/*

  * Created on Jan 30, 2005

  *

  * Copyright 2004 Chris Nelson

  * 

  * 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.trails.component;

 import java.util.Locale;

 import org.apache.tapestry.IComponent;

 import org.apache.tapestry.IEngine;

 import org.apache.tapestry.IPage;

 import org.apache.tapestry.annotations.InjectObject;

 import org.apache.tapestry.annotations.Parameter;

 import org.trails.descriptor.DescriptorService;

 import org.trails.descriptor.IClassDescriptor;

 import org.trails.i18n.ResourceBundleMessageSource;

 /**

  * Common functionality for ListAllLink, NewLink, SearchLink

  *

  * @author fus8882

  */

 public abstract class AbstractTypeNavigationLink extends Link

 {

         @InjectObject("spring:descriptorService")

         public abstract DescriptorService getDescriptorService();

         /**

          * @return Class object that this link targets.

          */

         @Parameter(required = true)

         public abstract Class getType();

         public abstract void setType(Class type);

         /**

          * @return the class descriptor for the class that this link targets

          */

         public IClassDescriptor getClassDescriptor()

         {

                 return getDescriptorService().getClassDescriptor(getType());

         }

         protected String generateLinkText(String displayName, String bundleKey, String defaultMessage)

         {

                 Locale locale = null;

                 IComponent container = getContainer();

                 // attempt to find the locale or accept null

                 if (container != null)

                 {

                         IPage page = container.getPage();

                         if (page != null)

                         {

                                 IEngine engine = page.getEngine();

                                 if (engine != null)

                                 {

                                         locale = engine.getLocale();

                                 }

                         }

                 }

                 Object[] params = new Object[]{displayName};

                 ResourceBundleMessageSource messageSource = getResourceBundleMessageSource();

                 return messageSource.getMessageWithDefaultValue(bundleKey, params, locale, defaultMessage);

         }

 }