| java.lang.Object
 net.sf.saxon.sort.AtomicSortComparer
| AtomicSortComparer | | public class AtomicSortComparer implements Comparator,java.io.Serializable(Code) | | A Comparator used for comparing atomic values of arbitrary item types. It encapsulates
a Collator that is used when the values to be compared are strings. It also supports
a separate method for testing equality of items, which can be used for data types that
are not ordered.
The AtomicSortComparer is identical to the AtomicComparer except for its handling
of NaN: it treats NaN values as lower than any other value, and NaNs as equal to
each other.
author:
Michael H. Kay |
| Inner Class :public static class ComparisonKey | |
| compare | | public int compare(Object a, Object b)(Code) | | Compare two AtomicValue objects according to the rules for their data type. UntypedAtomic
values are compared as if they were strings; if different semantics are wanted, the conversion
must be done by the caller.
Parameters:
a - the first object to be compared. It is intended that this should be an instanceof AtomicValue, though this restriction is not enforced. If it is a StringValue, thecollator is used to compare the values, otherwise the value must implement the java.util.Comparableinterface.
Parameters:
b - the second object to be compared. This must be comparable with the first object: forexample, if one is a string, they must both be strings. <0 if a0 if a>b
throws:
ClassCastException - if the objects are not comparable |
| getComparisonKey | | public ComparisonKey getComparisonKey(AtomicValue a)(Code) | | Get a comparison key for an object. This must satisfy the rule that if two objects are equal,
then their comparison keys are equal, and vice versa. There is no requirement that the
comparison keys should reflect the ordering of the underlying objects.
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