| /* |
| * 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 org.apache.avalon.framework.service.ServiceException; |
| import org.apache.avalon.framework.service.ServiceSelector; |
| import org.apache.cocoon.portal.PortalService; |
| import org.apache.cocoon.portal.coplet.CopletInstanceData; |
| import org.apache.cocoon.portal.coplet.adapter.CopletAdapter; |
| import org.apache.cocoon.portal.layout.Layout; |
| import org.apache.cocoon.portal.layout.impl.CopletLayout; |
| import org.apache.cocoon.portal.layout.renderer.aspect.RendererAspectContext; |
| import org.apache.cocoon.xml.IncludeXMLConsumer; |
| import org.apache.cocoon.xml.XMLUtils; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.SAXException; |
| |
| /** |
| * This aspect directly invokes the coplet adapter to stream out the coplet content. |
| * An alternative solution is to generate only cinclude tags by using the |
| * {@link org.apache.cocoon.portal.layout.renderer.aspect.impl.CIncludeCopletAspect} |
| * and include the coplet contents later. That would allow caching up to the point |
| * of the cinclude transformer. |
| * |
| * <h2>Example XML:</h2> |
| * <pre> |
| * <content> |
| * <!-- content streamed from coplet --> |
| * </content> |
| * </pre> |
| * |
| * <h2>Applicable to:</h2> |
| * <ul> |
| * <li>{@link org.apache.cocoon.portal.layout.impl.CopletLayout}</li> |
| * </ul> |
| * |
| * @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 class DefaultCopletAspect extends AbstractAspect { |
| |
| /* (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 (!(context.isRendering())) { |
| context.invokeNext(layout, service, handler); |
| return; |
| } |
| |
| XMLUtils.startElement(handler, "content"); |
| CopletInstanceData cid = ((CopletLayout)layout).getCopletInstanceData(); |
| |
| final String adapterName = cid.getCopletData().getCopletBaseData().getCopletAdapterName(); |
| CopletAdapter copletAdapter = null; |
| ServiceSelector adapterSelector = null; |
| try { |
| adapterSelector = (ServiceSelector) this.manager.lookup(CopletAdapter.ROLE + "Selector"); |
| copletAdapter = (CopletAdapter) adapterSelector.select(adapterName); |
| copletAdapter.toSAX(cid, new IncludeXMLConsumer(handler)); |
| } catch (ServiceException ce) { |
| throw new SAXException("Unable to lookup component.", ce); |
| } finally { |
| if (null != copletAdapter) { |
| adapterSelector.release(copletAdapter); |
| } |
| this.manager.release(adapterSelector); |
| } |
| |
| XMLUtils.endElement(handler, "content"); |
| context.invokeNext(layout, service, handler); |
| } |
| |
| } |