weka.core.converters
Class ConverterUtils

java.lang.Object
  weka.core.converters.ConverterUtils

All Implemented Interfaces:

Serializable, RevisionHandler

public class ConverterUtils
extends Object
implements Serializable, RevisionHandler

Utility routines for the converter package.

Version:

$Revision: 8034 $

Author:

Mark Hall (mhall@cs.waikato.ac.nz), FracPete (fracpete at waikato dot ac dot nz)

See Also:

Serializable, Serialized Form

Nested Class Summary

static class	ConverterUtils.DataSink Helper class for saving data to files.
static class	ConverterUtils.DataSource Helper class for loading data from files and URLs.

Field Summary

static String	CORE_FILE_LOADERS the core loaders - hardcoded list necessary for RMI/Remote Experiments (comma-separated list).
static String	CORE_FILE_SAVERS the core savers - hardcoded list necessary for RMI/Remote Experiments (comma-separated list).

Constructor Summary

ConverterUtils()

Method Summary

static void	errms(StreamTokenizer tokenizer, String theMsg) Throws error message with line number and last token read.
static Vector<String>	getFileLoaders() returns a vector with the classnames of all the file loaders.
static Vector<String>	getFileSavers() returns a vector with the classnames of all the file savers.
static void	getFirstToken(StreamTokenizer tokenizer) Gets token, skipping empty lines.
static AbstractFileLoader	getLoaderForExtension(String extension) tries to determine the loader to use for this kind of extension, returns null if none can be found.
static AbstractFileLoader	getLoaderForFile(File file) tries to determine the loader to use for this kind of file, returns null if none can be found.
static AbstractFileLoader	getLoaderForFile(String filename) tries to determine the loader to use for this kind of file, returns null if none can be found.
String	getRevision() Returns the revision string.
static AbstractFileSaver	getSaverForExtension(String extension) tries to determine the saver to use for this kind of extension, returns null if none can be found.
static AbstractFileSaver	getSaverForFile(File file) tries to determine the saver to use for this kind of file, returns null if none can be found.
static AbstractFileSaver	getSaverForFile(String filename) tries to determine the saver to use for this kind of file, returns null if none can be found.
static void	getToken(StreamTokenizer tokenizer) Gets token.
static Vector<String>	getURLFileLoaders() returns a vector with the classnames of all the URL file loaders.
static AbstractFileLoader	getURLLoaderForExtension(String extension) tries to determine the URL loader to use for this kind of extension, returns null if none can be found.
static AbstractFileLoader	getURLLoaderForFile(File file) tries to determine the URL loader to use for this kind of file, returns null if none can be found.
static AbstractFileLoader	getURLLoaderForFile(String filename) tries to determine the URL loader to use for this kind of file, returns null if none can be found.
static void	initialize()
static boolean	isCoreFileLoader(String classname) checks whether the given class is one of the hardcoded core file loaders.
static boolean	isCoreFileSaver(String classname) checks whether the given class is one of the hardcoded core file savers.

Methods inherited from class java.lang.Object

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

Field Detail

CORE_FILE_LOADERS

public static final String CORE_FILE_LOADERS

the core loaders - hardcoded list necessary for RMI/Remote Experiments (comma-separated list).

CORE_FILE_SAVERS

public static final String CORE_FILE_SAVERS

the core savers - hardcoded list necessary for RMI/Remote Experiments (comma-separated list).

Constructor Detail

ConverterUtils

public ConverterUtils()

Method Detail

initialize

public static void initialize()

getFirstToken

public static void getFirstToken(StreamTokenizer tokenizer)
                          throws IOException

Gets token, skipping empty lines.

Parameters:

tokenizer - the stream tokenizer

Throws:

IOException - if reading the next token fails

getToken

public static void getToken(StreamTokenizer tokenizer)
                     throws IOException

Gets token.

Parameters:

tokenizer - the stream tokenizer

Throws:

IOException - if reading the next token fails

errms

public static void errms(StreamTokenizer tokenizer,
                         String theMsg)
                  throws IOException

Throws error message with line number and last token read.

Parameters:

theMsg - the error message to be thrown

tokenizer - the stream tokenizer

Throws:

IOException - containing the error message

isCoreFileLoader

public static boolean isCoreFileLoader(String classname)

checks whether the given class is one of the hardcoded core file loaders.

Parameters:

classname - the class to check

Returns:

true if the class is one of the core loaders

See Also:

CORE_FILE_LOADERS

getFileLoaders

public static Vector<String> getFileLoaders()

returns a vector with the classnames of all the file loaders.

Returns:

the classnames of the loaders

getLoaderForFile

public static AbstractFileLoader getLoaderForFile(String filename)

tries to determine the loader to use for this kind of file, returns null if none can be found.

Parameters:

filename - the file to return a converter for

Returns:

the converter if one was found, null otherwise

getLoaderForFile

public static AbstractFileLoader getLoaderForFile(File file)

tries to determine the loader to use for this kind of file, returns null if none can be found.

Parameters:

file - the file to return a converter for

Returns:

the converter if one was found, null otherwise

getLoaderForExtension

public static AbstractFileLoader getLoaderForExtension(String extension)

tries to determine the loader to use for this kind of extension, returns null if none can be found.

Parameters:

extension - the file extension to return a converter for

Returns:

the converter if one was found, null otherwise

getURLFileLoaders

public static Vector<String> getURLFileLoaders()

returns a vector with the classnames of all the URL file loaders.

Returns:

the classnames of the loaders

getURLLoaderForFile

public static AbstractFileLoader getURLLoaderForFile(String filename)

tries to determine the URL loader to use for this kind of file, returns null if none can be found.

Parameters:

filename - the file to return a URL converter for

Returns:

the converter if one was found, null otherwise

getURLLoaderForFile

public static AbstractFileLoader getURLLoaderForFile(File file)

tries to determine the URL loader to use for this kind of file, returns null if none can be found.

Parameters:

file - the file to return a URL converter for

Returns:

the converter if one was found, null otherwise

getURLLoaderForExtension

public static AbstractFileLoader getURLLoaderForExtension(String extension)

tries to determine the URL loader to use for this kind of extension, returns null if none can be found.

Parameters:

extension - the file extension to return a URL converter for

Returns:

the converter if one was found, null otherwise

isCoreFileSaver

public static boolean isCoreFileSaver(String classname)

checks whether the given class is one of the hardcoded core file savers.

Parameters:

classname - the class to check

Returns:

true if the class is one of the core savers

See Also:

CORE_FILE_SAVERS

getFileSavers

public static Vector<String> getFileSavers()

returns a vector with the classnames of all the file savers.

Returns:

the classnames of the savers

getSaverForFile

public static AbstractFileSaver getSaverForFile(String filename)

tries to determine the saver to use for this kind of file, returns null if none can be found.

Parameters:

filename - the file to return a converter for

Returns:

the converter if one was found, null otherwise

getSaverForFile

public static AbstractFileSaver getSaverForFile(File file)

tries to determine the saver to use for this kind of file, returns null if none can be found.

Parameters:

file - the file to return a converter for

Returns:

the converter if one was found, null otherwise

getSaverForExtension

public static AbstractFileSaver getSaverForExtension(String extension)

tries to determine the saver to use for this kind of extension, returns null if none can be found.

Parameters:

extension - the file extension to return a converter for

Returns:

the converter if one was found, null otherwise

getRevision

public String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Returns:

the revision