org.springframework.data.jpa.domain

Class Specifications<T>

java.lang.Object

org.springframework.data.jpa.domain.Specifications<T>

All Implemented Interfaces:

Serializable, Specification<T>

public class Specifications<T>
extends Object
implements Specification<T>, Serializable

Helper class to easily combine Specification instances.

Author:

Oliver Gierke, Thomas Darimont

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
Specifications<T>	and(Specification<T> other) ANDs the given Specification to the current one.
static <T> Specifications<T>	not(Specification<T> spec) Negates the given Specification.
Specifications<T>	or(Specification<T> other) ORs the given specification to the current one.
javax.persistence.criteria.Predicate	toPredicate(javax.persistence.criteria.Root<T> root, javax.persistence.criteria.CriteriaQuery<?> query, javax.persistence.criteria.CriteriaBuilder builder) Creates a WHERE clause for a query of the referenced entity in form of a Predicate for the given Root and CriteriaQuery.
static <T> Specifications<T>	where(Specification<T> spec) Simple static factory method to add some syntactic sugar around a Specification.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

where

public static <T> Specifications<T> where(Specification<T> spec)

Simple static factory method to add some syntactic sugar around a Specification.

Type Parameters:

T -

Parameters:

spec - can be null.

Returns:

and

public Specifications<T> and(Specification<T> other)

ANDs the given Specification to the current one.

Type Parameters:

T -

Parameters:

other - can be null.

Returns:

or

public Specifications<T> or(Specification<T> other)

ORs the given specification to the current one.

Type Parameters:

T -

Parameters:

other - can be null.

Returns:

not

public static <T> Specifications<T> not(Specification<T> spec)

Negates the given Specification.

Type Parameters:

T -

Parameters:

spec - can be null.

Returns:

toPredicate

public javax.persistence.criteria.Predicate toPredicate(javax.persistence.criteria.Root<T> root,
                                                        javax.persistence.criteria.CriteriaQuery<?> query,
                                                        javax.persistence.criteria.CriteriaBuilder builder)

Description copied from interface: Specification

Creates a WHERE clause for a query of the referenced entity in form of a Predicate for the given Root and CriteriaQuery.

Specified by:

toPredicate in interface Specification<T>

Returns:

a Predicate, may be null.