Case Study: adding data and statistics

[ifi-stolz-refaktor.git] / case-study / jdt-before / ui / org / eclipse / jdt / internal / ui / workingsets / Mementos.java

diff --git a/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/workingsets/Mementos.java b/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/workingsets/Mementos.java
new file mode 100644 (file)
index 0000000..cb301c2
--- /dev/null
+++ b/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/workingsets/Mementos.java
@@ -0,0 +1,49 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2008 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.internal.ui.workingsets;
+
+import org.eclipse.core.runtime.IAdaptable;
+
+import org.eclipse.ui.IElementFactory;
+import org.eclipse.ui.IMemento;
+import org.eclipse.ui.IPersistableElement;
+import org.eclipse.ui.PlatformUI;
+
+public class Mementos {
+
+    public static final String TAG_FACTORY_ID = "factoryID"; //$NON-NLS-1$
+    public static final String TAG_ITEM = "item"; //$NON-NLS-1$
+
+    public static void saveItem(IMemento memento, IAdaptable element) {
+        IPersistableElement persistable= (IPersistableElement)element.getAdapter(IPersistableElement.class);
+        if (persistable != null) {
+            memento.putString(
+               TAG_FACTORY_ID,
+                persistable.getFactoryId());
+            persistable.saveState(memento);
+        }
+
+    }
+
+       public static IAdaptable restoreItem(IMemento memento) {
+               return restoreItem(memento, TAG_FACTORY_ID);
+       }
+
+       public static IAdaptable restoreItem(IMemento memento, String factoryTag) {
+               if (memento == null)
+                       return null;
+           String factoryID = memento.getString(factoryTag);
+           if (factoryID == null) return null;
+           IElementFactory factory = PlatformUI.getWorkbench().getElementFactory(factoryID);
+           if (factory == null) return null;
+           return factory.createElement(memento);
+       }
+}