Package elki.application.cache

Class PrecomputeDistancesAsciiApplication<O>

java.lang.Object

elki.application.AbstractApplication

elki.application.cache.PrecomputeDistancesAsciiApplication<O>

Type Parameters:

O - Object type

public class PrecomputeDistancesAsciiApplication<O>
extends AbstractApplication

Application to precompute pairwise distances into an ascii file.

IDs in the output file will always begin at 0.

The result can then be used with the DoubleDistanceParse.

Symmetry is assumed.

Since:

0.2

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PrecomputeDistancesAsciiApplication.Par<O>	Parameterization class.

Field Summary

Fields

Modifier and Type	Field	Description
private Database	database	Data source to process.
private boolean	debugExtraCheckSymmetry	Debug flag, to double-check all write operations.
private Distance<? super O>	distance	Distance function that is to be cached.
static java.lang.String	GZIP_POSTFIX	Gzip file name postfix.
private static Logging	LOG	The logger for this class.
private java.nio.file.Path	out	Output file.

Fields inherited from class elki.application.AbstractApplication

REFERENCE, VERSION

Constructor Summary

Constructors

Constructor	Description
PrecomputeDistancesAsciiApplication(Database database, Distance<? super O> distance, java.nio.file.Path out)	Constructor.

Method Summary

Modifier and Type	Method	Description
static void	main(java.lang.String[] args)	Main method, delegate to super class.
private static java.io.PrintStream	openStream(java.nio.file.Path out)	Open the output stream, using gzip if necessary.
void	run()	Runs the application.

Methods inherited from class elki.application.AbstractApplication

printErrorMessage, runCLIApplication, usage

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

The logger for this class.

GZIP_POSTFIX

public static final java.lang.String GZIP_POSTFIX

Gzip file name postfix.

See Also:

Constant Field Values

debugExtraCheckSymmetry

private boolean debugExtraCheckSymmetry

Debug flag, to double-check all write operations.

database

private Database database

Data source to process.

distance

private Distance<? super O> distance

Distance function that is to be cached.

out

private java.nio.file.Path out

Output file.

Constructor Detail

PrecomputeDistancesAsciiApplication

public PrecomputeDistancesAsciiApplication(Database database,
                                           Distance<? super O> distance,
                                           java.nio.file.Path out)

Constructor.

Parameters:

database - Data source

distance - Distance function

out - Matrix output file

Method Detail

run

public void run()

Description copied from class: AbstractApplication

Runs the application.

Specified by:

run in class AbstractApplication

openStream

private static java.io.PrintStream openStream(java.nio.file.Path out)
                                       throws java.io.IOException

Open the output stream, using gzip if necessary.

Parameters:

out - Output file name.

Returns:

Output stream

Throws:

java.io.IOException

main

public static void main(java.lang.String[] args)

Main method, delegate to super class.

Parameters:

args - Command line arguments