H:messages for components only.

Question

Hello,
How can I display messages releated to all components on a page (not global messages) with just one JSF tag? Is it possible?
I want to place such tag on the page top, but I don't need global messages.
Thanks in advance.
Oleg.

Answer 1

Hmm... I'm not sure. I've looked into the MessagesRenderer and found
        String clientId = ((UIMessages) component).getFor();
        // if no clientId was included
        if (clientId == null) {
            // and the author explicitly only wants global messages
            if (messages.isGlobalOnly()) {
                // make it so only global messages get displayed.
                clientId = "";
        //"for" attribute optional for Messages
        Iterator messageIter = getMessageIter(context, clientId, component);
        assert(messageIter != null);
        if (!messageIter.hasNext()) {
        }In the HTMLBasicRenderer I found
    protected Iterator getMessageIter(FacesContext context,
                                      String forComponent,
                                      UIComponent component) {
        Iterator messageIter;
        // Attempt to use the "for" attribute to locate
        // messages.  Three possible scenarios here:
        // 1. valid "for" attribute - messages returned
        //    for valid component identified by "for" expression.
        // 2. zero length "for" expression - global errors
        //    not associated with any component returned
        // 3. no "for" expression - all messages returned.
        if (null != forComponent) {
            if (forComponent.length() == 0) {
                messageIter = context.getMessages(null);
            } else {
                UIComponent result = getForComponent(context, forComponent,
                                                     component);
                if (result == null) {
                    messageIter = Collections.EMPTY_LIST.iterator();
                } else {
                    messageIter =
                          context.getMessages(result.getClientId(context));
        } else {
            messageIter = context.getMessages();
        return messageIter;
    }You see, it's not true. In this case we have forComponent = null and ALL messages will be displayed. Right?
Best regards.
Oleg.
Edited by: ova2 on Dec 16, 2009 7:18 AM