package com.atlassian.plugin.module;
   
   import com.atlassian.plugin.ModuleDescriptor;
   import com.atlassian.plugin.PluginParseException;
   import com.atlassian.plugin.hostcontainer.HostContainer;
   
   /**
    * The ClassModuleFactory creates a java bean for the given module class by using either the plugins container or the hostcontainer, depending
    * if the plugin implements {@link com.atlassian.plugin.module.ContainerManagedPlugin}.
   * The returned bean class should have all constructor dependencies injected. However it is the containers responsibility to inject the dependencies.
   * <p/>
   * The ClassModuleFactory expects the fully qualified name of the java class.
   *
   * @since 2.5.0
   */
  public class ClassPrefixModuleFactory implements PrefixModuleFactory
  {
      protected final HostContainer hostContainer;
  
      public ClassPrefixModuleFactory(final HostContainer hostContainer)
      {
          this.hostContainer = hostContainer;
      }
  
      public <T> T createModule(String name, ModuleDescriptor<T> moduleDescriptor) throws PluginParseException
      {
          Class<T> cls = getModuleClass(name, moduleDescriptor);
  
          if (moduleDescriptor.getPlugin() instanceof ContainerManagedPlugin)
          {
              ContainerManagedPlugin cmPlugin = (ContainerManagedPlugin) moduleDescriptor.getPlugin();
              return cmPlugin.getContainerAccessor().createBean(cls);
          }
          else if (cls != null)
          {
              return hostContainer.create(cls);
          }
          return null;
      }
  
      Class getModuleClass(final String name, final ModuleDescriptor moduleDescriptor) throws ModuleClassNotFoundException
      {
          try
          {
              return moduleDescriptor.getPlugin().loadClass(name, null);
          }
          catch (ClassNotFoundException e)
          {
              throw new ModuleClassNotFoundException(name, moduleDescriptor.getPluginKey(), moduleDescriptor.getKey(), e, createErrorMsg(name));
          }
      }
  
      private String createErrorMsg(String className)
      {
          StringBuilder builder = new StringBuilder();
          builder.append("Couldn't load the class '").append(className).append("'. ");
          builder.append("This could mean that you misspelled the name of the class (double check) or that ");
          builder.append("you're using a class in your plugin that you haven't provided bundle instructions for. ");
          builder.append("See https://developer.atlassian.com/x/mQAN for more details on how to fix this.");
  
          // TinyURL resolves to --> https://developer.atlassian.com/display/DOCS/BundleException
  
          return builder.toString();
      }
  
      public String getPrefix()
      {
          return "class";
      }
  }