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XMLDump.hpp

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/*
 * (C) Copyright 2002, Schlund+Partner AG
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef SP_GXML_XMLDUMP_HPP
#define SP_GXML_XMLDUMP_HPP

// STDC++
#include <string>

// C libraries
#include <libxslt/xsltInternals.h>
#include <libxml/parser.h>
#include <libxml/xpath.h>
#include <libxml/tree.h>
#include <libxslt/transform.h>
#include <libxslt/xsltutils.h>
#include <libxslt/imports.h>

// Local
#include <sp-gxmlcpp/Util.hpp>
#include <sp-gxmlcpp/XMLTree.hpp>

namespace SP
{
namespace GXML
{

// toDo
class XSLTOutputBuf
{
public:
        enum Exceptions
        {
                MEM_ERR,             // Mem Error
                RESULT_INVALID,      // Result Doc invalid (0 or no children)
                STYLE_INVALID        // Style invalid (0)
        };

        XSLTOutputBuf(xmlDocPtr result, xsltStylesheetPtr style);
        ~XSLTOutputBuf();
        char * getAddr() const;
        int getSize() const;

private:
        xmlCharEncodingHandlerPtr encoder_;
        xmlOutputBufferPtr buf_;
};

class XMLDump
{
public:
        enum Exceptions
        {
                MEM_ERR,             // XML could not be parsed
                NODE_NOT_FOUND_ERR   // Node could not be found from path
        };

        XMLDump(const xmlDocPtr doc, const xmlXPathContextPtr ctxt, const std::string & path="/");
        XMLDump(const XMLTree * tree, const std::string & path="/");
        XMLDump(const xmlDocPtr doc);
        // toDo
        XMLDump(const XSLTOutputBuf * buf);

        ~XMLDump();

        char * getAddr() const;
        std::string get() const;
        int getSize() const;

private:
        xmlBufferPtr nodeDump_;           // This is used to dump XML from some path other than "/"
        std::pair<xmlChar *, int> docDump_;    // This is used to dump the whole XML document (path = "/").
        // toDo
        XSLTOutputBuf * xsltDump_;        // This is used when dumping was actually done outside. Currently only for XSL Transformations.

        // genDump: Master Create Dump Function. Must be used in Constructors only
        void genDump(const xmlDocPtr doc, const xmlXPathContextPtr ctxt, const std::string & path);

        static char * nullString_;
};

}}
#endif

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