| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| package org.apache.cocoon.portal.layout.renderer.aspect; |
| |
| import java.util.Iterator; |
| |
| import org.apache.avalon.framework.component.Component; |
| import org.apache.avalon.framework.parameters.ParameterException; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.cocoon.portal.PortalService; |
| import org.apache.cocoon.portal.layout.Layout; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.SAXException; |
| |
| /** |
| * A renderer aspect extends a renderer with a distinct functionality. |
| * It can add a particular decoration like a border or buttons for example. |
| * A renderer aspect has to be thread safe! |
| * |
| * @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 $Id$ |
| */ |
| public interface RendererAspect |
| extends Component { |
| |
| String ROLE = RendererAspect.class.getName(); |
| |
| /** |
| * Stream out raw layout |
| */ |
| void toSAX(RendererAspectContext context, |
| Layout layout, |
| PortalService service, |
| ContentHandler handler) |
| throws SAXException; |
| |
| /** |
| * Return the aspects required for this renderer |
| * @return An iterator for the aspect descriptions or null. |
| */ |
| Iterator getAspectDescriptions(Object preparedConfiguration); |
| |
| /** |
| * Compile the configuration. |
| * A renderer aspect can "compile" the configuration in |
| * order to increase performance. |
| * If the renderer does not want to compile it should |
| * simply return the configuration. |
| * The "compiled" configuration is passed to the |
| * {@link #getAspectDescriptions(Object)} method and |
| * is available during streaming via the context object. |
| * This method can also be used for validation the configuration. |
| */ |
| Object prepareConfiguration(Parameters configuration) |
| throws ParameterException; |
| |
| boolean isRequired(); |
| } |