Examples with DataProvider com.vaadin.flow.data.provider.DataProvider used on opensource projects

Example 11 with DataProvider

use of com.vaadin.flow.data.provider.DataProvider in project flow-components by vaadin.

the class Select method reset.

@SuppressWarnings("unchecked")
private void reset() {
    keyMapper.removeAll();
    listBox.removeAll();
    clear();
    requestClientSideContentUpdateIfNotPending();
    if (isEmptySelectionAllowed()) {
        addEmptySelectionItem();
    }
    synchronized (dataProvider) {
        final AtomicInteger itemCounter = new AtomicInteger(0);
        getDataProvider().fetch(DataViewUtils.getQuery(this)).map(item -> createItem((T) item)).forEach(component -> {
            add((Component) component);
            itemCounter.incrementAndGet();
        });
        lastFetchedDataSize = itemCounter.get();
        // so as to avoid multiple beforeClientResponses.
        if (sizeRequest == null) {
            sizeRequest = ui -> {
                fireSizeEvent();
                sizeRequest = null;
            };
            // Size event is fired before client response so as to avoid
            // multiple size change events during server round trips
            runBeforeClientResponse(sizeRequest);
        }
    }
}