topics.TopicDocRewriter.java Source code

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Here is the source code for topics.TopicDocRewriter.java

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// The MIT License
//
// Copyright (c) 2010 Stelios Karabasakis
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
package topics;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.logging.Level;
import lexicon.PayloadFilters;
import lexicon.SentimentLexicon;
import lexicon.TermSentiment;
import lexicon.classifiers.WidestWindowSentimentClassifier;
import org.apache.commons.lang.ArrayUtils;
import util.AppLogger;
import wordnet.Synset;
import wordnet.Synset.SynsetCategory;
import config.Globals;
import config.Paths;

/**
 * Filters a collection of document files used for topic extraction, so that only certain synset
 * types are included
 * 
 * @author Stelios Karabasakis
 */
public class TopicDocRewriter {

    File inputDir = null;
    File outputDir = null;
    File[] docs = null;

    /**
     * Constructor for class TopicDocRewriter
     * 
     * @throws IOException
     */
    public TopicDocRewriter(String inputDir, String outputDir) throws IOException {
        this.inputDir = new File(inputDir);
        if (!(this.inputDir.exists() && this.inputDir.isDirectory()))
            throw new IOException("Directory does not exist: " + inputDir);

        this.outputDir = new File(outputDir);
        if (!(this.outputDir.exists() && this.outputDir.isDirectory()))
            throw new IOException("Directory does not exist: " + outputDir);

        docs = this.inputDir.listFiles(new FilenameFilter() {

            @Override
            public boolean accept(File dir, String name) {
                return name.matches("docs[0-9]+\\.txt");
            }
        });
    }

    public static interface TopicDocTermFilter {

        public boolean acceptSynset(Synset synset);

        public boolean acceptWord(String word);
    }

    private void filterFile(BufferedReader input, BufferedWriter output, TopicDocTermFilter filter)
            throws IOException {
        String inputline;
        while ((inputline = input.readLine()) != null) {
            String[] inputline_array = inputline.split(" ");

            // Passing document terms through the TopicDocTermFilter to determine whether they will
            // be copied to the output file or not
            for (int i = 2; i < inputline_array.length; i++) {
                if (Synset.matchesPattern(inputline_array[i])) {
                    if (!filter.acceptSynset(new Synset(inputline_array[i]))) {
                        inputline_array = (String[]) ArrayUtils.remove(inputline_array, i);
                    }
                }
                // Term is a word
                else {
                    if (!filter.acceptWord(inputline_array[i])) {
                        inputline_array = (String[]) ArrayUtils.remove(inputline_array, i);
                    }
                }
            }

            if (inputline_array.length > 2) {
                // Writing document id and length to the output file
                output.write(inputline_array[0] + " " + (inputline_array.length - 2));

                // Writing terms to file
                for (int i = 2; i < inputline_array.length; i++) {
                    output.write(" " + inputline_array[i]);
                }

                // Completing the document with a newline
                output.newLine();
            }
        }
    }

    public void filterAll(TopicDocTermFilter filter) {
        try {
            for (File current_docs : docs) {
                System.out.println("Now filtering " + current_docs.getName());
                BufferedReader input = new BufferedReader(new FileReader(current_docs));
                BufferedWriter output = new BufferedWriter(
                        new FileWriter(new File(outputDir, current_docs.getName()), false));

                filterFile(input, output, filter);

                input.close();
                output.close();
            }
        } catch (FileNotFoundException e) {
            AppLogger.error.log(Level.SEVERE, e.getMessage());
        } catch (IOException e) {
            AppLogger.error.log(Level.SEVERE, e.getMessage());
        }
    }

    public static void main(String[] args) {
        try {
            // TopicDocRewriter rewriter = new TopicDocRewriter(Paths.tokenListPath + "/original",
            // Paths.tokenListPath
            // + "/filtered");
            // rewriter.filterAll(rewriter.SUBJECTIVITY_FILTER);
            //
            // System.out.println("\n------------------------------------------------------------------");

            TopicDocRewriter rewriter_nv = new TopicDocRewriter(Paths.tokenListPath + "/filtered_nv",
                    Paths.tokenListPath + "/filtered_nv_1");
            rewriter_nv.filterAll(rewriter_nv.VERBS_AND_NOUNS_FILTER);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    private TopicDocTermFilter VERBS_AND_NOUNS_FILTER = new TopicDocTermFilter() {

        private SentimentLexicon lexicon = SentimentLexicon.loadLexicon(new WidestWindowSentimentClassifier(),
                PayloadFilters.FILTER_PLAIN);

        @Override
        public boolean acceptWord(String word) {
            return lexicon.getEntry(SynsetCategory.N, word) != null
                    || lexicon.getEntry(SynsetCategory.V, word) != null;
        }

        @Override
        public boolean acceptSynset(Synset synset) {
            SynsetCategory cat = synset.getPos();
            return cat == SynsetCategory.V || cat == SynsetCategory.N;
        }
    };

    SentimentLexicon lexicon = new SentimentLexicon(false);

    private TopicDocTermFilter SUBJECTIVITY_FILTER = new TopicDocTermFilter() {

        private SynsetCategory[] synsetcats = Synset.getSynsetCategories();
        private SentimentLexicon lexicon = SentimentLexicon.loadLexicon(new WidestWindowSentimentClassifier(),
                PayloadFilters.FILTER_PLAIN);

        @Override
        public boolean acceptWord(String word) {
            for (SynsetCategory synsetcat : synsetcats) {
                TermSentiment s = lexicon.getEntry(synsetcat, word);
                if (s != null)
                    return s.getSubjectivityScore() >= Globals.TopicParameters.subjectivityThreshold;
            }

            return false;
        }

        @Override
        public boolean acceptSynset(Synset synset) {
            TermSentiment s = lexicon.getEntry(synset);
            if (s != null)
                return s.getSubjectivityScore() >= Globals.TopicParameters.subjectivityThreshold;
            else
                return false;
        }
    };

}