01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.cocoon.portal.layout.renderer;
18:
19: import java.util.Iterator;
20:
21: import org.apache.avalon.framework.component.Component;
22: import org.apache.cocoon.portal.PortalService;
23: import org.apache.cocoon.portal.layout.Layout;
24: import org.xml.sax.ContentHandler;
25: import org.xml.sax.SAXException;
26:
27: /**
28: * A renderer is responsible for rendering a layout object.
29: *
30: * @author <a href="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a>
31: * @author <a href="mailto:volker.schmitt@basf-it-services.com">Volker Schmitt</a>
32: *
33: * @version CVS $Id: Renderer.java 433543 2006-08-22 06:22:54Z crossley $
34: */
35: public interface Renderer extends Component {
36:
37: String ROLE = Renderer.class.getName();
38:
39: /**
40: * Stream out raw layout
41: */
42: void toSAX(Layout layout, PortalService service,
43: ContentHandler handler) 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: }
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