edu.rpi.tw.linkipedia.search.searching.EntityAnnotator.java Source code

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Here is the source code for edu.rpi.tw.linkipedia.search.searching.EntityAnnotator.java

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/**
 * Linkipedia, Copyright (c) 2015 Tetherless World Constellation 
 *
 * 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 <http://www.gnu.org/licenses/>.
 */

package edu.rpi.tw.linkipedia.search.searching;

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.queries.CustomScoreQuery;
import org.apache.lucene.queries.function.FunctionQuery;
import org.apache.lucene.queries.function.valuesource.FloatFieldSource;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.queryparser.classic.QueryParser.Operator;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.PhraseQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopScoreDocCollector;
import org.apache.lucene.search.payloads.MaxPayloadFunction;
import org.apache.lucene.search.payloads.PayloadTermQuery;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;

import edu.rpi.tw.linkipedia.search.query.WeightedQuery;
import edu.rpi.tw.linkipedia.search.recognizer.EntityRecognizer;
import edu.rpi.tw.linkipedia.search.similarity.MySimilarity;
import edu.rpi.tw.linkipedia.search.utils.Annotation;

public class EntityAnnotator {

    IndexReader reader;
    IndexSearcher searcher;
    MaxPayloadFunction payloadFunctionMax = new MaxPayloadFunction();
    WeightedQuery wquery;
    EntityRecognizer ER;

    public EntityAnnotator(String indexDir) {
        try {
            IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(indexDir)));
            searcher = new IndexSearcher(reader);
            searcher.setSimilarity(new MySimilarity());
            wquery = new WeightedQuery();
            ER = new EntityRecognizer(searcher);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void setRecognizer(String index) {
        ER = new EntityRecognizer(index);
    }

    public ArrayList<String> getEntityMentions(String query) {
        return ER.getEntityMentions(query);
    }

    public ArrayList<Annotation> mysearch(String label, String[] contexts, int numResult) {
        ArrayList<Annotation> results = new ArrayList<Annotation>();
        TopScoreDocCollector collector = TopScoreDocCollector.create(numResult, false);

        try {

            Query finalQuery = wquery.parse(label, contexts);
            System.out.println("QUERY: " + finalQuery.toString() + "\n");
            searcher.search(finalQuery, collector);

        } catch (Exception e) {
            e.printStackTrace();
        }
        ScoreDoc[] hits = collector.topDocs().scoreDocs;
        int numTotalHits = collector.getTotalHits();

        int start = 0;
        int end = Math.min(numTotalHits, numResult);
        if (end == 0) {
            Annotation annotation = new Annotation(label, "", 0);
            results.add(annotation);
        }
        for (int i = start; i < end; i++) {
            //String thisResult = "";
            Document doc = null;
            try {
                doc = searcher.doc(hits[i].doc);
            } catch (Exception e) {
                e.printStackTrace();
            }
            String url = doc.get("url");
            //      thisResult += url;
            //      String [] triples = doc.getValues("object_original");
            //      List<Field> fields = doc.getFields();

            Annotation annotation = new Annotation(label, url, hits[i].score);
            //      annotation.setTriples(new ArrayList<String>(Arrays.asList(triples)));
            results.add(annotation);
        }
        return results;
    }

    private String generateContent(String label, String[] contexts) {
        String contents = label;
        for (String str : contexts) {
            contents += " " + str;
        }
        return contents;
    }

    public IndexSearcher getSearcher() {
        return searcher;
    }
}