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The Waikato Environment for Knowledge Analysis (WEKA), a machine
learning workbench. This version represents the developer version, the
"bleeding edge" of development, you could say. New functionality gets added
to this version.
/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see m_FileLoaders;
/** all available URL loaders (extension <-> classname). */
protected static Hashtable m_URLFileLoaders;
/** all available savers (extension <-> classname). */
protected static Hashtable m_FileSavers;
/**
* checks whether the given class is one of the hardcoded core file loaders.
*
* @param classname the class to check
* @return true if the class is one of the core loaders
* @see ConverterResources#CORE_FILE_LOADERS
*/
public static boolean isCoreFileLoader(String classname) {
boolean result;
String[] classnames;
classnames = CORE_FILE_LOADERS.split(",");
result = (Arrays.binarySearch(classnames, classname) >= 0);
return result;
}
/**
* checks whether the given class is one of the hardcoded core file savers.
*
* @param classname the class to check
* @return true if the class is one of the core savers
* @see ConverterResources#CORE_FILE_SAVERS
*/
public static boolean isCoreFileSaver(String classname) {
boolean result;
String[] classnames;
classnames = CORE_FILE_SAVERS.split(",");
result = (Arrays.binarySearch(classnames, classname) >= 0);
return result;
}
/**
* Returns the file loaders.
*
* @return the file loaders
*/
public static Hashtable getFileLoaders() {
return m_FileLoaders;
}
/**
* Returns the URL file loaders.
*
* @return the URL file loaders
*/
public static Hashtable getURLFileLoaders() {
return m_URLFileLoaders;
}
/**
* Returns the file savers.
*
* @return the file savers
*/
public static Hashtable getFileSavers() {
return m_FileSavers;
}
public static void initialize() {
List classnames;
try {
// init
m_FileLoaders = new Hashtable();
m_URLFileLoaders = new Hashtable();
m_FileSavers = new Hashtable();
// generate properties
// Note: does NOT work with RMI, hence m_FileLoadersCore/m_FileSaversCore
Properties props = GenericPropertiesCreator.getGlobalOutputProperties();
if (props == null) {
GenericPropertiesCreator creator = new GenericPropertiesCreator();
creator.execute(false);
props = creator.getOutputProperties();
}
// loaders
m_FileLoaders = getFileConverters(
props.getProperty(Loader.class.getName(), ConverterResources.CORE_FILE_LOADERS),
new String[] { FileSourcedConverter.class.getName() });
// URL loaders
m_URLFileLoaders = getFileConverters(
props.getProperty(Loader.class.getName(), ConverterResources.CORE_FILE_LOADERS),
new String[] { FileSourcedConverter.class.getName(),
URLSourcedLoader.class.getName() });
// savers
m_FileSavers = getFileConverters(
props.getProperty(Saver.class.getName(), ConverterResources.CORE_FILE_SAVERS),
new String[] { FileSourcedConverter.class.getName() });
} catch (Exception e) {
e.printStackTrace();
// ignore
} finally {
// loaders
if (m_FileLoaders.size() == 0) {
classnames = PluginManager.getPluginNamesOfTypeList(AbstractFileLoader.class
.getName());
if (classnames.size() > 0) {
m_FileLoaders = getFileConverters(classnames,
new String[] { FileSourcedConverter.class.getName() });
} else {
m_FileLoaders = getFileConverters(ConverterResources.CORE_FILE_LOADERS,
new String[] { FileSourcedConverter.class.getName() });
}
}
// URL loaders
if (m_URLFileLoaders.size() == 0) {
classnames = PluginManager.getPluginNamesOfTypeList(AbstractFileLoader.class
.getName());
if (classnames.size() > 0) {
m_URLFileLoaders = getFileConverters(classnames,
new String[] { FileSourcedConverter.class.getName(),
URLSourcedLoader.class.getName() });
} else {
m_URLFileLoaders = getFileConverters(ConverterResources.CORE_FILE_LOADERS,
new String[] { FileSourcedConverter.class.getName(),
URLSourcedLoader.class.getName() });
}
}
// savers
if (m_FileSavers.size() == 0) {
classnames = PluginManager.getPluginNamesOfTypeList(AbstractFileSaver.class
.getName());
if (classnames.size() > 0) {
m_FileSavers = getFileConverters(classnames,
new String[] { FileSourcedConverter.class.getName() });
} else {
m_FileSavers = getFileConverters(ConverterResources.CORE_FILE_SAVERS,
new String[] { FileSourcedConverter.class.getName() });
}
}
}
}
/**
* returns a hashtable with the association
* "file extension <-> converter classname" for the comma-separated list
* of converter classnames.
*
* @param classnames comma-separated list of converter classnames
* @param intf interfaces the converters have to implement
* @return hashtable with ExtensionFileFilters
*/
protected static Hashtable getFileConverters(
String classnames, String[] intf) {
Vector list;
String[] names;
int i;
list = new Vector();
names = classnames.split(",");
for (i = 0; i < names.length; i++) {
list.add(names[i]);
}
return getFileConverters(list, intf);
}
/**
* returns a hashtable with the association
* "file extension <-> converter classname" for the list of converter
* classnames.
*
* @param classnames list of converter classnames
* @param intf interfaces the converters have to implement
* @return hashtable with ExtensionFileFilters
*/
protected static Hashtable getFileConverters(
List classnames, String[] intf) {
Hashtable result;
String classname;
Class cls;
String[] ext;
FileSourcedConverter converter;
int i;
int n;
result = new Hashtable();
for (i = 0; i < classnames.size(); i++) {
classname = classnames.get(i);
// all necessary interfaces implemented?
for (n = 0; n < intf.length; n++) {
if (!InheritanceUtils.hasInterface(intf[n], classname)) {
continue;
}
}
// get data from converter
try {
cls = WekaPackageClassLoaderManager.forName(classname);
converter = (FileSourcedConverter) cls.newInstance();
ext = converter.getFileExtensions();
} catch (Exception e) {
cls = null;
converter = null;
ext = new String[0];
}
if (converter == null) {
continue;
}
for (n = 0; n < ext.length; n++) {
result.put(ext[n], classname);
}
}
return result;
}
}