| package org.apache.turbine.services.velocity; |
| |
| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2001-2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" and |
| * "Apache Turbine" must not be used to endorse or promote products |
| * derived from this software without prior written permission. For |
| * written permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * "Apache Turbine", nor may "Apache" appear in their name, without |
| * prior written permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| import java.io.OutputStream; |
| import java.io.Writer; |
| |
| import org.apache.turbine.pipeline.PipelineData; |
| import org.apache.turbine.services.TurbineServices; |
| import org.apache.turbine.util.RunData; |
| |
| import org.apache.velocity.context.Context; |
| |
| /** |
| * This is a simple static accessor to common Velocity tasks such as |
| * getting an instance of a context as well as handling a request for |
| * processing a template. |
| * <pre> |
| * Context context = TurbineVelocity.getContext(data); |
| * context.put("message", "Hello from Turbine!"); |
| * String results = TurbineVelocity.handleRequest(context, "helloWorld.vm"); |
| * data.getPage().getBody().addElement(results); |
| * </pre> |
| * |
| * @author <a href="mailto:john.mcnally@clearink.com">John D. McNally</a> |
| * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a> |
| * @author <a href="mailto:jvanzyl@periapt.com.com">Jason van Zyl</a> |
| * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a> |
| * @version $Id$ |
| */ |
| public abstract class TurbineVelocity |
| { |
| /** |
| * Utility method for accessing the service |
| * implementation |
| * |
| * @return a VelocityService implementation instance |
| */ |
| public static VelocityService getService() |
| { |
| return (VelocityService) TurbineServices |
| .getInstance().getService(VelocityService.SERVICE_NAME); |
| } |
| |
| /** |
| * This allows you to pass in a context and a path to a template |
| * file and then grabs an instance of the velocity service and |
| * processes the template and returns the results as a String |
| * object. |
| * |
| * @param context A Context. |
| * @param template The path for the template files. |
| * @return A String. |
| * @exception Exception a generic exception. |
| */ |
| public static String handleRequest(Context context, String template) |
| throws Exception |
| { |
| return getService().handleRequest(context, template); |
| } |
| |
| /** |
| * Process the request and fill in the template with the values |
| * you set in the Context. |
| * |
| * @param context A Context. |
| * @param template A String with the filename of the template. |
| * @param out A OutputStream where we will write the process template as |
| * a String. |
| * @exception Exception a generic exception. |
| */ |
| public static void handleRequest(Context context, String template, |
| OutputStream out) |
| throws Exception |
| { |
| getService().handleRequest(context, template, out); |
| } |
| |
| /** |
| * Process the request and fill in the template with the values |
| * you set in the Context. |
| * |
| * @param context A Context. |
| * @param template A String with the filename of the template. |
| * @param writer A Writer where we will write the process template as |
| * a String. |
| * @exception Exception a generic exception. |
| */ |
| public static void handleRequest(Context context, |
| String template, |
| Writer writer) |
| throws Exception |
| { |
| getService().handleRequest(context, template, writer); |
| } |
| |
| /** |
| * This returns a Context that you can pass into handleRequest |
| * once you have populated it with information that the template |
| * will know about. |
| * @deprecated Use the PipelineData version instead. |
| * @param data A Turbine RunData. |
| * @return A Context. |
| */ |
| public static Context getContext(RunData data) |
| { |
| return getService().getContext(data); |
| } |
| |
| /** |
| * This returns a Context that you can pass into handleRequest |
| * once you have populated it with information that the template |
| * will know about. |
| * |
| * @param data A Turbine RunData. |
| * @return A Context. |
| */ |
| public static Context getContext(PipelineData pipelineData) |
| { |
| return getService().getContext(pipelineData); |
| } |
| |
| /** |
| * This method returns a blank Context object, which |
| * also contains the global context object. Do not use |
| * this method if you need an empty context object! Use |
| * getNewContext for this. |
| * |
| * @return A WebContext. |
| */ |
| public static Context getContext() |
| { |
| return getService().getContext(); |
| } |
| |
| /** |
| * This method returns a new, empty Context object. |
| * |
| * @return A WebContext. |
| */ |
| public static Context getNewContext() |
| { |
| return getService().getNewContext(); |
| } |
| |
| /** |
| * Performs post-request actions (releases context |
| * tools back to the object pool). |
| * |
| * @param context a Velocity Context |
| */ |
| public static void requestFinished(Context context) |
| { |
| getService().requestFinished(context); |
| } |
| } |