org.datanucleus.api.jpa.criteria

Class ExpressionImpl<T>

java.lang.Object

org.datanucleus.api.jpa.criteria.ExpressionImpl<T>

All Implemented Interfaces:

Serializable, javax.persistence.criteria.Expression<T>, javax.persistence.criteria.Selection<T>, javax.persistence.TupleElement<T>

Direct Known Subclasses:

CoalesceImpl, CompoundSelectionImpl, ParameterExpressionImpl, PathImpl, PredicateImpl, SubqueryImpl

public class ExpressionImpl<T>
extends Object
implements javax.persistence.criteria.Selection<T>, javax.persistence.criteria.Expression<T>, Serializable

Implementation of JPA2 Criteria "Expression".

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ExpressionImpl(Class<T> cls)

Method Summary

Methods

Modifier and Type	Method and Description
javax.persistence.criteria.Selection<T>	alias(String alias)
<X> javax.persistence.criteria.Expression<X>	as(Class<X> cls)
String	getAlias()
List<javax.persistence.criteria.Selection<?>>	getCompoundSelectionItems()
Class<? extends T>	getJavaType()
org.datanucleus.query.expression.Expression	getQueryExpression() Accessor for the underlying (generic) query expression.
javax.persistence.criteria.Predicate	in(Collection<?> coll)
javax.persistence.criteria.Predicate	in(javax.persistence.criteria.Expression<?>... exprs)
javax.persistence.criteria.Predicate	in(javax.persistence.criteria.Expression<Collection<?>> collExpr)
javax.persistence.criteria.Predicate	in(Object... expr)
boolean	isCompoundSelection()
javax.persistence.criteria.Predicate	isNotNull()
javax.persistence.criteria.Predicate	isNull()
String	toString() Method to print out the expression as it would appear in JPQL single-string form.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionImpl

public ExpressionImpl(Class<T> cls)

Method Detail

as

public <X> javax.persistence.criteria.Expression<X> as(Class<X> cls)

Specified by:

as in interface javax.persistence.criteria.Expression<T>

in

public javax.persistence.criteria.Predicate in(Collection<?> coll)

Specified by:

in in interface javax.persistence.criteria.Expression<T>

in

public javax.persistence.criteria.Predicate in(javax.persistence.criteria.Expression<?>... exprs)

Specified by:

in in interface javax.persistence.criteria.Expression<T>

in

public javax.persistence.criteria.Predicate in(javax.persistence.criteria.Expression<Collection<?>> collExpr)

Specified by:

in in interface javax.persistence.criteria.Expression<T>

in

public javax.persistence.criteria.Predicate in(Object... expr)

Specified by:

in in interface javax.persistence.criteria.Expression<T>

isNotNull

public javax.persistence.criteria.Predicate isNotNull()

Specified by:

isNotNull in interface javax.persistence.criteria.Expression<T>

isNull

public javax.persistence.criteria.Predicate isNull()

Specified by:

isNull in interface javax.persistence.criteria.Expression<T>

alias

public javax.persistence.criteria.Selection<T> alias(String alias)

Specified by:

alias in interface javax.persistence.criteria.Selection<T>

getCompoundSelectionItems

public List<javax.persistence.criteria.Selection<?>> getCompoundSelectionItems()

Specified by:

getCompoundSelectionItems in interface javax.persistence.criteria.Selection<T>

isCompoundSelection

public boolean isCompoundSelection()

Specified by:

isCompoundSelection in interface javax.persistence.criteria.Selection<T>

getAlias

public String getAlias()

Specified by:

getAlias in interface javax.persistence.TupleElement<T>

getJavaType

public Class<? extends T> getJavaType()

Specified by:

getJavaType in interface javax.persistence.TupleElement<T>

getQueryExpression

public org.datanucleus.query.expression.Expression getQueryExpression()

Accessor for the underlying (generic) query expression.

Returns:

The query expression

toString

public String toString()

Method to print out the expression as it would appear in JPQL single-string form.

Overrides:

toString in class Object

Returns:

The JPQL single string form of this expression