net.sf.saxon.sort
public class AtomicComparer extends Object implements Comparator, Serializable
Constructor Summary | |
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AtomicComparer(Comparator collator, XPathContext conversion)
Create an AtomicComparer | |
AtomicComparer(Comparator collator, Configuration config) |
Method Summary | |
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int | compare(Object a, Object b)
Compare two AtomicValue objects according to the rules for their data type. |
boolean | comparesEqual(Object a, Object b)
Compare two AtomicValue objects for equality according to the rules for their data type. |
Object | getComparisonKey(Object a)
Get a comparison key for an object. |
Parameters: collator the collation to be used conversion a context, used when converting untyped atomic values to the target type.
Parameters: a the first object to be compared. It is intended that this should 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: <0 if a0 if a>b
Throws: ClassCastException if the objects are not comparable
Parameters: a the first object to be compared. It is intended that this should 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 equals() method. 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: <0 if a0 if a>b
Throws: ClassCastException if the objects are not comparable