lucee.runtime.search.lucene2.highlight._Highlight.java Source code

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Here is the source code for lucee.runtime.search.lucene2.highlight._Highlight.java

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/**
 *
 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either 
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 * 
 **/
package lucee.runtime.search.lucene2.highlight;

import java.io.IOException;
import java.io.StringReader;

import lucee.commons.lang.StringUtil;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.highlight.Highlighter;
import org.apache.lucene.search.highlight.QueryScorer;
import org.apache.lucene.search.highlight.SimpleHTMLFormatter;

public class _Highlight {

    public static String createContextSummary(Object highlighter, Analyzer analyzer, String text,
            int maxNumFragments, String defaultValue) throws IOException {
        //try {
        if (!(highlighter instanceof Highlighter) || analyzer == null || StringUtil.isEmpty(text))
            return defaultValue;

        TokenStream tokenStream = analyzer.tokenStream("", new StringReader(text));
        return ((Highlighter) highlighter).getBestFragments(tokenStream, text, maxNumFragments, "...");
        //}catch (Throwable t) {}

    }

    public static Object createHighlighter(Query query, String highlightBegin, String highlightEnd) {

        return new Highlighter(
                //new SimpleHTMLFormatter("<span class=\"matching-term\">","</span>"),
                new SimpleHTMLFormatter(highlightBegin, highlightEnd), new QueryScorer(query));

    }

}