ART: Add missing Checker file

Change-Id: I97a7ff931644a6a062ba76abb759fd02d1c52530

1 files changed, 25 insertions, 0 deletions

diff --git a/tools/checker/common/immutables.py b/tools/checker/common/immutables.py
new file mode 100644
index 0000000000..e016867c23
--- /dev/null
+++ b/tools/checker/common/immutables.py
@@ -0,0 +1,25 @@
+# Copyright (C) 2015 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+class ImmutableDict(dict):
+  def __setitem__(self, key, value):
+    raise RuntimeError("Cannot modify ImmutableDict")
+
+  def __delitem__(self, key):
+    raise RuntimeError("Cannot modify ImmutableDict")
+
+  def copyWith(self, key, value):
+    newDict = ImmutableDict(self)
+    dict.__setitem__(newDict, key, value)
+    return newDict