package com.atlassian.plugin.osgi.factory;
   
   import com.atlassian.plugin.ModuleDescriptor;
   import com.atlassian.plugin.ModuleDescriptorFactory;
   import com.atlassian.plugin.PluginParseException;
   import com.atlassian.plugin.descriptors.UnrecognisedModuleDescriptor;
   import org.slf4j.Logger;
   import org.slf4j.LoggerFactory;
   
  
  /**
   * Module descriptor factory for deferred modules. Turns every request for a module descriptor into a deferred
   * module so be sure that this factory is last in a list of factories.
   *
   * @see UnrecognisedModuleDescriptor
   * @since 2.1.2
   */
  class UnrecognisedModuleDescriptorFallbackFactory implements ModuleDescriptorFactory {
      private static final Logger log = LoggerFactory.getLogger(UnrecognisedModuleDescriptorFallbackFactory.class);
      public static final String DESCRIPTOR_TEXT = "Support for this module is not currently installed.";
  
      public UnrecognisedModuleDescriptor getModuleDescriptor(final String type) throws PluginParseException {
          log.info("Unknown module descriptor of type " + type + " registered as an unrecognised descriptor.");
          final UnrecognisedModuleDescriptor descriptor = new UnrecognisedModuleDescriptor();
          descriptor.setErrorText(DESCRIPTOR_TEXT);
          return descriptor;
      }
  
      public boolean hasModuleDescriptor(final String type) {
          return true;
      }
  
      public Class<? extends ModuleDescriptor<?>> getModuleDescriptorClass(final String type) {
          return UnrecognisedModuleDescriptor.class;
      }
  }