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The Waikato Environment for Knowledge Analysis (WEKA), a machine
learning workbench. This is the stable version. Apart from bugfixes, this version
does not receive any other updates.
/*
* 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 .
*/
/*
* SortLabels.java
* Copyright (C) 2009-2012 University of Waikato, Hamilton, New Zealand
*/
package weka.filters.unsupervised.attribute;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Enumeration;
import java.util.Vector;
import weka.core.Attribute;
import weka.core.Capabilities;
import weka.core.Capabilities.Capability;
import weka.core.DenseInstance;
import weka.core.Instance;
import weka.core.Instances;
import weka.core.Option;
import weka.core.Range;
import weka.core.RevisionUtils;
import weka.core.SelectedTag;
import weka.core.Tag;
import weka.core.Utils;
import weka.filters.SimpleStreamFilter;
/**
* A simple filter for sorting the labels of nominal
* attributes.
*
*
*
* Valid options are:
*
*
*
* -D
* Turns on output of debugging information.
*
*
*
* -R <index1,index2-index4,...>
* Specify list of string attributes to convert to words.
* (default: select all relational attributes)
*
*
*
* -V
* Inverts the matching sense of the selection.
*
*
*
* -S <CASE|NON-CASE>
* Determines the type of sorting:
* CASE = Case-sensitive
* NON-CASE = Case-insensitive
* (default: CASE)
*
*
*
*
* @author fracpete (fracpete at waikato dot ac dot nz)
* @version $Revision: 12395 $
*/
public class SortLabels extends SimpleStreamFilter {
/** for serialization. */
private static final long serialVersionUID = 7815204879694105691L;
/**
* Represents a case-sensitive comparator for two strings.
*
* @author fracpete (fracpete at waikato dot ac dot nz)
* @version $Revision: 12395 $
*/
public static class CaseSensitiveComparator implements Comparator,
Serializable {
/** for serialization. */
private static final long serialVersionUID = 7071450356783873277L;
/**
* compares the two strings, returns -1 if o1 is smaller than o2, 0 if equal
* and +1 if greater.
*
* @param o1 the first string to compare
* @param o2 the second string to compare
* @return returns -1 if o1 is smaller than o2, 0 if equal and +1 if greater
*/
@Override
public int compare(String o1, String o2) {
String s1;
String s2;
if ((o1 == null) && (o2 == null)) {
return 0;
} else if (o1 == null) {
return -1;
} else if (o2 == null) {
return +1;
}
s1 = o1;
s2 = o2;
return s1.compareTo(s2);
}
}
/**
* Represents a case-insensitive comparator for two strings.
*
* @author fracpete (fracpete at waikato dot ac dot nz)
* @version $Revision: 12395 $
*/
public static class CaseInsensitiveComparator implements Comparator,
Serializable {
/** for serialization. */
private static final long serialVersionUID = -4515292733342486066L;
/**
* compares the two strings, returns -1 if o1 is smaller than o2, 0 if equal
* and +1 if greater.
*
* @param o1 the first string to compare
* @param o2 the second string to compare
* @return returns -1 if o1 is smaller than o2, 0 if equal and +1 if greater
*/
@Override
public int compare(String o1, String o2) {
String s1;
String s2;
if ((o1 == null) && (o2 == null)) {
return 0;
} else if (o1 == null) {
return -1;
} else if (o2 == null) {
return +1;
}
s1 = o1;
s2 = o2;
return s1.toLowerCase().compareTo(s2.toLowerCase());
}
}
/** sorts the strings case-sensitive. */
public final static int SORT_CASESENSITIVE = 0;
/** sorts the strings case-insensitive. */
public final static int SORT_CASEINSENSITIVE = 1;
/** Tag allowing selection of sort type. */
public final static Tag[] TAGS_SORTTYPE = {
new Tag(SORT_CASESENSITIVE, "case", "Case-sensitive"),
new Tag(SORT_CASEINSENSITIVE, "non-case", "Case-insensitive") };
/**
* the range of attributes to process (only relational ones will be
* processed).
*/
protected Range m_AttributeIndices = new Range("first-last");
/** the new order for the labels. */
protected int[][] m_NewOrder = null;
/** the sort type. */
protected int m_SortType = SORT_CASEINSENSITIVE;
/** the comparator to use for sorting. */
protected Comparator m_Comparator = new CaseSensitiveComparator();
/**
* Returns a string describing this filter.
*
* @return a description of the filter suitable for displaying in the
* explorer/experimenter gui
*/
@Override
public String globalInfo() {
return "A simple filter for sorting the labels of nominal attributes.";
}
/**
* Returns an enumeration describing the available options.
*
* @return an enumeration of all the available options.
*/
@Override
public Enumeration