org.eclipse.persistence.internal.jpa.querydef

Class FunctionExpressionImpl<X>

java.lang.Object

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

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

org.eclipse.persistence.internal.jpa.querydef.FunctionExpressionImpl<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:

CompoundExpressionImpl, CriteriaBuilderImpl.CaseImpl, CriteriaBuilderImpl.CoalesceImpl, CriteriaBuilderImpl.SimpleCaseImpl

public class FunctionExpressionImpl<X>
extends ExpressionImpl<X>

Purpose: Contains the implementation of the Predicate interface of the JPA criteria API.

Description: The predicate forms the least specific expression node. Predicates result in boolean expressions that are combined to form the final expression.

Since:

EclipseLink 1.2

Author:

gyorke

See Also:

Predicate, Serialized Form

Constructor Summary

Constructors

Constructor and Description
FunctionExpressionImpl(javax.persistence.metamodel.Metamodel metamodel, java.lang.Class<X> resultClass, Expression expressionNode, java.util.List<javax.persistence.criteria.Expression<?>> compoundExpressions, java.lang.String operator)

Method Summary

Modifier and Type	Method and Description
void	findRootAndParameters(CommonAbstractCriteriaImpl query)
java.util.List<javax.persistence.criteria.Expression<?>>	getChildExpressions() Return the top-level conjuncts or disjuncts of the predicate.
java.lang.String	getOperation()
boolean	isCompoundExpression()
boolean	isExpression()

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

as, in, in, in, in, isJunction, isLiteral, isNotNull, isNull, isParameter, isPredicate, 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

FunctionExpressionImpl

public FunctionExpressionImpl(javax.persistence.metamodel.Metamodel metamodel,
                              java.lang.Class<X> resultClass,
                              Expression expressionNode,
                              java.util.List<javax.persistence.criteria.Expression<?>> compoundExpressions,
                              java.lang.String operator)

Method Detail

getChildExpressions

public java.util.List<javax.persistence.criteria.Expression<?>> getChildExpressions()

Return the top-level conjuncts or disjuncts of the predicate.

Returns:

list boolean expressions forming the predicate

getOperation

public java.lang.String getOperation()

Returns:

the operator

isCompoundExpression

public boolean isCompoundExpression()

Specified by:

isCompoundExpression in interface InternalExpression

Overrides:

isCompoundExpression in class ExpressionImpl<X>

isExpression

public boolean isExpression()

Specified by:

isExpression in interface InternalExpression

Overrides:

isExpression in class ExpressionImpl<X>

findRootAndParameters

public void findRootAndParameters(CommonAbstractCriteriaImpl query)

Specified by:

findRootAndParameters in interface InternalSelection

Overrides:

findRootAndParameters in class ExpressionImpl<X>