org.eclipse.persistence.internal.jpa.querydef

Class CompoundExpressionImpl

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

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

Direct Known Subclasses:

InImpl, PredicateImpl

public class CompoundExpressionImpl
extends FunctionExpressionImpl<java.lang.Boolean>
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
CompoundExpressionImpl(javax.persistence.metamodel.Metamodel metamodel, Expression expressionNode, java.util.List<javax.persistence.criteria.Expression<?>> compoundExpressions)
CompoundExpressionImpl(javax.persistence.metamodel.Metamodel metamodel, Expression expressionNode, java.util.List<javax.persistence.criteria.Expression<?>> compoundExpressions, java.lang.String operator)

Method Summary

Modifier and Type	Method and Description
java.util.List<javax.persistence.criteria.Expression<java.lang.Boolean>>	getExpressions()
javax.persistence.criteria.Predicate.BooleanOperator	getOperator() Return the boolean operator for the predicate.
boolean	isCompoundExpression()
boolean	isExpression()
boolean	isNegated() Has negation been applied to the predicate.
boolean	isPredicate()
javax.persistence.criteria.Predicate	not() Apply negation to the predicate.
void	setOperator(javax.persistence.criteria.Predicate.BooleanOperator operator)
void	setParentNode(Expression parentNode) This method is used to store what will be the parent EclipseLink expression in the case the tree needs to be altered.

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, isJunction, 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.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

CompoundExpressionImpl

public CompoundExpressionImpl(javax.persistence.metamodel.Metamodel metamodel,
                              Expression expressionNode,
                              java.util.List<javax.persistence.criteria.Expression<?>> compoundExpressions)

CompoundExpressionImpl

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

Method Detail

getOperator

public javax.persistence.criteria.Predicate.BooleanOperator getOperator()

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

Specified by:

getOperator in interface javax.persistence.criteria.Predicate

Returns:

boolean operator for the predicate

getExpressions

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

Specified by:

getExpressions in interface javax.persistence.criteria.Predicate

isCompoundExpression

public boolean isCompoundExpression()

Specified by:

isCompoundExpression in interface InternalExpression

Overrides:

isCompoundExpression in class FunctionExpressionImpl<java.lang.Boolean>

isExpression

public boolean isExpression()

Specified by:

isExpression in interface InternalExpression

Overrides:

isExpression in class FunctionExpressionImpl<java.lang.Boolean>

isNegated

public boolean isNegated()

Has negation been applied to the predicate.

Specified by:

isNegated in interface javax.persistence.criteria.Predicate

Returns:

boolean indicating if the predicate has been negated

not

public javax.persistence.criteria.Predicate not()

Apply negation to the predicate.

Specified by:

not in interface javax.persistence.criteria.Predicate

Returns:

the negated predicate

isPredicate

public boolean isPredicate()

Specified by:

isPredicate in interface InternalExpression

Overrides:

isPredicate in class ExpressionImpl<java.lang.Boolean>

setOperator

public void setOperator(javax.persistence.criteria.Predicate.BooleanOperator operator)

Parameters:

operator - the operator to set

setParentNode

public void setParentNode(Expression parentNode)

This method is used to store what will be the parent EclipseLink expression in the case the tree needs to be altered. Currently used for In.