Module org.eclipse.persistence.jpa

Package org.eclipse.persistence.internal.jpa.querydef

Class PredicateImpl

java.lang.Object

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

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

org.eclipse.persistence.internal.jpa.querydef.FunctionExpressionImpl<Boolean>

org.eclipse.persistence.internal.jpa.querydef.CompoundExpressionImpl

org.eclipse.persistence.internal.jpa.querydef.PredicateImpl

All Implemented Interfaces:

Expression<Boolean>, Predicate, Selection<Boolean>, TupleElement<Boolean>, Serializable, InternalExpression, InternalSelection

public class PredicateImpl
extends CompoundExpressionImpl
implements Predicate

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

Nested Class Summary

Nested classes/interfaces inherited from interface jakarta.persistence.criteria.Predicate

Predicate.BooleanOperator

Field Summary

Fields

Modifier and Type	Field	Description
protected Predicate.BooleanOperator	booloperator

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

isNegated

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

expressions, 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

Constructor	Description
PredicateImpl(Metamodel metamodel, Expression expressionNode, List<Expression<?>> parentExpressions, Predicate.BooleanOperator operator)

Method Summary

Modifier and Type	Method	Description
List<Expression<Boolean>>	getExpressions()	Return the top-level conjuncts or disjuncts of the predicate.
Boolean	getJunctionValue()	INTERNAL: This method returns null if this is not a conjunction/disjunction TRUE if this is a conjunction, FALSE for disjunction.
Predicate.BooleanOperator	getOperator()	Return the boolean operator for the predicate.
boolean	isCompoundExpression()
boolean	isJunction()
Predicate	not()	Apply negation to the predicate.
void	setOperator(Predicate.BooleanOperator operator)

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

isExpression, isNegated, isPredicate, setIsNegated, setParentNode

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

findRootAndParameters, getChildExpressions, getOperation

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

as, buildExpressionForAs, in, in, in, in, isLiteral, isNotNull, isNull, isParameter, 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.Expression

as, in, in, in, in, isNotNull, isNull

Methods inherited from interface jakarta.persistence.criteria.Predicate

isNegated

Methods inherited from interface jakarta.persistence.criteria.Selection

alias, getCompoundSelectionItems, isCompoundSelection

Methods inherited from interface jakarta.persistence.TupleElement

getAlias, getJavaType

Field Details

booloperator

protected Predicate.BooleanOperator booloperator

Constructor Details

PredicateImpl

public PredicateImpl(Metamodel metamodel,
 Expression expressionNode,
 List<Expression<?>> parentExpressions,
 Predicate.BooleanOperator operator)

Method Details

getJunctionValue

public Boolean getJunctionValue()

INTERNAL: This method returns null if this is not a conjunction/disjunction TRUE if this is a conjunction, FALSE for disjunction.

getOperator

public Predicate.BooleanOperator getOperator()

Description copied from class: CompoundExpressionImpl

Return the boolean operator for the predicate. If the predicate is simple, this is AND.

Specified by:

getOperator in interface Predicate

Overrides:

getOperator in class CompoundExpressionImpl

Returns:

boolean operator for the predicate

getExpressions

public List<Expression<Boolean>> getExpressions()

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

Specified by:

getExpressions in interface Predicate

Overrides:

getExpressions in class CompoundExpressionImpl

Returns:

list boolean expressions forming the predicate

not

public Predicate not()

Apply negation to the predicate.

Specified by:

not in interface Predicate

Overrides:

not in class CompoundExpressionImpl

Returns:

the negated predicate

setOperator

public void setOperator(Predicate.BooleanOperator operator)

Overrides:

setOperator in class CompoundExpressionImpl

Parameters:

operator - the operator to set

isJunction

public boolean isJunction()

Specified by:

isJunction in interface InternalExpression

Overrides:

isJunction in class ExpressionImpl<Boolean>

isCompoundExpression

public boolean isCompoundExpression()

Specified by:

isCompoundExpression in interface InternalExpression

Overrides:

isCompoundExpression in class CompoundExpressionImpl