de.lmu.ifi.dbs.elki.database.ids.integer

Class ArrayStaticIntegerDBIDs

java.lang.Object

de.lmu.ifi.dbs.elki.database.ids.integer.ArrayStaticIntegerDBIDs

All Implemented Interfaces:

ArrayDBIDs, ArrayStaticDBIDs, DBIDs, IntegerArrayDBIDs, IntegerArrayStaticDBIDs, IntegerDBIDs, StaticDBIDs

class ArrayStaticIntegerDBIDs
extends java.lang.Object
implements IntegerArrayStaticDBIDs

Static (no modifications allowed) set of Database Object IDs.

Since:

0.4.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	ArrayStaticIntegerDBIDs.Itr DBID iterator in ELKI/C style.
private class	ArrayStaticIntegerDBIDs.Slice Slice of an array.

Field Summary

Fields

Modifier and Type	Field and Description
protected int[]	store The actual storage.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ArrayStaticIntegerDBIDs(int... ids) Constructor.

Method Summary

Modifier and Type	Method and Description
DBIDVar	assignVar(int i, DBIDVar var) Assign a DBID variable the value of position index.
int	binarySearch(DBIDRef key) Search for the position of the given key, assuming that the data set is sorted.
boolean	contains(DBIDRef o) Test whether an ID is contained.
DBID	get(int i) Get the i'th entry (starting at 0) If possible, use an DBIDArrayIter via ArrayDBIDs.iter() instead, or an DBIDVar via ArrayDBIDs.assignVar(int, de.lmu.ifi.dbs.elki.database.ids.DBIDVar)
ArrayStaticIntegerDBIDs.Itr	iter() Iterable
int	size() Size of the DBID "collection".
ArrayStaticIntegerDBIDs.Slice	slice(int begin, int end) Slice a subarray (as view, not copy!)

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.database.ids.DBIDs

forEach, isEmpty

Field Detail

store

protected int[] store

The actual storage.

Constructor Detail

ArrayStaticIntegerDBIDs

protected ArrayStaticIntegerDBIDs(int... ids)

Constructor.

Parameters:

ids - Array of ids.

Method Detail

size

public int size()

Description copied from interface: ArrayDBIDs

Size of the DBID "collection".

Specified by:

size in interface ArrayDBIDs

Specified by:

size in interface DBIDs

Returns:

size

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

get

public DBID get(int i)

Description copied from interface: ArrayDBIDs

Get the i'th entry (starting at 0)

If possible, use an DBIDArrayIter via ArrayDBIDs.iter() instead, or an DBIDVar via ArrayDBIDs.assignVar(int, de.lmu.ifi.dbs.elki.database.ids.DBIDVar)

Specified by:

get in interface ArrayDBIDs

Parameters:

i - Index

Returns:

DBID of i'th entry.

assignVar

public DBIDVar assignVar(int i,
                         DBIDVar var)

Description copied from interface: ArrayDBIDs

Assign a DBID variable the value of position index.

Specified by:

assignVar in interface ArrayDBIDs

Parameters:

i - Position

var - Variable to assign the value to.

binarySearch

public int binarySearch(DBIDRef key)

Description copied from interface: ArrayDBIDs

Search for the position of the given key, assuming that the data set is sorted. For unsorted arrays, the result is undefined.

For keys not found, -(1+insertion position) is returned, as for Java Collections.binarySearch(java.util.List<? extends java.lang.Comparable<? super T>>, T)

Specified by:

binarySearch in interface ArrayDBIDs

Parameters:

key - Key to search for

Returns:

Offset of key

iter

public ArrayStaticIntegerDBIDs.Itr iter()

Description copied from interface: ArrayDBIDs

Iterable

Specified by:

iter in interface ArrayDBIDs

Specified by:

iter in interface DBIDs

Specified by:

iter in interface IntegerArrayDBIDs

Specified by:

iter in interface IntegerArrayStaticDBIDs

Specified by:

iter in interface IntegerDBIDs

Returns:

Iterator

slice

public ArrayStaticIntegerDBIDs.Slice slice(int begin,
                                           int end)

Description copied from interface: ArrayDBIDs

Slice a subarray (as view, not copy!)

Specified by:

slice in interface ArrayDBIDs

Specified by:

slice in interface IntegerArrayDBIDs

Parameters:

begin - Begin (inclusive)

end - End (exclusive)

Returns:

Array slice.