| package org.apache.turbine.modules.screens; |
| |
| /* ==================================================================== |
| * 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.util.Map; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import org.apache.ecs.ConcreteElement; |
| |
| import org.apache.turbine.modules.Screen; |
| import org.apache.turbine.modules.ScreenLoader; |
| import org.apache.turbine.pipeline.PipelineData; |
| |
| import org.apache.turbine.services.template.TurbineTemplate; |
| |
| import org.apache.turbine.util.RunData; |
| |
| /** |
| * Template Screen. |
| * |
| * Base Template Screens should extend this class and override the |
| * buildTemplate() method. Users of the particular service can then |
| * override the doBuildTemplate() for any specific pre-processing. |
| * You can also override the doBuild() method in order to add extra |
| * functionality to your system, but you need to make sure to at least |
| * duplicate the existing functionality in order for things to work. |
| * Look at the code for the doBuild() method to get an idea of what is |
| * going on there (it is quite simple really). |
| * |
| * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a> |
| * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> |
| * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a> |
| * @version $Id$ |
| */ |
| public abstract class TemplateScreen |
| extends Screen |
| { |
| /** Logging */ |
| protected Log log = LogFactory.getLog(this.getClass()); |
| |
| /** |
| * This method should be overidden by subclasses that wish to add |
| * specific business logic. |
| * |
| * @deprecated Use PipelineData version instead. |
| * @param data Turbine information. |
| * @exception Exception A generic exception. |
| */ |
| protected abstract void doBuildTemplate(RunData data) |
| throws Exception; |
| |
| /** |
| * This method should be overidden by subclasses that wish to add |
| * specific business logic. |
| * Should revert to abstract when RunData has gone. |
| * @param data Turbine information. |
| * @exception Exception A generic exception. |
| */ |
| protected void doBuildTemplate(PipelineData pipelineData) |
| throws Exception |
| { |
| RunData data = (RunData) getRunData(pipelineData); |
| doBuildTemplate(data); |
| } |
| |
| |
| /** |
| * This method should be implemented by Base template classes. It |
| * should contain the specific template service code to generate |
| * the template. |
| * |
| * @deprecated Use PipelineData version instead. |
| * @param data Turbine information. |
| * @return A ConcreteElement. |
| * @exception Exception A generic exception. |
| */ |
| public abstract ConcreteElement buildTemplate(RunData data) |
| throws Exception; |
| |
| /** |
| * This method should be implemented by Base template classes. It |
| * should contain the specific template service code to generate |
| * the template. |
| * Should revert to abstract when RunData goes. |
| * @param data Turbine information. |
| * @return A ConcreteElement. |
| * @exception Exception A generic exception. |
| */ |
| public ConcreteElement buildTemplate(PipelineData pipelineData) |
| throws Exception |
| { |
| RunData data = (RunData) getRunData(pipelineData); |
| return buildTemplate(data); |
| } |
| |
| |
| /** |
| * This method can be overridden to write code that executes when |
| * the template has been built (called from a finally clause, so |
| * executes regardless of whether an exception is thrown or not) |
| * |
| * @deprecated Use PipelineData version instead. |
| */ |
| protected void doPostBuildTemplate(RunData data) |
| { |
| // empty |
| } |
| |
| /** |
| * This method can be overridden to write code that executes when |
| * the template has been built (called from a finally clause, so |
| * executes regardless of whether an exception is thrown or not) |
| */ |
| protected void doPostBuildTemplate(PipelineData pipelineData) |
| { |
| // empty |
| } |
| |
| |
| /** |
| * This method is called by the Screenloader to construct the |
| * Screen. |
| * |
| * @deprecated Use PipelineData version instead. |
| * @param data Turbine information. |
| * @return A ConcreteElement. |
| * @exception Exception A generic exception. |
| */ |
| protected ConcreteElement doBuild(RunData data) |
| throws Exception |
| { |
| ConcreteElement out = null; |
| |
| try |
| { |
| doBuildTemplate(data); |
| out = buildTemplate(data); |
| } |
| finally |
| { |
| doPostBuildTemplate(data); |
| } |
| |
| return out; |
| } |
| |
| /** |
| * This method is called by the Screenloader to construct the |
| * Screen. |
| * |
| * @param data Turbine information. |
| * @return A ConcreteElement. |
| * @exception Exception A generic exception. |
| */ |
| protected ConcreteElement doBuild(PipelineData pipelineData) |
| throws Exception |
| { |
| ConcreteElement out = null; |
| |
| try |
| { |
| doBuildTemplate(pipelineData); |
| out = buildTemplate(pipelineData); |
| } |
| finally |
| { |
| doPostBuildTemplate(pipelineData); |
| } |
| |
| return out; |
| } |
| |
| |
| |
| /** |
| * This method is used when you want to short circuit a Screen and |
| * change the template that will be executed next. <b>Note that the current |
| * context will be applied to the next template that is executed. |
| * If you want to have the context executed for the next screen, |
| * to be the same one as the next screen, then you should use the |
| * TemplateScreen.doRedirect() method.</b> |
| * |
| * @deprecated Use PipelineData version instead. |
| * @param data Turbine information. |
| * @param template The name of the next template. |
| */ |
| public static void setTemplate(RunData data, String template) |
| { |
| data.getTemplateInfo().setScreenTemplate(template); |
| try |
| { |
| // We have do call getScreenTemplate because of the path |
| // separator. |
| data.getTemplateInfo().setLayoutTemplate( |
| TurbineTemplate.getLayoutTemplateName( |
| data.getTemplateInfo().getScreenTemplate())); |
| } |
| catch (Exception e) |
| { |
| // Nothing to do. |
| } |
| } |
| |
| /** |
| * This method is used when you want to short circuit a Screen and |
| * change the template that will be executed next. <b>Note that the current |
| * context will be applied to the next template that is executed. |
| * If you want to have the context executed for the next screen, |
| * to be the same one as the next screen, then you should use the |
| * TemplateScreen.doRedirect() method.</b> |
| * |
| * @param data Turbine information. |
| * @param template The name of the next template. |
| */ |
| public static void setTemplate(PipelineData pipelineData, String template) |
| { |
| //Map runDataMap = (Map) pipelineData.get(RunData.class); |
| //RunData data = (RunData)runDataMap.get(RunData.class); |
| RunData data = (RunData)pipelineData; |
| setTemplate(data, template); |
| } |
| |
| /** |
| * You can call this within a Screen to cause an internal redirect |
| * to happen. It essentially allows you to stop execution in one |
| * Screen and instantly execute another Screen. Don't worry, this |
| * does not do a HTTP redirect and also if you have anything added |
| * in the Context, it will get carried over. |
| * |
| * <p> |
| * |
| * This class is useful if you have a Screen that submits to |
| * another Screen and you want it to do error validation before |
| * executing the other Screen. If there is an error, you can |
| * doRedirect() back to the original Screen. |
| * |
| * @deprecated Use PipelineData version instead. |
| * @param data Turbine information. |
| * @param screen Name of screen to redirect to. |
| * @param template Name of template. |
| * @exception Exception A generic exception. |
| */ |
| public void doRedirect(RunData data, String screen, String template) |
| throws Exception |
| { |
| log.debug("doRedirect(data, " + screen + ", " + template + ")"); |
| setTemplate(data, template); |
| ScreenLoader.getInstance().exec(data, screen); |
| } |
| |
| /** |
| * You can call this within a Screen to cause an internal redirect |
| * to happen. It essentially allows you to stop execution in one |
| * Screen and instantly execute another Screen. Don't worry, this |
| * does not do a HTTP redirect and also if you have anything added |
| * in the Context, it will get carried over. |
| * |
| * <p> |
| * |
| * This class is useful if you have a Screen that submits to |
| * another Screen and you want it to do error validation before |
| * executing the other Screen. If there is an error, you can |
| * doRedirect() back to the original Screen. |
| * |
| * @param data Turbine information. |
| * @param screen Name of screen to redirect to. |
| * @param template Name of template. |
| * @exception Exception A generic exception. |
| */ |
| public void doRedirect(PipelineData pipelineData, String screen, String template) |
| throws Exception |
| { |
| RunData data = (RunData) getRunData(pipelineData); |
| log.debug("doRedirect(data, " + screen + ", " + template + ")"); |
| setTemplate(data, template); |
| ScreenLoader.getInstance().exec(pipelineData, screen); |
| } |
| |
| |
| |
| /** |
| * You can call this within a Screen to cause an internal redirect |
| * to happen. It essentially allows you to stop execution in one |
| * Screen and instantly execute another Screen. Don't worry, this |
| * does not do a HTTP redirect and also if you have anything added |
| * in the Context, it will get carried over. |
| * |
| * <p> |
| * |
| * This class is useful if you have a Screen that submits to |
| * another Screen and you want it to do error validation before |
| * executing the other Screen. If there is an error, you can |
| * doRedirect() back to the original Screen. |
| * |
| * @deprecated Use PipelineData version instead. |
| * @param data Turbine information. |
| * @param template Name of template. |
| * @exception Exception A generic exception. |
| */ |
| public void doRedirect(RunData data, String template) |
| throws Exception |
| { |
| doRedirect(data, TurbineTemplate.getScreenName(template), template); |
| } |
| |
| /** |
| * You can call this within a Screen to cause an internal redirect |
| * to happen. It essentially allows you to stop execution in one |
| * Screen and instantly execute another Screen. Don't worry, this |
| * does not do a HTTP redirect and also if you have anything added |
| * in the Context, it will get carried over. |
| * |
| * <p> |
| * |
| * This class is useful if you have a Screen that submits to |
| * another Screen and you want it to do error validation before |
| * executing the other Screen. If there is an error, you can |
| * doRedirect() back to the original Screen. |
| * |
| * @param data Turbine information. |
| * @param template Name of template. |
| * @exception Exception A generic exception. |
| */ |
| public void doRedirect(PipelineData pipelineData, String template) |
| throws Exception |
| { |
| doRedirect(pipelineData, template); |
| } |
| |
| |
| } |