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Java > Open Source Codes > org > opencms > search > extractors > CmsExtractorHtml


1 /*
2  * File : $Source: /usr/local/cvs/opencms/src/org/opencms/search/extractors/CmsExtractorHtml.java,v $
3  * Date : $Date: 2005/06/23 11:11:28 $
4  * Version: $Revision: 1.7 $
5  *
6  * This library is part of OpenCms -
7  * the Open Source Content Mananagement System
8  *
9  * Copyright (c) 2005 Alkacon Software GmbH (http://www.alkacon.com)
10  *
11  * This library is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU Lesser General Public
13  * License as published by the Free Software Foundation; either
14  * version 2.1 of the License, or (at your option) any later version.
15  *
16  * This library is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  * Lesser General Public License for more details.
20  *
21  * For further information about Alkacon Software GmbH, please see the
22  * company website: http://www.alkacon.com
23  *
24  * For further information about OpenCms, please see the
25  * project website: http://www.opencms.org
26  *
27  * You should have received a copy of the GNU Lesser General Public
28  * License along with this library; if not, write to the Free Software
29  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30  */
31
32 package org.opencms.search.extractors;
33
34 import org.opencms.main.OpenCms;
35 import org.opencms.util.CmsHtmlExtractor;
36 import org.opencms.util.CmsStringUtil;
37
38 import java.io.InputStream JavaDoc;
39
40 /**
41  * Extracts the text form a RTF document.<p>
42  *
43  * @author Alexander Kandzior
44  *
45  * @version $Revision: 1.7 $
46  *
47  * @since 6.0.0
48  */
49 public final class CmsExtractorHtml extends A_CmsTextExtractor {
50
51     /** Static member instance of the extractor. */
52     private static final CmsExtractorHtml INSTANCE = new CmsExtractorHtml();
53
54     /**
55      * Hide the public constructor.<p>
56      */
57     private CmsExtractorHtml() {
58
59         // noop
60 }
61
62     /**
63      * Returns an instance of this text extractor.<p>
64      *
65      * @return an instance of this text extractor
66      */
67     public static I_CmsTextExtractor getExtractor() {
68
69         return INSTANCE;
70     }
71
72     /**
73      * @see org.opencms.search.extractors.I_CmsTextExtractor#extractText(java.io.InputStream, java.lang.String)
74      */
75     public I_CmsExtractionResult extractText(InputStream JavaDoc in, String JavaDoc encoding) throws Exception JavaDoc {
76
77         if (CmsStringUtil.isEmpty(encoding)) {
78             encoding = OpenCms.getSystemInfo().getDefaultEncoding();
79         }
80
81         String JavaDoc result = CmsHtmlExtractor.extractText(in, encoding);
82         result = removeControlChars(result);
83         return new CmsExtractionResult(result);
84     }
85 }
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