| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * Licensed 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.webapps.session.transformation; |
| |
| import org.apache.avalon.framework.service.ServiceException; |
| import org.apache.cocoon.ProcessingException; |
| import org.apache.cocoon.environment.Session; |
| import org.apache.cocoon.transformation.AbstractSAXTransformer; |
| import org.apache.cocoon.webapps.session.ContextManager; |
| import org.apache.cocoon.webapps.session.FormManager; |
| import org.apache.cocoon.webapps.session.SessionManager; |
| |
| /** |
| * This class is the basis for all session transformers. |
| * |
| * @author <a href="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a> |
| * @version CVS $Id: AbstractSessionTransformer.java,v 1.4 2004/03/05 13:02:23 bdelacretaz Exp $ |
| */ |
| public abstract class AbstractSessionTransformer |
| extends AbstractSAXTransformer { |
| |
| private SessionManager sessionManager; |
| private FormManager formManager; |
| private ContextManager contextManager; |
| |
| /** |
| * Get the SessionManager component |
| */ |
| protected SessionManager getSessionManager() |
| throws ProcessingException { |
| if (this.sessionManager == null) { |
| try { |
| this.sessionManager = (SessionManager)this.manager.lookup(SessionManager.ROLE); |
| } catch (ServiceException ce) { |
| throw new ProcessingException("Error during lookup of SessionManager component.", ce); |
| } |
| } |
| return this.sessionManager; |
| } |
| |
| /** |
| * Get the ContextManager component |
| */ |
| protected ContextManager getContextManager() |
| throws ProcessingException { |
| if (this.contextManager == null) { |
| try { |
| this.contextManager = (ContextManager)this.manager.lookup(ContextManager.ROLE); |
| } catch (ServiceException ce) { |
| throw new ProcessingException("Error during lookup of ContextManager component.", ce); |
| } |
| } |
| return this.contextManager; |
| } |
| |
| /** |
| * Get the FormManager component |
| */ |
| protected FormManager getFormManager() |
| throws ProcessingException { |
| if (this.formManager == null) { |
| try { |
| this.formManager = (FormManager)this.manager.lookup(FormManager.ROLE); |
| } catch (ServiceException ce) { |
| throw new ProcessingException("Error during lookup of FormManager component.", ce); |
| } |
| } |
| return this.formManager; |
| } |
| |
| /** |
| * Recycle this component. |
| */ |
| public void recycle() { |
| super.recycle(); |
| this.manager.release( this.sessionManager); |
| this.manager.release( this.formManager); |
| this.manager.release( this.contextManager); |
| this.sessionManager = null; |
| this.formManager = null; |
| this.contextManager = null; |
| } |
| |
| /** |
| * Get the current session if available or return <code>null</code>. |
| * @return The Session object or null. |
| */ |
| public Session getSession() |
| throws ProcessingException { |
| return this.getSessionManager().getSession(false); |
| } |
| |
| } |