XQilla2.3.2解析查询

void parseQuery(const char* queryStr,const char* xmlFileName)

 {

     XQilla xqilla;//构造函数中初始化Xerces-C,析构函数中释放

     //建立查询器

     XQQuery* query = xqilla.parse(X(queryStr));

     //获取环境

     DynamicContext* context = query->createDynamicContext();

     //加载文件到队列

     Sequence seq = context->resolveDocument(X(xmlFileName));

     


   if(!seq.isEmpty() && seq.first()->isNode()) 

   {

     context->setContextItem(seq.first());

     context->setContextPosition(1);

     context->setContextSize(1);

   }


   //执行查询

  Result result = query->execute(context);

  //输出结果

    Item::Ptr item;

   while(item = result->next(context)) {

     std::cout << UTF8(item->asString(context)) << std::endl;

   }

 }

 int main(int argc, char *argv[]) 

 {    

   parseQuery("foo/bar/@baz","foo.xml");  

     return 0;

 }