net.sf.saxon.expr.sort

Interface EqualityMatcher<T>

Type Parameters:

T - the type of objects to be compared for equality

All Known Implementing Classes:

SimpleTypeComparison, SimpleTypeIdentityComparison

public interface EqualityMatcher<T>

Interface representing objects used to perform equality matching. This is used in preference to wrapping the objects in a wrapper with its own equals() and hashCode() methods, to avoid the overhead of wrapper objects in a large data structure

Method Summary

Modifier and Type	Method and Description
boolean	equal(T a, T b) Compare two objects for equality
int	hash(T a) Compute a hash code for an object

Method Detail

equal

boolean equal(T a,
              T b)

Compare two objects for equality

Parameters:

a - one object

b - another object

Returns:

true if the two objects are deemed equal

hash

int hash(T a)

Compute a hash code for an object

Parameters:

a - an object

Returns:

a hash code, which has the property that if two objects are equal, then they must have the same hash code