com.espertech.esper.epl.spec
Class OrderByItem

java.lang.Object
  com.espertech.esper.epl.spec.OrderByItem

All Implemented Interfaces:

MetaDefItem, java.io.Serializable

public class OrderByItem
extends java.lang.Object
implements MetaDefItem, java.io.Serializable

Specification object to an element in the order-by expression.

See Also:

Serialized Form

Field Summary

static OrderByItem[]

EMPTY_ORDERBY_ARRAY

Constructor Summary

OrderByItem(ExprNode exprNode, boolean ascending)
Ctor.

Method Summary

OrderByItem	copy()
ExprNode	getExprNode() Returns the order-by expression node.
boolean	isDescending() Returns true for ascending, false for descending.
static OrderByItem[]	toArray(java.util.Collection<OrderByItem> expressions)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_ORDERBY_ARRAY

public static final OrderByItem[] EMPTY_ORDERBY_ARRAY

Constructor Detail

OrderByItem

public OrderByItem(ExprNode exprNode,
                   boolean ascending)

Ctor.

Parameters:

exprNode - is the order-by expression node

ascending - is true for ascending, or false for descending sort

Method Detail

getExprNode

public ExprNode getExprNode()

Returns the order-by expression node.

Returns:

expression node.

isDescending

public boolean isDescending()

Returns true for ascending, false for descending.

Returns:

indicator if ascending or descending

copy

public OrderByItem copy()

toArray

public static OrderByItem[] toArray(java.util.Collection<OrderByItem> expressions)