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BaseXMLFile.cpp

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/*
Copyright (C) 2004  grymse@alhem.net

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
//#include <stdio.h>

#include "BaseXMLFile.h"




BaseXMLFile::BaseXMLFile(const std::string& filename,const std::string& verify_ns,const std::string& verify_root)
: m_doc(NULL)
,m_current(NULL)
{
        xmlNodePtr cur;
        xmlNsPtr ns;

        if (!(m_doc = xmlParseFile(filename.c_str() )))
        {
                fprintf(stderr,"xmlParseFile('%s') failed\n",filename.c_str());
                return;
        }

        if (!(cur = xmlDocGetRootElement(m_doc)))
        {
                fprintf(stderr, "Empty document\n");
                xmlFreeDoc(m_doc);
                m_doc = NULL;
                return;
        }

        if (!verify_ns.size())
        {
                return; // we're ok
        }
        if (!(ns = xmlSearchNsByHref(m_doc, cur, (const xmlChar *) verify_ns.c_str() )))
        {
                fprintf(stderr, "Document namespace != '%s'\n", verify_ns.c_str());
                xmlFreeDoc(m_doc);
                m_doc = NULL;
                return;
        }

        if (!verify_root.size())
        {
                return;
        }
        if (xmlStrcmp(cur -> name, (const xmlChar *) verify_root.c_str() ))
        {
                fprintf(stderr, "Document root != '%s'\n",verify_root.c_str());
                xmlFreeDoc(m_doc);
                m_doc = NULL;
                return;
        }

}


BaseXMLFile::~BaseXMLFile()
{
        if (m_doc)
        {
                xmlFreeDoc(m_doc);
        }
}


xmlNodePtr BaseXMLFile::GetRootElement()
{
        m_current = m_doc ? xmlDocGetRootElement(m_doc) : NULL;
        return m_current;
}


std::string BaseXMLFile::GetProperty(const std::string& name)
{
        xmlChar *p = m_current ? xmlGetProp(m_current, (const xmlChar *) name.c_str() ) : NULL;
        if (!p)
        {
                return "";
        }
        std::string str = (char *)p;
        xmlFree(p);
        return str;
}


xmlNodePtr BaseXMLFile::GetChildrenNode()
{
        m_current = m_current ? m_current -> xmlChildrenNode : NULL;
        return m_current;
}


xmlNodePtr BaseXMLFile::GetNextNode()
{
        do
        {
                m_current = m_current ? m_current -> next : NULL;
        } while (m_current && xmlIsBlankNode( m_current ));
        return m_current;
}


const std::string& BaseXMLFile::GetNodeName()
{
        if (m_current)
        {
                m_current_name = (char *)m_current -> name;
        }
        else
        {
                m_current_name = "";
        }
        return m_current_name;
}


xmlNsPtr BaseXMLFile::GetNodeNs()
{
        if (m_current)
                return m_current -> ns;
        return NULL;
}


const std::string& BaseXMLFile::GetNodeNsPrefix()
{
        if (m_current && m_current -> ns && m_current -> ns -> prefix)
        {
                m_ns_prefix = (char *)m_current -> ns -> prefix;
        }
        else
        {
                m_ns_prefix = "";
        }
        return m_ns_prefix;
}


const std::string& BaseXMLFile::GetNodeNsHref()
{
        if (m_current && m_current -> ns && m_current -> ns -> href)
        {
                m_ns_href = (char *)m_current -> ns -> href;
        }
        else
        {
                m_ns_href = "";
        }
        return m_ns_href;
}


xmlNodePtr BaseXMLFile::GetFirstElement(const std::string& name)
{
        GetRootElement();
        xmlNodePtr p = GetChildrenNode();
        while (p)
        {
                if (name == GetNodeName())
                {
                        return p;
                }
                p = GetNextNode();
        }
        return NULL;
}


xmlNodePtr BaseXMLFile::GetFirstElement(xmlNodePtr base,const std::string& name)
{
        SetCurrent(base);
        xmlNodePtr p = GetChildrenNode();
        while (p)
        {
                if (name == GetNodeName())
                {
                        return p;
                }
                p = GetNextNode();
        }
        return NULL;
}


xmlNodePtr BaseXMLFile::GetNextElement(xmlNodePtr p,const std::string& name)
{
        SetCurrent(p);
        p = GetNextNode();
        while (p)
        {
                if (name == GetNodeName())
                {
                        return p;
                }
                p = GetNextNode();
        }
        return NULL;
}

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