org.eclipse.persistence.internal.jpa.querydef

Class ExpressionImpl<X>

java.lang.Object

org.eclipse.persistence.internal.jpa.querydef.SelectionImpl<X>

org.eclipse.persistence.internal.jpa.querydef.ExpressionImpl<X>

All Implemented Interfaces:

java.io.Serializable, javax.persistence.criteria.Expression<X>, javax.persistence.criteria.Selection<X>, javax.persistence.TupleElement<X>, InternalExpression, InternalSelection

Direct Known Subclasses:

FunctionExpressionImpl, ParameterExpressionImpl, PathImpl

public class ExpressionImpl<X>
extends SelectionImpl<X>
implements javax.persistence.criteria.Expression<X>, InternalExpression

Purpose: Represents an Expression in the Criteria API heirarchy.

Description: Expressions are expression nodes that can not be joined from and may or not be the result of a Path expression.

Since:

EclipseLink 1.2

Author:

gyorke

See Also:

Expression, Serialized Form

Constructor Summary

Constructors

Constructor and Description
ExpressionImpl(javax.persistence.metamodel.Metamodel metamodel, java.lang.Class<X> javaType, Expression expressionNode, java.lang.Object value)

Method Summary

Modifier and Type	Method and Description
<T> javax.persistence.criteria.Expression<T>	as(java.lang.Class<T> type)
void	findRootAndParameters(CommonAbstractCriteriaImpl criteriaQuery)
javax.persistence.criteria.Predicate	in(java.util.Collection<?> values) Apply a predicate to test whether the expression is a member of the collection.
javax.persistence.criteria.Predicate	in(javax.persistence.criteria.Expression<?>... values) Apply a predicate to test whether the expression is a member of the argument list.
javax.persistence.criteria.Predicate	in(javax.persistence.criteria.Expression<java.util.Collection<?>> values) Apply a predicate to test whether the expression is a member of the collection.
javax.persistence.criteria.Predicate	in(java.lang.Object... values)
boolean	isCompoundExpression()
boolean	isExpression()
boolean	isJunction()
boolean	isLiteral()
javax.persistence.criteria.Predicate	isNotNull()
javax.persistence.criteria.Predicate	isNull()
boolean	isParameter()
boolean	isPredicate()
boolean	isSubquery()

Methods inherited from class org.eclipse.persistence.internal.jpa.querydef.SelectionImpl

alias, getAlias, getCompoundSelectionItems, getCurrentNode, getJavaType, isCompoundSelection, isConstructor, isFrom, isRoot

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.persistence.criteria.Selection

alias, getCompoundSelectionItems, isCompoundSelection

Methods inherited from interface javax.persistence.TupleElement

getAlias, getJavaType

Constructor Detail

ExpressionImpl

public ExpressionImpl(javax.persistence.metamodel.Metamodel metamodel,
                      java.lang.Class<X> javaType,
                      Expression expressionNode,
                      java.lang.Object value)

Method Detail

as

public <T> javax.persistence.criteria.Expression<T> as(java.lang.Class<T> type)

Specified by:

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

in

public javax.persistence.criteria.Predicate in(java.lang.Object... values)

Specified by:

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

in

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

Apply a predicate to test whether the expression is a member of the argument list.

Specified by:

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

Parameters:

values -

Returns:

predicate testing for membership

in

public javax.persistence.criteria.Predicate in(java.util.Collection<?> values)

Apply a predicate to test whether the expression is a member of the collection.

Specified by:

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

Parameters:

values - collection

Returns:

predicate testing for membership

in

public javax.persistence.criteria.Predicate in(javax.persistence.criteria.Expression<java.util.Collection<?>> values)

Apply a predicate to test whether the expression is a member of the collection.

Specified by:

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

Parameters:

values - expression corresponding to collection

Returns:

predicate testing for membership

isNotNull

public javax.persistence.criteria.Predicate isNotNull()

Specified by:

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

isNull

public javax.persistence.criteria.Predicate isNull()

Specified by:

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

isPredicate

public boolean isPredicate()

Specified by:

isPredicate in interface InternalExpression

isSubquery

public boolean isSubquery()

Specified by:

isSubquery in interface InternalExpression

isCompoundExpression

public boolean isCompoundExpression()

Specified by:

isCompoundExpression in interface InternalExpression

isExpression

public boolean isExpression()

Specified by:

isExpression in interface InternalExpression

isJunction

public boolean isJunction()

Specified by:

isJunction in interface InternalExpression

isLiteral

public boolean isLiteral()

Specified by:

isLiteral in interface InternalExpression

isParameter

public boolean isParameter()

Specified by:

isParameter in interface InternalExpression

findRootAndParameters

public void findRootAndParameters(CommonAbstractCriteriaImpl criteriaQuery)

Specified by:

findRootAndParameters in interface InternalSelection