public Form(ValueStack stack,
    HttpServletRequest request,
    HttpServletResponse response) 
{
           
        super(stack, request, response);
}

 protected  void evaluateExtraParams() 
{
        super.evaluateExtraParams();
        //boolean isAjax = "ajax".equalsIgnoreCase(this.theme);
        if (validate != null) {
            addParameter("validate", findValue(validate, Boolean.class));
        }
        // calculate the action and namespace
        /*String action = null;
        if (this.action != null) {
            // if it isn't specified, we'll make somethig up
            action = findString(this.action);
        }
        if (Dispatcher.getInstance().isPortletSupportActive() && PortletActionContext.isPortletRequest()) {
            evaluateExtraParamsPortletRequest(namespace, action);
        } else {
            String namespace = determineNamespace(this.namespace, getStack(),
                    request);
            evaluateExtraParamsServletRequest(action, namespace, isAjax);
        }*/
        if (onsubmit != null) {
            addParameter("onsubmit", findString(onsubmit));
        }
        if (target != null) {
            addParameter("target", findString(target));
        }
        if (enctype != null) {
            addParameter("enctype", findString(enctype));
        }
        if (method != null) {
            addParameter("method", findString(method));
        }
        if (acceptcharset != null) {
            addParameter("acceptcharset", findString(acceptcharset));
        }
        // keep a collection of the tag names for anything special the templates might want to do (such as pure client
        // side validation)
        if (!parameters.containsKey("tagNames")) {
            // we have this if check so we don't do this twice (on open and close of the template)
            addParameter("tagNames", new ArrayList());
        }
}

 protected boolean evaluateNameValue() 
{
        return false;
}

 public String getDefaultOpenTemplate() 
{
        return OPEN_TEMPLATE;
}

 protected String getDefaultTemplate() 
{
        return TEMPLATE;
}

 protected int getSequence() 
{
        return sequence++;
}

Get a incrementing sequence unique to this Form component. It is used by Form component's child that might need a sequence to make them unique.

 public List getValidators(String name) 
{
        Class actionClass = (Class) getParameters().get("actionClass");
        if (actionClass == null) {
            return Collections.EMPTY_LIST;
        }
        List< Validator > all = ActionValidatorManagerFactory.getInstance().getValidators(actionClass, (String) getParameters().get("actionName"));
        List< Validator > validators = new ArrayList< Validator >();
        for (Validator validator : all) {
            if (validator instanceof FieldValidator) {
                FieldValidator fieldValidator = (FieldValidator) validator;
                if (fieldValidator.getFieldName().equals(name)) {
                    validators.add(fieldValidator);
                }
            }
        }
        return validators;
}

 protected  void populateComponentHtmlId(Form form) 
{
        boolean isAjax = "ajax".equalsIgnoreCase(this.theme);
        String action = null;
        if (this.action != null) {
            // if it isn't specified, we'll make somethig up
            action = findString(this.action);
        }
        if (id != null) {
            addParameter("id", escape(id));
        }
        // if no id given, it will be tried to generate it from the action attribute in the
        // corresponding evaluateExtraParams method
        if (Dispatcher.getInstance().isPortletSupportActive() && PortletActionContext.isPortletRequest()) {
            evaluateExtraParamsPortletRequest(namespace, action);
        } else {
            String namespace = determineNamespace(this.namespace, getStack(),
                    request);
            evaluateExtraParamsServletRequest(action, namespace, isAjax);
        }
}

The Form component determines its HTML element id as follows:-
1. if an 'id' attribute is specified.
2. if an 'action' attribute is specified, it will be used as the id.

 public  void setAcceptcharset(String acceptcharset) 
{
        this.acceptcharset = acceptcharset;
}

 public  void setAction(String action) 
{
        this.action = action;
}

 public  void setConfiguration(Configuration configuration) 
{
        this.configuration = configuration;
}

 public  void setEnableDynamicMethodInvocation(String enable) 
{
        enableDynamicMethodInvocation = "true".equals(enable);
}

 public  void setEnctype(String enctype) 
{
        this.enctype = enctype;
}

 public  void setMethod(String method) 
{
        this.method = method;
}

 public  void setNamespace(String namespace) 
{
        this.namespace = namespace;
}

 public  void setObjectFactory(ObjectFactory objectFactory) 
{
        this.objectFactory = objectFactory;
}

 public  void setOnsubmit(String onsubmit) 
{
        this.onsubmit = onsubmit;
}

 public  void setPortletMode(String portletMode) 
{
        this.portletMode = portletMode;
}

 public  void setTarget(String target) 
{
        this.target = target;
}

 public  void setValidate(String validate) 
{
        this.validate = validate;
}

 public  void setWindowState(String windowState) 
{
        this.windowState = windowState;
}