org.springframework.data.relational.domain

Class Identifier

java.lang.Object

org.springframework.data.relational.domain.Identifier

public final class Identifier
extends Object

Identifier represents a composite id of an entity that may be composed of one or many parts. Parts or all of the entity might not have a representation as a property in the entity but might only be derived from other entities referencing it.

Since:

1.1

Author:

Jens Schauder, Mark Paluch

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Identifier.IdentifierConsumer Represents an operation that accepts identifier key parts (name, value and target type) defining a contract to consume Identifier values.

Method Summary

Modifier and Type	Method and Description
static Identifier	empty() Returns an empty Identifier.
boolean	equals(Object o)
void	forEach(Identifier.IdentifierConsumer consumer) Performs the given action for each element of the Identifier until all elements have been processed or the action throws an exception.
static Identifier	from(Map<SqlIdentifier,Object> map) Creates an Identifier from a Map of name to value tuples.
Collection<org.springframework.data.relational.domain.Identifier.SingleIdentifierValue>	getParts()
int	hashCode()
static Identifier	of(SqlIdentifier name, Object value, Class<?> targetType) Creates an Identifier from name, value, and a target type.
int	size() Returns the number of key parts in this collection.
Map<SqlIdentifier,Object>	toMap() Returns a Map containing the identifier name to value tuples.
String	toString()
Identifier	withPart(SqlIdentifier name, Object value, Class<?> targetType) Creates a new Identifier from the current instance and sets the value for key.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

empty

public static Identifier empty()

Returns an empty Identifier.

Returns:

an empty Identifier.

of

public static Identifier of(SqlIdentifier name,
                            Object value,
                            Class<?> targetType)

Creates an Identifier from name, value, and a target type.

Parameters:

name - must not be null or empty.

value -

targetType - must not be null.

Returns:

the Identifier for name, value, and a target type.

from

public static Identifier from(Map<SqlIdentifier,Object> map)

Creates an Identifier from a Map of name to value tuples.

Parameters:

map - must not be null.

Returns:

the Identifier from a Map of name to value tuples.

withPart

public Identifier withPart(SqlIdentifier name,
                           Object value,
                           Class<?> targetType)

Creates a new Identifier from the current instance and sets the value for key. Existing key definitions for name are overwritten if they already exist.

Parameters:

name - must not be null or empty.

value -

targetType - must not be null.

Returns:

the Identifier containing all existing keys and the key part for name, value, and a target type.

toMap

public Map<SqlIdentifier,Object> toMap()

Returns a Map containing the identifier name to value tuples.

Returns:

a Map containing the identifier name to value tuples.

getParts

public Collection<org.springframework.data.relational.domain.Identifier.SingleIdentifierValue> getParts()

Returns:

the key parts.

forEach

public void forEach(Identifier.IdentifierConsumer consumer)

Performs the given action for each element of the Identifier until all elements have been processed or the action throws an exception. Unless otherwise specified by the implementing class, actions are performed in the order of iteration (if an iteration order is specified). Exceptions thrown by the action are relayed to the caller.

Parameters:

consumer - the action, must not be null.

size

public int size()

Returns the number of key parts in this collection.

Returns:

the number of key parts in this collection.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object