Shows use of a Vaadin Table Generator

TestApp.java

package com.example;

import com.vaadin.Application;
import com.vaadin.data.Item;
import com.vaadin.data.util.IndexedContainer;
import com.vaadin.terminal.ExternalResource;
import com.vaadin.ui.Embedded;
import com.vaadin.ui.Table;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;


public class TestApp extends Application {
  public void init() {
    Window mainWindow = new TestWindow();
    setMainWindow(mainWindow);
  }

  public class TestWindow extends Window {
    public TestWindow() {

      IndexedContainer container = createContainer();
      Table table = createTable(container);

      VerticalLayout mainLayout = new VerticalLayout();
      mainLayout.addComponent(table);
      mainLayout.setSizeFull();

      setContent(mainLayout);
    }


    /* Build a model for the table with the data : Lots of ways of doing this;
      Just a quick-and-dirty example */
    private IndexedContainer createContainer() {
      IndexedContainer container = new IndexedContainer();
      container.addContainerProperty("title", String.class, null);
      container.addContainerProperty("url", String.class, null);
      container.addContainerProperty("height", Integer.class, null);
      container.addContainerProperty("width", Integer.class, null);

      addItem(container, "Sami Viitanen", "http://vaadin.com/vaadin-theme/images/company/personnel/alump.png", 121, 134);
      addItem(container, "Anna Koskinen", "http://vaadin.com/vaadin-theme/images/company/personnel/anna.png", 121, 134);
      addItem(container, "Artur Signell", "http://vaadin.com/vaadin-theme/images/company/personnel/artur.png", 121, 134);
      return container;
    }

    private void addItem(IndexedContainer container, String title, String url, int height, int width) {
      Object itemId = container.addItem();
      container.getItem(itemId).getItemProperty("title").setValue(title);
      container.getItem(itemId).getItemProperty("url").setValue(url);
      container.getItem(itemId).getItemProperty("height").setValue(height);
      container.getItem(itemId).getItemProperty("width").setValue(width);
    }

    private Table createTable(IndexedContainer container) {
      Table table = new Table("Image Table", container);
      table.setSizeFull();
      table.addGeneratedColumn("image", new Table.ColumnGenerator() {
        @Override
        public Object generateCell(Table source, Object itemId, Object columnId) {
          Item item = source.getItem(itemId);
          String url = (String) item.getItemProperty("url").getValue();
          int height = (Integer) item.getItemProperty("height").getValue();
          int width = (Integer) item.getItemProperty("width").getValue();

          return new Embedded("", new ExternalResource(url));

        }

      });
      table.setVisibleColumns(new Object[]{"image", "title"});
      table.setColumnExpandRatio("title", 1f);
      return table;
    }

  }
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
		  http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         version="2.5">

  <servlet>
    <servlet-name>ExampleApp</servlet-name>
    <servlet-class>com.vaadin.terminal.gwt.server.ApplicationServlet</servlet-class>
    <init-param>
      <param-name>application</param-name>
      <param-value>com.example.TestApp</param-value>
    </init-param>
  </servlet>


  <servlet-mapping>
    <servlet-name>ExampleApp</servlet-name>
    <url-pattern>/*</url-pattern>
  </servlet-mapping>

</web-app>