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https://issues.apache.org/jira/browse/ISIS-488?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dan Haywood closed ISIS-488.
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> Derive Isis' MandatoryFacet from JDO @Column(allowNulls=) annotation, and
> provide @Mandatory annotation as override
> -------------------------------------------------------------------------------------------------------------------
>
> Key: ISIS-488
> URL: https://issues.apache.org/jira/browse/ISIS-488
> Project: Isis
> Issue Type: New Feature
> Components: Objectstore: JDO
> Affects Versions: objectstore-jdo-1.1.0
> Reporter: Dan Haywood
> Assignee: Dan Haywood
> Priority: Minor
> Fix For: objectstore-jdo-1.3.0
>
>
> Thus:
> @javax.jdo.annotations.Column(allowNulls="false")
> public String getFoo() { ... }
> is mandatory
> @javax.jdo.annotations.Column(allowNulls="true")
> public String getFoo() { ... }
> is optional
> @javax.jdo.annotations.Column
> public int getFoo() { ... }
> is mandatory (JDO default for primitives)
> @javax.jdo.annotations.Column
> public String getFoo() { ... }
> is optional (JDO default for non-primitives)
> ~~~
> In certain circumstances (when using roll-up SUPERCLASS_TABLE inheritance) it
> is necessary to annotate a mandatory property as optional in JDO. To force
> Isis to implement a mandatory check, use the @Mandatory annotation
> eg:
> @javax.jdo.annotations.Inheritance(strategy =
> InheritanceStrategy.SUPERCLASS_TABLE)
> public class SomeSubclass {
> @javax.jdo.annotations.Column(allowNulls="false")
> @Mandatory
> public String getFoo() { ... }
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