prototype.js and script.aculo.us

The next version of Amateras JavaScript editor supports prototype.js and script.aculo.us. These libraries are proposed in code completion proposals.

prototype.js:

script.aculo.us:

In the future version, many other JavaScript libraries will be supported!

The page auto mapping without templates

Click Framework provides the page auto mapping. This is the important feature to decrease amount of configuration.

However Click maps page classes to request-path from HTML templates. So page classes which do not have corresponded HTML template is not mapped automatically.

For example:

• pages which share a HTML template
• the page which returns JSON or file (response is written in the page class)

I'm thinking about annotations on Click Framework. How about the @Path annotation which specifies the auto mapping path to page classes.

@Path("/file-download.htm")
public class FileDonwloadPage extends Page {

  /**
   * Writes response for file downloading in this method.
   */
  @Override public void onRender() {
    HttpServletResponse res = getContext().getResponse();
    OutputStream out = res.getOutputStream();
    ...
  }

  /**
   * This method returns null to not render template,
   * because this class writes response contents for file download.
   */
  public String getPath(){
    return null;
  }
}

This is one idea of using annotation in Click Framework.

JavaScript Formatter

EclipseHTMLEditor (a part of Amateras) provides the JavaScript editor. I added JavaScript source code formatter to the JavaScript editor. We can format JavaScript source code from the context menu.

Please wait for the next release of EclipseHTMLEditor!

JJUG Cross Community Conference 2008 Spring

JJUG Cross Community Conference 2008 Spring will be held at Japan 30 Apr.

JJUG is an abbreviation of Japan Java User Group. In this conference, top Java engineers in Japan talk about hot topics in Java such as Web frameworks, EclipseLink, JAM, Scala and New Swing APIs.

I'll talk about Click Framework in this conference and join panel discussion with speakers of Grails, JRuby on Rails and Wicket.

I wish to make efforts to spread Click Framework in Japan.

File download in Click Framework

Click Framework provides FileField to upload file, however Click does not provide any support for file downloading. I made AbstractDownloadPage to download file.

Usage:

 public class SampleDownloadPage extends AbstractDownloadPage {
  public SampleDownloadPage(){
    setFileName("sample.txt");
    setContents(SampleDownloadPage.class.getResourceAsStream("sample.txt"));
  }
} 

This page class does not have a template because response is written by this class. So auto-mapping does not work for file download pages. The extended page class have to be registered to click.xml.

Click Framework + LiveValidation

Click controls provide JavaScript validation, but they are not easy to customize. Now I'm writing JavaScript validation framework for Click using LiveValidation. In the page class, ready the LivaValiator control like below:

Form form = new Form("form");
form.add(new TextField("name", true));
form.add(new PasswordField("password", true));
form.add(new Submit("login"));

addControl(new LivaValidator("validator", form));

In the page template, generates LiveValidation JavaScript code by the LiveValidator control:

<body>
  $form
  <script type="text/javascript">
    $validator
  </script>
</body>

We can also add customized validation rules by use of Validate.Custom.

OVal: The simple validation framework for Java

OVal is the simple validation framework for Java. You can specify validation rules using annotations.

public class Person {
  @NotNull
  public String name;
}

Usage:

Validator v = new Validator();

Person p = new Person();
for(ConstraintViolation error: v.validate(p)){
  System.out.println(error.getMessage());
}

OVal can switch validation rules by profiles.

public class Person {
  @NotNull(profiles={"profile1"})
  public String name;
  
  @NotNull(profiles={"profile1", "profile2"})
  public String email;
}

Switch profiles like following:

// Enable all profiles
v.enableAllProfiles();
// Enable a specified profile
v.enableProfile("profile1");

// Disable all profiles
v.disableAllProfiles();
// Disable a specified profile
v.disableProfile("profile1");