LibXmlDomReader.hxx

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00001 /*
00002  * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
00003  *                         UNIVERSITAT POMPEU FABRA
00004  *
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License as published by
00008  * the Free Software Foundation; either version 2 of the License, or
00009  * (at your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this program; if not, write to the Free Software
00018  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00019  *
00020  */
00021 #ifndef LibXmlDomReader_hxx
00022 #define LibXmlDomReader_hxx
00023 
00024 #include "XmlStorageErr.hxx"
00025 
00026 #include <string>
00027 #include <list>
00028 #include <sstream>
00029 #include "Assert.hxx"
00030 #include <libxml++/parsers/domparser.h>
00031 
00032 namespace CLAM
00033 {
00034 
00039 class LibXmlDomReader
00040 {
00041         xmlpp::DomParser * parser;
00042         public:
00043                 LibXmlDomReader()
00044                 {
00045                         // TODO: This is a hack for xerces bug on adoptNode, parser should be local variable
00046                         // This should be done in the read method itself when the xerces but is solved
00047                         parser = new xmlpp::DomParser;
00048                 }
00049                 ~LibXmlDomReader()
00050                 {
00051                         // TODO: This is a hack for xerces bug on adoptNode, parser should be local variable
00052                         if (parser) delete parser;
00053                 }
00054                 // TODO: This is a hack parser should be local variable
00055                 xmlpp::DomParser * adoptParser()
00056                 {
00057                         xmlpp::DomParser * temp = parser;
00058                         parser = 0;
00059                         return temp;
00060                 }
00061                 xmlpp::Document * read(std::istream & target)
00062                 {
00063                         if (target.fail()) throw XmlStorageErr("Unable to open the document source");
00064                         parser->set_validate(false);
00065                         parser->set_substitute_entities();
00066                         try
00067                         {
00068                                 parser->parse_stream(target);
00069                         }
00070                         catch (xmlpp::parse_error & e)
00071                         {
00072                                 throw XmlStorageErr(
00073                                         std::string("\nXML Parser Errors:\n")+e.what()+"\n");
00074                         }
00075                         xmlpp::Document *doc = parser->get_document();
00076                         CLAM_ASSERT(doc,"No errors but document not loaded!");
00077                         return doc;
00078                 }
00079 };
00080 
00081 
00082 
00083 }
00084 #endif//LibXmlDomReader_hxx
00085 
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