javax.persistence.Converter Maven / Gradle / Ivy
Show all versions of javax.persistence Show documentation
/*******************************************************************************
* Copyright (c) 2011 - 2013 Oracle Corporation. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Linda DeMichiel - Java Persistence 2.1
*
******************************************************************************/
package javax.persistence;
import java.lang.annotation.Target;
import java.lang.annotation.Retention;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* Specifies that the annotated class is a converter and defines its
* scope. A converter class must be annotated with the Converter
* annotation or defined in the object/relational mapping descriptor as
* a converter.
*
* If the autoApply element is specified as
* true, the persistence provider must automatically
* apply the converter to all mapped attributes of the specified
* target type for all entities in the persistence unit except for
* attributes for which conversion is overridden by means of the
* Convert annotation (or XML equivalent).
*
*
In determining whether a converter is applicable to an attribute,
* the provider must treat primitive types and wrapper types as
* equivalent.
*
*
Note that Id attributes, version attributes, relationship
* attributes, and attributes explicitly annotated as
* Enumerated or Temporal (or designated as
* such via XML) will not be converted.
*
*
Note that if autoApply is true, the
* Convert annotation may be used to override or disable
* auto-apply conversion on a per-attribute basis.
*
*
If autoApply is false, only those
* attributes of the target type for which the Convert
* annotation (or corresponding XML element) has been specified will
* be converted.
*
*
If there is more than one converter defined for the same target
* type, the Convert annotation should be used to
* explicitly specify which converter to use.
*
* @see AttributeConverter
* @see Convert
*
* @since Java Persistence 2.1
*/
@Target({TYPE}) @Retention(RUNTIME)
public @interface Converter {
boolean autoApply() default false;
}