org.eclipse.persistence.queries

Enum ReadAllQuery.Direction

java.lang.Object

java.lang.Enum<ReadAllQuery.Direction>

org.eclipse.persistence.queries.ReadAllQuery.Direction

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<ReadAllQuery.Direction>

Enclosing class:

ReadAllQuery

public static enum ReadAllQuery.Direction
extends java.lang.Enum<ReadAllQuery.Direction>

Specifies the direction in which the hierarchy is traversed in a hierarchical query.

Enum Constant Summary

Enum Constants

Enum Constant and Description
CHILD_TO_PARENT Hierarchy will be traversed from child to parent - PRIOR keyword is generated on the right side of the equation
PARENT_TO_CHILD Hierarchy will be traversed from parent to child - PRIOR keyword is generated on the left side of the equation

Method Summary

Modifier and Type	Method and Description
static ReadAllQuery.Direction	getDefault(DatabaseMapping mapping) PUBLIC: Returns the default hierarchy traversal direction for the specified mapping.
static ReadAllQuery.Direction	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static ReadAllQuery.Direction[]	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, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

PARENT_TO_CHILD

public static final ReadAllQuery.Direction PARENT_TO_CHILD

Hierarchy will be traversed from parent to child - PRIOR keyword is generated on the left side of the equation

CHILD_TO_PARENT

public static final ReadAllQuery.Direction CHILD_TO_PARENT

Hierarchy will be traversed from child to parent - PRIOR keyword is generated on the right side of the equation

Method Detail

values

public static ReadAllQuery.Direction[] 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 (ReadAllQuery.Direction c : ReadAllQuery.Direction.values())
    System.out.println(c);

Returns:

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

valueOf

public static ReadAllQuery.Direction valueOf(java.lang.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:

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

java.lang.NullPointerException - if the argument is null

getDefault

public static ReadAllQuery.Direction getDefault(DatabaseMapping mapping)

PUBLIC: Returns the default hierarchy traversal direction for the specified mapping.
For OneToOne mappings, source in parent object goes to target in child object, collections are the opposite way.

Parameters:

mapping - The mapping for which to return default hierarchy traversal direction

Returns:

The default hierarchy traversal direction for the mapping passed