de.lmu.ifi.dbs.elki.database.connection
Class InputStreamDatabaseConnection<O extends DatabaseObject>

java.lang.Object
  de.lmu.ifi.dbs.elki.logging.AbstractLoggable
      de.lmu.ifi.dbs.elki.database.connection.AbstractDatabaseConnection<O>
          de.lmu.ifi.dbs.elki.database.connection.InputStreamDatabaseConnection<O>

Type Parameters:

O - the type of DatabaseObject to be provided by the implementing class as element of the supplied database

All Implemented Interfaces:

DatabaseConnection<O>, Parameterizable

Direct Known Subclasses:

FileBasedDatabaseConnection

@Title(value="Input-Stream based database connection")
@Description(value="Parse an input stream such as STDIN into a database.")
public class InputStreamDatabaseConnection<O extends DatabaseObject>
extends AbstractDatabaseConnection<O>
implements Parameterizable

Provides a database connection expecting input from an input stream such as stdin.

Author:

Arthur Zimek

Field Summary

(package private) InputStream	in The input stream to parse from.
(package private) Parser<O>	parser Holds the instance of the parser specified by PARSER_PARAM.
static OptionID	PARSER_ID OptionID for PARSER_PARAM
private ObjectParameter<Parser<O>>	PARSER_PARAM Parameter to specify the parser to provide a database, must extend Parser.
static OptionID	SEED_ID OptionID for SEED_PARAM.
private LongParameter	SEED_PARAM Parameter to specify a seed for randomly shuffling the rows of the database.

Fields inherited from class de.lmu.ifi.dbs.elki.database.connection.AbstractDatabaseConnection

CLASS_LABEL_CLASS_ID, CLASS_LABEL_INDEX_ID, classLabelIndex, database, DATABASE_ID, EXTERNAL_ID_INDEX_ID, LABEL_CONCATENATION

Fields inherited from class de.lmu.ifi.dbs.elki.logging.AbstractLoggable

debug, logger

Constructor Summary

InputStreamDatabaseConnection(Parameterization config)
Constructor, adhering to Parameterizable

Method Summary

Database<O>

getDatabase(Normalization<O> normalization) Returns a Database according to parameter settings.

Methods inherited from class de.lmu.ifi.dbs.elki.database.connection.AbstractDatabaseConnection

normalizeAndTransformLabels

Methods inherited from class de.lmu.ifi.dbs.elki.logging.AbstractLoggable

debugFine, debugFiner, debugFinest, exception, progress, verbose, warning

Methods inherited from class java.lang.Object

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

Field Detail

PARSER_ID

public static final OptionID PARSER_ID

OptionID for PARSER_PARAM

SEED_ID

public static final OptionID SEED_ID

OptionID for SEED_PARAM.

SEED_PARAM

private final LongParameter SEED_PARAM

Parameter to specify a seed for randomly shuffling the rows of the database. If unused, no shuffling will be performed. Shuffling takes time linearly dependent from the size of the database.

Key: -dbc.seed

PARSER_PARAM

private final ObjectParameter<Parser<O extends DatabaseObject>> PARSER_PARAM

Parameter to specify the parser to provide a database, must extend Parser.

Default value: DoubleVectorLabelParser

Key: -dbc.parser

parser

Parser<O extends DatabaseObject> parser

Holds the instance of the parser specified by PARSER_PARAM.

in

InputStream in

The input stream to parse from.

Constructor Detail

InputStreamDatabaseConnection

public InputStreamDatabaseConnection(Parameterization config)

Constructor, adhering to Parameterizable

Parameters:

config - Parameterization

Method Detail

getDatabase

public Database<O> getDatabase(Normalization<O> normalization)

Description copied from interface: DatabaseConnection

Returns a Database according to parameter settings.

Specified by:

getDatabase in interface DatabaseConnection<O extends DatabaseObject>

Parameters:

normalization - Normalization to perform a normalization if this action is supported. May remain null.

Returns:

a Database according to parameter settings