package com.atlassian.plugin.impl;
   
   import com.atlassian.plugin.ModuleDescriptor;
   import com.atlassian.plugin.Plugin;
   import com.atlassian.plugin.descriptors.UnloadableModuleDescriptor;
   
   import java.util.ArrayList;
   import java.util.List;
   
  /**
   * Utility class to create UnloadablePlugin instances.
   */
  public final class UnloadablePluginFactory {
      /**
       * Creates an UnloadablePlugin instance from a given plugin, when there were problems loading the modules or the plugin itself
       *
       * @param oldPlugin the Plugin that is unloadable
       * @return UnloadablePlugin instance
       */
      public static UnloadablePlugin createUnloadablePlugin(final Plugin oldPlugin) {
          return createUnloadablePlugin(oldPlugin, null);
      }
  
      /**
       * Creates an UnloadablePlugin instance from a given plugin.
       *
       * It also allows a problematic ModuleDescriptor to be passed in, which will replace the existing
       * descriptor with the same key in the new plugin.
       *
       * @param oldPlugin            the Plugin that is unloadable
       * @param unloadableDescriptor the ModuleDescriptor containing the error
       * @return UnloadablePlugin instance
       */
      public static UnloadablePlugin createUnloadablePlugin(final Plugin oldPlugin, final UnloadableModuleDescriptor unloadableDescriptor) {
          final UnloadablePlugin newPlugin = new UnloadablePlugin();
  
          newPlugin.setName(oldPlugin.getName());
          newPlugin.setKey(oldPlugin.getKey());
          newPlugin.setI18nNameKey(oldPlugin.getI18nNameKey());
          newPlugin.setUninstallable(oldPlugin.isUninstallable());
          newPlugin.setDeletable(oldPlugin.isDeleteable());
          newPlugin.setPluginsVersion(oldPlugin.getPluginsVersion());
          newPlugin.setDynamicallyLoaded(oldPlugin.isDynamicallyLoaded());
  
          // Make sure it's visible to the user
          newPlugin.setSystemPlugin(false);
  
          newPlugin.setPluginInformation(oldPlugin.getPluginInformation());
  
          final List<ModuleDescriptor<?>> moduleDescriptors = new ArrayList<ModuleDescriptor<?>>(oldPlugin.getModuleDescriptors());
  
          for (final ModuleDescriptor<?> descriptor : moduleDescriptors) {
              // If we find the module descriptor that is causing the problem, skip it
              if ((unloadableDescriptor != null) && descriptor.getKey().equals(unloadableDescriptor.getKey())) {
                  continue;
              }
              newPlugin.addModuleDescriptor(descriptor);
          }
  
          // Add the unloadable descriptor to the end (if it exists)
          if (unloadableDescriptor != null) {
              newPlugin.addModuleDescriptor(unloadableDescriptor);
          }
  
          return newPlugin;
      }
  }