Package elki.database.ids.integer

Class DoubleIntegerDBIDSubList

java.lang.Object

elki.database.ids.integer.DoubleIntegerDBIDSubList

All Implemented Interfaces:

DBIDs, DoubleDBIDList, DoubleIntegerDBIDList, IntegerDBIDs

public class DoubleIntegerDBIDSubList
extends java.lang.Object
implements DoubleIntegerDBIDList

Sublist of an existing result to contain only some of the elements.

Since:

0.6.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private class	DoubleIntegerDBIDSubList.Itr	Iterator for the sublist.

Nested classes/interfaces inherited from interface elki.database.ids.DoubleDBIDList

DoubleDBIDList.Consumer

Field Summary

Fields

Modifier and Type	Field	Description
private int	begin	Start offset.
private int	end	End offset.
private DoubleIntegerDBIDList	inner	Wrapped inner result.

Constructor Summary

Constructors

Constructor	Description
DoubleIntegerDBIDSubList(DoubleIntegerDBIDList inner, int begin, int end)	Constructor.

Method Summary

Modifier and Type	Method	Description
DBIDVar	assignVar(int index, DBIDVar var)	Assign a DBID variable the value of position index.
boolean	contains(DBIDRef o)	Test whether an ID is contained.
double	doubleValue(int index)	Get the double value at a given index (to access the DBID, either use DoubleDBIDList.iter() or DoubleDBIDList.assignVar(int, elki.database.ids.DBIDVar).
boolean	isEmpty()	Test for an empty DBID collection.
DoubleIntegerDBIDSubList.Itr	iter()	Get a DBID iterator (a more efficient API).
int	size()	Retrieve the collection / data size.
DoubleIntegerDBIDList	slice(int begin, int end)	Get a subset list.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface elki.database.ids.DBIDs

forEach

Methods inherited from interface elki.database.ids.DoubleDBIDList

forEachDouble

Field Detail

begin

private final int begin

Start offset.

end

private final int end

End offset.

inner

private final DoubleIntegerDBIDList inner

Wrapped inner result.

Constructor Detail

DoubleIntegerDBIDSubList

public DoubleIntegerDBIDSubList(DoubleIntegerDBIDList inner,
                                int begin,
                                int end)

Constructor.

Parameters:

inner - Inner instance

begin - Begin offset

end - End offset

Method Detail

assignVar

public DBIDVar assignVar(int index,
                         DBIDVar var)

Description copied from interface: DoubleDBIDList

Assign a DBID variable the value of position index.

Specified by:

assignVar in interface DoubleDBIDList

Parameters:

index - Position

var - Variable to assign the value to.

doubleValue

public double doubleValue(int index)

Description copied from interface: DoubleDBIDList

Get the double value at a given index (to access the DBID, either use DoubleDBIDList.iter() or DoubleDBIDList.assignVar(int, elki.database.ids.DBIDVar).

Specified by:

doubleValue in interface DoubleDBIDList

Parameters:

index - Index

Returns:

Value

iter

public DoubleIntegerDBIDSubList.Itr iter()

Description copied from interface: DBIDs

Get a DBID iterator (a more efficient API).

Example:

 
 for(DBIDIter iter = ids.iter(); iter.valid(); iter.advance()) {
   NumberVector vec = relation.get(iter); // iter is a temporary object reference
 }
 
 

Specified by:

iter in interface DBIDs

Specified by:

iter in interface DoubleDBIDList

Specified by:

iter in interface DoubleIntegerDBIDList

Specified by:

iter in interface IntegerDBIDs

Returns:

iterator

contains

public boolean contains(DBIDRef o)

Description copied from interface: DBIDs

Test whether an ID is contained.

Specified by:

contains in interface DBIDs

Parameters:

o - object to test

Returns:

true when contained

isEmpty

public boolean isEmpty()

Description copied from interface: DBIDs

Test for an empty DBID collection.

Specified by:

isEmpty in interface DBIDs

Returns:

true when empty.

size

public int size()

Description copied from interface: DBIDs

Retrieve the collection / data size.

Specified by:

size in interface DBIDs

Specified by:

size in interface DoubleDBIDList

Returns:

collection size

slice

public DoubleIntegerDBIDList slice(int begin,
                                   int end)

Description copied from interface: DoubleDBIDList

Get a subset list.

Specified by:

slice in interface DoubleDBIDList

Specified by:

slice in interface DoubleIntegerDBIDList

Parameters:

begin - Begin

end - End

Returns:

Sublist