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XMLConfiguration.cpp

//
// XMLConfiguration.cpp
//
// $Id: //poco/1.2/Util/src/XMLConfiguration.cpp#1 $
//
// Library: Util
// Package: Configuration
// Module:  XMLConfiguration
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/Util/XMLConfiguration.h"
#include "Poco/SAX/InputSource.h"
#include "Poco/DOM/DOMParser.h"
#include "Poco/DOM/Element.h"
#include "Poco/DOM/Attr.h"
#include "Poco/Exception.h"
#include "Poco/NumberParser.h"
#include "Poco/NumberFormatter.h"
#include <set>


namespace Poco {
namespace Util {


XMLConfiguration::XMLConfiguration()
{
}


00057 XMLConfiguration::XMLConfiguration(Poco::XML::InputSource* pInputSource)
{
      load(pInputSource);
}


00063 XMLConfiguration::XMLConfiguration(std::istream& istr)
{
      load(istr);
}


00069 XMLConfiguration::XMLConfiguration(const std::string& path)
{
      load(path);
}


00075 XMLConfiguration::XMLConfiguration(const Poco::XML::Document* pDocument)
{
      load(pDocument);
}

      
00081 XMLConfiguration::XMLConfiguration(const Poco::XML::Node* pNode)
{
      load(pNode);
}


XMLConfiguration::~XMLConfiguration()
{
}


00092 void XMLConfiguration::load(Poco::XML::InputSource* pInputSource)
{
      poco_check_ptr (pInputSource);
      
      Poco::XML::DOMParser parser;
      parser.setFeature(Poco::XML::XMLReader::FEATURE_NAMESPACES, false);
      parser.setFeature(Poco::XML::DOMParser::FEATURE_WHITESPACE, true);
      Poco::XML::AutoPtr<Poco::XML::Document> pDoc = parser.parse(pInputSource);
      load(pDoc);
}


00104 void XMLConfiguration::load(std::istream& istr)
{
      Poco::XML::InputSource src(istr);
      load(&src); 
}


00111 void XMLConfiguration::load(const std::string& path)
{
      Poco::XML::InputSource src(path);
      load(&src); 
}

      
00118 void XMLConfiguration::load(const Poco::XML::Document* pDocument)
{
      poco_check_ptr (pDocument);
      
      _pDocument = Poco::XML::AutoPtr<Poco::XML::Document>(const_cast<Poco::XML::Document*>(pDocument), true);
      _pRoot     = Poco::XML::AutoPtr<Poco::XML::Node>(pDocument->documentElement(), true);
}


00127 void XMLConfiguration::load(const Poco::XML::Node* pNode)
{
      poco_check_ptr (pNode);

      if (pNode->nodeType() == Poco::XML::Node::DOCUMENT_NODE)
      {
            load(static_cast<const Poco::XML::Document*>(pNode));
      }
      else
      {
            _pDocument = Poco::XML::AutoPtr<Poco::XML::Document>(pNode->ownerDocument(), true);
            _pRoot     = Poco::XML::AutoPtr<Poco::XML::Node>(const_cast<Poco::XML::Node*>(pNode), true);
      }
}


00143 bool XMLConfiguration::getRaw(const std::string& key, std::string& value) const
{
      const Poco::XML::Node* pNode = findNode(key);
      if (pNode)
      {
            value = pNode->innerText();
            return true;
      }
      else return false;
}


00155 void XMLConfiguration::setRaw(const std::string& key, const std::string& value)
{
      throw Poco::NotImplementedException("Setting a property in an XMLConfiguration");
}


void XMLConfiguration::enumerate(const std::string& key, Keys& range) const
{
      using Poco::NumberFormatter;
      
      std::multiset<std::string> keys;
      const Poco::XML::Node* pNode = findNode(key);
      if (pNode)
      {
            const Poco::XML::Node* pChild = pNode->firstChild();
            while (pChild)
            {
                  if (pChild->nodeType() == Poco::XML::Node::ELEMENT_NODE)
                  {
                        const std::string& nodeName = pChild->nodeName();
                        int n = (int) keys.count(nodeName);
                        if (n)
                              range.push_back(nodeName + "[" + NumberFormatter::format(n) + "]");
                        else
                              range.push_back(nodeName);
                        keys.insert(nodeName);
                  }
                  pChild = pChild->nextSibling();
            }
      }
}


const Poco::XML::Node* XMLConfiguration::findNode(const std::string& key) const
{
      std::string::const_iterator it = key.begin();
      return findNode(it, key.end(), _pRoot);
}


const Poco::XML::Node* XMLConfiguration::findNode(std::string::const_iterator& it, const std::string::const_iterator& end, const Poco::XML::Node* pNode)
{
      if (pNode && it != end)
      {
            if (*it == '[')
            {
                  ++it;
                  if (it != end && *it == '@')
                  {
                        ++it;
                        std::string attr;
                        while (it != end && *it != ']') attr += *it++;
                        if (it != end) ++it;
                        return findAttribute(attr, pNode);
                  }
                  else
                  {
                        std::string index;
                        while (it != end && *it != ']') index += *it++;
                        if (it != end) ++it;
                        return findNode(it, end, findElement(Poco::NumberParser::parse(index), pNode));
                  }
            }
            else
            {
                  while (it != end && *it == '.') ++it;
                  std::string key;
                  while (it != end && *it != '.' && *it != '[') key += *it++;
                  return findNode(it, end, findElement(key, pNode));
            }
      }
      else return pNode;
}


const Poco::XML::Node* XMLConfiguration::findElement(const std::string& name, const Poco::XML::Node* pNode)
{
      const Poco::XML::Node* pChild = pNode->firstChild();
      while (pChild)
      {
            if (pChild->nodeType() == Poco::XML::Node::ELEMENT_NODE && pChild->nodeName() == name)
                  return pChild;
            pChild = pChild->nextSibling();
      }
      return 0;
}


const Poco::XML::Node* XMLConfiguration::findElement(int index, const Poco::XML::Node* pNode)
{
      const Poco::XML::Node* pRefNode = pNode;
      if (index > 0)
      {
            pNode = pNode->nextSibling();
            while (pNode)
            {
                  if (pNode->nodeName() == pRefNode->nodeName())
                  {
                        if (--index == 0) break;
                  }
                  pNode = pNode->nextSibling();
            }
      }
      return pNode;
}


const Poco::XML::Node* XMLConfiguration::findAttribute(const std::string& name, const Poco::XML::Node* pNode)
{
      const Poco::XML::Element* pElem = dynamic_cast<const Poco::XML::Element*>(pNode);
      if (pElem)
            return pElem->getAttributeNode(name);
      else
            return 0;
}


} } // namespace Poco::Util

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