| java.lang.Object
 net.sf.saxon.sort.AtomicComparer
| AtomicComparer | | public class AtomicComparer 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.
author:
Michael H. Kay |
| AtomicComparer | | public AtomicComparer(Comparator collator, XPathContext conversion)(Code) | | Create an AtomicComparer
Parameters:
collator - the collation to be used
Parameters:
conversion - a context, used when converting untyped atomic values to the target type. |
| 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 |
| comparesEqual | | public boolean comparesEqual(Object a, Object b)(Code) | | 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.
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 equals() method.
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 Object getComparisonKey(Object 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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