Package de.lmu.ifi.dbs.elki.utilities.pairs

Pairs and triples utility classes.

See:
Description

Class Summary

CPair<FIRST extends Comparable<FIRST>,SECOND extends Comparable<SECOND>>	Pair with canonical comparison function derived from generics.
CPair.CompareSwapped<FIRST extends Comparable<FIRST>,SECOND extends Comparable<SECOND>>	Class to do a canonical swapped comparison on this class.
CTriple<FIRST extends Comparable<FIRST>,SECOND extends Comparable<SECOND>,THIRD extends Comparable<THIRD>>	Triple with canonical comparison function.
DoubleDoublePair	Pair storing two doubles.
DoubleIntPair	Pair storing an integer and a double.
FCPair<FIRST extends Comparable<FIRST>,SECOND>	Pair that can only be compared by it's first component.
IntDoublePair	Pair storing an integer and a double.
IntIntPair	Pair storing two integers.
Pair<FIRST,SECOND>	Generic SimplePair class.
Pair.Compare<FIRST,SECOND>	Compare two SimplePairs based on two comparators
Pair.CompareByFirst<FIRST,SECOND>	Compare two SimplePairs based on a comparator for the first component.
Pair.CompareBySecond<FIRST,SECOND>	Compare two SimplePairs based on a comparator for the second component.
Pair.CompareSwapped<FIRST,SECOND>	Compare two SimplePairs based on two comparators, but by second component first.
Triple<FIRST,SECOND,THIRD>	Triple without comparison.

Package de.lmu.ifi.dbs.elki.utilities.pairs Description

Pairs and triples utility classes.

Pairs and Triples are frequently used classes and reimplemented too often.

• Pair is the generic non-comparable pair.
• FCPair is the generic pair comparable in the first component only.
• FCPair is the pair comparable in both components.

Due to limitations in object subclassing, CPair cannot be a subclass of FCPair, since a class cannot implement the Comparable interface twice.

Also primitive types cannot be used in Generics, resulting in the following classes for primitive types:

• IntIntPair storing two int values
• DoubleIntPair storing one double and one int value.
• IntDoublePair storing one int and one double value.
• DoubleDoublePair storing two double values

Triples can be used via:

• Triple is the generic non-comparable triple.
• CTriple is the triple comparable in all components.

If you need a triple comparable in just particular components, either define a comparator for sorting or subclass Triple appropriately.