Java 类com.vaadin.ui.Link 实例源码

@Override
public void enter(ViewChangeEvent event) {
    pageHelper.setErrorHandler(this);

    this.removeAllComponents();

    // Get application
    int appId = Integer.parseInt(event.getParameters());

    Application app = pageHelper.getApp(appId);

    // Header
    this.addComponent(new PageHeader(app, "Endpoints"));

    // Add endpoints links
    app.endpoints().asList().stream()
       .forEach(endpointUrl -> this.addComponent(new Link(endpointUrl+".json", new ExternalResource(endpointUrl+".json"), "_blank", 0, 0, BorderStyle.DEFAULT)));
}

public SourceView() {

        Label caption = new Label("Sources");
        caption.addStyleName(DSTheme.LABEL_HUGE);
        addComponents(caption);

        List<Link> linkList = new ArrayList<Link>();

        Link aidedd = new Link("AideDD", new ExternalResource("http://www.aidedd.org/"));
        linkList.add(aidedd);
        Link gemmaline = new Link("Gemmaline", new ExternalResource("http://www.gemmaline.com/faerun/"));
        linkList.add(gemmaline);
        Link frwiki = new Link("Wiki des royaumes oubliés",
                new ExternalResource("https://fr.wikipedia.org/wiki/Portail:Royaumes_oubli%C3%A9s"));
        linkList.add(frwiki);

        for (Link link : linkList) {
            link.setTargetName("_blank");
            addComponent(link);
        }
    }

private HorizontalLayout saveConfigurationButtonsLayout() {

        final HorizontalLayout hlayout = new HorizontalLayout();
        hlayout.setSpacing(true);
        saveConfigurationBtn = SPUIComponentProvider.getButton(UIComponentIdProvider.SYSTEM_CONFIGURATION_SAVE, "", "",
                "", true, FontAwesome.SAVE, SPUIButtonStyleSmallNoBorder.class);
        saveConfigurationBtn.setEnabled(false);
        saveConfigurationBtn.setDescription(i18n.getMessage("configuration.savebutton.tooltip"));
        saveConfigurationBtn.addClickListener(event -> saveConfiguration());
        hlayout.addComponent(saveConfigurationBtn);

        undoConfigurationBtn = SPUIComponentProvider.getButton(UIComponentIdProvider.SYSTEM_CONFIGURATION_CANCEL, "",
                "", "", true, FontAwesome.UNDO, SPUIButtonStyleSmallNoBorder.class);
        undoConfigurationBtn.setEnabled(false);
        undoConfigurationBtn.setDescription(i18n.getMessage("configuration.cancellbutton.tooltip"));
        undoConfigurationBtn.addClickListener(event -> undoConfiguration());
        hlayout.addComponent(undoConfigurationBtn);

        final Link linkToSystemConfigHelp = SPUIComponentProvider
                .getHelpLink(uiProperties.getLinks().getDocumentation().getSystemConfigurationView());
        hlayout.addComponent(linkToSystemConfigHelp);

        return hlayout;
    }

public MenuView() {
    setMargin(true);
    setSpacing(true);

    Label header = new Label("GridStack Vaadin add-on");
    header.addStyleName(ValoTheme.LABEL_H1);
    addComponent(header);

    addComponents(
            createNavigation(SimpleView.class, SimpleView.VIEW_NAME, "Simple example"),
            createNavigation(TestView.class, TestView.VIEW_NAME, "Test it"),
            createNavigation(SplitView.class, SplitView.VIEW_NAME, "List demo")
    );

    addComponent(new Link(
            "GridStack Vaadin add-on project page on GitHub",
            new ExternalResource("https://github.com/alump/GridStack")));

    addComponent(new Link(
            "This project is based on gridstack.js JavaScript library, written by Pavel Reznikov",
            new ExternalResource("https://github.com/troolee/gridstack.js")));
}

public Component getOverviewComponent(final Attachment attachment, final RelatedContentComponent parent) {

  // If the attachment has no description, overview link is link to actual page
  // instead of showing popup with details.
  if(attachment.getDescription() != null && !"".equals(attachment.getDescription())) {
    Button attachmentLink = new Button(attachment.getName());
    attachmentLink.addStyleName(Reindeer.BUTTON_LINK);

    attachmentLink.addListener(new ClickListener() {
      private static final long serialVersionUID = 1L;

      public void buttonClick(ClickEvent event) {
        parent.showAttachmentDetail(attachment);
      }
    });
    return attachmentLink;
  } else {
    return new Link(attachment.getName(), new ExternalResource(attachment.getUrl()));
  }
}

public Component getDetailComponent(Attachment attachment) {
  VerticalLayout verticalLayout = new VerticalLayout();
  verticalLayout.setSpacing(true);
  verticalLayout.setMargin(true);

  verticalLayout.addComponent(new Label(attachment.getDescription()));

  HorizontalLayout linkLayout = new HorizontalLayout();
  linkLayout.setSpacing(true);
  verticalLayout.addComponent(linkLayout);

  // Icon
  linkLayout.addComponent(new Embedded(null, Images.RELATED_CONTENT_URL));

  // Link
  Link link = new Link(attachment.getUrl(), new ExternalResource(attachment.getUrl()));
  link.setTargetName(ExplorerLayout.LINK_TARGET_BLANK);
  linkLayout.addComponent(link);

  return verticalLayout;
}

public Component getOverviewComponent(final Attachment attachment, final RelatedContentComponent parent) {

  // If the attachment has no description, overview link is link to actual page
  // instead of showing popup with details.
  if(attachment.getDescription() != null && !"".equals(attachment.getDescription())) {
    Button attachmentLink = new Button(attachment.getName());
    attachmentLink.addStyleName(Reindeer.BUTTON_LINK);

    attachmentLink.addListener(new ClickListener() {
      private static final long serialVersionUID = 1L;

      public void buttonClick(ClickEvent event) {
        parent.showAttachmentDetail(attachment);
      }
    });
    return attachmentLink;
  } else {
    return new Link(attachment.getName(), new ExternalResource(attachment.getUrl()));
  }
}

public Component getDetailComponent(Attachment attachment) {
  VerticalLayout verticalLayout = new VerticalLayout();
  verticalLayout.setSpacing(true);
  verticalLayout.setMargin(true);

  verticalLayout.addComponent(new Label(attachment.getDescription()));

  HorizontalLayout linkLayout = new HorizontalLayout();
  linkLayout.setSpacing(true);
  verticalLayout.addComponent(linkLayout);

  // Icon
  linkLayout.addComponent(new Embedded(null, Images.RELATED_CONTENT_URL));

  // Link
  Link link = new Link(attachment.getUrl(), new ExternalResource(attachment.getUrl()));
  link.setTargetName(ExplorerLayout.LINK_TARGET_BLANK);
  linkLayout.addComponent(link);

  return verticalLayout;
}

@Override
protected void init(VaadinRequest request) {

    layout.setMargin(true);
    layout.setSpacing(true);
    setContent(layout);

    addTwitterButton();
    addFacebookButton();
    addLinkedInButton();
    addGitHubButton();

    addTwitterNativeButton();

    layout.addComponent(new Link("Add-on at Vaadin Directory", new ExternalResource("http://vaadin.com/addon/oauth-popup-add-on")));
    layout.addComponent(new Link("Source code at GitHub", new ExternalResource("https://github.com/ahn/vaadin-oauthpopup")));
}

private void drawPush(final UserProfile profile) {

    final String remote = remoteName(profile);

    String url = githubLinkFromOrigin(repo.getRemote(remote));
    layout.addComponent(new Link(url, new ExternalResource(url)));

    Button b = new Button("Push to GitHub");
    b.addClickListener(new ClickListener() {

        @Override
        public void buttonClick(ClickEvent event) {
            try {
                gitPush(profile.getToken().getToken(), remote);
            } catch (GitAPIException e) {
                Notification.show(e.getMessage(), Notification.Type.ERROR_MESSAGE);
                e.printStackTrace();
            }
        }
    });
    layout.addComponent(b);
}

Deployer(String pathToWar, String paasApiUri, Link linkToApp, Button buttonLinkToApp
        , String apiLocation, User user, Button deployButton){
    super(apiLocation);
    //System.out.println("apiLocation in Deployer: " + apiLocation);
    //System.out.println("apiLocation in CoapsCaller: " + getApiLocation());
    this.deployButton = deployButton;

    this.user = user;

    this.linkToApp = linkToApp;
    this.buttonLinkToApp = buttonLinkToApp;

    this.pathToWar = pathToWar;
    this.paasApiUri = paasApiUri;
    File file = new File(pathToWar);
    warName = file.getName();
    warLocation = file.getParentFile().getAbsolutePath();
appName = warName.replace(".war", "");

      deployLocation = "/home/ubuntu/delpoyedprojects";
      memory = "512";
      Date today = new Date();
      date = new SimpleDateFormat("yyyy-MM-dd").format(today);
  }

public AboutView() {
    setCaption(Messages.getString("aboutTitle")); //$NON-NLS-1$
    setModal(true);
    setResizable(false);
    center();
    VerticalLayout main = new VerticalLayout();
    Resource logoResource = new ThemeResource("img/omc-logo.png"); //$NON-NLS-1$
    Image appLogoImage = new Image("",logoResource); //$NON-NLS-1$
    Label appLabel = new Label(appName + " v." + version); //$NON-NLS-1$
    Label developerLabel = new Label(developer);
    Link githubLink = new Link(github, new ExternalResource(github));

    main.addComponents(appLogoImage, appLabel, developerLabel, githubLink);
    main.setComponentAlignment(appLabel, Alignment.MIDDLE_CENTER);
    main.setComponentAlignment(developerLabel, Alignment.MIDDLE_CENTER);
    main.setComponentAlignment(githubLink, Alignment.MIDDLE_CENTER);

    setContent(main);
}

private void filterTracksByArtistId(int artistId){
    if(artistId >= 0) {
        trackTable.removeAllItems();
        for(Track track : tracks) {
            if(track.getArtist().getId() == artistId){
                Link downloadLink = new Link(null, new ExternalResource(track.getFile().getAudioMp3UrlString()));
                downloadLink.setIcon(new ThemeResource("img/download.png")); //$NON-NLS-1$
                String albumTitle = ""; //$NON-NLS-1$
                if(track.getAlbum() != null && track.getAlbum().getName().length() > 0) {
                    track.getAlbum().getName();
                }
                trackTable.addItem(new Object[] {new CheckBox(), track.getTitle(),
                        albumTitle, downloadLink}, track.getId());
            }
        }
    }
}

public ArchiveLayout(ArchiveServiceApi archiveService, GetJobsArchiveServiceApi getJobsArchiveService,
        UpdateJobsArchiveServiceApi updateJobsArchiveService) {
    super();

    VerticalLayout downloadContainer = new VerticalLayout();
    VerticalLayout archiveContainer = new VerticalLayout();

    // Component to Archive Jobs
    JobsArchiverPanel archiveConfigurator = new JobsArchiverPanel(this, archiveService,
            getJobsArchiveService, updateJobsArchiveService);
    archiveConfigurator.setSizeFull();

    archiveContainer.addComponent(ViewUtil.createSubHeader("Archive Jobs/Alerts", null));
    archiveContainer.addComponent(archiveConfigurator);

    downloadContainer.addComponent(ViewUtil.createSubHeader("Download Archive", null));
    // Component to download archive

    this.archiveTable = new Table();
    this.archiveTable.setSizeFull();
    this.archiveTable.setPageLength(5);
    this.archiveTable.setImmediate(true);
    this.archiveTable.addContainerProperty("Name", String.class, null);
    this.archiveTable.addContainerProperty("Date", Date.class, null);
    this.archiveTable.addContainerProperty("Size", Long.class, null);
    this.archiveTable.addContainerProperty("Download", Link.class, null);
    this.archiveTable.addContainerProperty("Delete", Button.class, null);
    buildArchivesTable();

    Panel archiveTablePanel = new Panel();
    archiveTablePanel.setContent(this.archiveTable);

    addComponent(archiveContainer);
    addComponent(archiveTablePanel);
}

public static Object generateMgrLink(String caption, String url) {
    Link mgrLink = new Link();
    mgrLink.setCaption(caption);
    mgrLink.setResource(new ExternalResource(url));
    mgrLink.setDescription("Click to go to application");
    mgrLink.setTargetName("_blank");
    return mgrLink;
}

private static Link createJobLink(String caption, Long lastJobId, ServerApi server) {
    HashMap<String, Object> paramMap = new HashMap<>();
    paramMap.put(JOB_ID_PARAM_KEY, lastJobId);

    return createInternalLink(MainUI.VIEW_FRAGMENT_JOBS, paramMap, caption,
            VmidcMessages.getString(VmidcMessages_.JOB_LINK_TOOLTIP), server);
}

private static Link createInternalLink(String fragment, HashMap<String, Object> paramMap, String linkCaption,
        String linkDescription, ServerApi server) {

    String jobLinkUrl = createInternalUrl(fragment, paramMap, server);
    if (jobLinkUrl == null) {
        return null;
    }
    Link jobLink = new Link();
    jobLink.setCaption(linkCaption);
    jobLink.setDescription(linkDescription);
    jobLink.setResource(new ExternalResource(jobLinkUrl));

    return jobLink;
}

private Layout getFooter() {
    Layout footer = new HorizontalLayout();

    footer.addComponent(new Label("Persephone v"+persephoneVersion));
    footer.addComponent(new Link("Created by Vianney FAIVRE", new ExternalResource("https://vianneyfaiv.re"), "_blank", 0, 0, BorderStyle.DEFAULT));
    footer.addComponent(new Link("GitHub", new ExternalResource("https://github.com/vianneyfaivre/Persephone"), "_blank", 0, 0, BorderStyle.DEFAULT));

    footer.setHeight(20, Unit.PIXELS);
    footer.setStyleName("persephone-footer");
    return footer;
}

protected Component buildLinks() {

        final HorizontalLayout links = new HorizontalLayout();
        links.setSpacing(true);
        links.addStyleName("links");
        final String linkStyle = "v-link";

        if (!uiProperties.getLinks().getDocumentation().getRoot().isEmpty()) {
            final Link docuLink = SPUIComponentProvider.getLink(UIComponentIdProvider.LINK_DOCUMENTATION,
                    i18n.getMessage("link.documentation.name"), uiProperties.getLinks().getDocumentation().getRoot(),
                    FontAwesome.QUESTION_CIRCLE, "_blank", linkStyle);
            links.addComponent(docuLink);
            docuLink.addStyleName(ValoTheme.LINK_SMALL);
        }

        if (!uiProperties.getDemo().getUser().isEmpty()) {
            final Link demoLink = SPUIComponentProvider.getLink(UIComponentIdProvider.LINK_DEMO,
                    i18n.getMessage("link.demo.name"), "?demo", FontAwesome.DESKTOP, "_top", linkStyle);
            links.addComponent(demoLink);
            demoLink.addStyleName(ValoTheme.LINK_SMALL);
        }

        if (!uiProperties.getLinks().getRequestAccount().isEmpty()) {
            final Link requestAccountLink = SPUIComponentProvider.getLink(UIComponentIdProvider.LINK_REQUESTACCOUNT,
                    i18n.getMessage("link.requestaccount.name"), uiProperties.getLinks().getRequestAccount(),
                    FontAwesome.SHOPPING_CART, "", linkStyle);
            links.addComponent(requestAccountLink);
            requestAccountLink.addStyleName(ValoTheme.LINK_SMALL);
        }

        if (!uiProperties.getLinks().getUserManagement().isEmpty()) {
            final Link userManagementLink = SPUIComponentProvider.getLink(UIComponentIdProvider.LINK_USERMANAGEMENT,
                    i18n.getMessage("link.usermanagement.name"), uiProperties.getLinks().getUserManagement(),
                    FontAwesome.USERS, "_blank", linkStyle);
            links.addComponent(userManagementLink);
            userManagementLink.addStyleName(ValoTheme.LINK_SMALL);
        }

        return links;
    }

private void addContainerproperties() {
    /* Create HierarchicalContainer container */
    container.addContainerProperty(SPUILabelDefinitions.NAME, Link.class, null);
    container.addContainerProperty(SPUILabelDefinitions.VAR_CREATED_USER, String.class, null);
    container.addContainerProperty(SPUILabelDefinitions.VAR_CREATED_DATE, Date.class, null);
    container.addContainerProperty(SPUILabelDefinitions.VAR_MODIFIED_DATE, Date.class, null);
    container.addContainerProperty(SPUILabelDefinitions.VAR_MODIFIED_BY, String.class, null);
    container.addContainerProperty(SPUILabelDefinitions.AUTO_ASSIGN_DISTRIBUTION_SET, String.class, null);
}

private void addHelpLink() {

        if (StringUtils.isEmpty(helpLink)) {
            return;
        }
        final Link helpLinkComponent = SPUIComponentProvider.getHelpLink(helpLink);
        buttonsLayout.addComponent(helpLinkComponent);
        buttonsLayout.setComponentAlignment(helpLinkComponent, Alignment.MIDDLE_RIGHT);
    }

/**
 * Generates help/documentation links from within management UI.
 *
 * @param uri
 *            to documentation site
 *
 * @return generated link
 */
public static Link getHelpLink(final String uri) {

    final Link link = new Link("", new ExternalResource(uri));
    link.setTargetName("_blank");
    link.setIcon(FontAwesome.QUESTION_CIRCLE);
    link.setDescription("Documentation");
    return link;

}

@Override
public Link createMainViewPageLink() {
    final Link pageLink = new Link(MAIN_VIEW_LINK_TEXT, new ExternalResource(
            LINK_SEPARATOR + CommonsViews.MAIN_VIEW_NAME));
    pageLink.setId(ViewAction.VISIT_MAIN_VIEW.name());
    pageLink.setIcon(VaadinIcons.STAR);
    return pageLink;
}

@Override
public Link createRegisterPageLink() {
    final Link pageLink = new Link("Register", new ExternalResource(
            LINK_SEPARATOR + CommonsViews.MAIN_VIEW_NAME + PAGE_SEPARATOR + ApplicationPageMode.REGISTER));
    pageLink.setId(ViewAction.VISIT_REGISTER.name());
    pageLink.setIcon(VaadinIcons.RANDOM);
    return pageLink;
}

@Override
public Link createLoginPageLink() {
    final Link pageLink = new Link("Login", new ExternalResource(
            LINK_SEPARATOR + CommonsViews.MAIN_VIEW_NAME + PAGE_SEPARATOR + ApplicationPageMode.LOGIN));
    pageLink.setId(ViewAction.VISIT_LOGIN.name());
    pageLink.setIcon(VaadinIcons.SIGN_IN);
    return pageLink;
}

@Override
public Link addCommitteePageLink(final ViewRiksdagenCommittee data) {
    final Link pageLink = new Link(COMMITTEE
            + data.getEmbeddedId().getDetail(), new ExternalResource(PAGE_PREFIX
                    + UserViews.COMMITTEE_VIEW_NAME + PAGE_SEPARATOR + data.getEmbeddedId().getOrgCode()));
    pageLink.setId(ViewAction.VISIT_COMMITTEE_VIEW.name() + PAGE_SEPARATOR
            + data.getEmbeddedId().getOrgCode());
    pageLink.setIcon(VaadinIcons.GROUP);
    return pageLink;
}

@Override
public Link addMinistryPageLink(final ViewRiksdagenMinistry data) {
    final Link pageLink = new Link(MINISTRY + data.getNameId(),
            new ExternalResource(PAGE_PREFIX + UserViews.MINISTRY_VIEW_NAME + PAGE_SEPARATOR
                    + data.getNameId()));
    pageLink.setId(ViewAction.VISIT_MINISTRY_VIEW.name() + PAGE_SEPARATOR
            + data.getNameId());
    pageLink.setIcon(VaadinIcons.GROUP);
    return pageLink;
}

@Override
public Link addPartyPageLink(final ViewRiksdagenParty data) {
    final Link pageLink = new Link(PARTY + data.getPartyName(),
            new ExternalResource(PAGE_PREFIX + UserViews.PARTY_VIEW_NAME + PAGE_SEPARATOR
                    + data.getPartyId()));
    pageLink.setId(ViewAction.VISIT_PARTY_VIEW.name() + PAGE_SEPARATOR
            + data.getPartyId());
    pageLink.setIcon(VaadinIcons.GROUP);
    return pageLink;
}

@Override
public Link createPoliticianPageLink(final PersonData personData) {
    final Link pageLink = new Link(POLITICIAN
            + personData.getFirstName() + ' '
            + personData.getLastName(), new ExternalResource(PAGE_PREFIX
                    + UserViews.POLITICIAN_VIEW_NAME + PAGE_SEPARATOR + personData.getId()));
    pageLink.setId(ViewAction.VISIT_POLITICIAN_VIEW.name() + PAGE_SEPARATOR
            + personData.getId());
    pageLink.setIcon(VaadinIcons.BUG);
    return pageLink;
}

@Override
public Link createSearchDocumentViewPageLink() {
    final Link pageLink = new Link(SEARCH, new ExternalResource(PAGE_PREFIX
                    + UserViews.SEARCH_DOCUMENT_VIEW_NAME));
    pageLink.setId(ViewAction.VISIT_DOCUMENT_VIEW.name());
    pageLink.setIcon(VaadinIcons.SEARCH);

    return pageLink;
}

@Override
public Link createAdminPagingLink(final String label,final String page, final String pageId, final String pageNr) {
    final Link pageLink = new Link(label,
            new ExternalResource(PAGE_PREFIX + page + PAGE_SEPARATOR
                    + "[" + pageNr + "]"));
    pageLink.setId(page +"ShowPage" + PAGE_SEPARATOR
            + pageNr);
    pageLink.setIcon(VaadinIcons.SERVER);

    return pageLink;
}

@Override
public Link createUserHomeViewPageLink() {
    final Link pageLink = new Link("User account:" + UserContextUtil.getUserNameFromSecurityContext(), new ExternalResource(PAGE_PREFIX
            + UserViews.USERHOME_VIEW_NAME));
        pageLink.setId(ViewAction.VISIT_USER_HOME_VIEW.name());
        pageLink.setIcon(VaadinIcons.USER);
        return pageLink;
}

protected void addResourceLinks() {
  List<String> resourceNames = repositoryService.getDeploymentResourceNames(deployment.getId());
  Collections.sort(resourceNames); // small nr of elements, so we can do it in-memory

  if (resourceNames.size() > 0) {
    Label resourceHeader = new Label(i18nManager.getMessage(Messages.DEPLOYMENT_HEADER_RESOURCES));
    resourceHeader.setWidth("95%");
    resourceHeader.addStyleName(ExplorerLayout.STYLE_H3);
    resourceHeader.addStyleName(ExplorerLayout.STYLE_DETAIL_BLOCK);
    addDetailComponent(resourceHeader);

    // resources
    VerticalLayout resourceLinksLayout = new VerticalLayout();
    resourceLinksLayout.setSpacing(true);
    resourceLinksLayout.setMargin(true, false, false, false);
    addDetailComponent(resourceLinksLayout);

    for (final String resourceName : resourceNames) {
      StreamResource.StreamSource streamSource = new StreamSource() {
        public InputStream getStream() {
          return repositoryService.getResourceAsStream(deployment.getId(), resourceName);
        }
      };
      Link resourceLink = new Link(resourceName, new StreamResource(streamSource, resourceName, ExplorerApp.get()));
      resourceLinksLayout.addComponent(resourceLink);
    }
  }
}

public VaadinExportDialog(String title) {
    super(title);

    try {
        HorizontalLayout horizontalLayout = new HorizontalLayout();
        horizontalLayout.setMargin(false);
        final PipedInputStream pipedInputStream = new PipedInputStream(pipedOutputStream);

        StreamSource ss = new StreamSource() {
               private static final long serialVersionUID = 1L;

            @Override
               public InputStream getStream() {
                VaadinExportDialog.this.close();
                   return pipedInputStream;
               }
           };
           StreamResource sr = new StreamResource(ss, "export.xml");
        sr.setMIMEType("application/octet-stream");
        sr.setCacheTime(0);
        link = new Link("Link to Download", sr);

        horizontalLayout.addComponent(link);

        setContent(horizontalLayout);

        setModal(true);
        UI.getCurrent().addWindow(this);
    } catch (IOException x) {
        x.printStackTrace();
       }
}

@Override
public void build(String title, MyBeanItem<? extends Object> beanItem)
{
    super.build(title, beanItem);

    // add link to capabilities
    Property<?> endPointProp = beanItem.getItemProperty(PROP_ENDPOINT);
    if (endPointProp != null)
    {
        String baseUrl = ((String)endPointProp.getValue()).substring(1);
        String href = baseUrl + "?service=SOS&version=2.0&request=GetCapabilities";
        Link link = new Link("Link to capabilities", new ExternalResource(href), "_blank", 0, 0, null);
        this.addComponent(link, 0);
    }
}

public static Link getGravatarImageLink(final String email) {
    final URL gravatarUrl = GravatarUtil.getGravatarUrl(email, 32);
    final Link link = new Link(null, new ExternalResource("http://www.gravatar.com/"));
    link.setStyleName("gravatar");
    link.setIcon(new ExternalResource(gravatarUrl));
    link.setWidth(32, Sizeable.Unit.PIXELS);
    link.setHeight(32, Sizeable.Unit.PIXELS);
    return link;
}

protected void addResourceLinks() {
  List<String> resourceNames = repositoryService.getDeploymentResourceNames(deployment.getId());
  Collections.sort(resourceNames); // small nr of elements, so we can do it in-memory

  if (resourceNames.size() > 0) {
    Label resourceHeader = new Label(i18nManager.getMessage(Messages.DEPLOYMENT_HEADER_RESOURCES));
    resourceHeader.setWidth("95%");
    resourceHeader.addStyleName(ExplorerLayout.STYLE_H3);
    resourceHeader.addStyleName(ExplorerLayout.STYLE_DETAIL_BLOCK);
    addDetailComponent(resourceHeader);

    // resources
    VerticalLayout resourceLinksLayout = new VerticalLayout();
    resourceLinksLayout.setSpacing(true);
    resourceLinksLayout.setMargin(true, false, false, false);
    addDetailComponent(resourceLinksLayout);

    for (final String resourceName : resourceNames) {
      StreamResource.StreamSource streamSource = new StreamSource() {
        public InputStream getStream() {
          return repositoryService.getResourceAsStream(deployment.getId(), resourceName);
        }
      };
      Link resourceLink = new Link(resourceName, new StreamResource(streamSource, resourceName, ExplorerApp.get()));
      resourceLinksLayout.addComponent(resourceLink);
    }
  }
}

public LinkField(Item item, Object propertyId) {

        String url = (String) item.getItemProperty(propertyId).getValue();
        link = new Link(url, new ExternalResource(url));
        link.setTargetName("_blank");
        setCompositionRoot(link);
    }

@Override
public Object generateCell(final Object columnId, final Item item, final Object itemId) {
    final String url = (String) item.getItemProperty(columnId).getValue();
    if (!isNullOrEmpty(url)) {
        final Link link = new Link(url, new ExternalResource(url));
        link.setTargetName("_blank");
        return link;
    } else
        return null;
}

@Override
public Object generateCell(final Object columnId, final Item item, final Object itemId) {
    final String url = (String) item.getItemProperty(columnId).getValue();
    if (!isNullOrEmpty(url)) {
        final Link link = new Link(url, new ExternalResource(MessageFormat.format("mailto:{0}", url)));
        link.setTargetName("_blank");
        return link;
    } else
        return null;
}