Attribute.h

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//
// Copyright (c) 2009, Markus Rickert
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
 
#ifndef _RL_XML_ATTRIBUTE_H_
#define _RL_XML_ATTRIBUTE_H_
 
#include <string>
#include <boost/shared_array.hpp>
#include <libxml/parser.h>
 
namespace rl
{
    namespace xml
    {
        class Attribute
        {
        public:
            Attribute(xmlAttrPtr attr) :
                attr(attr)
            {
            }
            
            Attribute(xmlNodePtr node, const ::std::string& name, const ::std::string& value) :
                attr(
                    xmlNewProp(
                        node,
                        reinterpret_cast< const xmlChar* >(name.c_str()),
                        reinterpret_cast< const xmlChar* >(value.c_str())
                    )
                )
            {
            }
            
            virtual ~Attribute()
            {
                if (NULL == this->attr->doc)
                {
                    xmlFreeProp(this->attr);
                }
            }
            
            ::std::string getValue() const
            {
                ::boost::shared_array< xmlChar > value(
                    xmlGetProp(
                        this->attr->parent,
                        this->attr->name
                    ),
                    xmlFree
                );
                
                return reinterpret_cast< char* >(value.get());
            }
            
            xmlAttrPtr operator()() const
            {
                return this->attr;
            }
            
            void remove()
            {
                xmlRemoveProp(this->attr);
            }
            
            void setValue(const ::std::string& value)
            {
                xmlSetProp(
                    this->attr->parent,
                    this->attr->name,
                    reinterpret_cast< const xmlChar* >(value.c_str())
                );
            }
            
        protected:
            
        private:
            xmlAttrPtr attr;
        };
    }
}
 
#endif // _RL_XML_ATTRIBUTE_H_