invoke custom hooks to retrieve metadata display instead of hard-coding it

plugins/FedoraObjectDetailedContent.inc

@@ -49,7 +49,28 @@ class FedoraObjectDetailedContent {
       '#type' => 'tabset',
     );
 
-    $dc_html = $objectHelper->getFormattedDC($this->item);
+    // ***** Jason: begin object details display profiles
+    module_load_include('inc', 'fedora_repository', 'ObjectDetails');
+    $object_details_profile = variable_get('islandora_object_details_display_table', 'xslt_dc');
+    $profiles = module_invoke_all("islandora_object_details_display");
+    $profile = $profiles[$object_details_profile];
+    if (!isset($profile)) {
+      // default behaviour
+      drupal_set_message(t("There was an error reading the default object details display profile"), "error");
+      $dc_html = $objectHelper->getFormattedDC($this->item);
+    }
+    else {
+      // invoke the requested display profile
+      require_once(drupal_get_path('module', $profile['module']) ."/". $profile['file']);
+      $details_function = $profile['function'];
+      if (function_exists($details_function)) {
+        $dc_html = $details_function($this->item);
+      }
+      else {
+        // problem
+      }
+    }
+    // ***** Jason: end object details display profiles
 
     $i = 0;
     if (fedora_repository_access(OBJECTHELPER :: $VIEW_DETAILED_CONTENT_LIST, $this->pid, $user)) {