| /* |
| * 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.impl; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.avalon.framework.configuration.Configuration; |
| import org.apache.avalon.framework.configuration.ConfigurationException; |
| import org.apache.avalon.framework.parameters.ParameterException; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.avalon.framework.service.ServiceException; |
| import org.apache.avalon.framework.service.ServiceSelector; |
| import org.apache.cocoon.portal.layout.renderer.aspect.RendererAspect; |
| |
| /** |
| * This chain holds all configured renderer aspects for one renderer. |
| * |
| * <h2>Configuration</h2> |
| * <table><tbody> |
| * <tr><th>aspect</th> |
| * <td>Multiple aspect renderer configurations. Required attribute |
| * <code>type</code>. Nested configuration must contain parameters |
| * for aspect rederer. |
| * </td> |
| * <td>req</td><td>Configuration</td><td><code>null</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 $Id$ |
| */ |
| public final class RendererAspectChain { |
| |
| protected List aspects = new ArrayList(3); |
| |
| protected List configs = new ArrayList(3); |
| |
| protected List aspectDescriptions = new ArrayList(2); |
| |
| private boolean isRequired = false; |
| |
| public void configure(ServiceSelector selector, Configuration conf) |
| throws ConfigurationException { |
| if ( conf != null ) { |
| Configuration[] aspects = conf.getChildren("aspect"); |
| if ( aspects != null ) { |
| for(int i=0; i < aspects.length; i++) { |
| final Configuration current = aspects[i]; |
| final String role = current.getAttribute("type"); |
| try { |
| RendererAspect rAspect = (RendererAspect) selector.select(role); |
| this.aspects.add(rAspect); |
| if (rAspect.isRequired()) { |
| isRequired = true; |
| } |
| Parameters aspectConfiguration = Parameters.fromConfiguration(current); |
| Object compiledConf = rAspect.prepareConfiguration(aspectConfiguration); |
| this.configs.add(compiledConf); |
| |
| Iterator descriptionIterator = rAspect.getAspectDescriptions(compiledConf); |
| if ( descriptionIterator != null ) { |
| while ( descriptionIterator.hasNext() ) { |
| this.aspectDescriptions.add( descriptionIterator.next() ); |
| } |
| } |
| } catch (ParameterException pe) { |
| throw new ConfigurationException("Unable to configure renderer aspect " + role, pe); |
| } catch (ServiceException se) { |
| throw new ConfigurationException("Unable to lookup aspect " + role, se); |
| } |
| } |
| } |
| } else { |
| throw new ConfigurationException("No aspects configured"); |
| } |
| } |
| |
| public Iterator getIterator() { |
| return this.aspects.iterator(); |
| } |
| |
| public Iterator getConfigIterator() { |
| return this.configs.iterator(); |
| } |
| |
| public Iterator getAspectDescriptionIterator() { |
| return this.aspectDescriptions.iterator(); |
| } |
| |
| public void dispose(ServiceSelector selector) { |
| Iterator i = this.aspects.iterator(); |
| while (i.hasNext()) { |
| selector.release(i.next()); |
| } |
| this.aspects.clear(); |
| } |
| |
| public boolean isRequired() { |
| return this.isRequired; |
| } |
| } |