com.saxonica.expr
Class EquivalenceComparer

java.lang.Object
  net.sf.saxon.expr.sort.AtomicSortComparer
      com.saxonica.expr.EquivalenceComparer

All Implemented Interfaces:

Serializable, AtomicComparer

public class EquivalenceComparer
extends AtomicSortComparer

A comparer that compares atomic values for equality, with the properties: - non-comparable types compare false - NaN compares equal to NaN

See Also:

Serialized Form

Field Summary

Fields inherited from class net.sf.saxon.expr.sort.AtomicSortComparer

COLLATION_KEY_NaN

Constructor Summary

protected

EquivalenceComparer(StringCollator collator, int itemType, XPathContext context)

Method Summary

protected int

compareNonComparables(AtomicValue a, AtomicValue b) Compare two values that are known to be non-comparable.

Methods inherited from class net.sf.saxon.expr.sort.AtomicSortComparer

compareAtomicValues, comparesEqual, getCollator, getComparisonKey, getItemType, getStringCollator, makeSortComparer, provideContext

Methods inherited from class java.lang.Object

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

Constructor Detail

EquivalenceComparer

protected EquivalenceComparer(StringCollator collator,
                              int itemType,
                              XPathContext context)

Method Detail

compareNonComparables

protected int compareNonComparables(AtomicValue a,
                                    AtomicValue b)

Compare two values that are known to be non-comparable. In the base class this method throws a ClassCastException. In this subclass it is overridden to return Value.INDETERMINATE_ORDERING

Overrides:

compareNonComparables in class AtomicSortComparer