io.permazen.annotation

Annotation Type JFieldType

@Retention(value=RUNTIME)
 @Target(value={ANNOTATION_TYPE,TYPE})
 @Documented
public @interface JFieldType

Java annotation for classes that define custom FieldTypes for a Permazen's underlying Database. These classes will be automatically instantiated and registered with the associated FieldTypeRegistry.

Annotated classes must extend FieldType and have a zero-parameter constructor.

Note that once a certain encoding has been used for a given type name in a database, the encoding should not be changed without creating a new type (and type name), or changing the encoding signature. Otherwise, InconsistentDatabaseExceptions can result when the new type unexpectedly encounters the old encoding or vice-versa.

Meta-Annotations

This annotation may be configured indirectly as a Spring meta-annotation when spring-core is on the classpath.