Package org.apache.openjpa.jdbc.meta.strats

Class ClassNameDiscriminatorStrategy

java.lang.Object

org.apache.openjpa.jdbc.meta.strats.AbstractStrategy

org.apache.openjpa.jdbc.meta.strats.AbstractDiscriminatorStrategy

org.apache.openjpa.jdbc.meta.strats.InValueDiscriminatorStrategy

org.apache.openjpa.jdbc.meta.strats.ClassNameDiscriminatorStrategy

All Implemented Interfaces:

Serializable, DiscriminatorStrategy, Strategy

public class ClassNameDiscriminatorStrategy
extends InValueDiscriminatorStrategy

Stores the class name along with each database object record.

Author:

Abe White

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ALIAS

Fields inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractDiscriminatorStrategy

disc, isFinal

Constructor Summary

Constructors

Constructor	Description
ClassNameDiscriminatorStrategy()

Method Summary

Modifier and Type	Method	Description
String	getAlias()	Return the alias of this strategy.
protected Class	getClass(Object val, JDBCStore store)	Convert the given discriminator value to the corresponding class.
protected Object	getDiscriminatorValue(ClassMapping cls)	Return the discriminator value for the given type.
protected int	getJavaType()	Return the Java type code from JavaTypes for the discriminator values.
void	loadSubclasses(JDBCStore store)	By default, logs a warning that this discriminator cannot calculate its list of subclasses on its own.

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.InValueDiscriminatorStrategy

getClass, getClassConditions, hasClassConditions, insert, map, select

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractDiscriminatorStrategy

setDiscriminator

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractStrategy

customDelete, customInsert, customUpdate, delete, initialize, isCustomDelete, isCustomInsert, isCustomUpdate, update

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.openjpa.jdbc.meta.Strategy

customDelete, customInsert, customUpdate, delete, initialize, isCustomDelete, isCustomInsert, isCustomUpdate, update

Field Details

ALIAS

public static final String ALIAS

See Also:

• Constant Field Values

Constructor Details

ClassNameDiscriminatorStrategy

public ClassNameDiscriminatorStrategy()

Method Details

getAlias

public String getAlias()

Description copied from interface: Strategy

Return the alias of this strategy. For custom strategies, return the full class name.

Specified by:

getAlias in interface Strategy

Overrides:

getAlias in class AbstractStrategy

getJavaType

protected int getJavaType()

Description copied from class: InValueDiscriminatorStrategy

Return the Java type code from JavaTypes for the discriminator values. This method is only used during mapping installation.

Specified by:

getJavaType in class InValueDiscriminatorStrategy

getDiscriminatorValue

protected Object getDiscriminatorValue(ClassMapping cls)

Description copied from class: InValueDiscriminatorStrategy

Return the discriminator value for the given type.

Specified by:

getDiscriminatorValue in class InValueDiscriminatorStrategy

getClass

protected Class getClass(Object val,
 JDBCStore store)
                  throws ClassNotFoundException

Description copied from class: InValueDiscriminatorStrategy

Convert the given discriminator value to the corresponding class.

Specified by:

getClass in class InValueDiscriminatorStrategy

Throws:

ClassNotFoundException

loadSubclasses

public void loadSubclasses(JDBCStore store)
                    throws SQLException,
ClassNotFoundException

Description copied from class: AbstractDiscriminatorStrategy

By default, logs a warning that this discriminator cannot calculate its list of subclasses on its own.

Specified by:

loadSubclasses in interface DiscriminatorStrategy

Overrides:

loadSubclasses in class AbstractDiscriminatorStrategy

Throws:

SQLException

ClassNotFoundException