C++ node::Ptr类代码示例

	/*
	 * Adds node to routing table
	 */
	bool KBucket::insert(const Node::Ptr& node)
	{
		if(node->isInList)
			return true;	// node is already in the table

		string ip = node->getIdentity().getIp();
		string port = node->getIdentity().getUdpPort();

		// allow only one same IP:port
		bool isAcceptable = (ipMap.find(ip + ":" + port) == ipMap.end());

		if((nodes.size() < (K * ID_BITS)) && isAcceptable)
		{
			nodes.push_back(node);
			node->isInList = true;
			ipMap.insert(ip + ":" + port);

			if(DHT::getInstance())
				DHT::getInstance()->setDirty();

			return true;
		}

		return isAcceptable;
	}

void XercesUpdateFactory::addToPutSet(const Node::Ptr &node, const LocationInfo *location, DynamicContext *context)
{
  Node::Ptr root = node->root(context);

  Sequence docURISeq = root->dmDocumentURI(context);
  const XMLCh *docuri = 0;
  if(!docURISeq.isEmpty()) {
    docuri = docURISeq.first()->asString(context);
  }

  PutItem item(docuri, root, location, context);

  std::pair<PutSet::iterator, bool> res = putSet_.insert(item);
  if(!res.second && !res.first->node->equals(item.node)) {
    if(context->getMessageListener() != 0) {
      context->getMessageListener()->warning(X("In the context of this expression"), res.first->location);
    }

    XMLBuffer buf;
    buf.append(X("Document writing conflict for URI \""));
    buf.append(item.uri);
    buf.append(X("\""));

    XQThrow3(ASTException, X("XercesUpdateFactory::addToPutSet"), buf.getRawBuffer(), location);
  }
}

	/*
	 * Sends request to create connection with me
	 */
	void ConnectionManager::revConnectToMe(const Node::Ptr& node, const AdcCommand& cmd)
	{
		// don't allow connection if we didn't proceed a handshake
		//if(!node->isOnline())
		//	return;

		// this is valid for active-passive connections only
		if(!ClientManager::getInstance()->isActive())
			return;
			
		const string& protocol = cmd.getParam(1);
		const string& token = cmd.getParam(2);

		bool secure;
		if(protocol == CLIENT_PROTOCOL)
		{
			secure = false;
		}
		else if(protocol == SECURE_CLIENT_PROTOCOL_TEST && CryptoManager::getInstance()->TLSOk())
		{
			secure = true;
		}
		else
		{
			AdcCommand sta(AdcCommand::SEV_FATAL, AdcCommand::ERROR_PROTOCOL_UNSUPPORTED, "Protocol unknown", AdcCommand::TYPE_UDP);
			sta.addParam("PR", protocol);
			sta.addParam("TO", token);

			DHT::getInstance()->send(sta, node->getIdentity().getIp(), static_cast<uint16_t>(Util::toInt(node->getIdentity().getUdpPort())), 
				node->getUser()->getCID(), node->getUdpKey());
			return;
		}
		
		connect(node, token, secure);
	}

Sequence FunctionLocalname::createSequence(DynamicContext* context, int flags) const
{
  XPath2MemoryManager* memMgr = context->getMemoryManager();

  Node::Ptr ctxNode;
  if(getNumArgs() == 1) {
    Sequence arg=getParamNumber(1,context)->toSequence(context);
    if(arg.isEmpty())
      return Sequence(context->getItemFactory()->createString(XERCES_CPP_NAMESPACE_QUALIFIER XMLUni::fgZeroLenString, context), memMgr);
    ctxNode=arg.first();
  }
  else {
    const Item::Ptr item = context->getContextItem();
    if(item==NULLRCP)
      XQThrow(FunctionException, X("FunctionLocalName::createSequence"),X("Undefined context item in fn:local-name [err:XPDY0002]"));
    if(!item->isNode())
      XQThrow(FunctionException, X("FunctionLocalName::createSequence"),X("The context item is not a node [err:XPTY0004]"));
    ctxNode=item;
	}

  ATQNameOrDerived::Ptr name = ctxNode->dmNodeName(context);
  if(name.notNull())
    return Sequence(context->getItemFactory()->createString(((const ATQNameOrDerived*)name.get())->getName(), context), memMgr);

  return Sequence(context->getItemFactory()->createString(XERCES_CPP_NAMESPACE_QUALIFIER XMLUni::fgZeroLenString, context), memMgr);
}

Item::Ptr UTransform::TransformResult::next(DynamicContext *context)
{
    context->testInterrupt();

    AutoVariableStoreReset reset(context, &scope_);

    if(toDo_) {
        toDo_ = false;

        NodeSet copiedNodes = NodeSet(nodecompare(context));

        VectorOfCopyBinding::const_iterator end = transform_->getBindings()->end();
        for(VectorOfCopyBinding::const_iterator it = transform_->getBindings()->begin();
                it != end; ++it) {
            if((*it)->qname_ == 0) continue;

            Sequence values = (*it)->expr_->createResult(context)->toSequence(context);

            // Keep a record of the nodes that have been copied
            Result valIt = values;
            Item::Ptr val;
            while((val = valIt->next(context)).notNull()) {
                copiedNodes.insert((Node*)val.get());
            }

            scope_.setVar((*it)->uri_, (*it)->name_, values);
        }

        // Get the pending update list
        PendingUpdateList pul = transform_->getModifyExpr()->createUpdateList(context);

        // Check that the targets of the pending updates are copied nodes
        for(PendingUpdateList::const_iterator i = pul.begin(); i != pul.end(); ++i) {
            Node::Ptr target = i->getTarget();
            while(copiedNodes.find(target) == copiedNodes.end()) {
                target = target->dmParent(context);
                if(target.isNull()) {
                    XQThrow3(StaticErrorException,X("UTransform::staticTyping"),
                             X("The target node of an update expression in the transform expression is not a node from the copy clauses [err:XUDY0014]"), &(*i));
                }
            }
        }

        // Apply the updates
        AutoDelete<UpdateFactory> ufactory(context->createUpdateFactory());
        ufactory->applyUpdates(pul, context, transform_->getRevalidationMode());

        // Execute the return expression
        result_ = transform_->getReturnExpr()->createResult(context);
    }

    Item::Ptr result = result_->next(context);

    if(result.isNull()) {
        result_ = 0;
        return 0;
    }

    return result;
}

PendingUpdateList UInsertAsLast::createUpdateList(DynamicContext *context) const
{
  Node::Ptr node = (Node*)target_->createResult(context)->next(context).get();

  if(node->dmNodeKind() != Node::element_string &&
     node->dmNodeKind() != Node::document_string)
    XQThrow(XPath2TypeMatchException,X("UInsertAsLast::createUpdateList"),
            X("It is a type error for the target expression of an insert as last expression not to be a single element "
              "or document [err:XUTY0005]"));

  Sequence alist(context->getMemoryManager());
  Sequence clist(context->getMemoryManager());

  Result value = source_->createResult(context);
  Item::Ptr item;
  while((item = value->next(context)).notNull()) {
    if(((Node*)item.get())->dmNodeKind() == Node::attribute_string) {
      if(!clist.isEmpty())
        XQThrow(ASTException,X("UInsertAsLast::createUpdateList"),
                X("Attribute nodes must occur before other nodes in the source expression for an insert as last expression [err:XUTY0004]"));

      //    b. No attribute node in $alist may have a QName whose implied namespace binding conflicts with a namespace
      //       binding in the "namespaces" property of $target [err:XUDY0023].  
      ATQNameOrDerived::Ptr qname = ((Node*)item.get())->dmNodeName(context);
      if(qname->getURI() != 0 && *(qname->getURI()) != 0) {
        ATAnyURIOrDerived::Ptr uri = FunctionNamespaceURIForPrefix::uriForPrefix(qname->getPrefix(), node, context, this);
        if(uri.notNull() && !XPath2Utils::equals(uri->asString(context), qname->getURI())) {
          XMLBuffer buf;
          buf.append(X("Implied namespace binding for the insert as last expression (\""));
          buf.append(qname->getPrefix());
          buf.append(X("\" -> \""));
          buf.append(qname->getURI());
          buf.append(X("\") conflicts with those already existing on the parent element of the target attribute [err:XUDY0023]"));
          XQThrow3(DynamicErrorException, X("UInsertInto::createUpdateList"), buf.getRawBuffer(), this);
        }
      }

      alist.addItem(item);
    }
    else
      clist.addItem(item);
  }

  PendingUpdateList result;

  if(!alist.isEmpty()) {
    // 3. If $alist is not empty and into is specified, the following checks are performed:
    //    a. $target must be an element node [err:XUTY0022].
    if(node->dmNodeKind() == Node::document_string)
      XQThrow(XPath2TypeMatchException,X("UInsertInto::createUpdateList"),
              X("It is a type error if an insert expression specifies the insertion of an attribute node into a document node [err:XUTY0022]"));
    result.addUpdate(PendingUpdate(PendingUpdate::INSERT_ATTRIBUTES, node, alist, this));
  }
  if(!clist.isEmpty()) {
    result.addUpdate(PendingUpdate(PendingUpdate::INSERT_INTO_AS_LAST, node, clist, this));
  }

  return result;
}

PendingUpdateList UReplaceValueOf::createUpdateList(DynamicContext *context) const
{
  Node::Ptr node = (Node*)target_->createResult(context)->next(context).get();

  if(node->dmNodeKind() == Node::document_string)
    XQThrow(XPath2TypeMatchException,X("UReplaceValueOf::createUpdateList"),
            X("The target expression of a replace expression does not return a single "
              "node that is not a document node [err:XUTY0008]"));
    
  XMLBuffer buf;
  XQDOMConstructor::getStringValue(expr_, buf, context);

  // If $target is a comment node, and $string contains two adjacent hyphens or ends with a hyphen, a dynamic error is raised [err:XQDY0072].
  if(node->dmNodeKind() == Node::comment_string) {
    bool foundOne = false;
    for(const XMLCh *str = buf.getRawBuffer(); *str; ++str) {
      if(*str == '-') {
        if(foundOne) {
          XQThrow(DynamicErrorException,X("UReplaceValueOf::createUpdateList"),
                  X("The replace value of expression would result in a comment node whose content contains two adjacent hyphens [err:XQDY0072]"));
        }
        else foundOne = true;
      }
      else {
        foundOne = false;
      }
    }

    if(foundOne) {
      XQThrow(DynamicErrorException,X("UReplaceValueOf::createUpdateList"),
              X("The replace value of expression would result in a comment node whose content ends with a hyphen [err:XQDY0072]"));
    }
  }
  // If $target is a processing instruction node, and $string contains the substring "?>", a dynamic error is raised [err:XQDY0026].
  else if(node->dmNodeKind() == Node::processing_instruction_string) {
    bool foundQuestion = false;
    for(const XMLCh *str = buf.getRawBuffer(); *str; ++str) {
      if(*str == '?') {
        foundQuestion = true;
      }
      else {
        if(foundQuestion && *str == '>') {
          XQThrow(DynamicErrorException,X("UReplaceValueOf::createUpdateList"),
                  X("The replace value of expression would result in a processing instruction node whose content includes the string \"?>\" [err:XQDY0026]"));
        }
        foundQuestion = false;
      }
    }
  }

  Item::Ptr value = context->getItemFactory()->createString(buf.getRawBuffer(), context);

  if(node->dmNodeKind() == Node::element_string) {
    return PendingUpdate(PendingUpdate::REPLACE_ELEMENT_CONTENT, node, value, this);
  }
  else {
    return PendingUpdate(PendingUpdate::REPLACE_VALUE, node, value, this);
  }
}

	bool operator()(const Node::Ptr& lhs, const Node::Ptr& rhs)
	{
		auto costFgv1 = lhs->costFgv();
		auto costFgv2 = rhs->costFgv();

		if (costFgv1 == costFgv2) {
			return lhs->time < rhs->time;
		}
		return costFgv1 > costFgv2;
	}

    void ConnectionManager::connect(const Node::Ptr& node, const string& token, bool secure)
    {
        // don't allow connection if we didn't proceed a handshake
        if(!node->isOnline())
        {
            // do handshake at first
            DHT::getInstance()->info(node->getIdentity().getIp(), node->getIdentity().getUdpPort(),
                DHT::PING | DHT::MAKE_ONLINE, node->getUser()->getCID(), node->getUdpKey());
            return;
        }

        bool active = ClientManager::getInstance()->isActive();

        // if I am not active, send reverse connect to me request
        AdcCommand cmd(active ? AdcCommand::CMD_CTM : AdcCommand::CMD_RCM, AdcCommand::TYPE_UDP);
        cmd.addParam(secure ? SECURE_CLIENT_PROTOCOL_TEST : CLIENT_PROTOCOL);

        if(active)
        {
            string port = secure ? dcpp::ConnectionManager::getInstance()->getSecurePort() : dcpp::ConnectionManager::getInstance()->getPort();
            cmd.addParam(port);
        }

        cmd.addParam(token);

        DHT::getInstance()->send(cmd, node->getIdentity().getIp(), node->getIdentity().getUdpPort(),
            node->getUser()->getCID(), node->getUdpKey());
    }

bool SequenceType::ItemType::matchesSchemaElement(const Node::Ptr &toBeTested, const DynamicContext* context) const
{
  // retrieve the type of the element name
  assert(m_pName!=NULL);
  const XMLCh* elementNS=m_NameURI;
  const XMLCh* elementName=m_pName->getName();
  SchemaElementDecl *elemDecl=context->getDocumentCache()->getElementDecl(elementNS, elementName);
  assert(elemDecl != NULL);

  // 1. The name of the candidate node matches the specified ElementName or matches the name of an element in a 
  //    substitution group headed by an element named ElementName.
  ATQNameOrDerived::Ptr name = toBeTested->dmNodeName(context);
  if(name.isNull()) return false;
  const XMLCh *node_uri = ((const ATQNameOrDerived*)name.get())->getURI();
  const XMLCh *node_name = ((const ATQNameOrDerived*)name.get())->getName();

  if(!(XPath2Utils::equals(elementName, node_name)) ||
     !(XPath2Utils::equals(elementNS, node_uri)))
  {
    // the node doesn't match the ElementName; check if it is in its substitution group
    SchemaElementDecl* thisElemDecl=context->getDocumentCache()->getElementDecl(node_uri, node_name);
    if(thisElemDecl==NULL) // the node to be tested has no type info
      return false;

    SchemaElementDecl* rootElemDecl=thisElemDecl->getSubstitutionGroupElem();
    bool foundIt=false;
    while (rootElemDecl)
    {
      if (XPath2Utils::equals(rootElemDecl->getBaseName(), elementName) &&
          XPath2Utils::equals(context->getDocumentCache()->getSchemaUri(rootElemDecl->getURI()), elementNS))
      {
        foundIt = true;
        break;
      }

      rootElemDecl = rootElemDecl->getSubstitutionGroupElem();
    }
    if(!foundIt)
      return false;
  }

  // 2. derives-from(AT, ET) is true, where AT is the type of the candidate node and ET is the type declared for 
  //    element ElementName in the in-scope element declarations.
  ComplexTypeInfo* pTypeInfo=elemDecl->getComplexTypeInfo();
  if(pTypeInfo && !toBeTested->hasInstanceOfType(pTypeInfo->getTypeUri(), pTypeInfo->getTypeLocalName(), context))
    return false;

  // 3. Either the nilled property of the candidate node is false, or the element declaration for ElementName in 
  //    the in-scope element declarations is nillable.
  if(toBeTested->dmNilled(context).get()->isTrue() &&
     !(elemDecl->getMiscFlags() & SchemaSymbols::XSD_NILLABLE))
    return false;
      
  return true;
}

bool BoundFactsCalculator::HasIncomingEdgesFromLowerLevel(int curOrder, vector<Node::Ptr>& curNodes) {
    for (auto nit = curNodes.begin(); nit != curNodes.end(); ++nit) {
        Node::Ptr cur = *nit;
	NodeIterator nbegin, nend;
	cur->ins(nbegin, nend);
	for (; nbegin != nend; ++nbegin)
	    if (analysisOrder[*nbegin] < curOrder) return true;
    }
    return false;

}

bool XercesURIResolver::resolveDocument(Sequence &result, const XMLCh* uri, DynamicContext* context, const QueryPathNode *projection)
{
  Node::Ptr doc;

  // Resolve the uri against the base uri
  const XMLCh *systemId = uri;
  XMLURL urlTmp(context->getMemoryManager());
  if(urlTmp.setURL(context->getBaseURI(), uri, urlTmp)) {
    systemId = context->getMemoryManager()->getPooledString(urlTmp.getURLText());
  } else {
	systemId = context->getMemoryManager()->getPooledString(uri);
  }

  // Check in the cache
  DOMDocument *found = _documentMap.get((void*)systemId);

  // Check to see if we can locate and parse the document
  if(found == 0) {
    try {
      doc = const_cast<DocumentCache*>(context->getDocumentCache())->loadDocument(uri, context, projection);

      found = (DOMDocument*)((DOMNode*)doc->getInterface(XercesConfiguration::gXerces));

      _documentMap.put((void*)systemId, found);
      _uriMap.put((void*)found, const_cast<XMLCh*>(systemId));
    }
    catch(const XMLParseException& e) {
      XMLBuffer errMsg;
      errMsg.set(X("Error parsing resource: "));
      errMsg.append(uri);
      errMsg.append(X(". Error message: "));
      errMsg.append(e.getError());
      errMsg.append(X(" [err:FODC0002]"));
      XQThrow2(XMLParseException,X("XercesContextImpl::resolveDocument"), errMsg.getRawBuffer());
    }
  }
  else {
    doc = new XercesNodeImpl(found, (XercesURIResolver*)context->getDefaultURIResolver());
  }

  if(doc.notNull()) {
    result.addItem(doc);
    return true;
  }

  XMLBuffer errMsg;
  errMsg.set(X("Error retrieving resource: "));
  errMsg.append(uri);
  errMsg.append(X(" [err:FODC0002]"));
  XQThrow2(XMLParseException,X("XercesContextImpl::resolveDocument"), errMsg.getRawBuffer());

  return false;
}

void DbXmlUpdateFactory::applyInsertBefore(const PendingUpdate &update, DynamicContext *context)
{
	const DbXmlNodeImpl *next = (const DbXmlNodeImpl*)update.getTarget().get();
	if (!next->isUpdateAble())
		return;
	Node::Ptr parent = next->dmParent(context);
	NsDomNodeRef nextRef = next->getNsDomNode();
	applyInserts(update,
		     (const DbXmlNodeImpl *)parent->getInterface(DbXmlNodeImpl::gDbXml),
		     nextRef.get(),
		     context,
                     false);
}

static
std::string
getDotLabel(Node::Ptr node)
{
    if (node)
    {
        return node->name() == "unnamed" || node->name().find("AutoName$") != std::string::npos
            ? "\"\""
            : "\"" + node->name() + "\"";
    }
    else
        return "\"\"";
}

void DbXmlUpdateFactory::applyReplaceNode(const PendingUpdate &update, DynamicContext *context)
{
	const DbXmlNodeImpl *target = (const DbXmlNodeImpl*)update.getTarget().get();
	if (!target->isUpdateAble())
		return;
	Node::Ptr parent = target->dmParent(context);
	// insert all new nodes *before* the target, then
	// mark target for deletion
	NsDomNodeRef targetRef = target->getNsDomNode();
	applyInserts(update,
		     (const DbXmlNodeImpl *)parent->getInterface(DbXmlNodeImpl::gDbXml),
		     targetRef.get(),
		     context, false);
	forDeletion_.insert(target);
}