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// $Id$
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/**
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* Copyright (C) 2013 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.api.service.search;
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import java.io.IOException;
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import org.apache.log4j.Logger;
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import org.apache.lucene.search.DocIdSet;
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import org.apache.lucene.search.DocIdSetIterator;
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/**
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* Helper class, for printing out information on {@link DocIdSet}s
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*
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* @author a.kohlbecker
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* @date Sep 24, 2013
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*
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*/
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public class DocIdBitSetPrinter {
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public static final Logger logger = Logger.getLogger(DocIdBitSetPrinter.class);
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public static String docsAsString(DocIdSet docset, int maxdocs){
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StringBuilder sb = new StringBuilder();
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try {
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DocIdSetIterator it = docset.iterator();
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int i = 0;
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while(i < maxdocs){
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int docId = it.nextDoc();
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if(docId == DocIdSetIterator.NO_MORE_DOCS){
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break;
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}
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sb.append(docId).append(" ");
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}
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} catch (IOException e) {
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logger.error("Error while reding doc ids from DocIdSet", e);
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}
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return sb.toString();
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}
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}
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