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package com.vaadin.tests.components.grid;
import java.util.ArrayList;
import java.util.List;
import com.vaadin.annotations.Widgetset;
import com.vaadin.data.provider.ListDataProvider;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractTestUI;
import com.vaadin.tests.data.bean.Address;
import com.vaadin.tests.data.bean.Country;
import com.vaadin.tests.data.bean.Person;
import com.vaadin.tests.data.bean.Sex;
import com.vaadin.ui.Button;
import com.vaadin.ui.Grid;
import com.vaadin.ui.renderers.TextRenderer;
@Widgetset("com.vaadin.DefaultWidgetSet")
public class GridNullSafeNestedPropertyColumn extends AbstractTestUI {
private List<Person> personList = new ArrayList<>();
private ListDataProvider<Person> listDataProvider;
@Override
protected void setup(VaadinRequest request) {
setErrorHandler(null);
Grid<Person> grid = new Grid<>(Person.class);
grid.setSizeFull();
personList.add(new Person("person", "with", "an address", 0,
Sex.UNKNOWN, new Address("street", 0, "", Country.FINLAND)));
listDataProvider = new ListDataProvider<>(personList);
grid.setDataProvider(listDataProvider);
Button addPersonButton = new Button("add person with a null address",
event -> {
Address address = null;
Person person = new Person("person", "without", "address",
42, Sex.UNKNOWN, address);
personList.add(person);
listDataProvider.refreshAll();
});
addPersonButton.setId("add");
Button addSafeColumnButton = new Button(
"add 'address.streetAddress' as a null-safe column", event -> {
grid.addColumn("address.streetAddress", new TextRenderer(),
Grid.Column.NestedNullBehavior.ALLOW_NULLS);
});
addSafeColumnButton.setId("safe");
Button addUnsafeColumnButton = new Button(
"add 'address.streetAddress' column without nested null safety",
event -> {
grid.addColumn("address.streetAddress");
});
addUnsafeColumnButton.setId("unsafe");
addComponents(grid, addPersonButton, addSafeColumnButton,
addUnsafeColumnButton);
}
}
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