BigDecimal}} if the implementation wants
to do so.
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