Module org.tentackle.sql

Package org.tentackle.sql.metadata

Enum ForeignKeyAction

java.lang.Object

java.lang.Enum<ForeignKeyAction>

org.tentackle.sql.metadata.ForeignKeyAction

All Implemented Interfaces:

Serializable, Comparable<ForeignKeyAction>

public enum ForeignKeyAction
extends Enum<ForeignKeyAction>

Enum for foreign key actions.

Author:

harald

Enum Constant Summary

Enum Constants

Enum Constant	Description
CASCADE	When the primary key is updated, the foreign key (imported key) is changed to agree with it.
INITIALLY_DEFERRED	Indicates deferrability.
INITIALLY_IMMEDIATE	Indicates deferrability.
NO_ACTION	If the primary key has been imported, it cannot be updated or deleted.
NOT_DEFERRABLE	Indicates deferrability.
RESTRICT	The primary key may not be updated if it has been imported by another table as a foreign key.
SET_DEFAULT	If the primary key is updated or deleted, the foreign key (imported key) is set to the default value.
SET_NULL	When the primary key is updated or deleted, the foreign key (imported key) is changed to NULL..

Method Summary

Modifier and Type	Method	Description
static ForeignKeyAction	createFromAction(int action)	Creates a foreign key action from an action code.
int	getAction()	Gets the action code.
String	getSql()	Gets the SQL code.
String	toString()
static ForeignKeyAction	valueOf(String name)	Returns the enum constant of this type with the specified name.
static ForeignKeyAction[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

CASCADE

public static final ForeignKeyAction CASCADE

When the primary key is updated, the foreign key (imported key) is changed to agree with it.

RESTRICT

public static final ForeignKeyAction RESTRICT

The primary key may not be updated if it has been imported by another table as a foreign key.

SET_NULL

public static final ForeignKeyAction SET_NULL

When the primary key is updated or deleted, the foreign key (imported key) is changed to NULL..

NO_ACTION

public static final ForeignKeyAction NO_ACTION

If the primary key has been imported, it cannot be updated or deleted.

SET_DEFAULT

public static final ForeignKeyAction SET_DEFAULT

If the primary key is updated or deleted, the foreign key (imported key) is set to the default value.

INITIALLY_DEFERRED

public static final ForeignKeyAction INITIALLY_DEFERRED

Indicates deferrability. See SQL-92 for a definition.

INITIALLY_IMMEDIATE

public static final ForeignKeyAction INITIALLY_IMMEDIATE

Indicates deferrability. See SQL-92 for a definition.

NOT_DEFERRABLE

public static final ForeignKeyAction NOT_DEFERRABLE

Indicates deferrability. See SQL-92 for a definition.

Method Detail

values

public static ForeignKeyAction[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ForeignKeyAction c : ForeignKeyAction.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ForeignKeyAction valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

getAction

public int getAction()

Gets the action code.

Returns:

the action code

getSql

public String getSql()

Gets the SQL code.

Returns:

the sql

toString

public String toString()

Overrides:

toString in class Enum<ForeignKeyAction>

createFromAction

public static ForeignKeyAction createFromAction(int action)

Creates a foreign key action from an action code.

Parameters:

action - the code

Returns:

the foreign key action, null if invalid code