Module org.eclipse.persistence.jpa

Package 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:

Expression<X>, Selection<X>, TupleElement<X>, Serializable, 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

See Also:

• Predicate
• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected List	expressions
protected String	operator

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

isLiteral, literal, metamodel

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

alias, currentNode, javaType

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	FunctionExpressionImpl(Metamodel metamodel, Class<X> resultClass, Expression expressionNode, List<Expression<?>> compoundExpressions)
	FunctionExpressionImpl(Metamodel metamodel, Class<X> resultClass, Expression expressionNode, List<Expression<?>> compoundExpressions, String operator)

Method Summary

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

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

as, buildExpressionForAs, 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, setJavaType

Methods inherited from class java.lang.Object

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

Methods inherited from interface jakarta.persistence.criteria.Selection

alias, getCompoundSelectionItems, isCompoundSelection

Methods inherited from interface jakarta.persistence.TupleElement

getAlias, getJavaType

Field Details

operator

protected String operator

expressions

protected List expressions

Constructor Details

FunctionExpressionImpl

protected FunctionExpressionImpl(Metamodel metamodel,
 Class<X> resultClass,
 Expression expressionNode,
 List<Expression<?>> compoundExpressions)

FunctionExpressionImpl

public FunctionExpressionImpl(Metamodel metamodel,
 Class<X> resultClass,
 Expression expressionNode,
 List<Expression<?>> compoundExpressions,
 String operator)

Method Details

getChildExpressions

public List<Expression<?>> getChildExpressions()

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

Returns:

list boolean expressions forming the predicate

getOperation

public 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>