Package elki.database.relation

Class MaterializedDoubleRelation

java.lang.Object

elki.database.relation.MaterializedDoubleRelation

All Implemented Interfaces:

DoubleRelation, ModifiableRelation<java.lang.Double>, Relation<java.lang.Double>

public class MaterializedDoubleRelation
extends java.lang.Object
implements DoubleRelation

Represents a single representation. This is attached to a DBIDs object, which you are supposed to manage first. I.e. put the new DBID in, then invoke set(), remove the DBID, then delete().

Since:

0.4.0

Author:

Erich Schubert

Nested Class Summary

Nested classes/interfaces inherited from interface elki.database.relation.DoubleRelation

DoubleRelation.Consumer

Field Summary

Fields

Modifier and Type	Field	Description
private DoubleDataStore	content	Map to hold the objects of the database.
private StaticDBIDs	ids	The DBIDs this is supposed to be defined for.
private java.lang.String	name	The relation name.

Constructor Summary

Constructors

Constructor	Description
MaterializedDoubleRelation(java.lang.String name, DBIDs ids)	Constructor.
MaterializedDoubleRelation(java.lang.String name, DBIDs ids, DoubleDataStore content)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	delete(DBIDRef id)	Delete an objects values.
double	doubleValue(DBIDRef id)	Get the representation of an object.
SimpleTypeInformation<java.lang.Double>	getDataTypeInformation()	Get the data type of this representation
StaticDBIDs	getDBIDs()	Get the IDs the query is defined for.
java.lang.String	getLongName()	Get a long (human readable) name for the relation.
void	insert(DBIDRef id, java.lang.Double val)	Deprecated.
DBIDIter	iterDBIDs()	Get an iterator access to the DBIDs.
void	set(DBIDRef id, double val)	Set an object representation.
int	size()	Get the number of DBIDs.

Methods inherited from class java.lang.Object

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

Methods inherited from interface elki.database.relation.DoubleRelation

forEachDouble, get

Methods inherited from interface elki.database.relation.Relation

forEach

Field Detail

content

private final DoubleDataStore content

Map to hold the objects of the database.

ids

private final StaticDBIDs ids

The DBIDs this is supposed to be defined for. Note: we only keep an unmodifiable reference.

name

private java.lang.String name

The relation name.

Constructor Detail

MaterializedDoubleRelation

public MaterializedDoubleRelation(java.lang.String name,
                                  DBIDs ids)

Constructor.

Parameters:

name - Name

ids - IDs

MaterializedDoubleRelation

public MaterializedDoubleRelation(java.lang.String name,
                                  DBIDs ids,
                                  DoubleDataStore content)

Constructor.

Parameters:

name - Name

ids - IDs

content - Content

Method Detail

doubleValue

public double doubleValue(DBIDRef id)

Description copied from interface: DoubleRelation

Get the representation of an object.

Specified by:

doubleValue in interface DoubleRelation

Parameters:

id - Object ID

Returns:

object instance

set

public void set(DBIDRef id,
                double val)

Description copied from interface: DoubleRelation

Set an object representation.

Specified by:

set in interface DoubleRelation

Parameters:

id - Object ID

val - Value

insert

@Deprecated
public void insert(DBIDRef id,
                   java.lang.Double val)

Deprecated.

Description copied from interface: ModifiableRelation

Set (or insert) an object representation.

Specified by:

insert in interface DoubleRelation

Specified by:

insert in interface ModifiableRelation<java.lang.Double>

Parameters:

id - Object ID

val - Value

delete

public void delete(DBIDRef id)

Delete an objects values.

Specified by:

delete in interface ModifiableRelation<java.lang.Double>

Parameters:

id - ID to delete

getDBIDs

public StaticDBIDs getDBIDs()

Description copied from interface: Relation

Get the IDs the query is defined for.

If possible, prefer Relation.iterDBIDs().

Specified by:

getDBIDs in interface Relation<java.lang.Double>

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
 }
 
 

Specified by:

iterDBIDs in interface Relation<java.lang.Double>

Returns:

iterator for the DBIDs.

size

public int size()

Description copied from interface: Relation

Get the number of DBIDs.

Specified by:

size in interface Relation<java.lang.Double>

Returns:

Size

getDataTypeInformation

public SimpleTypeInformation<java.lang.Double> getDataTypeInformation()

Description copied from interface: Relation

Get the data type of this representation

Specified by:

getDataTypeInformation in interface Relation<java.lang.Double>

Returns:

Data type

getLongName

public java.lang.String getLongName()

Description copied from interface: Relation

Get a long (human readable) name for the relation.

Specified by:

getLongName in interface Relation<java.lang.Double>

Returns:

Relation name