* Copyright 1999-2002,2004 The Apache Software Foundation.

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

*      http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

* This aspect directly invokes the coplet adapter to stream out the coplet content.

* An alternative solution is to generate only cinclude tags by using the

* {@link org.apache.cocoon.portal.layout.renderer.aspect.impl.CIncludeCopletAspect}

* and include the coplet contents later. That would allow caching up to the point

* of the cinclude transformer.

*

* <h2>Example XML:</h2>

* <pre>

* &lt;content&gt;

*   &lt;!-- content streamed from coplet --&gt;

* &lt;/content&gt;

* </pre>

*

* <h2>Applicable to:</h2>

* <ul>

*  <li>{@link org.apache.cocoon.portal.layout.impl.CopletLayout}</li>

* </ul>

*

* @author <a href="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a>

* @author <a href="mailto:volker.schmitt@basf-it-services.com">Volker Schmitt</a>

*

* @version CVS $Id: DefaultCopletAspect.java,v 1.5 2004/04/25 20:09:34 haul Exp $

*/

  /* (non-Javadoc)

   * @see org.apache.cocoon.portal.layout.renderer.RendererAspect#toSAX(org.apache.cocoon.portal.layout.renderer.RendererAspectContext, org.apache.cocoon.portal.layout.Layout, org.apache.cocoon.portal.PortalService, org.xml.sax.ContentHandler)

   */

  public void toSAX(RendererAspectContext context,

                    Layout layout,

                    PortalService service,

                    ContentHandler handler)

  throws SAXException {

       

        XMLUtils.startElement(handler, "content");

        CopletInstanceData cid = ((CopletLayout)layout).getCopletInstanceData();

        final String adapterName = cid.getCopletData().getCopletBaseData().getCopletAdapterName();

        CopletAdapter copletAdapter = null;

        ServiceSelector adapterSelector = null;

        try {

            adapterSelector = (ServiceSelector) this.manager.lookup(CopletAdapter.ROLE + "Selector");

            copletAdapter = (CopletAdapter) adapterSelector.select(adapterName);

            copletAdapter.toSAX(cid, new IncludeXMLConsumer(handler));

        } catch (ServiceException ce) {

            throw new SAXException("Unable to lookup component.", ce);

        } finally {

            if (null != copletAdapter) {

                adapterSelector.release(copletAdapter);

            }

            this.manager.release(adapterSelector);

        }

        XMLUtils.endElement(handler, "content");

        context.invokeNext(layout, service, handler);

  }

}