Create an own tag h:name-Tag to replace h:CommandButton

Question

Hello,
I have 2 questions :
1 - How can create a personal tag in a JSF application?
2 - How can I do to make this application :
an example :
I have 3 buttons A, B and C (<h:CommandButton>) .
That I want to do :
when I click on A, the value of B is replaced by D.
when I click on B, the value of B is replaced by D and the value of C is replaced by A. etc...
So the parameter action="..." for the each <h:name-Tag> call other tags i the same page.
At the end, I want to create this tag and include it in the form of myTag.jar to be used in my project.
Thank you

Answer 1

In the setProperties method, you've got to resolve the valuebinding (#{blah.whatever}) to get the actual value. But you only want to do that if the attribute is set to a valuebinding.
Here's an example:
      * @see javax.faces.webapp.UIComponentTag#setProperties(UIComponent)
     protected void setProperties(UIComponent component) {
          super.setProperties(component);
          //Set the field reference property
          if (fieldRef != null) {
               if (UIComponentTag.isValueReference(fieldRef)) {
                    ValueBinding vb = getFacesContext().getApplication().
                         createValueBinding(fieldRef);
                    component.setValueBinding("fieldRef", vb);
               } else {
                    component.getAttributes().put("fieldRef", fieldRef);
     }This example shows how to determine if the "fieldRef" attribute is a value binding, and extracts the value accordingly. But there's one more step. In your component class, or anywhere you access the attributes of your custom tag, use the following code:
     public String getFieldRef() {
          if (fieldRef != null)
               return fieldRef;
          ValueBinding vb = getValueBinding("fieldRef");
          if (vb != null)
               return (String)vb.getValue(getFacesContext());
          else
               return null;
     }The above snippet is what you would put in your custom component getter method.
JSF is open source. Something I found very helpful while learning how to create custom components was looking at how the JSF developers created theirs. You should go ahead and download the JSF source code.
CowKing