Module org.eclipse.persistence.jpa

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

Class OrderImpl

java.lang.Object

org.eclipse.persistence.internal.jpa.querydef.OrderImpl

All Implemented Interfaces:

Order, Serializable

public class OrderImpl
extends Object
implements Order, Serializable

An object that defines an ordering over the query results.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected Expression	expression
protected boolean	isAscending
protected Nulls	nullPrecedence

Constructor Summary

Constructors

Constructor	Description
OrderImpl(Expression expression, boolean isAscending, Nulls nullPrecedence)	Creates an instance of ordering over the query results definition.

Method Summary

Modifier and Type	Method	Description
void	findRootAndParameters(CommonAbstractCriteriaImpl query)
Expression<?>	getExpression()
Nulls	getNullPrecedence()
boolean	isAscending()
Order	reverse()

Methods inherited from class java.lang.Object

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

Field Details

expression

protected Expression expression

isAscending

protected boolean isAscending

nullPrecedence

protected Nulls nullPrecedence

Constructor Details

OrderImpl

public OrderImpl(Expression expression,
 boolean isAscending,
 Nulls nullPrecedence)

Creates an instance of ordering over the query results definition.

Parameters:

expression - the query expression

isAscending - whether ascending ordering is in effect

nullPrecedence - the precedence of null values within query result sets

Method Details

getExpression

public Expression<?> getExpression()

Specified by:

getExpression in interface Order

isAscending

public boolean isAscending()

Specified by:

isAscending in interface Order

getNullPrecedence

public Nulls getNullPrecedence()

Specified by:

getNullPrecedence in interface Order

reverse

public Order reverse()

Specified by:

reverse in interface Order

findRootAndParameters

public void findRootAndParameters(CommonAbstractCriteriaImpl query)