de.lmu.ifi.dbs.elki.datasource.bundle

Class MultipleObjectsBundle

java.lang.Object

de.lmu.ifi.dbs.elki.datasource.bundle.MultipleObjectsBundle

All Implemented Interfaces:

ObjectBundle

public class MultipleObjectsBundle
extends Object
implements ObjectBundle

This class represents a set of "packaged" objects, which is a transfer container for objects e.g. from parsers to a database. It contains the object with multiple representations outside of any index structure.

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
private List<List<?>>	columns Storing the real contents.
private ArrayDBIDs	ids DBIDs for these objects, but may be null.
private static Logging	LOG Class logger.
private BundleMeta	meta Storing the meta data.

Constructor Summary

Constructors

Constructor and Description
MultipleObjectsBundle() Constructor.

Method Summary

Modifier and Type	Method and Description
MultipleObjectsBundle	appendColumn(SimpleTypeInformation<?> type, List<?> data) Helper to add a single column to the bundle.
void	appendSimple(Object... data) Append a new record to the data set.
boolean	assignDBID(int onum, DBIDVar var) Assign the object DBID to a variable
BundleStreamSource	asStream() Process this bundle as stream.
Object	data(int onum, int rnum) Access a particular object and representation.
int	dataLength() Get the number of objects contained.
static MultipleObjectsBundle	fromStream(BundleStreamSource source) Convert an object stream to a bundle
List<?>	getColumn(int i) Get the raw objects columns.
ArrayDBIDs	getDBIDs() Get the DBIDs, may be null.
Object[]	getRow(int row) Get an object row.
static <V> MultipleObjectsBundle	makeSimple(SimpleTypeInformation<? super V> type, List<? extends V> data) Helper to add a single column to the bundle.
static <V1,V2> MultipleObjectsBundle	makeSimple(SimpleTypeInformation<? super V1> type1, List<? extends V1> data1, SimpleTypeInformation<? super V2> type2, List<? extends V2> data2) Helper to add a single column to the bundle.
static <V1,V2,V3> MultipleObjectsBundle	makeSimple(SimpleTypeInformation<? super V1> type1, List<? extends V1> data1, SimpleTypeInformation<? super V2> type2, List<? extends V2> data2, SimpleTypeInformation<? super V3> type3, List<? extends V3> data3) Helper to add a single column to the bundle.
BundleMeta	meta() Access the meta data.
SimpleTypeInformation<?>	meta(int i) Access the meta data.
int	metaLength() Get the metadata length.
void	setDBIDs(ArrayDBIDs ids) Set the DBID range for this bundle.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final Logging LOG

Class logger.

meta

private BundleMeta meta

Storing the meta data.

columns

private List<List<?>> columns

Storing the real contents.

ids

private ArrayDBIDs ids

DBIDs for these objects, but may be null.

Constructor Detail

MultipleObjectsBundle

public MultipleObjectsBundle()

Constructor.

Method Detail

meta

public BundleMeta meta()

Description copied from interface: ObjectBundle

Access the meta data.

Specified by:

meta in interface ObjectBundle

Returns:

metadata

meta

public SimpleTypeInformation<?> meta(int i)

Description copied from interface: ObjectBundle

Access the meta data.

Specified by:

meta in interface ObjectBundle

Parameters:

i - component

Returns:

metadata of component i

metaLength

public int metaLength()

Description copied from interface: ObjectBundle

Get the metadata length.

Specified by:

metaLength in interface ObjectBundle

Returns:

length of metadata

data

public Object data(int onum,
                   int rnum)

Description copied from interface: ObjectBundle

Access a particular object and representation.

Specified by:

data in interface ObjectBundle

Parameters:

onum - Object number

rnum - Representation number

Returns:

Contained data

assignDBID

public boolean assignDBID(int onum,
                          DBIDVar var)

Description copied from interface: ObjectBundle

Assign the object DBID to a variable

Specified by:

assignDBID in interface ObjectBundle

Parameters:

onum - Object number

var - Variable

Returns:

false if there was no predefined DBID.

dataLength

public int dataLength()

Description copied from interface: ObjectBundle

Get the number of objects contained.

Specified by:

dataLength in interface ObjectBundle

Returns:

Number of objects

appendSimple

public void appendSimple(Object... data)

Append a new record to the data set. Pay attention to having the right number of values!

Parameters:

data - Data to append

appendColumn

public MultipleObjectsBundle appendColumn(SimpleTypeInformation<?> type,
                                          List<?> data)

Helper to add a single column to the bundle.

Parameters:

type - Type information

data - Data to add

Returns:

This object, for chaining.

setDBIDs

public void setDBIDs(ArrayDBIDs ids)

Set the DBID range for this bundle.

Parameters:

ids - DBIDs

getDBIDs

public ArrayDBIDs getDBIDs()

Get the DBIDs, may be null.

Returns:

DBIDs

getColumn

public List<?> getColumn(int i)

Get the raw objects columns. Use with caution!

Parameters:

i - column number

Returns:

the ith column

makeSimple

public static <V> MultipleObjectsBundle makeSimple(SimpleTypeInformation<? super V> type,
                                                   List<? extends V> data)

Helper to add a single column to the bundle.

Type Parameters:

V - Object type

Parameters:

type - Type information

data - Data to add

makeSimple

public static <V1,V2> MultipleObjectsBundle makeSimple(SimpleTypeInformation<? super V1> type1,
                                                       List<? extends V1> data1,
                                                       SimpleTypeInformation<? super V2> type2,
                                                       List<? extends V2> data2)

Helper to add a single column to the bundle.

Type Parameters:

V1 - First Object type

V2 - Second Object type

Parameters:

type1 - Type information

data1 - Data column to add

type2 - Second Type information

data2 - Second data column to add

makeSimple

public static <V1,V2,V3> MultipleObjectsBundle makeSimple(SimpleTypeInformation<? super V1> type1,
                                                          List<? extends V1> data1,
                                                          SimpleTypeInformation<? super V2> type2,
                                                          List<? extends V2> data2,
                                                          SimpleTypeInformation<? super V3> type3,
                                                          List<? extends V3> data3)

Helper to add a single column to the bundle.

Type Parameters:

V1 - First Object type

V2 - Second Object type

V3 - Third Object type

Parameters:

type1 - First type information

data1 - First data column to add

type2 - Second type information

data2 - Second data column to add

type3 - Third type information

data3 - Third data column to add

asStream

public BundleStreamSource asStream()

Process this bundle as stream.

Returns:

Stream

fromStream

public static MultipleObjectsBundle fromStream(BundleStreamSource source)

Convert an object stream to a bundle

Parameters:

source - Object stream

Returns:

Static bundle

getRow

public Object[] getRow(int row)

Get an object row.

Parameters:

row - Row number

Returns:

Array of values