本文整理汇总了C++中DocumentPtr::documentElement方法的典型用法代码示例。如果您正苦于以下问题：C++ DocumentPtr::documentElement方法的具体用法？C++ DocumentPtr::documentElement怎么用？C++ DocumentPtr::documentElement使用的例子？那么恭喜您, 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类DocumentPtr的用法示例。
在下文中一共展示了DocumentPtr::documentElement方法的1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: parse
/**
* Takes a stream that is assumed to contain a single complete material
* definition,
* reads the definition and produces a new Material object. If many definitions
* are present then the first one is read
* @param istr A reference to a stream
* @return A new Material object
*/
Material MaterialXMLParser::parse(std::istream &istr) const {
using namespace Poco::XML;
typedef AutoPtr<Document> DocumentPtr;
InputSource src(istr);
DOMParser parser;
// Do not use auto here or anywhereas the Poco API returns raw pointers
// but in some circumstances requires AutoPtrs to manage the memory
DocumentPtr doc;
try {
doc = parser.parse(&src);
} catch (SAXParseException &exc) {
std::ostringstream os;
os << "MaterialXMLReader::read() - Error parsing stream as XML: "
<< exc.what();
throw std::invalid_argument(os.str());
}
Element *rootElement = doc->documentElement();
// Iterating is apparently much faster than getElementsByTagName
NodeIterator nodeIter(rootElement, NodeFilter::SHOW_ELEMENT);
Node *node = nodeIter.nextNode();
Material matr;
bool found(false);
while (node) {
if (node->nodeName() == MATERIAL_TAG) {
matr = parse(static_cast<Element *>(node));
found = true;
break;
}
node = nodeIter.nextNode();
}
if (!found) {
throw std::invalid_argument(
"MaterialXMLReader::read() - No material tags found.");
}
return matr;
}