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package com.vaadin.tests.data;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractTestUI;
import com.vaadin.ui.Button;
import com.vaadin.ui.Grid;
public class ReplaceDataProvider extends AbstractTestUI {
private static class TestClass {
public String someField;
public int hash;
public TestClass(int hash) {
this.hash = hash;
someField = "a";
}
}
@Override
protected void setup(VaadinRequest request) {
Grid<TestClass> grid = new Grid<>();
grid.addColumn(item -> item.someField);
List<TestClass> listOfClasses = IntStream.range(0, 10)
.mapToObj(TestClass::new).collect(Collectors.toList());
for (int i = 0; i < 10; i++) {
listOfClasses.add(new TestClass(10));
}
grid.setItems(listOfClasses);
Button replaceBtn = new Button("replace data provider");
replaceBtn.addClickListener(clickEvent -> {
List<TestClass> newList = IntStream.range(0, 10)
.mapToObj(TestClass::new).collect(Collectors.toList());
newList.get(0).someField = "b";
grid.setItems(newList);
});
Button replaceAndSelectBtn = new Button(
"replace data provider and select second");
replaceAndSelectBtn.addClickListener(clickEvent -> {
List<TestClass> newList = IntStream.range(0, 10)
.mapToObj(TestClass::new).collect(Collectors.toList());
newList.get(0).someField = "b";
grid.setItems(newList);
grid.getSelectionModel().select(newList.get(1));
});
addComponents(replaceBtn, replaceAndSelectBtn, grid);
}
}
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