How to skip XML file reading to end of current parent element using QXMLStreamReader?

soma_yarram

Hello,

Assume that I have an XML file's data as follows:

<Parent-1>
      <Child-1>Info-1</Child-1>
      <Child-2>Info-2</Child-2>
      <Child-3>Info-3</Child-3>
</Parent-1>
<Parent-2>
      <Child-1>Info-1</Child-1>
      <Child-2>Info-2</Child-2>
      <Child-3>Info-3</Child-3>
</Parent-2>
<Parent-3>
      <Child-1>Info-1</Child-1>
      <Child-2>Info-2</Child-2>
      <Child-3>Info-3</Child-3>
</Parent-3>

When I read the file from the beginning, first I read the start element Parent-1, and then its first child Child-1 and its text Info-1.

If the Parent-1/Child-1's Info-1 is equal to some specific value eg: SKIP, then I want to skip the entire Parent-1 element, and read next parent element Parent-2.

As far as I know, QXMLStreamReader provides only skipCurrentElement() and readNextStartElement(), which will read until the next start element, in my case Parent-1's Child-2.

Is there any way to skip the entire parent element? Any help is much appreciated.

Thanks in advance.

sierdzio

If your read tags in a loop, then you can just skip parsing elements until you encounter Parent-1 closing element.

Something like this:

QXmlStreamReader xml;
while (!xml.atEnd()) {
    xml.readNext();
    // I assume you already read the SKIP tag
    if (xml.isEndElement() && xml.name() != QLatin1String("Parent-1"))
        continue;
}

soma_yarram

Thank you @sierdzio. A small question again: Is there any anyway to seek to end of file using QXMLStreamReader without reading all lines using readNext() in a loop?

sierdzio

@soma_yarram said in How to skip XML file reading to end of current parent element using QXMLStreamReader?:

Thank you @sierdzio. A small question again: Is there any anyway to seek to end of file using QXMLStreamReader without reading all lines using readNext() in a loop?

No. It is a stream reader, it works on a (continuous) stream of data. The only way in which QXmlStreamReader can progress further is to read next element; it can't jump. At least that is how I remember it.

You can seach for closing tag (if you know it's name) in a different way, though - read the file into a QByteArray or QString, then perform search from the back for your tag (using indexOf() method for example).