JPA Interface

Coalesce

Super Interfaces:
Expression<T>, Selection<T>, TupleElement<T>
Interface used to build coalesce expressions. A coalesce expression is equivalent to a case expression that returns null if all its arguments evaluate to null, and the value of its first non-null argument otherwise.
Since:
JPA 2.0

Public Methods

Expression<X> as(Class<X> type)
Perform a typecast upon the expression, returning a new expression object.
Unlike cast(), this method does not cause type conversion: the runtime type is not changed.

Warning: may result in a runtime failure.

Parameters:
type - intended type of the expression
Return:
new expression of the given type
Inherited from:
Expression<T>
See Also:
cast()
Since:
JPA 2.0
Expression<X> cast(Class<X> type)
Cast this expression to the specified type, returning a new expression object.
Unlike as(), this method does result in a runtime type conversion.

Providers are required to support casting scalar expressions to String, and String expressions to Integer, Long, Float, and Double. Support for typecasts between other basic types is not required.

Parameters:
type - a basic type
Return:
a scalar expression of the given basic type
Inherited from:
Expression<T>
Since:
JPA 3.2
Predicate equalTo(Expression<?> value)
Create a predicate to test whether the expression is equal to the argument.
Parameters:
value - expression to be tested against
Return:
predicate testing for equality
Inherited from:
Expression<T>
Since:
JPA 3.2
Predicate equalTo(Object value)
Create a predicate to test whether the expression is equal to the argument.
Parameters:
value - value to be tested against
Return:
predicate testing for equality
Inherited from:
Expression<T>
Since:
JPA 3.2
Predicate in(Collection<?> values)
Create a predicate to test whether the expression is a member of the collection.
Parameters:
values - collection of values to be tested against
Return:
predicate testing for membership
Inherited from:
Expression<T>
Since:
JPA 2.0
Predicate in(Expression<?>... values)
Create a predicate to test whether the expression is a member of the argument list.
Parameters:
values - expressions to be tested against
Return:
predicate testing for membership
Inherited from:
Expression<T>
Since:
JPA 2.0
Predicate in(Expression<Collection<?>> values)
Create a predicate to test whether the expression is a member of the collection.
Parameters:
values - expression corresponding to collection to be tested against
Return:
predicate testing for membership
Inherited from:
Expression<T>
Since:
JPA 2.0
Predicate in(Object... values)
Create a predicate to test whether the expression is a member of the argument list.
Parameters:
values - values to be tested against
Return:
predicate testing for membership
Inherited from:
Expression<T>
Since:
JPA 2.0
Predicate isNotNull()
Create a predicate to test whether the expression is not null.
Return:
predicate testing whether the expression is not null
Inherited from:
Expression<T>
Since:
JPA 2.0
Predicate isNull()
Create a predicate to test whether the expression is null.
Return:
predicate testing whether the expression is null
Inherited from:
Expression<T>
Since:
JPA 2.0
Predicate notEqualTo(Expression<?> value)
Create a predicate to test whether the expression is unequal to the argument.
Parameters:
value - expression to be tested against
Return:
predicate testing for inequality
Inherited from:
Expression<T>
Since:
JPA 3.2
Predicate notEqualTo(Object value)
Create a predicate to test whether the expression is unequal to the argument.
Parameters:
value - value to be tested against
Return:
predicate testing for inequality
Inherited from:
Expression<T>
Since:
JPA 3.2
CriteriaBuilder.Coalesce<T> value(Expression<?extendsT> value)
Add an argument to the coalesce expression.
Parameters:
value - expression
Return:
coalesce expression
Since:
JPA 2.0
CriteriaBuilder.Coalesce<T> value(T value)
Add an argument to the coalesce expression.
Parameters:
value - value
Return:
coalesce expression
Since:
JPA 2.0