org.datanucleus.metadata

Enum RelationType

java.lang.Object

java.lang.Enum<RelationType>

org.datanucleus.metadata.RelationType

All Implemented Interfaces:

Serializable, Comparable<RelationType>

public enum RelationType
extends Enum<RelationType>

Utility class providing enums for the different relation types. TODO Consider adding the other subtypes of relations ... join table, foreign key etc

Enum Constant Summary

Enum Constants

Enum Constant and Description
MANY_TO_MANY_BI
MANY_TO_ONE_BI
MANY_TO_ONE_UNI
NONE
ONE_TO_MANY_BI
ONE_TO_MANY_UNI
ONE_TO_ONE_BI
ONE_TO_ONE_UNI

Method Summary

Modifier and Type	Method and Description
static boolean	isBidirectional(RelationType type)
static boolean	isRelationMultiValued(RelationType type)
static boolean	isRelationSingleValued(RelationType type)
static RelationType	valueOf(String name) Returns the enum constant of this type with the specified name.
static RelationType[]	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

NONE

public static final RelationType NONE

ONE_TO_ONE_UNI

public static final RelationType ONE_TO_ONE_UNI

ONE_TO_ONE_BI

public static final RelationType ONE_TO_ONE_BI

ONE_TO_MANY_UNI

public static final RelationType ONE_TO_MANY_UNI

ONE_TO_MANY_BI

public static final RelationType ONE_TO_MANY_BI

MANY_TO_MANY_BI

public static final RelationType MANY_TO_MANY_BI

MANY_TO_ONE_BI

public static final RelationType MANY_TO_ONE_BI

MANY_TO_ONE_UNI

public static final RelationType MANY_TO_ONE_UNI

Method Detail

values

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

Returns:

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

valueOf

public static RelationType 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

isRelationSingleValued

public static boolean isRelationSingleValued(RelationType type)

isRelationMultiValued

public static boolean isRelationMultiValued(RelationType type)

isBidirectional

public static boolean isBidirectional(RelationType type)