Package net.sf.saxon.sort
Class EmptyGreatestComparer
java.lang.Object
net.sf.saxon.sort.EmptyGreatestComparer
- All Implemented Interfaces:
Serializable
,Comparator
A Comparer that modifies a base comparer by sorting empty key values and NaN values last (greatest),
as opposed to the default which sorts them first.
- Author:
- Michael H. Kay
- See Also:
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Constructor Summary
Constructors -
Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface java.util.Comparator
equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong
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Constructor Details
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EmptyGreatestComparer
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Method Details
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compare
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.- Specified by:
compare
in interfaceComparator
- Parameters:
a
- the first object to be compared. It is intended that this should normally be an instance of AtomicValue, though this restriction is not enforced. If it is a StringValue, the collator is used to compare the values, otherwise the value must implement the java.util.Comparable interface.b
- the second object to be compared. This must be comparable with the first object: for example, if one is a string, they must both be strings.- Returns:
- invalid input: '<'0 if ainvalid input: '<'b, 0 if a=b, >0 if a>b
- Throws:
ClassCastException
- if the objects are not comparable
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