net.sf.saxon.expr.sort
Class NumericComparer11

java.lang.Object
  extended by net.sf.saxon.expr.sort.NumericComparer
      extended by net.sf.saxon.expr.sort.NumericComparer11
All Implemented Interfaces:
Serializable, AtomicComparer

public class NumericComparer11
extends NumericComparer

A Comparer used for comparing sort keys when data-type="number". The items to be compared are converted to numbers, and the numbers are then compared directly. NaN values compare equal to each other, and equal to an empty sequence, but less than anything else.

This class is used in XSLT only, so there is no need to handle XQuery's "empty least" vs "empty greatest" options.

Author:
Michael H. Kay
See Also:
Serialized Form

Field Summary
 
Fields inherited from class net.sf.saxon.expr.sort.NumericComparer
converter
 
Constructor Summary
protected NumericComparer11()
           
 
Method Summary
static NumericComparer getInstance()
           
 
Methods inherited from class net.sf.saxon.expr.sort.NumericComparer
compareAtomicValues, comparesEqual, getCollator, getComparisonKey, provideContext
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

NumericComparer11

protected NumericComparer11()
Method Detail

getInstance

public static NumericComparer getInstance()


Copyright (c) 2004-2011 Saxonica Limited. All rights reserved.