1 files changed, 26 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/packages/ToolchainConstructor.java b/src/main/java/com/google/devtools/build/lib/packages/ToolchainConstructor.java
new file mode 100644
index 0000000000..fe21f43ed0
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/packages/ToolchainConstructor.java
@@ -0,0 +1,26 @@
+// Copyright 2017 The Bazel Authors. All rights reserved.
+//
+// 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.
+package com.google.devtools.build.lib.packages;
+
+import com.google.devtools.build.lib.packages.ClassObjectConstructor.Key;
+
+/**
+ * Constructor that can be used to generate toolchains. The key returned by {@link #getKey()} is a
+ * serializable representation of the constructor and serves to identify toolchains of the same
+ * type.
+ */
+public interface ToolchainConstructor {
+
+  Key getKey();
+}