Example usage for org.apache.lucene.queryparser.classic MultiFieldQueryParser MultiFieldQueryParser

Introduction

In this page you can find the example usage for org.apache.lucene.queryparser.classic MultiFieldQueryParser MultiFieldQueryParser.

Prototype

public MultiFieldQueryParser(String[] fields, Analyzer analyzer)

Source Link

Document

Creates a MultiFieldQueryParser.

Usage

From source file:Tweet_search.TweetSearcher.java

public TweetSearcher() throws IOException, Exception {
    GetProjetBaseDirAndSetProjectPropFile setPropFile = new GetProjetBaseDirAndSetProjectPropFile();
    prop = setPropFile.prop;/*from w  w w  .j a  va2  s. co m*/
    propFileName = setPropFile.propFileName;

    tweet_starts_from_date = Integer.parseInt(prop.getProperty("tweet.starts.from.date", "20"));
    tweet_ends_from_date = Integer.parseInt(prop.getProperty("tweet.ends.from.date", "29"));

    /* max number of files to return for each query */
    num_ret = Integer.parseInt(setPropFile.prop.getProperty("retrieve.num_wanted"));
    /* Set Retrieval model set */
    setSimilarityFlag = setPropFile.prop.getProperty("retrieval.model");

    String indexDirectoryPath = prop.getProperty("indexPath");
    if (!indexDirectoryPath.endsWith("/"))
        indexDirectoryPath = indexDirectoryPath.concat("/");

    reader = new IndexReader[tweet_ends_from_date - tweet_starts_from_date + 1];
    searcher = new IndexSearcher[tweet_ends_from_date - tweet_starts_from_date + 1];
    for (int i = 0; i < tweet_ends_from_date - tweet_starts_from_date + 1; i++) {
        reader[i] = DirectoryReader.open(FSDirectory
                .open(new File(indexDirectoryPath.concat(Integer.toString(i + tweet_starts_from_date)))));
        searcher[i] = new IndexSearcher(reader[i]);

        /* setting the similarity function */
        /* 1-BM25, 2-LM-JM, 3-LM-D, 4-DefaultLuceneSimilarity */
        setSimilarityFn_ResFileName(i);
        /* */
    }

    /* setting the fields in which the searching will be perfomed */
    String[] fields = setQueryFieldsToSearch();

    //        String []fields = new String[]{"abstract", "title", "contexts"};
    /* === */

    /* using the same analyzer which is used for indexing */
    Analyzer engAnalyzer = getAnalyzer();
    mFQueryParser = new MultiFieldQueryParser(fields, engAnalyzer);

    //        num_wanted = Integer.parseInt(prop.getProperty("retrieve.num_wanted","100"));
    num_wanted = num_ret;

    /* setting query list*/
    queries = constructQuery();

    /* queries has all the RAW data read from the query file like: 
    query_num, paper_title, paper_abtract, context etc.
    */
    String qfield = "qfield-";
    for (int i = 0; i < fields.length; i++) {
        if (i == 0)
            qfield = qfield.concat(fields[i]);
        else
            qfield = qfield.concat("-").concat(fields[i]);
    }
    DateFormat dateFormat = new SimpleDateFormat("yyyyMMdd-HHmmss");
    //get current date time with Date()
    Date date = new Date();

    resultsFile = dateFormat.format(date).concat("-" + resultsFile).concat("-").concat(qfield).concat("-topres")
            .concat(new Integer(num_wanted).toString()).concat(".res");

    String path = prop.getProperty("resPath");
    if (!path.endsWith("/"))
        path = path.concat("/");
    resultsFile = path.concat(resultsFile);
    System.out.println("Result will be saved in: " + resultsFile);

}