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From "Martin Desruisseaux (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SIS-290) Complete JAXB annotations for OperationParameter and ParameterValue
Date Thu, 03 Sep 2015 16:51:47 GMT

     [ https://issues.apache.org/jira/browse/SIS-290?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Martin Desruisseaux resolved SIS-290.
-------------------------------------
    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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