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https://issues.apache.org/jira/browse/SIS-290?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martin Desruisseaux resolved SIS-290.
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Resolution: Fixed
> Complete JAXB annotations for OperationParameter and ParameterValue
> -------------------------------------------------------------------
>
> Key: SIS-290
> URL: https://issues.apache.org/jira/browse/SIS-290
> Project: Spatial Information Systems
> Issue Type: Sub-task
> Components: Referencing
> Reporter: Martin Desruisseaux
> Assignee: Martin Desruisseaux
> Fix For: 0.6
>
>
> Add JAXB annotations on {{DefaultParameterDescriptor}} and
> {{DefaultParameterValue}} for allowing them to read and write
> {{<gml:OperationParameter>}} and {{<gml:ParameterValue>}} respectively.
> The main difficulties in this task are:
> * {{ParameterDescriptor.getValueClass()}} is mandatory for SIS, but GML has
> no notion of "value class".
> ** *Solution:* we can infer this information from the value given by the
> enclosing {{<gml:ParameterValue>}}.
> ** *Limitation:* above solution does not work if the
> {{<gml:OperationParameter>}} is inside a {{<gml:OperationParameterGroup>}} or
> {{<gml:OperationMethod>}} because there is no enclosing
> {{<gml:ParameterValue>}} in such cases.
> *** *Solution to limitation:* see point below.
> * {{ParameterValue.getDescriptor()}} is supposed to be the _same instance_
> (not just an object equals in the sense of {{Object.equals(Object)}} than the
> descriptors listed in {{ParameterDescriptorGroup}}. GML can support that by
> declaring each descriptor only once then using {{gml:idref}} attribute, but
> not all GML documents do that.
> ** *Solution:* after unmarshalling of {{GeneralParameterValue[]}}, map each
> {{GeneralParameterValue.getDescriptor()}} to the descriptor of the same name
> in the {{ParameterDescriptorGroup}}. If they do not have the same properties
> (alias, identifiers, description, remarks, minimum/maximum occurrences, value
> class, value domain, valid values), merge the two descriptors in an
> implementation dependent way. Then ensure that the same descriptor instance
> is used.
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