Examples of org.apache.wicket.markup.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

   *            message that will be used for exceptions
   */
  public final void renderAssociatedMarkup(final String openTagName, final String exceptionMessage)
  {
    // Get associated markup file for the Border or Panel component
    final MarkupStream associatedMarkupStream = new MarkupStream(getMarkup(null));


    // Get open tag in associated markup of border component
    MarkupElement elem = associatedMarkupStream.get();
    if ((elem instanceof ComponentTag) == false)
    {
      associatedMarkupStream.throwMarkupException("Expected the open tag. " +
        exceptionMessage);
    }


    // Check for required open tag name
    ComponentTag associatedMarkupOpenTag = (ComponentTag)elem;
    if (!((associatedMarkupOpenTag != null) && associatedMarkupOpenTag.isOpen() && (associatedMarkupOpenTag instanceof WicketTag)))
    {
      associatedMarkupStream.throwMarkupException(exceptionMessage);
    }


    try
    {
      setIgnoreAttributeModifier(true);
      renderComponentTag(associatedMarkupOpenTag);
      associatedMarkupStream.next();


      String className = null;


      final boolean outputClassName = getApplication().getDebugSettings()
        .isOutputMarkupContainerClassName();

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    buffer.append(super.toString(detailed));
    if (detailed)
    {
      if (getMarkup() != null)
      {
        buffer.append(", markup = ").append(new MarkupStream(getMarkup()).toString());
      }


      if (children_size() != 0)
      {
        buffer.append(", children = ");

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  {
    // Markup must be available
    IMarkupFragment markup = getMarkup();
    if ((markup != null) && (markup.size() > 1))
    {
      MarkupStream stream = new MarkupStream(markup);


      // Skip the first component tag which already belongs to 'this' container
      if (stream.skipUntil(ComponentTag.class))
      {
        stream.next();
      }


      // Search for <wicket:xxx> in the remaining markup and try to resolve the component
      while (stream.skipUntil(ComponentTag.class))
      {
        ComponentTag tag = stream.getTag();
        if (tag.isOpen() || tag.isOpenClose())
        {
          if (tag instanceof WicketTag)
          {
            Component component = ComponentResolvers.resolve(this, stream, tag, null);
            if ((component != null) && (component.getParent() == null))
            {
              if (component.getId().equals(tag.getId()) == false)
              {
                // make sure we are able to get() the component during rendering
                tag.setId(component.getId());
                tag.setModified(true);
              }
              add(component);
            }
          }


          if (tag.isOpen())
          {
            stream.skipToMatchingCloseTag(tag);
          }
        }
        stream.next();
      }
    }
  }

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  private static boolean compareMarkup(final String a, final String b)
  {
    try
    {
      // Parse a and b into markup and compare
      final MarkupStream amarkup = new MarkupStream(new MarkupParser(a).parse());
      final MarkupStream bmarkup = new MarkupStream(new MarkupParser(b).parse());
      return amarkup.equalTo(bmarkup);
    }
    catch (IOException e)
    {
      e.printStackTrace();

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  {
    // Configure response object with locale and content type
    configureResponse();


    // Loop through the markup in this container
    MarkupStream markupStream = new MarkupStream(getMarkup());
    renderAll(markupStream, null);
  }

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    return new PanelMarkupSourcingStrategy()
    {
      @Override
      public IMarkupFragment getMarkup(final MarkupContainer parent, final Component child)
      {
        MarkupStream markup = parent.getAssociatedMarkupStream(true);
        markup.skipRawMarkup();
        return markup.getMarkupFragment();
      }


      @Override
      public void onComponentTagBody(Component component, MarkupStream markupStream,
        ComponentTag openTag)

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   */
  @Override
  protected void onRender()
  {
    // Loop through the markup in this container
    MarkupStream markupStream = new MarkupStream(getMarkup());
    renderAll(markupStream, null);
  }

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    {
      throw new MarkupNotFoundException("Markup not found for Component: " + toString());
    }


    // MarkupStream is an Iterator for the markup
    MarkupStream markupStream = new MarkupStream(markup);


    // Flag: we stated the render process
    markRendering(true);


    MarkupElement elem = markup.get(0);

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    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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            .append(isVersioned());
        }


        if (markup != null)
        {
          buffer.append(", markup = ").append(new MarkupStream(getMarkup()).toString());
        }
      }


      buffer.append(']');

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