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.utilities.optionhandling.AbstractParameterizable
          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

public class InputStreamDatabaseConnection<O extends DatabaseObject>
extends AbstractDatabaseConnection<O>

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 ClassParameter<Parser<O>>	PARSER_PARAM Parameter to specify the parser to provide a database, must extend Parser.

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, forceExternalID, LABEL_CONCATENATION

Fields inherited from class de.lmu.ifi.dbs.elki.utilities.optionhandling.AbstractParameterizable

optionHandler

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

debug, logger

Constructor Summary

InputStreamDatabaseConnection()
Adds parameter PARSER_PARAM to the option handler additionally to parameters of super class.

Method Summary

Database<O>	getDatabase(Normalization<O> normalization) Returns a Database according to parameter settings.
List<String>	setParameters(List<String> args) Calls the super method and instantiates parser according to the value of parameter PARSER_PARAM.
String	shortDescription() Returns a short description of the class.

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

normalizeAndTransformLabels

Methods inherited from class de.lmu.ifi.dbs.elki.utilities.optionhandling.AbstractParameterizable

addOption, addParameterizable, addParameterizable, checkGlobalParameterConstraints, collectOptions, getAttributeSettings, getParameters, rememberParametersExcept, removeOption, removeParameterizable

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

Methods inherited from interface de.lmu.ifi.dbs.elki.utilities.optionhandling.Parameterizable

checkGlobalParameterConstraints, collectOptions, getParameters

Field Detail

PARSER_ID

public static final OptionID PARSER_ID

OptionID for PARSER_PARAM

PARSER_PARAM

private final ClassParameter<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()

Adds parameter PARSER_PARAM to the option handler additionally to parameters of super class.

Method Detail

getDatabase

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

Description copied from interface: DatabaseConnection

Returns a Database according to parameter settings.

Parameters:

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

Returns:

a Database according to parameter settings

shortDescription

public String shortDescription()

Description copied from class: AbstractParameterizable

Returns a short description of the class.

Specified by:

shortDescription in interface Parameterizable

Overrides:

shortDescription in class AbstractParameterizable

Returns:

Description of the class

setParameters

public List<String> setParameters(List<String> args)
                           throws ParameterException

Calls the super method and instantiates parser according to the value of parameter PARSER_PARAM. The remaining parameters are passed to the parser.

Specified by:

setParameters in interface Parameterizable

Overrides:

setParameters in class AbstractDatabaseConnection<O extends DatabaseObject>

Parameters:

args - parameters to set the attributes accordingly to

Returns:

a list containing the unused parameters

Throws:

ParameterException - in case of wrong parameter-setting