1 files changed, 52 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/rules/java/JavaRunfilesProvider.java b/src/main/java/com/google/devtools/build/lib/rules/java/JavaRunfilesProvider.java
new file mode 100644
index 0000000000..b742d6224b
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/rules/java/JavaRunfilesProvider.java
@@ -0,0 +1,52 @@
+// Copyright 2014 Google Inc. 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.java;
+
+import com.google.common.base.Function;
+import com.google.devtools.build.lib.analysis.Runfiles;
+import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
+import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
+import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
+
+/**
+ * A {@link TransitiveInfoProvider} that supplies runfiles for Java dependencies.
+ */
+@Immutable
+public final class JavaRunfilesProvider implements TransitiveInfoProvider {
+  private final Runfiles runfiles;
+
+  public JavaRunfilesProvider(Runfiles runfiles) {
+    this.runfiles = runfiles;
+  }
+
+  public Runfiles getRunfiles() {
+    return runfiles;
+  }
+
+  /**
+   * Returns a function that gets the Java runfiles from a {@link TransitiveInfoCollection} or
+   * the empty runfiles instance if it does not contain that provider.
+   */
+  public static final Function<TransitiveInfoCollection, Runfiles> TO_RUNFILES =
+      new Function<TransitiveInfoCollection, Runfiles>() {
+        @Override
+        public Runfiles apply(TransitiveInfoCollection input) {
+          JavaRunfilesProvider provider = input.getProvider(JavaRunfilesProvider.class);
+          return provider == null
+              ? Runfiles.EMPTY
+              : provider.getRunfiles();
+        }
+      };
+}