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package com.vaadin.tests.data;
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.ui.Button;
import com.vaadin.ui.Grid;
@Widgetset("com.vaadin.DefaultWidgetSet")
public class GridRefreshWithGetId extends AbstractTestUI {
private static class TestObject {
private final int id;
private String name;
public TestObject(int id, String name) {
this.id = id;
this.name = name;
}
public int getId() {
return id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
/**
* The class intentionally has strange {@code hashCode()} and
* {@code equals()} implementation to ensure if {@code Grid} relies on
* bean id rather than on bean hashcode/equals identification.
*
* {@see Object.equals}
*/
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
TestObject myObject = (TestObject) o;
if (id != myObject.id)
return false;
return name != null ? name.equals(myObject.name)
: myObject.name == null;
}
/**
* The class intentionally has strange {@code hashCode()} and
* {@code equals()} implementation to ensure if {@code Grid} relies on
* bean id rather than on bean hashcode/equals identification.
*
* {@see Object.hashCode}
*/
@Override
public int hashCode() {
int result = id;
result = 31 * result + (name != null ? name.hashCode() : 0);
return result;
}
}
@Override
protected void setup(VaadinRequest request) {
List<TestObject> data = new ArrayList<>();
data.add(new TestObject(0, "blue"));
data.add(new TestObject(1, "red"));
data.add(new TestObject(2, "green"));
data.add(new TestObject(3, "yellow"));
data.add(new TestObject(4, "purple"));
ListDataProvider<TestObject> dataProvider = new ListDataProvider<TestObject>(
data) {
@Override
public Object getId(TestObject item) {
return item.getId();
}
};
Grid<TestObject> grid = new Grid<>();
grid.setDataProvider(dataProvider);
addComponent(grid);
grid.addColumn(TestObject::getName);
Button button = new Button("Change green to black");
button.addClickListener(event1 -> {
TestObject myObject = data.get(2);
myObject.setName("black");
dataProvider.refreshItem(myObject);
});
addComponent(button);
}
}
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