Java SwingBuilder : first support for validations, inching towards 0.1 release

I just committed the first working code that has some integrated validator logic. Latest code drop available as usual on javabuilders.org.

Just like with binding, it is a new root node in the YAML file:

JFrame(name=frame,title=Binding Frame,size=packed):
content:
   - JLabel(name=fnLbl, text="First name:",labelFor=fName)
   - JTextField(name=fName)
   - JLabel(name=lnLbl, text="Last name:", labelFor=lName)
   - JTextField(name=lName)
   - JButton(name=ok, text=OK, onAction=(validateInput,save,cancel))
   - JButton(name=cancel, text=Cancel, onAction=cancel)
layout: |
   []      [grow,200px]
   >fnLbl  fName
   >lnLbl  lName    
   >ok+*=1,cancel=1      [grow,bottom]
bind:
- firstName: fName.text
- lastName: lName.text
validate:
- fName.text: {label: First Name, mandatory: true, minLength : 5}

Right now it only supports "mandatory" and "minLength", but shortly I will be adding all the validator routines supported by Apache Commons Validators:
http://commons.apache.org/validator/apidocs/org/apache/commons/validator/routines/package-summary.html#package_description

In the above example, if the First name field is missing or less than 5 characters,

it will display a nice error dialog to inform the user:


At this point, the validation logic still needs to be called manually from the Java side:

private final BuildResult result = SwingBuilder.build(this);

public boolean validateInput() {
return result.validate();
}

but I will be looking into automating this soon.

You can see the full YAML and Java here:
http://code.google.com/p/javabuilders/source/browse/trunk/org.javabuilders.swing/samples/org/javabuilders/swing/samples/binding/BindingFrame1.yaml
http://code.google.com/p/javabuilders/source/browse/trunk/org.javabuilders.swing/samples/org/javabuilders/swing/samples/binding/BindingFrame1.java

Happy building! Once this is done, an official 0.1 release will finally arrive.