+ /**
+ * Answers an instance of this class for the current application (Java or JS
+ * 'applet') scope, and scoped to the specified context
+ *
+ * @param context
+ * @return
+ */
+ public static StructureSelectionManager getStructureSelectionManager(
+ StructureSelectionManagerProvider context)
+ {
+ return getInstance().getInstanceForContext(context);
+ }
+
+ /**
+ * Answers an instance of this class scoped to the given context. The instance
+ * is created on the first request for the context, thereafter the same
+ * instance is returned. Note that the context may be null (this is the case
+ * when running headless without a Desktop).
+ *
+ * @param context
+ * @return
+ */
+ StructureSelectionManager getInstanceForContext(
+ StructureSelectionManagerProvider context)
+ {
+ StructureSelectionManager instance = selectionManagers.get(context);
+ if (instance == null)
+ {
+ instance = new StructureSelectionManager();
+ selectionManagers.put(context, instance);
+ }
+ return instance;
+ }
+/** Null provider in 2.11.2
+
+
+ private static StructureSelectionManager nullProvider = null;
+
+ public static StructureSelectionManager getStructureSelectionManager(
+ StructureSelectionManagerProvider context)
+ {
+ if (context == null)
+ {
+ if (nullProvider == null)
+ {
+ if (instances != null)
+ {
+ throw new Error(MessageManager.getString(
+ "error.implementation_error_structure_selection_manager_null"),
+ new NullPointerException(MessageManager
+ .getString("exception.ssm_context_is_null")));
+ }
+ else
+ {
+ nullProvider = new StructureSelectionManager();
+ }
+ return nullProvider;
+ }
+ }
+ if (instances == null)
+ {
+ instances = new java.util.IdentityHashMap<>();
+ }
+ StructureSelectionManager instance = instances.get(context);
+ if (instance == null)
+ {
+ if (nullProvider != null)
+ {
+ instance = nullProvider;
+ }
+ else
+ {
+ instance = new StructureSelectionManager();
+ }
+ instances.put(context, instance);
+ }
+ return instance;
+ }
+*/