* 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.

*/

* <h2>Example XML:</h2>

* <pre>

*   &lt;composite&gt;

*     &lt;named-item name="..." parameter="link-event"/&gt;

*     &lt;named-item name="..." selected="true"&gt;

*       &lt;!-- output from processing layout --&gt;

*     &lt;/named-item&gt;

*     &lt;named-item name="..." parameter="link-event"/&gt;

*     &lt;named-item name="..." parameter="link-event"/&gt;

*   &lt;/composite&gt;

* </pre>

*

* <h2>Applicable to:</h2>

* <ul>

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

* </ul>

*

* <h2>Parameters</h2>

* <table><tbody>

*  <tr><th>store</th><td></td><td>req</td><td>String</td><td><code>null</code></td></tr>

*  <tr><th>aspect-name</th><td>Aspect holding the current tab state.</td><td>req</td><td>String</td><td><code>"tab"</code></td></tr>

*  <tr><th>tag-name</th><td>Name of the tag enclosing the following output.</td>

*      <td></td><td>String</td><td><code>"composite"</code></td></tr>

*  <tr><th>root-tag</th><td>Should a tag enclosing the following output be generated?</td>

*      <td></td><td>boolean</td><td><code>true</code></td></tr>

* </tbody></table>

*

* @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: TabContentAspect.java,v 1.15 2004/04/29 07:00:49 cziegeler Exp $

*/

    extends CompositeContentAspect {

    /* (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 {

        if (layout instanceof CompositeLayout) {

            TabPreparedConfiguration config = (TabPreparedConfiguration)context.getAspectConfiguration();

            if ( config.rootTag ) {

                XMLUtils.startElement(handler, config.tagName);

            }

            AttributesImpl attributes = new AttributesImpl();

            CompositeLayout tabLayout = (CompositeLayout) layout;

            // selected tab

            Integer data = (Integer) layout.getAspectData(config.aspectName);

            int selected = data.intValue();

           

            // loop over all tabs

            for (int j = 0; j < tabLayout.getSize(); j++) {

                Item tab = tabLayout.getItem(j);

                // open named-item tag

                attributes.clear();

                if ( tab instanceof NamedItem ) {

                    attributes.addCDATAAttribute("name", String.valueOf(((NamedItem)tab).getName()));

                }

                if (j == selected) {

                    attributes.addCDATAAttribute("selected", "true");

                } else {

                    ChangeAspectDataEvent event = new ChangeAspectDataEvent(tabLayout, config.aspectName, new Integer(j));

                    attributes.addCDATAAttribute("parameter", service.getComponentManager().getLinkService().getLinkURI(event));

                }

                // add parameters

                final Iterator iter = tab.getParameters().entrySet().iterator();

                while ( iter.hasNext() ) {

                    final Map.Entry entry = (Map.Entry) iter.next();

                    attributes.addCDATAAttribute((String)entry.getKey(), (String)entry.getValue());

                }

               

                XMLUtils.startElement(handler, "named-item", attributes);

                if (j == selected) {

                    this.processLayout(tab.getLayout(), service, handler);

                }

                // close named-item tag

                XMLUtils.endElement(handler, "named-item");

            }

            if ( config.rootTag ) {

                XMLUtils.endElement(handler, config.tagName);

            }

        } else {

            throw new SAXException("Wrong layout type, TabLayout expected: " + layout.getClass().getName());

        }

    }

    /**

     * Return the aspects required for this renderer

     * @return An iterator for the aspect descriptions or null.

     */

    public Iterator getAspectDescriptions(Object configuration) {

        TabPreparedConfiguration pc = (TabPreparedConfiguration)configuration;

       

        DefaultAspectDescription desc = new DefaultAspectDescription();

        desc.setName(pc.aspectName);

        desc.setClassName("java.lang.Integer");

        desc.setPersistence(pc.store);

        desc.setAutoCreate(true);

       

        return Collections.singletonList(desc).iterator();

    }

        public String aspectName;

        public String store;

       

        public void takeValues(TabPreparedConfiguration from) {

            super.takeValues(from);

            this.aspectName = from.aspectName;

            this.store = from.store;

        }

    }

   

    /* (non-Javadoc)

     * @see org.apache.cocoon.portal.layout.renderer.aspect.RendererAspect#prepareConfiguration(org.apache.avalon.framework.parameters.Parameters)

     */

    public Object prepareConfiguration(Parameters configuration)

    throws ParameterException {

        TabPreparedConfiguration pc = new TabPreparedConfiguration();

        pc.takeValues((PreparedConfiguration)super.prepareConfiguration(configuration));

        pc.aspectName = configuration.getParameter("aspect-name", "tab");

        pc.store = configuration.getParameter("store");

        return pc;

    }

}