Notice: this Wiki will be going read only early in 2024 and edits will no longer be possible. Please see: https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/wikis/Wiki-shutdown-plan for the plan.
Difference between revisions of "EclipseLink/UserGuide/JPA/Basic JPA Development/Mapping/Basic Mappings/Default Conversions and Converters/Converter"
< EclipseLink | UserGuide | JPA | Basic JPA Development | Mapping | Basic Mappings | Default Conversions and Converters
m |
m |
||
Line 18: | Line 18: | ||
} | } | ||
</source> | </source> | ||
+ | |||
{{EclipseLink_AttributeTable | {{EclipseLink_AttributeTable | ||
|caption=<span id="Table 19-7">@Converter Attributes</span> | |caption=<span id="Table 19-7">@Converter Attributes</span> |
Revision as of 13:50, 15 February 2011
EclipseLink JPA
EclipseLink | |
Website | |
Download | |
Community | |
Mailing List • Forums • IRC • mattermost | |
Issues | |
Open • Help Wanted • Bug Day | |
Contribute | |
Browse Source |
Key API
@Converter Annotation
You can use @Converter annotation to specify a custom converter for modification of the data value(s) during the reading and writing of a mapped attribute.
@Target({TYPE, METHOD, FIELD}) @Retention(RUNTIME) public @interface Converter { String name(); Class converterClass(); }
Attribute | Description | Default | Required? |
---|---|---|---|
name | Set this attribute to the String name for your converter. Ensure that this name is unique across the persistence unit | Yes | |
converterClass | Set this attribute to the Class of your converter. This class must implement the EclipseLink org.eclipse.persistence.mappings.converters.Converter interface. | Yes |
This example shows how to use the @Converter annotation to specify Employee field gender.
Usage of the @Converter Annotation
@Entity public class Employee implements Serializable{ ... @Basic @Converter ( name="genderConverter", converterClass=org.myorg.converters.GenderConverter.class ) @Convert("genderConverter") public String getGender() { return gender; } ... }