C++ Element::appendChild方法代码示例

void DebugBreakpointManager::SaveState(const Poco::Path& path) const
{
  Poco::XML::Document* doc = new Poco::XML::Document();
  Poco::XML::Element* breakpoints = doc->createElement(BREAKPOINTS_TAG);
  doc->appendChild(breakpoints)->release();

  for (std::set<unsigned long>::const_iterator i = m_ObjectBreakpoints.begin(); i
      != m_ObjectBreakpoints.end(); ++i)
  {
    Poco::XML::Element* objectBreakpoint = doc->createElement(OBJECT_TAG);
    breakpoints->appendChild(objectBreakpoint)->release();
    std::stringstream ss;
    ss << *i;
    objectBreakpoint->setAttribute(ID_ATTR, ss.str());

    const Object* obj = DebugUtil::GetObject(*i);
    if (obj)
    {
      objectBreakpoint->setAttribute(CLASSNAME_ATTR, obj->GetClassName());

    }
  }

  for (Poco::HashMap<int, const Object*>::ConstIterator i =
      m_SmartPointerBreakpoints.begin(); i != m_SmartPointerBreakpoints.end(); ++i)
  {
    Poco::XML::Element* spBreakpoint = doc->createElement(SMARTPOINTER_TAG);
    breakpoints->appendChild(spBreakpoint)->release();
    std::stringstream ss;
    ss << i->first;
    spBreakpoint->setAttribute(ID_ATTR, ss.str());

    const Object* obj = i->second;
    if (i->second)
    {
      spBreakpoint->setAttribute(CLASSNAME_ATTR, obj->GetClassName());
      ss.clear();
      ss << obj->GetTraceId();
      spBreakpoint->setAttribute(OBJECTID_ATTR, ss.str());
    }
  }

  Poco::FileOutputStream writer(path.toString());
  Poco::XML::DOMWriter out;
  out.setOptions(3); //write declaration and pretty print
  out.writeNode(writer, doc);

  doc->release();
}

void DebugUtil::SaveState()
{
    Poco::Path path;
    if (!GetPersistencePath(path)) return;

    path.setFileName(DEBUG_UTIL_XML);

    Poco::XML::Document* doc = new Poco::XML::Document();
    Poco::XML::Element* debugutil = doc->createElement(DEBUGUTIL_TAG);
    doc->appendChild(debugutil)->release();

    for (std::set<unsigned int>::const_iterator i = m_TracedObjects.begin();
            i != m_TracedObjects.end(); ++i)
    {
        Poco::XML::Element* traceObject = doc->createElement(TRACEOBJECT_TAG);
        debugutil->appendChild(traceObject)->release();
        std::stringstream ss;
        ss << *i;
        traceObject->setAttribute(ID_ATTR, ss.str());
    }

    for (std::set<std::string>::const_iterator i = m_TracedClasses.begin();
            i != m_TracedClasses.end(); ++i)
    {
        Poco::XML::Element* traceClass = doc->createElement(TRACECLASS_TAG);
        debugutil->appendChild(traceClass)->release();
        traceClass->setAttribute(NAME_ATTR, *i);
    }

    try
    {
        Poco::FileOutputStream writer(path.toString());
        Poco::XML::DOMWriter out;
        out.setOptions(3); //write declaration and pretty print
        out.writeNode(writer, doc);

        doc->release();

        // save BreakpointManager
        path.setFileName(DebugBreakpointManager::BREAKPOINTS_XML);
        GetBreakpointManager()->SaveState(path);
    }
    catch (Poco::FileException& e)
    {
        BERRY_WARN << e.displayText();
    }

}

bool ofXml::setValue(const string& path, const string& value)
{
    Poco::XML::Element *e;
    if(element) {
        e = (Poco::XML::Element*) element->getNodeByPath(path);
    } else {
        ofLogWarning("ofXml") << "setValue(): no element set yet";
        return false;
    }
    
    if(!e) {
        ofLogWarning("ofXml") <<  "setValue(): path \"" + path + "\" doesn't exist";
        return false;
    }
    
    if(!e->firstChild()){
    	Poco::XML::Text *node = getPocoDocument()->createTextNode(ofToString(value));
    	e->appendChild(node);
    	node->release();
        return true;
    }

    if(e->firstChild()->nodeType() == Poco::XML::Node::TEXT_NODE) {
        Poco::XML::Text *node = getPocoDocument()->createTextNode(ofToString(value));
        e->replaceChild( (Poco::XML::Node*) node, e->firstChild()); // swap out
        node->release();
        return true;
    }else{
    	return false;
    }
}

bool ofXml::addChild( const string& path )
{
    vector<string> tokens;
    
    if(path.find('/') != string::npos) {
        tokens = tokenize(path, "/");
    }
    
    // is this a tokenized tag?
    if(tokens.size() > 1) 
    {
        // don't 'push' down into the new nodes
        Poco::XML::Element *el = element;
        
        vector<Poco::XML::Element*> toBeReleased;
        
		for(std::size_t i = 0; i < tokens.size(); i++)
        {
            Poco::XML::Element *pe = getPocoDocument()->createElement(tokens.at(i));
            el->appendChild(pe);
            toBeReleased.push_back(pe);
            el = pe;
        }
        
        if(element) {
            element->appendChild(el);
        } else {
            element = el;
        }

        return true;
        
    } else {
        Poco::XML::Element* pe = getPocoDocument()->createElement(path);
        
        if(element) {
            element->appendChild(pe);
        } else {
            document->appendChild(pe);
            element = document->documentElement();
        }
    }
    return true;
}

//---------------------------------------------------------
bool ofXml::setAttribute(const string& path, const string& value)
{
    
    string attributeName, pathToAttribute;
    bool hasPath = false;

    // you can pass either /node[@attr] or just attr
    if(path.find("[@") != string::npos)
    {
        size_t attrBegin = path.find("[@");
        size_t start = attrBegin + 2;
        size_t end = path.find("]", start);
        attributeName = path.substr( start, end - start );
        pathToAttribute = path.substr(0, attrBegin);
        hasPath = true;
    }
    else
    {
        attributeName = path;
    }
    
    // we don't have a path to resolve
    Poco::AutoPtr<Poco::XML::Attr> attr = getPocoDocument()->createAttribute(attributeName);
    attr->setValue(value);
    
    if(!hasPath) {
        Poco::AutoPtr<Poco::XML::NamedNodeMap> map = element->attributes();
        map->setNamedItem(attr);
        return true; // and we're done
    }
    
    // we have a path to resolve
    Poco::XML::Element* curElement = getPocoElement(pathToAttribute);
    
    if(!curElement) { // if it doesn't exist
        
        vector<string> tokens;
        
        if(path.find('/') != string::npos) {
            tokens = tokenize(pathToAttribute, "/");
        }
        
        // is this a tokenized tag?
        if(tokens.size() > 1) 
        {
            // don't 'push' down into the new nodes
            curElement = element;
            
            // find the last existing tag
            size_t lastExistingTag = 0;
            
            // can't use reverse_iterator b/c accumulate doesn't like it
            for(vector<string>::iterator it = tokens.end(); it != tokens.begin(); it--) 
            {
                string empty = "";
                string concat = accumulate(tokens.begin(), it, std::string());
                Poco::XML::Element* testElement = getPocoElement(concat);
                if(testElement) {
                    lastExistingTag++;
                    curElement = testElement;
                    break;
                }
            }
            
            // create all the tags that don't exist
			for(size_t i = lastExistingTag; i < tokens.size(); i++)
            {
                Poco::XML::Element *newElement = getPocoDocument()->createElement(tokens.at(i));
                curElement->appendChild(newElement);
                curElement = newElement;
                
            }
            
            curElement->setAttribute(attributeName, value);
            return true;
        }
        else
        {
            Poco::XML::Element* testElement = getPocoElement(pathToAttribute);
            if(testElement)
            {
                curElement = testElement;
            }
            else
            {
                Poco::XML::Element *newElement = getPocoDocument()->createElement(pathToAttribute);
                curElement->appendChild(newElement);
                curElement = newElement;
            }
            
            curElement->setAttribute(attributeName, value);
            return true;
        }
    }
    return false;
}