Package elki.database.datastore

Class DataStoreUtil

java.lang.Object

elki.database.datastore.DataStoreUtil

public final class DataStoreUtil
extends java.lang.Object

Storage utility class. Mostly a shorthand for DataStoreFactory.FACTORY.

Since:

0.4.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DataStoreUtil.AscendingByDoubleDataStore	Sort objects by a double relation
static class	DataStoreUtil.AscendingByDoubleDataStoreAndId	Sort objects by a double relation
static class	DataStoreUtil.AscendingByIntegerDataStore	Sort objects by a integer relation
static class	DataStoreUtil.DescendingByDoubleDataStore	Sort objects by a double relation
static class	DataStoreUtil.DescendingByDoubleDataStoreAndId	Sort objects by a double relation
static class	DataStoreUtil.DescendingByIntegerDataStore	Sort objects by a integer relation

Constructor Summary

Constructors

Modifier	Constructor	Description
private	DataStoreUtil()	Private constructor.

Method Summary

Modifier and Type	Method	Description
static WritableDBIDDataStore	makeDBIDStorage(DBIDs ids, int hints)	Make a new storage, to associate the given ids with an object of class dataclass.
static WritableDoubleDataStore	makeDoubleStorage(DBIDs ids, int hints)	Make a new storage, to associate the given ids with an object of class dataclass.
static WritableDoubleDataStore	makeDoubleStorage(DBIDs ids, int hints, double def)	Make a new storage, to associate the given ids with an object of class dataclass.
static WritableIntegerDataStore	makeIntegerStorage(DBIDs ids, int hints)	Make a new storage, to associate the given ids with an object of class dataclass.
static WritableIntegerDataStore	makeIntegerStorage(DBIDs ids, int hints, int def)	Make a new storage, to associate the given ids with an object of class dataclass.
static WritableRecordStore	makeRecordStorage(DBIDs ids, int hints, java.lang.Class<?>... dataclasses)	Make a new record storage, to associate the given ids with an object of class dataclass.
static <T> WritableDataStore<T>	makeStorage(DBIDs ids, int hints, java.lang.Class<? super T> dataclass)	Make a new storage, to associate the given ids with an object of class dataclass.

Methods inherited from class java.lang.Object

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

Constructor Detail

DataStoreUtil

private DataStoreUtil()

Private constructor. Static methods only.

Method Detail

makeStorage

public static <T> WritableDataStore<T> makeStorage(DBIDs ids,
                                                   int hints,
                                                   java.lang.Class<? super T> dataclass)

Make a new storage, to associate the given ids with an object of class dataclass.

Type Parameters:

T - stored data type

Parameters:

ids - DBIDs to store data for

hints - Hints for the storage manager

dataclass - class to store

Returns:

new data store

makeDBIDStorage

public static WritableDBIDDataStore makeDBIDStorage(DBIDs ids,
                                                    int hints)

Make a new storage, to associate the given ids with an object of class dataclass.

Parameters:

ids - DBIDs to store data for

hints - Hints for the storage manager

Returns:

new data store

makeDoubleStorage

public static WritableDoubleDataStore makeDoubleStorage(DBIDs ids,
                                                        int hints)

Make a new storage, to associate the given ids with an object of class dataclass.

Parameters:

ids - DBIDs to store data for

hints - Hints for the storage manager

Returns:

new data store

makeDoubleStorage

public static WritableDoubleDataStore makeDoubleStorage(DBIDs ids,
                                                        int hints,
                                                        double def)

Make a new storage, to associate the given ids with an object of class dataclass.

Parameters:

ids - DBIDs to store data for

hints - Hints for the storage manager

def - Default value

Returns:

new data store

makeIntegerStorage

public static WritableIntegerDataStore makeIntegerStorage(DBIDs ids,
                                                          int hints)

Make a new storage, to associate the given ids with an object of class dataclass.

Parameters:

ids - DBIDs to store data for

hints - Hints for the storage manager

Returns:

new data store

makeIntegerStorage

public static WritableIntegerDataStore makeIntegerStorage(DBIDs ids,
                                                          int hints,
                                                          int def)

Make a new storage, to associate the given ids with an object of class dataclass.

Parameters:

ids - DBIDs to store data for

hints - Hints for the storage manager

def - Default value

Returns:

new data store

makeRecordStorage

public static WritableRecordStore makeRecordStorage(DBIDs ids,
                                                    int hints,
                                                    java.lang.Class<?>... dataclasses)

Make a new record storage, to associate the given ids with an object of class dataclass.

Parameters:

ids - DBIDs to store data for

hints - Hints for the storage manager

dataclasses - classes to store

Returns:

new record store