Initial implementation of "Rename Local Variable" refactoring.

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/internal/corext/refactoring/tagging/IDelegateUpdating.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/internal/corext/refactoring/tagging/IDelegateUpdating.java
diff --git a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/internal/corext/refactoring/tagging/IDelegateUpdating.java b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/internal/corext/refactoring/tagging/IDelegateUpdating.java
new file mode 100644
index 0000000000000000000000000000000000000000..b3262f5f027577000be395bf2c39474c360ad7c7
--- /dev/null
+++ b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/internal/corext/refactoring/tagging/IDelegateUpdating.java
@@ -0,0 +1,51 @@
+package com.google.dart.tools.internal.corext.refactoring.tagging;
+
+/**
+ * Interface for refactorings which are able to create appropriate delegates for the refactored
+ * elements.
+ */
+public interface IDelegateUpdating {
+
+  /**
+   * Performs a dynamic check whether this refactoring object is capable of creating appropriate
+   * delegates for the refactored elements. The return value of this method may change according to
+   * the state of the refactoring.
+   */
+  public boolean canEnableDelegateUpdating();
+
+  /**
+   * If <code>canEnableDelegateUpdating</code> returns <code>true</code>, then this method is used
+   * to ask the refactoring object whether delegates will be created. This call can be ignored if
+   * <code>canEnableDelegateUpdating</code> returns <code>false</code>.
+   */
+  public boolean getDelegateUpdating();
+
+  /**
+   * Returns the title of the preference to update delegates in the user interface.
+   * 
+   * @param plural <code>true</code> if several delegates are created, <code>false</code> otherwise
+   * @return the non-null string denoting the title
+   */
+  public String getDelegateUpdatingTitle(boolean plural);
+
+  /**
+   * If <code>canEnableDelegateUpdating</code> returns <code>true</code>, then this method is used
+   * to ask the refactoring object whether delegates will be deprecated. This call can be ignored if
+   * <code>canEnableDelegateUpdating</code> returns <code>false</code>.
+   */
+  public boolean getDeprecateDelegates();
+
+  /**
+   * If <code>canEnableDelegateUpdating</code> returns <code>true</code>, then this method may be
+   * called to set whether to create delegates. This call can be ignored if
+   * <code>canEnableDelegateUpdating</code> returns <code>false</code>.
+   */
+  public void setDelegateUpdating(boolean updating);
+
+  /**
+   * If <code>canEnableDelegateUpdating</code> returns <code>true</code>, then this method may be
+   * called to set whether to deprecate delegates. This call can be ignored if
+   * <code>canEnableDelegateUpdating</code> returns <code>false</code>.
+   */
+  public void setDeprecateDelegates(boolean deprecate);
+}