Difference between revisions of "EclipseLink/UserGuide/JPA/Basic JPA Development/Mapping/Basic Mappings/Default Conversions and Converters/Convert"

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*[http://www.eclipse.org/eclipselink/api/latest/org/eclipse/persistence/annotations/Convert.html @Convert]
 
*[http://www.eclipse.org/eclipselink/api/latest/org/eclipse/persistence/mappings/converters/SerializedObjectConverter.html SerializedObjectConverter]
 
*[http://www.eclipse.org/eclipselink/api/latest/org/eclipse/persistence/mappings/converters/SerializedObjectConverter.html SerializedObjectConverter]
 
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Revision as of 15:20, 2 May 2011

EclipseLink JPA

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@Convert Annotation

The @Convert annotation specifies that a named converter should be used with the corresponding mapped attribute.

 @Target({METHOD, FIELD})
 @Retention(RUNTIME)
 public @interface Convert {
    String value() default "none";
 }

The @Convert has the following reserved names:

  • serialized – places the org.eclipse.persistence.mappings.converters.SerializedObjectConverter on the associated mapping.
  • none – does not place a converter on the associated mapping.
@Convert Annotation Attributes
Attribute Description Default Required?
value The String name for your converter. "none" String No


The following example shows how to use the @Convert annotation to define the Employee field gender.

Example: @Convert Annotation
 @Entity
 @Table(name="EMPLOYEE")
 @Converter(
     name="genderConverter",
         converterClass=org.myorg.converters.GenderConverter.class
 )
 public class Employee implements Serializable{
     ...
     @Basic
     @Convert("genderConverter")
     public String getGender() {
         return gender;
     }
     ...
 }



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