package com.vaadin.tests.components.table;
import java.util.HashSet;
import java.util.Set;
import com.vaadin.annotations.AutoGenerated;
import com.vaadin.data.Item;
import com.vaadin.data.Property;
import com.vaadin.data.Property.ValueChangeEvent;
import com.vaadin.data.util.IndexedContainer;
import com.vaadin.shared.ui.MarginInfo;
import com.vaadin.tests.components.TestBase;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Label;
import com.vaadin.ui.Table;
import com.vaadin.ui.Table.Align;
import com.vaadin.ui.Table.ColumnGenerator;
import com.vaadin.ui.VerticalLayout;
public class LargeSelectionCausesNPE extends TestBase {
@AutoGenerated
private Table table;
private static final String ID = "id";
private static final String NAME = "name";
private static final String CODE = "code";
@Override
protected void setup() {
addComponent(new SelectionExample());
}
@Override
protected String getDescription() {
return "Attempting to update table contents while selection reaches beyond cache limits causes a NPE.<br>"
+ " Select a large amount of rows, e.g. from name2 to name262, return to the top of the table,"
+ " then try to update the first item twice.<br>"
+ " Test is broken if the original values don't reappear on the second click of the button.";
}
@Override
protected Integer getTicketNumber() {
return 8519;
}
public class SelectionExample extends VerticalLayout {
Table table = new Table();
Button button = new Button("Update the first item");
Label nameLabel = new Label();
HashSet<Object> markedRows = new HashSet<Object>();
Label selected = new Label();
public SelectionExample() {
addComponent(table);
addComponent(button);
setMargin(new MarginInfo(true, false, false, false));
// Label to indicate current selection
selected.setValue("No selection");
addComponent(selected);
// set a style name, so we can style rows and cells
table.setStyleName("iso3166");
// size
table.setWidth("100%");
table.setPageLength(5);
// selectable
table.setSelectable(true);
table.setMultiSelect(true);
table.setImmediate(true);
// connect data source
table.setContainerDataSource(getContainer());
table.addGeneratedColumn(CODE, columnGenerator);
// turn on column reordering and collapsing
table.setColumnReorderingAllowed(true);
table.setColumnCollapsingAllowed(true);
// set column headers
table.setVisibleColumns(new String[] { CODE, NAME, ID });
table.setColumnHeaders(new String[] { "DummyCode", "DummyName",
"DummyId" });
// Column alignment
table.setColumnAlignment(ID, Align.CENTER);
// Column width
table.setColumnWidth(CODE, 70);
table.setColumnExpandRatio(NAME, 1);
table.setColumnWidth(ID, 70);
// listen for valueChange, a.k.a 'select' and update the label
table.addValueChangeListener(valueChangeListener);
button.setId(getTicketNumber() + "-button");
button.addClickListener(clickListener);
}
Table.ValueChangeListener valueChangeListener = new Table.ValueChangeListener() {
@Override
public void valueChange(ValueChangeEvent event) {
// in multiselect mode, a Set of itemIds is returned,
// in singleselect mode the itemId is returned directly
Set<?> value = (Set<?>) event.getProperty().getValue();
if (null == value || value.size() == 0) {
selected.setValue("No selection");
} else {
selected.setValue("Selected: " + table.getValue());
}
}
};
Button.ClickListener clickListener = new Button.ClickListener() {
@Override
public void buttonClick(ClickEvent event) {
Property nameProperty = table.getContainerProperty(0, NAME);
if (("0").equals(nameLabel.getValue())) {
nameProperty.setValue(NAME + "0-version2");
nameLabel.setValue("0-version2");
} else {
nameProperty.setValue(NAME + 0);
nameLabel.setValue("0");
}
}
};
public IndexedContainer getContainer() {
IndexedContainer container = new IndexedContainer();
container.addContainerProperty(NAME, String.class, null);
container.addContainerProperty(ID, Integer.class, null);
for (int i = 0; i < 264; i++) {
String name = NAME + i;
int id = i;
Item item = container.addItem(id);
item.getItemProperty(NAME).setValue(name);
item.getItemProperty(ID).setValue(id);
}
container.sort(new Object[] { ID }, new boolean[] { true });
return container;
}
ColumnGenerator columnGenerator = new ColumnGenerator() {
@Override
public Object generateCell(Table source, Object itemId,
Object columnId) {
Label label = new Label();
label.setSizeUndefined();
label.setValue(itemId.toString());
label.setId(getTicketNumber() + "-" + itemId);
if (0 == (Integer) itemId) {
nameLabel = label;
}
return label;
}
};
}
}