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XMLNode.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_XMLNODE_HPP
#define SP_GXML_XMLNODE_HPP

// STDC++
#include <string>

// C libraries
#include <libxslt/xsltInternals.h>
#include <libxml/xpath.h>
#include <libxml/tree.h>

namespace SP {
namespace GXML {

class XMLNode
{
public:
        XMLNode();
        XMLNode( const xmlNodePtr node );
        ~XMLNode();

        enum Exceptions
        {
                NO_NODE=1,        // NodePtr is NULL
                LAST_NODE,        // node has no following sibling
                FIRST_NODE,       // node has no preceding sibling
                DOC_NODE,         // node is document node (has no parent)
                NO_CHILD,         // node has no children
                NO_CONTENT,       // node has no content (no child text-node)
                NO_ATTRIBUTES,    // node has no attributes
                NO_VALUE          // attribute has no value (should never happen)
        };
        // XMLTree getDoc(); makes no sense till there is a doc-object
        // hint:
        // EVERY group of spcaes or characters is contained within a invisible
        // text-node.
        // i.e. <node/>  <node/> expands to <node/><text>  </text><node/>
        // return next node in order (every space between tags is a text node!)
        // throws LAST_NODE if no following sibling exists
        XMLNode getNext();
        // return previous node in order
        // throws FIRST_NODE if no preceding sibling exists
        XMLNode getPrev();
        // return parent of current node
        // throws DOC_NODE if no parent exists
        XMLNode getParent();
        // return first child of node (text-node if node has content)
        // throws
        XMLNode getChild();
        // return last child of node
        XMLNode getLast();

        // return node type (i.e. XML_ELEMENT_NODE, XML_ATTRIBUTE_NODE,
        // XML_TEXT_NODE, ... )
        int getType();
        // return name of node-tag
        std::string getName();
        // return content of node (which is the content of the first child text-node)
        std::string getContent();
        // return attribute value by name
        std::string getAttribute( const std::string& name );
        // XMLAttributeSet getAttributeSet( XMLNode* node );

        // returns XML subtree of node
        std::string getNodeDump();

        xmlNodePtr getNodePtr();

private:
        xmlNodePtr node_;
};

}}
#endif

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