func (this *ParentScan) RunOnce(context *Context, parent value.Value) {
this.once.Do(func() {
defer context.Recover() // Recover from any panic
defer close(this.itemChannel) // Broadcast that I have stopped
defer this.notify() // Notify that I have stopped
// Shallow copy of the parent includes
// correlated and annotated aspects
this.sendItem(parent.Copy().(value.AnnotatedValue))
})
}
/*
This method sorts the input array value, in N1QL collation
order. It uses the Sort method in the sort package. If the
input value is of type missing return a missing value, and
for all non array values return null.
*/
func (this *ArraySort) Apply(context Context, arg value.Value) (value.Value, error) {
if arg.Type() == value.MISSING {
return value.MISSING_VALUE, nil
} else if arg.Type() != value.ARRAY {
return value.NULL_VALUE, nil
}
cv := arg.Copy()
sorter := value.NewSorter(cv)
sort.Sort(sorter)
return cv, nil
}