Don't assume that the last step of the XPath is an element name

In order to find the number of items in the model, the model did a
second query on the document representing the result set.
So, suppose the user queried for //a/b/c, the result set would contain
all the 'c' elements from the input document.
In order to find the number of items in the result set, it did a second
query with the expression  "count(/dummy:items/c)", where 'c' was
extracted from the last step in the original XPath expression

For simple expressions, this worked fine.

However, if the last step had a predicate such as "//c/parent::b" it
didn't work.

The solution is to not filter *again* the last step when we query for
the count, since we know that all result items are direct children of
"dummy:items", and instead just execute the query
"count(dummy::items/*)".

This should also potentially improve performance.

Task-number: QTBUG-17588
Change-Id: Ib2fdf1ec8b91022df0597e089ad34d34b04428b0
Reviewed-by: Alan Alpert <aalpert@blackberry.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickxmllistmodel/data/groups.qml b/tests/auto/quick/qquickxmllistmodel/data/groups.qml
new file mode 100644
index 0000000000..c1b574a822
--- /dev/null
+++ b/tests/auto/quick/qquickxmllistmodel/data/groups.qml
@@ -0,0 +1,10 @@
+import QtQuick 2.0
+import QtQuick.XmlListModel 2.0
+
+XmlListModel {
+    source: "groups.xml"
+    query: "//animal[@name='Garfield']/parent::group"
+
+    XmlRole { name: "id"; query: "@id/string()" }
+    XmlRole { name: "name"; query: "@name/string()" }
+}