Examples of MarkupStream

org.apache.wicket.markup.MarkupStream

A stream of {@link org.apache.wicket.markup.MarkupElement}s, subclasses of which are {@link org.apache.wicket.markup.ComponentTag} and {@link org.apache.wicket.markup.RawMarkup}. A markup stream has a current index in the list of markup elements. The next markup element can be retrieved and the index advanced by calling next(). If the index hits the end, hasMore() will return false.

The current markup element can be accessed with get() and as a ComponentTag with getTag().

The stream can be sought to a particular location with setCurrentIndex().

Convenience methods also exist to skip component tags (and any potentially nested markup) or raw markup.

Several boolean methods of the form at*() return true if the markup stream is positioned at a tag with a given set of characteristics.

The resource from which the markup was loaded can be retrieved with getResource(). @author Jonathan Locke

    if (markup == null)
    {
      throw new MarkupException("Markup not found. Component: " + toString());
    }


    final MarkupStream markupStream = new MarkupStream(markup);


    // Get mutable copy of next tag
    final ComponentTag openTag = markupStream.getTag();
    final ComponentTag tag = openTag.mutable();


    // Call any tag handler
    onComponentTag(tag);


    // If we're an openclose tag
    if (!tag.isOpenClose() && !tag.isOpen())
    {
      // We were something other than <tag> or <tag/>
      markupStream.throwMarkupException("Method renderComponent called on bad markup element: " +
        tag);
    }


    if (tag.isOpenClose() && openTag.isOpen())
    {
      markupStream.throwMarkupException("You can not modify a open tag to open-close: " + tag);
    }


    try
    {
      // Render open tag
      if (getRenderBodyOnly() == false)
      {
        renderComponentTag(tag);
      }
      markupStream.next();


      // Render the body only if open-body-close. Do not render if open-close.
      if (tag.isOpen())
      {
        // Render the body. The default strategy will simply call the component's

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Examples of MarkupStream

Examples of org.apache.wicket.markup.MarkupStream