src/xmldoc.cpp

#include "xmldoc.h"
#include "exceptions.h"

namespace freedaisy {
  XMLDoc::XMLDoc() {
    _xmldoc = NULL;
    createDoc();
  }

  XMLDoc::XMLDoc(std::string filename) {
    _xmldoc = NULL;
    parseFile(filename);
  }

  XMLDoc::~XMLDoc() {
    xmlFreeDoc(_xmldoc);
  }

  void XMLDoc::parseFile(std::string filename) {
    if (_xmldoc != NULL) // If we parse a document after createDoc()
      xmlFreeDoc(_xmldoc);

    _xmldoc = xmlParseFile(filename.c_str());
    if (!_xmldoc) {
      throw Exceptions::XMLException("Failed to load XML file");
    }
  }

  void XMLDoc::saveFile(std::string filename) {
    if (!xmlSaveFormatFile(filename.c_str(), _xmldoc, 1)) {
      throw Exceptions::XMLException("Failed to save XML file");
    }
  }

  void XMLDoc::createDoc() {
    _createDoc();
  }

  void XMLDoc::_createDoc() {
    if (_xmldoc != NULL) // Same this as parseFile()
      xmlFreeDoc(_xmldoc);

    _xmldoc = xmlNewDoc((xmlChar*)"1.0");
    if (!_xmldoc) {
      throw Exceptions::XMLException("Failed to create XML file");
    }
  }

  xmlDocPtr XMLDoc::getC() {
    return _xmldoc;
  }

  std::vector<XMLNode> XMLDoc::xpathEval(std::string request) {
    xmlXPathContextPtr ctx;
    xmlXPathObjectPtr obj;
    xmlNodePtr cur;
    std::vector<XMLNode> vec;
    ctx = xmlXPathNewContext(_xmldoc);
    if (!ctx)
      throw Exceptions::XMLException("Failed to create XPath context");
    obj = xmlXPathEvalExpression((xmlChar*)request.c_str(), ctx);
    if (!obj)
      throw Exceptions::XMLException("Failed to evaluate XPath expression");
    for (int i = 0; i < obj->nodesetval->nodeNr; i++) {
      vec.push_back(obj->nodesetval->nodeTab[i]);
    }
    return vec;
  }

  XMLNode XMLDoc::createRootNode(std::string name) {
    xmlNodePtr rootnode = NULL;
    rootnode = xmlNewTextChild((xmlNodePtr) _xmldoc, NULL, (xmlChar *) name.c_str(), NULL);
    if (!rootnode)
      throw Exceptions::XMLException("Failed to create root node");

    return XMLNode(rootnode);
  }
}

---