[CAUSEWAY-488] Derive Isis' MandatoryFacet from JDO @Column(allowNulls=) annotation, and provide @Mandatory annotation as override

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: objectstore-jdo-1.1.0
• Fix Version/s: objectstore-jdo-1.3.0
• Component/s: Persistence JDO
• Assignee: Daniel Keir Haywood
• Reporter: Daniel Keir Haywood
• Created: 06/Aug/13 08:34
• Updated: 25/Oct/13 08:47
• Resolved: 07/Aug/13 06:38

Description

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()

{ ... }