org.eclipse.persistence.internal.jpa.querydef

Class PredicateImpl

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<java.lang.Boolean>

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

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

All Implemented Interfaces:

java.io.Serializable, javax.persistence.criteria.Expression<java.lang.Boolean>, javax.persistence.criteria.Predicate, javax.persistence.criteria.Selection<java.lang.Boolean>, javax.persistence.TupleElement<java.lang.Boolean>, InternalExpression, InternalSelection

public class PredicateImpl
extends CompoundExpressionImpl
implements javax.persistence.criteria.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

Author:

gyorke

See Also:

Predicate, Serialized Form

Nested Class Summary

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

javax.persistence.criteria.Predicate.BooleanOperator

Constructor Summary

Constructors

Constructor and Description
PredicateImpl(javax.persistence.metamodel.Metamodel metamodel, Expression expressionNode, java.util.List<javax.persistence.criteria.Expression<?>> parentExpressions, javax.persistence.criteria.Predicate.BooleanOperator operator)

Method Summary

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

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

isExpression, isNegated, isPredicate, 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, 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

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.persistence.criteria.Predicate

isNegated

Methods inherited from interface javax.persistence.criteria.Expression

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

Methods inherited from interface javax.persistence.criteria.Selection

alias, getCompoundSelectionItems, isCompoundSelection

Methods inherited from interface javax.persistence.TupleElement

getAlias, getJavaType

Constructor Detail

PredicateImpl

public PredicateImpl(javax.persistence.metamodel.Metamodel metamodel,
                     Expression expressionNode,
                     java.util.List<javax.persistence.criteria.Expression<?>> parentExpressions,
                     javax.persistence.criteria.Predicate.BooleanOperator operator)

Method Detail

getJunctionValue

public java.lang.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 javax.persistence.criteria.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 javax.persistence.criteria.Predicate

Overrides:

getOperator in class CompoundExpressionImpl

Returns:

boolean operator for the predicate

getExpressions

public java.util.List<javax.persistence.criteria.Expression<java.lang.Boolean>> getExpressions()

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

Specified by:

getExpressions in interface javax.persistence.criteria.Predicate

Overrides:

getExpressions in class CompoundExpressionImpl

Returns:

list boolean expressions forming the predicate

not

public javax.persistence.criteria.Predicate not()

Apply negation to the predicate.

Specified by:

not in interface javax.persistence.criteria.Predicate

Overrides:

not in class CompoundExpressionImpl

Returns:

the negated predicate

setOperator

public void setOperator(javax.persistence.criteria.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<java.lang.Boolean>

isCompoundExpression

public boolean isCompoundExpression()

Specified by:

isCompoundExpression in interface InternalExpression

Overrides:

isCompoundExpression in class CompoundExpressionImpl