javax.persistence: public class: DiscriminatorColumn

javax.persistence
public class: DiscriminatorColumn [javadoc | source]

javax.persistence.DiscriminatorColumn

Is used to define the discriminator column for the SINGLE_TABLE and JOINED inheritance mapping strategies. The strategy and the discriminator column are only specified in the root of an entity class hierarchy or subhierarchy in which a different inheritance strategy is applied If the DiscriminatorColumn annotation is missing, and a discriminator column is required, the name of the discriminator column defaults to "DTYPE" and the discriminator type to DiscriminatorType.STRING.

author: Emmanuel - Bernard

Method from javax.persistence.DiscriminatorColumn Summary:
columnDefinition, discriminatorType, length, name

Method from javax.persistence.DiscriminatorColumn Detail:
String columnDefinition() { } The SQL fragment that is used when generating the DDL for the discriminator column. Defaults to the provider-generated SQL to create a column of the specified discriminator type.
DiscriminatorType discriminatorType() { } The type of object/column to use as a class discriminator. Defaults to DiscriminatorType.STRING
int length() { } The column length for String-based discriminator types. Ignored for other discriminator types.
String name() { } The name of column to be used for the discriminator.

Method from javax.persistence.DiscriminatorColumn Detail:

 String columnDefinition() {

}

The SQL fragment that is used when generating the DDL for the discriminator column. Defaults to the provider-generated SQL to create a column of the specified discriminator type.

 DiscriminatorType discriminatorType() {

}

The type of object/column to use as a class discriminator. Defaults to DiscriminatorType.STRING

 int length() {

}

The column length for String-based discriminator types. Ignored for other discriminator types.

 String name() {

}

The name of column to be used for the discriminator.