/*

  *  Copyright 2007 Tacos.

  * 

  *  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.

  *  under the License.

  */

 package net.sf.tacos.resolvers;

 import org.apache.hivemind.Resource;

 import org.apache.hivemind.impl.DefaultClassResolver;

 import org.apache.hivemind.impl.LocationImpl;

 import org.apache.hivemind.util.ClasspathResource;

 import org.apache.tapestry.INamespace;

 import org.apache.tapestry.IRequestCycle;

 import org.apache.tapestry.resolver.ISpecificationResolverDelegate;

 import org.apache.tapestry.services.ClassFinder;

 import org.apache.tapestry.spec.IComponentSpecification;

 import org.apache.tapestry.spec.ComponentSpecification;

 /**

  * Loads tapestry templates from the classpath - near their corresponding java file.

  * 

  * @author Andreas Andreou, amplafi.com

  */

 public class ClasspathSpecResolverDelegate implements ISpecificationResolverDelegate {

     private ClassFinder classFinder;

     public IComponentSpecification findComponentSpecification(

             IRequestCycle cycle, INamespace namespace, String name) {

         return null;

     }

     public IComponentSpecification findPageSpecification(IRequestCycle cycle,

             INamespace namespace, String name) {

         if (namespace.isApplicationNamespace()) {

             String packages = namespace

                     .getPropertyValue("org.apache.tapestry.page-class-packages");

             String className = name.replace('/', '.');

             Class pageClass = classFinder.findClass(packages, className);

             if (pageClass == null) {

                 return null;

             }

             String fullPath = pageClass.getName().replace('.', '/');

             ClasspathResource html = new ClasspathResource(new DefaultClassResolver(), fullPath + ".html");

             if (html.getResourceURL() != null) {

                 return setupImplicitPage(namespace.getSpecificationLocation(),

                         new ClasspathResource(new DefaultClassResolver(), fullPath + ".page"));

             }

         }

         return null;

     }

     private IComponentSpecification setupImplicitPage(Resource resource, Resource pageResource) {

         IComponentSpecification specification = new ComponentSpecification();

         specification.setPageSpecification(true);

         specification.setSpecificationLocation(pageResource);

         specification.setLocation(new LocationImpl(resource));

         return specification;

     }

     public void setClassFinder(ClassFinder classFinder) {

         this.classFinder = classFinder;

     }

 }