172 words

javax.jdo.annotations.Unique - JDO annotation

javax.jdo.annotations
Annotation Unique

Target:
Classes and fields (including property get methods)
Annotation for a database unique constraint. Used for database schema generation to create unique constraints. Also used to reorder database operations when flushing changes to avoid unique constraint violations. Corresponds to the xml element "unique".
Since:
JDO 2.1
Columns that compose this unique constraint.
Columns that compose this unique constraint.
Returns:
columns that compose this unique constraint
Default value:
{}
Since:
JDO 2.1
String deferred
Whether this unique constraint is deferred until commit.
Whether this unique constraint is deferred until commit.
Returns:
whether this unique constraint is deferred until commit
Default value:
""
Since:
JDO 2.1
String[] members
Member (field and property) names that compose this unique constraint.
Member (field and property) names that compose this unique constraint.
Returns:
member names that compose this unique constraint
Default value:
{}
Since:
JDO 2.1
String name
Name of the unique constraint.
Name of the unique constraint.
Returns:
the name of the unique constraint
Default value:
""
Since:
JDO 2.1
String table
Table for the unique constraint.
Table for the unique constraint. This is needed iff annotating a type where this unique constraint is not for the primary table for the persistent class or interface.
Returns:
the table on which the unique constraint is defined
Default value:
""
Since:
JDO 2.1

This documentation page is derived (with some adjustments) from the JDO 2.2 API
and is available under the terms of the Apache License, v. 2.0.