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https://issues.apache.org/jira/browse/SIS-416?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martin Desruisseaux updated SIS-416:
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Fix Version/s: (was: 1.3)
> Consider adding StoreResource interface
> ---------------------------------------
>
> Key: SIS-416
> URL: https://issues.apache.org/jira/browse/SIS-416
> Project: Spatial Information Systems
> Issue Type: Task
> Components: Storage
> Affects Versions: 0.8, 1.0, 1.1, 1.2
> Reporter: Martin Desruisseaux
> Assignee: Martin Desruisseaux
> Priority: Major
>
> The {{org.apache.sis.storage}} package contains a {{Resource}} interface
> which is the root of all resources loaded by a data store ({{FeatureSet}},
> {{Aggregate}}, _etc._). The resources do not tell us which data store created
> them. In some case we need this information, for example in order to fetch
> the parameters used for opening the data store.
> We could add {{getOriginatingStore()}} method in {{Resource}} interface, but
> not all resources are produced by a data store (a resource could be computed
> by a model for example). We could use an {{Optional<DataStore>}} return type,
> but {{Optional}} is not convenient with objects making extensive use of
> checked exceptions, because lambda functions are difficult to use in that
> context.
> A an alternative would be to define the {{getOriginatingStore()}} method in a
> {{StoreResource}} sub-interface, to be implemented only by resources produced
> by data stores. It would be the only method of that interface.
> Inconvenient of {{StoreResource}} sub-interface:
> * it is very easy to forget to implement it.
> * It is more difficult to implement by wrappers (need to prepare many
> sub-classes for different combination of implemented interfaces).
> * Adding a type expands the API in a more intrusive way than adding a method.
> Inconvenient of method with {{Optional<DataStore>}} return type:
> * Most {{Optional}} methods are unusable because of checked exceptions.
> * This method make little sense in {{DataStore}} (which is itself a
> {{Resource}}).
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