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CollectionContainer - bind arrays and collections
Hi all,
I was working on a small analysis project and along the way I found a nifty way of displaying CSV (comma separated values) in Vaadin Table.
To do this you need OpenCSV and the CollectionContainer add-on.
But with these it becomes quite easy:
// Read using OpenCSV
CSVReader r = new CSVReader(new FileReader(file));
List<Object[]> rows = r.readAll();
// Extract column captions
String[] columnHeaders = (String[]) rows.get(0);
rows.remove(0);
// Bind to table
CollectionContainer ds = CollectionContainer.fromPrimitives(rows, -1);
table.setContainerDataSource(ds);
table.setColumnHeaders(columnHeaders);Disclaimer: As you can see here, the data is read fully into a List (which does not scale to large amounts) and no error checking is present (left it out for readability).
Anyway, this works very well for my case of "typical" amount of data (i.e. ~1000 rows, ~10 columns).