Initial implementation of "Rename Local Variable" refactoring.

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/refactoring/UserInterfaceManager.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/refactoring/UserInterfaceManager.java
diff --git a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/refactoring/UserInterfaceManager.java b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/refactoring/UserInterfaceManager.java
new file mode 100644
index 0000000000000000000000000000000000000000..8fbae400b6db4eb4fff655b4df2c63782c4c20b2
--- /dev/null
+++ b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/refactoring/UserInterfaceManager.java
@@ -0,0 +1,59 @@
+package com.google.dart.tools.ui.internal.refactoring;
+
+import org.eclipse.ltk.core.refactoring.Refactoring;
+import org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor;
+import org.eclipse.ltk.ui.refactoring.RefactoringWizard;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.util.HashMap;
+import java.util.Map;
+
+public class UserInterfaceManager {
+
+  private static class Tuple {
+    private Class<? extends UserInterfaceStarter> starter;
+    private Class<? extends RefactoringWizard> wizard;
+
+    public Tuple(Class<? extends UserInterfaceStarter> s, Class<? extends RefactoringWizard> w) {
+      starter = s;
+      wizard = w;
+    }
+  }
+
+  private Map<Class<? extends RefactoringProcessor>, Tuple> fMap = new HashMap<Class<? extends RefactoringProcessor>, Tuple>();
+
+  public UserInterfaceStarter getStarter(Refactoring refactoring) {
+    RefactoringProcessor processor = (RefactoringProcessor) refactoring.getAdapter(RefactoringProcessor.class);
+    if (processor == null) {
+      return null;
+    }
+    Tuple tuple = fMap.get(processor.getClass());
+    if (tuple == null) {
+      return null;
+    }
+    try {
+      UserInterfaceStarter starter = tuple.starter.newInstance();
+      Class<? extends RefactoringWizard> wizardClass = tuple.wizard;
+      Constructor<? extends RefactoringWizard> constructor = wizardClass.getConstructor(new Class[] {Refactoring.class});
+      RefactoringWizard wizard = constructor.newInstance(new Object[] {refactoring});
+      starter.initialize(wizard);
+      return starter;
+    } catch (NoSuchMethodException e) {
+      return null;
+    } catch (IllegalAccessException e) {
+      return null;
+    } catch (InstantiationException e) {
+      return null;
+    } catch (IllegalArgumentException e) {
+      return null;
+    } catch (InvocationTargetException e) {
+      return null;
+    }
+  }
+
+  protected void put(Class<? extends RefactoringProcessor> processor,
+      Class<? extends UserInterfaceStarter> starter, Class<? extends RefactoringWizard> wizard) {
+    fMap.put(processor, new Tuple(starter, wizard));
+  }
+}