C++ Ptr::get方法代码示例

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;
}

Numeric::Ptr NumericFunction::getNumericParam(unsigned int number, DynamicContext *context, int flags) const
{
  Result arg = XQFunction::getParamNumber(number, context, flags);
  Item::Ptr item = arg->next(context);

  if(item.isNull()) {
    return 0;
  }
  else if(item->isAtomicValue() && ((const AnyAtomicType *)item.get())->isNumericValue()) {
    return (const Numeric *)item.get();
  } else {
    XQThrow(FunctionException,X("NumericFunction::getParamNumber"), X("Non-numeric argument in numeric function [err:XPTY0004]"));
  }
}

Item::Ptr XQCastAs::CastAsResult::getSingleResult(DynamicContext *context) const
{
  // The semantics of the cast expression are as follows:
  //    1. Atomization is performed on the input expression.
  Result toBeCasted(_di->getExpression()->createResult(context));

  const Item::Ptr first = toBeCasted->next(context);

  if(first == NULLRCP) {
    //    3. If the result of atomization is an empty sequence:
    //       1. If ? is specified after the target type, the result of the cast expression is an empty sequence.
    //       2. If ? is not specified after the target type, a type error is raised [err:XPTY0004].
    if(_di->getSequenceType()->getOccurrenceIndicator() == SequenceType::EXACTLY_ONE) {
      XQThrow(TypeErrorException,X("XQCastAs::CastAsResult::getSingleResult"),
              X("The input to a non-optional cast as expression is an empty sequence [err:XPTY0004]"));
    }
    else {
      return 0;
    }
  }

  const Item::Ptr second = toBeCasted->next(context);

  //    2. If the result of atomization is a sequence of more than one atomic value, a type error is raised.[err:XPTY0004]
  if(second != NULLRCP) {
    XQThrow(TypeErrorException,X("XQCastAs::CastAsResult::getSingleResult"),
            X("The input to a cast as expression is more than one atomic value [err:XPTY0004]"));
  }

  //    4. If the result of atomization is a single atomic value, the result of the cast expression depends on the input type and the target type.
  //       The normative definition of these rules is given in [XQuery 1.0 and XPath 2.0 Functions and Operators].
  return _di->cast((const AnyAtomicType*)first.get(), context);
}

Item::Ptr AtomizeResult::next(DynamicContext *context)
{
  // for $item in (Expr) return
  //   typeswitch ($item)
  //     case $value as atomic value return $value
  //     default $node return fn:data($node)

  Item::Ptr result = _sub->next(context);
  while(result.isNull()) {
    _sub = 0;
    result = _parent->next(context);
    if(result.isNull()) {
      _parent = 0;
      return 0;
    }
    if(result->isNode()) {
      _sub = ((Node*)result.get())->dmTypedValue(context);
      result = _sub->next(context);
    }
    else if(result->isFunction()) {
      XMLBuffer buf;
      buf.set(X("Sequence does not match type (xs:anyAtomicType | node())*"));
      buf.append(X(" - found item of type "));
      result->typeToBuffer(context, buf);
      buf.append(X(" [err:XPTY0004]"));
      XQThrow(XPath2TypeMatchException, X("AtomizeResult::next"), buf.getRawBuffer());
    }
  }
  return result;
}

Item::Ptr PromoteAnyURIResult::next(DynamicContext *context)
{
  Item::Ptr item = parent_->next(context);
  if(item.notNull()) {
    assert(item->isAtomicValue());
    const AnyAtomicType *atomic = (const AnyAtomicType *)item.get();

    // 4. For each item of type xs:anyURI in the atomic sequence that can be promoted to the expected atomic
    //    type using URI promotion as described in B.1 Type Promotion, the promotion is done.
    if(atomic->getPrimitiveTypeIndex() == AnyAtomicType::ANY_URI) {
      try {
        item = atomic->castAs(AnyAtomicType::STRING, context);
      } catch (XPath2TypeCastException &e) {
        XQThrow(XPath2ErrorException, X("SequenceType::AtomicTypeConvertFunctionArgResult::next"),
                 X("AnyURI type promotion failed (for promotable type)"));
      } catch (const XMLException& e) {
        XQThrow(XPath2ErrorException, X("SequenceType::AtomicTypeConvertFunctionArgResult::next"),
                 X("AnyURI type promotion failed (for promotable type)"));
      }
    }
  }
  else {
    parent_ = 0;
  }

  return item;
}

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;
}

EventGenerator::Ptr XQCopy::generateEventsImpl(const Item::Ptr &toBeCopied, EventHandler *events, DynamicContext *context,
                                               bool preserveNS, bool preserveType) const
{
  if(!toBeCopied->isNode()) {
    toBeCopied->generateEvents(events, context, preserveNS, preserveType);
    return 0;
  }

  Node *node = (Node*)toBeCopied.get();

  if(node->dmNodeKind() == Node::element_string) {
    NoInheritFilter niFilter(events, context->getMemoryManager());
    if(!inheritNamespaces_) events = &niFilter;

    AnyAtomicType::Ptr itemName = node->dmNodeName(context);
    const ATQNameOrDerived *pQName = (const ATQNameOrDerived*)itemName.get();
    const XMLCh *prefix = emptyToNull(pQName->getPrefix());
    const XMLCh *uri = emptyToNull(pQName->getURI());
    const XMLCh *localname = pQName->getName();

    events->startElementEvent(prefix, uri, localname);

    ElemConstructFilter elemFilter(events, this, context->getMemoryManager());

    if(copyNamespaces_) {
      Result nsnodes = node->dmNamespaceNodes(context, this);
      Item::Ptr ns;
      while((ns = nsnodes->next(context)).notNull()) {
        ns->generateEvents(&elemFilter, context, preserveNS, preserveType);
      }
    }

    for(VectorOfASTNodes::const_iterator itCont = children_.begin(); itCont != children_.end (); ++itCont) {
      (*itCont)->generateAndTailCall(&elemFilter, context, preserveNS, preserveType);
    }

    // TBD validation and type - jpcs
    const XMLCh *typeURI = SchemaSymbols::fgURI_SCHEMAFORSCHEMA;
    const XMLCh *typeName = DocumentCache::g_szUntyped;

    events->endElementEvent(prefix, uri, localname, typeURI, typeName);
  }
  else if(node->dmNodeKind() == Node::document_string) {
    events->startDocumentEvent(0, 0);

    DocConstructFilter filter(events, this);

    for(VectorOfASTNodes::const_iterator itCont = children_.begin(); itCont != children_.end (); ++itCont) {
      (*itCont)->generateAndTailCall(&filter, context, preserveNS, preserveType);
    }

    events->endDocumentEvent();
  }
  else {
    node->generateEvents(events, context, preserveNS, preserveType);
  }

  return 0;
}

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

  Item::Ptr arg = getParamNumber(1, context)->next(context);
  if(arg.isNull()) return Sequence(memMgr);

  return Sequence(((const ATDateTimeOrDerived*)arg.get())->getMinutes(context), memMgr);
}

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

  Item::Ptr arg = getParamNumber(1,context)->next(context);
  if(arg.isNull())
    return Sequence(context->getItemFactory()->createString(XMLUni::fgZeroLenString, context), mm);

  return Sequence(FunctionString::string_item(((Node*)arg.get())->dmNodeName(context), context), mm);
}

PendingUpdateList UDelete::createUpdateList(DynamicContext *context) const
{
  PendingUpdateList pul;

  Result targets = expr_->createResult(context);
  Item::Ptr item;
  while((item = targets->next(context)).notNull()) {
    pul.addUpdate(PendingUpdate(PendingUpdate::PUDELETE, (Node*)item.get(), this));
  }

  return pul;
}

bool SequenceType::ItemType::matchesNameType(const Item::Ptr &toBeTested, const DynamicContext* context) const
{
  // Check name constraint
  if(m_pName) {
    if(toBeTested->isNode()) {
      ATQNameOrDerived::Ptr name = ((const Node*)(const Item*)toBeTested)->dmNodeName(context);
      if(name.isNull()) return false;

      // Match node name
      if(!(XPath2Utils::equals(m_pName->getName(), ((const ATQNameOrDerived*)name.get())->getName())))
        return false;

      // Match node uri
      if(!(XPath2Utils::equals(m_NameURI, ((const ATQNameOrDerived*)name.get())->getURI())))
        return false;
    }
    else return false;
  }

  //A named atomic type matches a value if the dynamic type of the
  //value is the same as the named atomic type or is derived from the
  //named atomic type by restriction. For example, the ItemType
  //xs:decimal matches the value 12.34 (a decimal literal); it also
  //matches a value whose dynamic type is shoesize, if shoesize is an
  //atomic type derived from xs:decimal.

  if(m_pType) {
    if(toBeTested->isAtomicValue()) {
      return ((AnyAtomicType*)toBeTested.get())->isInstanceOfType(m_TypeURI, m_pType->getName(), context);
    } else if (toBeTested->isNode()) {
      return ((Node*)toBeTested.get())->hasInstanceOfType(m_TypeURI, m_pType->getName(), context);
    }
    return false;
  }

  return true;
}

bool SequenceType::ItemType::matches(const Item::Ptr &toBeTested, DynamicContext* context) const
{
  if(toBeTested->isNode())
    return matches((const Node::Ptr)toBeTested, context);
    
  switch(m_nTestType) {
    case TEST_ELEMENT:
    case TEST_ATTRIBUTE:
    case TEST_SCHEMA_ELEMENT:
    case TEST_SCHEMA_ATTRIBUTE:
    case TEST_NODE:
    case TEST_PI:
    case TEST_COMMENT:
    case TEST_TEXT:
    case TEST_DOCUMENT:
    case TEST_SCHEMA_DOCUMENT:
    {
      return false;
    }
    
    case TEST_ANYTHING:
    {
      return true;
    }

    case TEST_ATOMIC_TYPE:
    {
      if(!toBeTested->isAtomicValue()) return false;
      return matchesNameType(toBeTested, context);
    }

    case TEST_FUNCTION:
    {
      if(!toBeTested->isFunction()) return false;
      if(returnType_ == 0) return true;

      FunctionRef *func = (FunctionRef*)toBeTested.get();
      if(func->getNumArgs() != argTypes_->size()) return false;

      return true;
    }

  }
  return true;
}

  Item::Ptr next(DynamicContext *context)
  {
    Item::Ptr result;
    while((result = stepResult_->next(context)).isNull()) {
      context->testInterrupt();

      Item::Ptr item = parent_->next(context);

      if(item.isNull()) {
        return 0;
      }
      if(!item->isNode()) {
        XQThrow(TypeErrorException,X("StepResult::next"), X("An attempt was made to perform an axis step when the Context Item was not a node [err:XPTY0020]"));
      }

      stepResult_ = ((Node*)item.get())->getAxisResult(step_->getAxis(), step_->getNodeTest(), context, this);
    }

    return result;
  }

bool XQLiteral::isDateOrTimeAndHasNoTimezone(StaticContext *context) const
{
  switch(primitiveType_) {
  case AnyAtomicType::DATE:
  case AnyAtomicType::DATE_TIME:
  case AnyAtomicType::TIME:
  case AnyAtomicType::G_DAY:
  case AnyAtomicType::G_MONTH:
  case AnyAtomicType::G_MONTH_DAY:
  case AnyAtomicType::G_YEAR:
  case AnyAtomicType::G_YEAR_MONTH: {
    if(context == 0) return true;
    AutoDelete<DynamicContext> dContext(context->createDynamicContext());
    dContext->setMemoryManager(context->getMemoryManager());
    Item::Ptr item = dContext->getItemFactory()->createDerivedFromAtomicType(primitiveType_, typeURI_, typeName_, value_, dContext);
    return !((const DateOrTimeType*)item.get())->hasTimezone();
  }
  default: break;
  }

  return false;
}