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C++ Ptr::isNull方法代码示例

本文整理汇总了C++中item::Ptr::isNull方法的典型用法代码示例。如果您正苦于以下问题:C++ Ptr::isNull方法的具体用法?C++ Ptr::isNull怎么用?C++ Ptr::isNull使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在item::Ptr的用法示例。


在下文中一共展示了Ptr::isNull方法的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: next

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;
}
开发者ID:kanbang,项目名称:Colt,代码行数:30,代码来源:XQAtomize.cpp

示例2: reset

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;
}
开发者ID:kanbang,项目名称:Colt,代码行数:60,代码来源:UTransform.cpp

示例3: createSequence

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

  // If the value of $operand1 is the empty sequence, the empty sequence is returned.
  Item::Ptr inputString = getParamNumber(1,context)->next(context);
  if(inputString.isNull())
    return Sequence(memMgr);

  const XMLCh *input=inputString->asString(context);
  AutoDeallocate<XMLCh> buf(UnicodeTransformer::sentences(input, memMgr), memMgr);

  XMLCh* rb = buf.get();
  XMLCh* start = NULL;
  Sequence resultSeq(0, memMgr);

  // Build sequence
  for (int i = 0; rb[i]; i++) {
    if (rb[i] != UTF8PROC_SB_MARK)
      continue;

    rb[i] = 0;
    if (rb[i+1] == 0 || rb[i+1] != UTF8PROC_SB_MARK) {
      if (start != NULL)
        resultSeq.addItem(context->getItemFactory()->createString(start, context));
      start = rb + (i+1);
    }
  }

  return resultSeq;
}
开发者ID:xubingyue,项目名称:xqilla,代码行数:31,代码来源:FunctionSentences.cpp

示例4: createSequence

Sequence FunctionDoc::createSequence(DynamicContext* context, int flags) const
{
  Item::Ptr uriArg = getParamNumber(1,context)->next(context);
  
  if(uriArg.isNull()) {
    return Sequence(context->getMemoryManager());
  }
  
  const XMLCh *uri = uriArg->asString(context);

  // on Windows, we can have URIs using \ instead of /; let's normalize them
  if(uri != 0) {
    unsigned int len = XPath2Utils::uintStrlen(uri);
    AutoDeleteArray<XMLCh> newURI(new XMLCh[len + 1]);

    const XMLCh *src = uri;
    XMLCh *dst = newURI;
    while(*src != 0) {
      if(*src == '\\') *dst = '/';
      else *dst = *src;

      ++src; ++dst;
    }
    *dst = 0;

    uri = context->getMemoryManager()->getPooledString(newURI);
  }

  if(!XPath2Utils::isValidURI(uri, context->getMemoryManager()))
    XQThrow(FunctionException, X("FunctionDoc::createSequence"), X("Invalid argument to fn:doc function [err:FODC0005]"));

  return context->resolveDocument(uri, this, context->getProjection() ? queryPathTree_ : 0);
}
开发者ID:kanbang,项目名称:Colt,代码行数:33,代码来源:FunctionDoc.cpp

示例5: result

Result XQContextItem::result(DynamicContext *context, const LocationInfo *info)
{
  const Item::Ptr item = context->getContextItem();
  if(item.isNull()) {
    XQThrow3(DynamicErrorException,X("XQContextItem::result"),
             X("It is an error for the context item to be undefined when using it [err:XPDY0002]"), info);
  }
  return item;
}
开发者ID:xubingyue,项目名称:xqilla,代码行数:9,代码来源:XQContextItem.cpp

示例6: createSequence

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);
}
开发者ID:xubingyue,项目名称:xqilla,代码行数:9,代码来源:FunctionMinutesFromDateTime.cpp

示例7: createResult

Result XQContextItem::createResult(DynamicContext* context, int flags) const
{
  const Item::Ptr item = context->getContextItem();
  if(item.isNull()) {
    XQThrow(DynamicErrorException,X("XQContextItem::ContextItemResult::createResult"),
             X("It is an error for the context item to be undefined when using it [err:XPDY0002]"));
  }
  return item;
}
开发者ID:xubingyue,项目名称:xqilla,代码行数:9,代码来源:XQContextItem.cpp

示例8: createSequence

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);
}
开发者ID:kanbang,项目名称:Colt,代码行数:10,代码来源:FunctionName.cpp

示例9: createSequence

Sequence FunctionConcat::createSequence(DynamicContext* context, int flags) const
{
  XMLBuffer result;
  for(unsigned int i = 1; i <= getNumArgs(); ++i) {
    Item::Ptr item = getParamNumber(i,context)->next(context);
    if(!item.isNull()) {
      result.append(item->asString(context));
    }
  }
  return Sequence(context->getItemFactory()->createString(result.getRawBuffer(), context), context->getMemoryManager());
}
开发者ID:xubingyue,项目名称:xqilla,代码行数:11,代码来源:FunctionConcat.cpp

示例10: if

  virtual Item::Ptr nextOrTail(Result &tail, DynamicContext *context)
  {
    if(_position.isNull()) {
      _position = (const ATDecimalOrDerived*)_func->getParamNumber(2, context)->next(context).get();
      _one = context->getItemFactory()->createInteger(1, context);
      _i = _one;
      _target = ClosureResult::create(_func->getArguments()[0], context);

      if(!_position->greaterThan(_one, context)) {
        _inserts = _func->getParamNumber(3, context);
        _doInserts = true;
      }
    }

    Item::Ptr result = 0;
    while(result.isNull()) {
      if(_doInserts) {
        result = _inserts->next(context);
        if(result.isNull()) {
          // Tail call optimisation
          tail = _target;
          return 0;
        }
      }
      else {
        result = _target->next(context);
        _i = _i->add(_one, context);
        if(result.isNull()) {
          // Tail call optimisation
          tail = ClosureResult::create(_func->getArguments()[2], context);
          return 0;
        }
        else if(_position->equals((const AnyAtomicType*)_i.get(), context)) {
          _inserts = _func->getParamNumber(3, context);
          _doInserts = true;
        }
      }
    }

    return result;
  }
开发者ID:kanbang,项目名称:Colt,代码行数:41,代码来源:FunctionInsertBefore.cpp

示例11: createSequence

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

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

  AutoDeallocate<XMLCh> buf(UnicodeTransformer::caseFold(arg->asString(context), memMgr), memMgr);
  return Sequence(context->getItemFactory()->createString(buf.get(), context), memMgr);
}
开发者ID:xubingyue,项目名称:xqilla,代码行数:12,代码来源:FunctionCaseFold.cpp

示例12: getNumericParam

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]"));
  }
}
开发者ID:kanbang,项目名称:Colt,代码行数:14,代码来源:NumericFunction.cpp

示例13: createSequence

Sequence FunctionParseXML::createSequence(DynamicContext* context, int flags) const
{
  Item::Ptr item = getParamNumber(1, context)->next(context);

  if(item.isNull()) return Sequence(context->getMemoryManager());

  const XMLCh *xml = item->asString(context);

  MemBufInputSource src((XMLByte*)xml, XMLString::stringLen(xml) * sizeof(XMLCh), name);
  src.setEncoding(XMLUni::fgUTF16EncodingString);

  try {
    return Sequence(context->parseDocument(src, this, context->getProjection() ? queryPathTree_ : 0), context->getMemoryManager());
  }
  catch(XMLParseException &e) {
    XQThrow(FunctionException, X("FunctionParseXML::createSequence"), e.getError());
  }
}
开发者ID:kanbang,项目名称:Colt,代码行数:18,代码来源:FunctionParseXML.cpp

示例14: createSequence

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

  Item::Ptr strParm = getParamNumber(1,context)->next(context);
  if(strParm.isNull())
    return Sequence(context->getItemFactory()->createInteger(0, context), mm);

  const XMLCh *str = strParm->asString(context);

  long length = 0;
  while(*str) {
    ++length;
    if(RegxUtil::isHighSurrogate(*str)) ++str;
    ++str;
  }

  return Sequence(context->getItemFactory()->createInteger(length, context), mm);
}
开发者ID:xubingyue,项目名称:xqilla,代码行数:19,代码来源:FunctionStringLength.cpp

示例15: next

  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;
  }
开发者ID:kanbang,项目名称:Colt,代码行数:20,代码来源:XQStep.cpp


注:本文中的item::Ptr::isNull方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。