Renderer


1   /*
2    * Copyright 1999-2002,2004 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.cocoon.portal.layout.renderer;
17  
18  import java.util.Iterator  ;
19  
20  import org.apache.avalon.framework.component.Component;
21  import org.apache.cocoon.portal.PortalService;
22  import org.apache.cocoon.portal.layout.Layout;
23  import org.xml.sax.ContentHandler  ;
24  import org.xml.sax.SAXException  ;
25  
26  /**
27   * A renderer is responsible for rendering a layout object.
28   * 
29   * @author <a HREF="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a>
30   * @author <a HREF="mailto:volker.schmitt@basf-it-services.com">Volker Schmitt</a>
31   * 
32   * @version CVS $Id: Renderer.java 30932 2004-07-29 17:35:38Z vgritsenko $
33   */
34  public interface Renderer 
35      extends Component {
36      
37      String   ROLE = Renderer.class.getName();
38      
39      /**
40       * Stream out raw layout 
41       */
42      void toSAX(Layout layout, PortalService service, ContentHandler   handler)
43      throws SAXException  ;
44  
45      /**
46       * Return the aspects required for this renderer.
47       * This method always returns an iterator even if no descriptions are
48       * available.
49       */
50      Iterator   getAspectDescriptions();
51  }
52

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