public class CollatingAtomicComparer extends java.lang.Object implements AtomicComparer
Constructor and Description |
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CollatingAtomicComparer(java.util.Comparator collator,
Platform platform)
Create an GenericAtomicComparer
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Modifier and Type | Method and Description |
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int |
compare(java.lang.Object a,
java.lang.Object b)
Compare two AtomicValue objects according to the rules for their data type.
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boolean |
comparesEqual(AtomicValue a,
AtomicValue b)
Compare two AtomicValue objects for equality according to the rules for their data type.
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ComparisonKey |
getComparisonKey(AtomicValue a)
Get a comparison key for an object.
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public CollatingAtomicComparer(java.util.Comparator collator, Platform platform)
collator
- the collation to be usedplatform
- used to obtain collation keys.public int compare(java.lang.Object a, java.lang.Object b)
compare
in interface java.util.Comparator
compare
in interface AtomicComparer
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.java.lang.ClassCastException
- if the objects are not comparablepublic boolean comparesEqual(AtomicValue a, AtomicValue b)
comparesEqual
in interface AtomicComparer
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.java.lang.ClassCastException
- if the objects are not comparablepublic ComparisonKey getComparisonKey(AtomicValue a)
getComparisonKey
in interface AtomicComparer