diff --git a/src/main/java/com/google/devtools/build/lib/rules/proto/SupportData.java b/src/main/java/com/google/devtools/build/lib/rules/proto/SupportData.java
new file mode 100644
index 0000000..4d29a26
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/rules/proto/SupportData.java
@@ -0,0 +1,55 @@
+// Copyright 2015 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.rules.proto;
+
+import com.google.auto.value.AutoValue;
+import com.google.common.base.Predicate;
+import com.google.common.collect.ImmutableList;
+import com.google.devtools.build.lib.actions.Artifact;
+import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
+import com.google.devtools.build.lib.collect.nestedset.NestedSet;
+import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
+
+import javax.annotation.Nullable;
+
+/**
+ * A helper class for the *Support classes containing some data from ProtoLibrary.
+ */
+@AutoValue
+@Immutable
+public abstract class SupportData {
+  public static SupportData create(
+      Predicate<TransitiveInfoCollection> nonWeakDepsPredicate,
+      ImmutableList<Artifact> protoSources,
+      NestedSet<Artifact> transitiveImports,
+      Artifact usedDirectDeps,
+      boolean hasProtoSources) {
+    return new AutoValue_SupportData(
+        nonWeakDepsPredicate, protoSources, transitiveImports, usedDirectDeps, hasProtoSources);
+  }
+
+  public abstract Predicate<TransitiveInfoCollection> getNonWeakDepsPredicate();
+
+  public abstract ImmutableList<Artifact> getDirectProtoSources();
+
+  public abstract NestedSet<Artifact> getTransitiveImports();
+
+  @Nullable
+  public abstract Artifact getUsedDirectDeps();
+
+  public abstract boolean hasProtoSources();
+
+  SupportData() {}
+}