javax.persistence.criteria.CriteriaBuilder.SimpleCase - JPA interface
javax.persistence.criteria
Interface CriteriaBuilder.SimpleCase<C,R>
- Superinterfaces:
-
Expression<R>
,Selection<R>
,TupleElement<R>
Interface used to build simple case expressions. Case conditions are evaluated in the order in which they are specified.
- Since:
- JPA 2.0
Selection<X>
alias(String name)
Assigns an alias to the selection item. Once assigned, an alias cannot be changed or reassigned. Returns the same selection item.
- Parameters:
-
name
- alias
- Returns:
- selection item
- Since:
- JPA 2.0
Expression<X>
as(Class<X> type)
Perform a typecast upon the expression, returning a new expression object. 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
- Returns:
- new expression of the given type
- Since:
- JPA 2.0
String
getAlias()
Return the alias assigned to the tuple element or null, if no alias has been assigned.
- Returns:
- alias
- Since:
- JPA 2.0
List<
Selection<?>>
getCompoundSelectionItems()
Return the selection items composing a compound selection. Modifications to the list do not affect the query.
- Returns:
- list of selection items
- Throws:
-
IllegalStateException
- if selection is not a compound selection
- Since:
- JPA 2.0
Return the expression to be tested against the conditions.
- Returns:
- expression
- Since:
- JPA 2.0
Class<?>
getJavaType()
Return the Java type of the tuple element.
- Returns:
- the Java type of the tuple element
- Since:
- JPA 2.0
Create a predicate to test whether the expression is a member of the argument list.
- Parameters:
-
values
- values to be tested against
- Returns:
- predicate testing for membership
- Since:
- JPA 2.0
Create a predicate to test whether the expression is a member of the collection.
- Parameters:
-
values
- collection of values to be tested against
- Returns:
- predicate testing for membership
- Since:
- JPA 2.0
Create a predicate to test whether the expression is a member of the collection.
- Parameters:
-
values
- expression corresponding to collection to be tested against
- Returns:
- predicate testing for membership
- Since:
- JPA 2.0
Create a predicate to test whether the expression is a member of the argument list.
- Parameters:
-
values
- expressions to be tested against
- Returns:
- predicate testing for membership
- Since:
- JPA 2.0
boolean
isCompoundSelection()
Whether the selection item is a compound selection.
- Returns:
- boolean indicating whether the selection is a compound selection
- Since:
- JPA 2.0
Create a predicate to test whether the expression is not null.
- Returns:
- predicate testing whether the expression is not null
- Since:
- JPA 2.0
Create a predicate to test whether the expression is null.
- Returns:
- predicate testing whether the expression is null
- Since:
- JPA 2.0
Expression<R>
otherwise(R result)
Add an "else" clause to the case expression.
- Parameters:
-
result
- "else" result
- Returns:
- expression
- Since:
- JPA 2.0
Add an "else" clause to the case expression.
- Parameters:
-
result
- "else" result expression
- Returns:
- expression
- Since:
- JPA 2.0
SimpleCase<C,R>
when(C condition, R result)
Add a when/then clause to the case expression.
- Parameters:
-
condition
- "when" condition -
result
- "then" result value
- Returns:
- simple case expression
- Since:
- JPA 2.0
Add a when/then clause to the case expression.
- Parameters:
-
condition
- "when" condition -
result
- "then" result expression
- Returns:
- simple case expression
- Since:
- JPA 2.0
This documentation page is derived (with some adjustments) from the open source JPA 2 RI (EclipseLink)
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
Object Relational Mapping (ORM) JPA 2 providers include Hibernate, EclipseLink, TopLink, OpenJPA and DataNucleus.
ObjectDB is not an ORM JPA implementation but an Object Database for Java with built in JPA 2 support.