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10BC8
Can't get skipToPath work on real data #18
Description
Basic example from docs works fine:
auto xml = "<carrot>\n" ~
" <foo>\n" ~
" <bar>\n" ~
" <baz/>\n" ~
" <other/>\n" ~
" </bar>\n" ~
" </foo>\n" ~
"</carrot>";
auto result = parseXML(xml);
auto foo = result.skipToPath("foo/bar");
writeln("foo: ", foo.front.name);
It's print foo: bar.
But on real data http://vpaste.net/omIST
I am trying to move to next section:
auto foo = result.skipToPath("protocolLot/applications");
writeln("foo: ", foo.front.name);
And getting print: foo: ns2:export. Why? What's wrong? I expected it will be moved to applications section.
Here is copy-past example:
auto xml = "<carrot>\n" ~
" <foo>\n" ~
" <bar>\n" ~
" <ban>\n" ~
" <baz/>\n" ~
" </ban>\n" ~
" <other/>\n" ~
" </bar>\n" ~
" </foo>\n" ~
"</carrot>";
auto result = parseXML(xml);
auto foo = result.skipToPath("bar/ban"); // problem is here
writeln("foo: ", foo.front.name);
Activity
jmdavis commentedon May 3, 2019
The path is from the start element that's currently at the front of the range. In your last example there,
resultstarts on<carrot>. The only child element that<carrot>has is<foo>. So, any path from<carrot>must start with"foo". If you gave the path"foo/bar/ban", then your last line would printRight now, what's happening is that because you gave an invalid path,
skipToPathreturns an empty range, andfoo.emptyistrue. So, it's not actually valid to callfoo.frontat that point. It just so happens thatfrontreturns the end tag, becausefrontdoesn't assert that it wasn't called when the range was empty, and the end tag was the last data it had before the end of the range was reached. Iffoo.frontasserted that the range was not empty, then you'd be getting an assertion failure when you attempted to callfoo.front. After you callskipToPath, you should be checking whether the return value isemptyso that you know whether it actually found the path that you requested. And for the path to be correct in that last example, you would either have to pop off the first element so that you were on<foo>before callingskipToPath("bar/ban"), or you would have to callskipToPath("foo/bar/ban").For your real data, for
"protocolLot/applications"to be the right path,<ns2:fcsProtocolEF3 schemeVersion="8.1">would have to be the first element in the range, whereas I'm guessing that you were on its parent start tag<ns2:export ...>, which would mean that the path would need to be"ns2:fcsProtocolEF3/protocolLot/applications".