Example usage for org.apache.wicket.markup.resolver IComponentResolver resolve

Introduction

In this page you can find the example usage for org.apache.wicket.markup.resolver IComponentResolver resolve.

Prototype

Component resolve(final MarkupContainer container, final MarkupStream markupStream, final ComponentTag tag);

Source Link

Document

Try to resolve a component.

Usage

From source file:com.servoy.j2db.server.headlessclient.dataui.SortableCellViewHeaders.java

License:Open Source License

/**
 * Renders the next element of markup in the given markup stream.
 * // ww w  . jav  a2  s.c om
 * @param markupStream The markup stream
 */
private final void _renderNext(final MarkupStream markupStream) {
    // Get the current markup element
    final MarkupElement element = markupStream.get();

    // If it a tag like <wicket..> or <span wicket:id="..." >
    if ((element instanceof ComponentTag) && !markupStream.atCloseTag()) {
        // Get element as tag
        final ComponentTag tag = (ComponentTag) element;

        // Get component id
        final String id = tag.getId();

        // Get the component for the id from the given container
        final Component component = get(id);

        // Failed to find it?
        if (component != null && orderedHeaders.get(renderColumnIdx) != null) {
            if (component instanceof SortableCellViewHeader) {
                int currentIdx = markupStream.getCurrentIndex();
                renderHeader(renderColumnIdx, markupStream);
                renderColumnIdx++;
                markupStream.setCurrentIndex(currentIdx);
                markupStream.skipComponent();
            }
        } else {
            // 2rd try: Components like Border and Panel might implement
            // the ComponentResolver interface as well.
            MarkupContainer container = this;
            while (container != null) {
                if (container instanceof SortableCellViewHeaders) {
                    // we should created the corect header, use the id from the orderedHeaders
                    String headerId = orderedHeaderIds.get(renderColumnIdx);
                    renderColumnIdx++;
                    if (resolve(markupStream, tag, headerId)) {
                        return;
                    }

                }

                if (container instanceof IComponentResolver) {
                    if (((IComponentResolver) container).resolve(this, markupStream, tag)) {
                        return;
                    }
                }

                container = container.findParent(MarkupContainer.class);
            }

            // 3rd try: Try application's component resolvers
            final List<IComponentResolver> componentResolvers = getApplication().getPageSettings()
                    .getComponentResolvers();
            final Iterator<IComponentResolver> iterator = componentResolvers.iterator();
            while (iterator.hasNext()) {
                final IComponentResolver resolver = iterator.next();
                if (resolver.resolve(this, markupStream, tag)) {
                    return;
                }
            }

            if (tag instanceof WicketTag) {
                if (((WicketTag) tag).isChildTag()) {
                    markupStream.throwMarkupException("Found " + tag.toString() + " but no <wicket:extend>"); //$NON-NLS-1$ //$NON-NLS-2$
                } else {
                    markupStream.throwMarkupException("Failed to handle: " + tag.toString()); //$NON-NLS-1$
                }
            }

            // No one was able to handle the component id
            markupStream.throwMarkupException("Unable to find component with id '" + id + "' in " + this //$NON-NLS-1$//$NON-NLS-2$
                    + ". This means that you declared wicket:id=" + //$NON-NLS-1$
                    id + " in your markup, but that you either did not add the " //$NON-NLS-1$
                    + "component to your page at all, or that the hierarchy does not match."); //$NON-NLS-1$
        }
    } else {
        getResponse().write(element.toCharSequence());
        markupStream.next();
    }
}

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