1 files changed, 46 insertions, 0 deletions
diff --git a/src/tools/xcode-common/java/com/google/devtools/build/xcode/common/PathTransformer.java b/src/tools/xcode-common/java/com/google/devtools/build/xcode/common/PathTransformer.java
new file mode 100644
index 0000000000..08b3f6d024
--- /dev/null
+++ b/src/tools/xcode-common/java/com/google/devtools/build/xcode/common/PathTransformer.java
@@ -0,0 +1,46 @@
+// 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.xcode.common;
+
+import java.nio.file.Path;
+
+/** Defines operations common to file paths. */
+public interface PathTransformer<P> {
+  /** Returns the containing directory of the given path. */
+  P parent(P path);
+
+  /** Returns the result of joining a path component string to the given path. */
+  P join(P path, String segment);
+
+  /** Returns the name of the file at the given path, i.e. the last path component. */
+  String name(P path);
+
+  static final PathTransformer<Path> FOR_JAVA_PATH = new PathTransformer<Path>() {
+    @Override
+    public Path parent(Path path) {
+      return path.getParent();
+    }
+
+    @Override
+    public Path join(Path path, String segment) {
+      return path.resolve(segment);
+    }
+
+    @Override
+    public String name(Path path) {
+      return path.getFileName().toString();
+    }
+  };
+}