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Obfuscate.java
Package: Weka-3-2.rar [view]
Upload User: rhdiban
Upload Date: 2013-08-09
Package Size: 15085k
Code Size: 4k
Category:
Windows Develop
Development Platform:
Java
- /*
- * 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 2 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, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- /*
- * Obfuscate.java
- * Copyright (C) 2000 Intelligenesis Corp.
- *
- */
- package weka.filters.unsupervised.attribute;
- import weka.filters.*;
- import java.io.*;
- import java.util.*;
- import weka.core.*;
- /**
- * A simple instance filter that renames the relation, all attribute names
- * and all nominal (and string) attribute values. For exchanging sensitive
- * datasets. Currently doesn't like string attributes.
- *
- * @author Len Trigg (len@intelligenesis.net)
- * @version $Revision: 1.1 $
- */
- public class Obfuscate extends Filter implements UnsupervisedFilter,
- StreamableFilter {
- /**
- * Returns a string describing this filter
- *
- * @return a description of the filter suitable for
- * displaying in the explorer/experimenter gui
- */
- public String globalInfo() {
- return "An instance filter that obfuscates all strings in the data";
- }
- /**
- * Sets the format of the input instances.
- *
- * @param instanceInfo an Instances object containing the input instance
- * structure (any instances contained in the object are ignored - only the
- * structure is required).
- * @return true if the outputFormat may be collected immediately
- */
- public boolean setInputFormat(Instances instanceInfo) throws Exception {
- super.setInputFormat(instanceInfo);
- // Make the obfuscated header
- FastVector v = new FastVector();
- for (int i = 0; i < instanceInfo.numAttributes(); i++) {
- Attribute oldAtt = instanceInfo.attribute(i);
- Attribute newAtt = null;
- switch (oldAtt.type()) {
- case Attribute.NUMERIC:
- newAtt = new Attribute("A" + (i + 1));
- break;
- case Attribute.NOMINAL:
- FastVector vals = new FastVector();
- for (int j = 0; j < oldAtt.numValues(); j++) {
- vals.addElement("V" + (j + 1));
- }
- newAtt = new Attribute("A" + (i + 1), vals);
- break;
- case Attribute.STRING:
- default:
- newAtt = (Attribute) oldAtt.copy();
- System.err.println("Not converting attribute: " + oldAtt.name());
- break;
- }
- v.addElement(newAtt);
- }
- Instances newHeader = new Instances("R", v, 10);
- setOutputFormat(newHeader);
- return true;
- }
- /**
- * Input an instance for filtering. Ordinarily the instance is processed
- * and made available for output immediately. Some filters require all
- * instances be read before producing output.
- *
- * @param instance the input instance
- * @return true if the filtered instance may now be
- * collected with output().
- * @exception IllegalStateException if no input format has been set.
- */
- public boolean input(Instance instance) {
- if (getInputFormat() == null) {
- throw new IllegalStateException("No input instance format defined");
- }
- if (m_NewBatch) {
- resetQueue();
- m_NewBatch = false;
- }
- push((Instance)instance.copy());
- return true;
- }
- /**
- * Main method for testing this class.
- *
- * @param argv should contain arguments to the filter: use -h for help
- */
- public static void main(String [] argv) {
- try {
- if (Utils.getFlag('b', argv)) {
- Filter.batchFilterFile(new Obfuscate(), argv);
- } else {
- Filter.filterFile(new Obfuscate(), argv);
- }
- } catch (Exception ex) {
- System.out.println(ex.getMessage());
- }
- }
- }