com.haulmont.cuba.core.entity

Class IdProxy<T extends java.lang.Number>

java.lang.Object

java.lang.Number

com.haulmont.cuba.core.entity.IdProxy<T>

All Implemented Interfaces:

java.io.Serializable

public class IdProxy<T extends java.lang.Number>
extends java.lang.Number
implements java.io.Serializable

Class that is used as an entity ID when an actual identifier value is not available until the object is persisted to the database.

If you need to create a proxy for an existing ID, use of(Number) method.

See Also:

BaseDbGeneratedIdEntity, BaseIdentityIdEntity, Serialized Form

Method Summary

Modifier and Type	Method and Description
IdProxy<T>	copy() Returns a shared copy of this IdProxy cleaned from a reference to entity.
IdProxy<T>	copy(boolean shared) Returns a copy of this IdProxy cleaned from a reference to entity.
double	doubleValue()
boolean	equals(java.lang.Object other)
float	floatValue()
T	get()
T	getNN()
java.util.UUID	getUuid() INTERNAL
int	hashCode()
int	intValue()
long	longValue()
static <T extends java.lang.Number> IdProxy<T>	of(T value) Create proxy for the specified ID value.
static <T extends java.lang.Number> IdProxy<T>	of(T value, java.util.UUID uuid) Create proxy for the specified ID and UUID values.
void	setUuid(java.util.UUID uuid) INTERNAL
java.lang.String	toString()

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

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

Method Detail

of

public static <T extends java.lang.Number> IdProxy<T> of(T value)

Create proxy for the specified ID value. You might need it for providing ID to the EntityManager.find() method.

If you have stored a HasUuid entity in a hashtable using its ID as a key, use of(Number, UUID) method to construct the key when accessing the collection.

Parameters:

value - real ID value

of

public static <T extends java.lang.Number> IdProxy<T> of(T value,
                                                         java.util.UUID uuid)

Create proxy for the specified ID and UUID values. You might need it for finding HasUuid entities stored in hashtables by ID.

Parameters:

value - real ID value

uuid - entity's UUID

copy

public IdProxy<T> copy()

Returns a shared copy of this IdProxy cleaned from a reference to entity.

DO NOT use shared copies when assigning the same ID to another entity!

See Also:

copy(boolean)

copy

public IdProxy<T> copy(boolean shared)

Returns a copy of this IdProxy cleaned from a reference to entity.

Parameters:

shared - if true, a shared instance of the copy will be returned to avoid creating new object. DO NOT use shared copies when assigning the same ID to another entity!

get

@Nullable
public T get()

Returns:

real ID value or null if it is not assigned yet

getNN

public T getNN()

Returns:

real ID value

Throws:

java.lang.IllegalStateException - if it is not assigned yet

getUuid

public java.util.UUID getUuid()

INTERNAL

setUuid

public void setUuid(java.util.UUID uuid)

INTERNAL

intValue

public int intValue()

Specified by:

intValue in class java.lang.Number

longValue

public long longValue()

Specified by:

longValue in class java.lang.Number

floatValue

public float floatValue()

Specified by:

floatValue in class java.lang.Number

doubleValue

public double doubleValue()

Specified by:

doubleValue in class java.lang.Number

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object