Case Study: adding data and statistics

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

diff --git a/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/javaeditor/ClassFileEditorInputFactory.java b/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/javaeditor/ClassFileEditorInputFactory.java
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+/*******************************************************************************
+ * Copyright (c) 2000, 2009 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.javaeditor;
+
+
+import org.eclipse.core.runtime.IAdaptable;
+
+import org.eclipse.ui.IElementFactory;
+import org.eclipse.ui.IMemento;
+
+import org.eclipse.jdt.core.IClassFile;
+import org.eclipse.jdt.core.IJavaElement;
+import org.eclipse.jdt.core.IJavaProject;
+import org.eclipse.jdt.core.IType;
+import org.eclipse.jdt.core.JavaCore;
+import org.eclipse.jdt.core.JavaModelException;
+
+/**
+ * The factory which is capable of recreating class file editor
+ * inputs stored in a memento.
+ */
+public class ClassFileEditorInputFactory implements IElementFactory {
+
+       public final static String ID=  "org.eclipse.jdt.ui.ClassFileEditorInputFactory"; //$NON-NLS-1$
+       public final static String KEY= "org.eclipse.jdt.ui.ClassFileIdentifier"; //$NON-NLS-1$
+
+       public ClassFileEditorInputFactory() {
+       }
+
+       /*
+        * @see org.eclipse.ui.IElementFactory#createElement(org.eclipse.ui.IMemento)
+        */
+       public IAdaptable createElement(IMemento memento) {
+               String identifier= memento.getString(KEY);
+               if (identifier == null)
+                       return null;
+
+               IJavaElement element= JavaCore.create(identifier);
+               try {
+                       if (!element.exists() && element instanceof IClassFile) {
+                               /*
+                                * Let's try to find the class file,
+                                * see https://bugs.eclipse.org/bugs/show_bug.cgi?id=83221
+                                */
+                               IClassFile cf= (IClassFile)element;
+                               IType type= cf.getType();
+                               IJavaProject project= element.getJavaProject();
+                               if (project != null) {
+                                       type= project.findType(type.getFullyQualifiedName());
+                                       if (type == null)
+                                               return null;
+                                       element= type.getParent();
+                               }
+                       }
+                       return EditorUtility.getEditorInput(element);
+               } catch (JavaModelException x) {
+                       // Don't report but simply return null
+                       return null;
+               }
+       }
+
+       public static void saveState(IMemento memento, InternalClassFileEditorInput input) {
+               IClassFile c= input.getClassFile();
+               memento.putString(KEY, c.getHandleIdentifier());
+       }
+}