de.lmu.ifi.dbs.elki.database.relation

Class ProxyView<O>

java.lang.Object

de.lmu.ifi.dbs.elki.result.AbstractHierarchicalResult

de.lmu.ifi.dbs.elki.database.relation.AbstractRelation<O>

de.lmu.ifi.dbs.elki.database.relation.ProxyView<O>

Type Parameters:

O - Object type

All Implemented Interfaces:

DatabaseQuery, Relation<O>, HierarchicalResult, Result

public class ProxyView<O>
extends AbstractRelation<O>

A virtual partitioning of the database. For the accepted DBIDs, access is passed on to the wrapped representation.

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
private DBIDs	idview The DBIDs we contain
private Relation<O>	inner The wrapped representation where we get the IDs from.
private static Logging	LOG Class logger

Fields inherited from interface de.lmu.ifi.dbs.elki.database.query.DatabaseQuery

HINT_BULK, HINT_EXACT, HINT_HEAVY_USE, HINT_NO_CACHE, HINT_OPTIMIZED_ONLY, HINT_SINGLE

Constructor Summary

Constructors

Constructor and Description
ProxyView(DBIDs idview, Relation<O> inner) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
O	get(DBIDRef id) Get the representation of an object.
SimpleTypeInformation<O>	getDataTypeInformation() Get the data type of this representation
DBIDs	getDBIDs() Get the IDs the query is defined for.
protected Logging	getLogger() Get the class logger.
String	getLongName() A "pretty" name for the result, for use in titles, captions and menus.
String	getShortName() A short name for the result, useful for file names.
DBIDIter	iterDBIDs() Get an iterator access to the DBIDs.
void	setDBIDs(DBIDs ids) Set the DBIDs to use.
int	size() Get the number of DBIDs.

Methods inherited from class de.lmu.ifi.dbs.elki.database.relation.AbstractRelation

getDistanceQuery, getKNNQuery, getKNNQuery, getRangeQuery, getRangeQuery, getRKNNQuery, getRKNNQuery, getSimilarityQuery

Methods inherited from class de.lmu.ifi.dbs.elki.result.AbstractHierarchicalResult

addChildResult, getHierarchy, setHierarchy

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.result.HierarchicalResult

getHierarchy, setHierarchy

Field Detail

LOG

private static final Logging LOG

Class logger

idview

private DBIDs idview

The DBIDs we contain

inner

private final Relation<O> inner

The wrapped representation where we get the IDs from.

Constructor Detail

ProxyView

public ProxyView(DBIDs idview,
         Relation<O> inner)

Constructor.

Parameters:

idview - Ids to expose

inner - Inner representation

Method Detail

get

public O get(DBIDRef id)

Description copied from interface: Relation

Get the representation of an object.

Parameters:

id - Object ID

Returns:

object instance

getDBIDs

public DBIDs getDBIDs()

Description copied from interface: Relation

Get the IDs the query is defined for. If possible, prefer Relation.iterDBIDs().

Returns:

IDs this is defined for

iterDBIDs

public DBIDIter iterDBIDs()

Description copied from interface: Relation

Get an iterator access to the DBIDs. To iterate over all IDs, use the following code fragment:

 for(DBIDIter iter = relation.iterDBIDs(); iter.valid(); iter.advance()) {
    relation.get(iter); // Get the current element
 }
 
 

Returns:

iterator for the DBIDs.

size

public int size()

Description copied from interface: Relation

Get the number of DBIDs.

Returns:

Size

getDataTypeInformation

public SimpleTypeInformation<O> getDataTypeInformation()

Description copied from interface: Relation

Get the data type of this representation

Returns:

Data type

getLongName

public String getLongName()

Description copied from interface: Result

A "pretty" name for the result, for use in titles, captions and menus.

Returns:

result name

getShortName

public String getShortName()

Description copied from interface: Result

A short name for the result, useful for file names.

Returns:

result name

setDBIDs

public void setDBIDs(DBIDs ids)

Set the DBIDs to use.

Parameters:

ids - DBIDs

getLogger

protected Logging getLogger()

Description copied from class: AbstractRelation

Get the class logger.

Specified by:

getLogger in class AbstractRelation<O>

Returns:

Logger