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package com.vaadin.tests.performance;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import javax.servlet.annotation.WebServlet;
import com.vaadin.annotations.VaadinServletConfiguration;
import com.vaadin.data.TreeData;
import com.vaadin.data.provider.TreeDataProvider;
import com.vaadin.server.VaadinRequest;
import com.vaadin.server.VaadinServlet;
import com.vaadin.tests.data.bean.Address;
import com.vaadin.tests.data.bean.Person;
import com.vaadin.ui.TreeGrid;
public class TreeGridMemory extends AbstractBeansMemoryTest<TreeGrid<Person>> {
public static final String PATH = "/tree-grid-memory/";
@WebServlet(urlPatterns = PATH
+ "*", name = "TreeGridServlet", asyncSupported = true)
@VaadinServletConfiguration(ui = TreeGridMemory.class, productionMode = false)
public static class Servlet extends VaadinServlet {
}
private boolean initiallyExpanded = false;
@Override
protected void init(VaadinRequest request) {
if (request.getParameter("initiallyExpanded") != null) {
initiallyExpanded = true;
}
super.init(request);
}
@Override
protected TreeGrid<Person> createComponent() {
TreeGrid<Person> treeGrid = new TreeGrid<>();
treeGrid.addColumn(Person::getFirstName).setCaption("First Name");
treeGrid.addColumn(Person::getLastName).setCaption("Last Name");
treeGrid.addColumn(person -> Optional.ofNullable(person.getAddress())
.map(Address::getStreetAddress).orElse(null))
.setCaption("Street");
treeGrid.addColumn(person -> Optional.ofNullable(person.getAddress())
.map(Address::getPostalCode).map(Object::toString).orElse(""))
.setCaption("Zip");
treeGrid.addColumn(person -> Optional.ofNullable(person.getAddress())
.map(Address::getCity).orElse(null)).setCaption("City");
return treeGrid;
}
@Override
protected void setInMemoryContainer(TreeGrid<Person> treeGrid,
List<Person> data) {
TreeData<Person> treeData = new TreeData<>();
treeGrid.setDataProvider(new TreeDataProvider<>(treeData));
List<Person> toExpand = new ArrayList<>();
if (data.size() != 0 && data.size() % 2 == 0) {
// treat list as if it were a balanced binary tree
treeData.addItem(null, data.get(0));
int n = 0;
while (2 * n + 2 < data.size()) {
treeData.addItems(data.get(n),
data.subList(2 * n + 1, 2 * n + 3));
toExpand.add(data.get(n));
n++;
}
} else {
treeData.addItems(null, data);
}
if (initiallyExpanded) {
treeGrid.expand(toExpand);
}
}
@Override
protected void setBackendContainer(TreeGrid<Person> component,
List<Person> data) {
throw new UnsupportedOperationException();
}
}
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