Example usage for org.apache.lucene.search.highlight QueryTermExtractor QueryTermExtractor

Introduction

In this page you can find the example usage for org.apache.lucene.search.highlight QueryTermExtractor QueryTermExtractor.

Prototype

QueryTermExtractor

Source Link

Usage

From source file:org.conifer.MyBean.java

License:Apache License

public static String sortOutTerms(String queryString, String resultString, String tag, String strLen)
        throws org.apache.lucene.queryParser.ParseException {
    String startTag = "<" + tag + ">";
    String endTag = "</" + tag + ">";
    StringBuffer termBuf = new StringBuffer();
    int addToLen = startTag.length() + endTag.length();

    int resultLen = Integer.parseInt(strLen);
    String displayString = resultString;

    QueryParser luceneParser = new QueryParser("text", new StandardAnalyzer());
    QueryTermExtractor luceneTerms = new QueryTermExtractor();
    Query luceneQuery = null;/*from  w  ww .  ja v  a  2  s .  c  o  m*/
    Query query = null;
    WeightedTerm[] weightTerms = null;
    luceneQuery = luceneParser.parse(queryString);
    weightTerms = luceneTerms.getTerms(luceneQuery);

    for (int i = 0; i < weightTerms.length; i++) {
        String term = weightTerms[i].getTerm();
        Pattern replace = Pattern.compile(term, Pattern.CASE_INSENSITIVE);
        Matcher matcher = replace.matcher(displayString);
        while (matcher.find()) {
            //displayString = matcher.replaceAll(startTag + term + endTag);
            if (termBuf.toString().indexOf(matcher.group(0)) == -1) {
                displayString = displayString.replaceAll(matcher.group(0),
                        startTag + matcher.group(0) + endTag);
                resultLen += addToLen;
            } //if
            termBuf.append(matcher.group(0));
            termBuf.append(",");
        } //while
    } //for

    int hlStart = displayString.indexOf(startTag);
    //System.out.println("hlStart: " + hlStart);

    if (hlStart > resultLen) {
        String tmpString = displayString.substring(0, hlStart);
        hlStart = tmpString.lastIndexOf(" ");
        displayString = "..." + displayString.substring(++hlStart);
        resultLen += 3;
    } //if

    if (displayString.length() > resultLen) {
        displayString = displayString.substring(0, resultLen);
        hlStart = displayString.lastIndexOf(startTag);
        int hlEnd = displayString.lastIndexOf(endTag);
        if (hlEnd < hlStart)
            displayString = displayString.substring(0, --hlStart);
        displayString = displayString + "...";
    } //if

    return displayString;
}

---