net.sf.saxon.sort
Class TextComparer
java.lang.Object
net.sf.saxon.sort.TextComparer
- AtomicComparer, Serializable
public class TextComparer
extends java.lang.Object
A Comparer used for comparing sort keys when data-type="text". The items to be
compared are converted to strings, and the strings are then compared using an
underlying collator
comparesEqual
public boolean comparesEqual(AtomicValue a,
AtomicValue b)
throws NoDynamicContextException
Compare two AtomicValue objects for equality according to the rules for their data type. UntypedAtomic
values are compared by converting to the type of the other operand.
- comparesEqual in interface AtomicComparer
a
- the first object to be compared.b
- the second object to be compared.
- true if the values are equal, false if not
getBaseComparer
public AtomicComparer getBaseComparer()
Get the underlying comparer (which doesn't do conversion to string)
getComparisonKey
public ComparisonKey getComparisonKey(AtomicValue a)
throws NoDynamicContextException
Get a comparison key for an object. This must satisfy the rule that if two objects are equal
according to the XPath eq operator, then their comparison keys are equal according to the Java
equals() method, and vice versa. There is no requirement that the
comparison keys should reflect the ordering of the underlying objects.
- getComparisonKey in interface AtomicComparer
provideContext
public AtomicComparer provideContext(XPathContext context)
Supply the dynamic context in case this is needed for the comparison
- provideContext in interface AtomicComparer
context
- the dynamic evaluation context
- either the original AtomicComparer, or a new AtomicComparer in which the context
is known. The original AtomicComparer is not modified