View Javadoc

    1   package org.apache.turbine.modules.layouts;
    2
    3   /*
    4    * Licensed to the Apache Software Foundation (ASF) under one
    5    * or more contributor license agreements.  See the NOTICE file
    6    * distributed with this work for additional information
    7    * regarding copyright ownership.  The ASF licenses this file
    8    * to you under the Apache License, Version 2.0 (the
    9    * "License"); you may not use this file except in compliance
    10   * with the License.  You may obtain a copy of the License at
    11   *
    12   *   http://www.apache.org/licenses/LICENSE-2.0
    13   *
    14   * Unless required by applicable law or agreed to in writing,
    15   * software distributed under the License is distributed on an
    16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    17   * KIND, either express or implied.  See the License for the
    18   * specific language governing permissions and limitations
    19   * under the License.
    20   */
    21
    22  import org.apache.commons.logging.Log;
    23  import org.apache.commons.logging.LogFactory;
    24  import org.apache.turbine.TurbineConstants;
    25  import org.apache.turbine.annotation.TurbineService;
    26  import org.apache.turbine.modules.Layout;
    27  import org.apache.turbine.pipeline.PipelineData;
    28  import org.apache.turbine.services.velocity.VelocityService;
    29  import org.apache.turbine.util.RunData;
    30  import org.apache.turbine.util.template.TemplateNavigation;
    31  import org.apache.turbine.util.template.TemplateScreen;
    32  import org.apache.velocity.context.Context;
    33
    34  /**
    35   * This Layout module is Turbine 2.3.3 VelocityDirectLayout (same package)
    36   * with methods added for {@link PipelineData}. It is used in Jetspeed-1 portal.
    37   *
    38   * @author <a href="mailto:raphael@apache.org">Raphaël Luta</a>
    39   * @author <a href="mailto:john.mcnally@clearink.com">John D. McNally</a>
    40   * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
    41   * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
    42   * @version $Id$
    43   */
    44  public class VelocityCachedLayout
    45      extends Layout
    46  {
    47      /** Logging */
    48      private static Log log = LogFactory.getLog(VelocityCachedLayout.class);
    49
    50      /** The prefix for lookup up layout pages */
    51      private String prefix = getPrefix() + "/";
    52
    53      /** Injected service instance */
    54      @TurbineService
    55      private VelocityService velocityService;
    56
    57      /**
    58       * Method called by LayoutLoader.
    59       *
    60       *
    61       * @param pipelineData PipelineData
    62       * @throws Exception generic exception
    63       */
    64      @Override
    65      public void doBuild(PipelineData pipelineData)
    66          throws Exception
    67      {
    68          RunData data = getRunData(pipelineData);
    69          // Get the context needed by Velocity.
    70          Context context = velocityService.getContext(pipelineData);
    71
    72          // variable for the screen in the layout template
    73          context.put(TurbineConstants.SCREEN_PLACEHOLDER,
    74                      new TemplateScreen(data));
    75
    76          // variable to reference the navigation screen in the layout template
    77          context.put(TurbineConstants.NAVIGATION_PLACEHOLDER,
    78                      new TemplateNavigation(data));
    79
    80          // Grab the layout template set in the VelocityPage.
    81          // If null, then use the default layout template
    82          // (done by the TemplateInfo object)
    83          String templateName = data.getTemplateInfo().getLayoutTemplate();
    84
    85          // Set the locale and content type
    86          data.getResponse().setLocale(data.getLocale());
    87          data.getResponse().setContentType(data.getContentType());
    88
    89          log.debug("Now trying to render layout " + templateName);
    90
    91          // Finally, generate the layout template and send it to the browser
    92          velocityService.handleRequest(context,
    93                  prefix + templateName, data.getOut());
    94      }
    95  }
    96