1 files changed, 65 insertions, 0 deletions
diff --git a/third_party/java/buck-ios-support/java/com/facebook/buck/apple/xcode/xcodeproj/SourceTreePath.java b/third_party/java/buck-ios-support/java/com/facebook/buck/apple/xcode/xcodeproj/SourceTreePath.java
new file mode 100644
index 0000000000..dc49f76bb8
--- /dev/null
+++ b/third_party/java/buck-ios-support/java/com/facebook/buck/apple/xcode/xcodeproj/SourceTreePath.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2013-present Facebook, Inc.
+ *
+ * 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.facebook.buck.apple.xcode.xcodeproj;
+
+import com.google.common.base.Preconditions;
+
+import java.nio.file.Path;
+import java.util.Objects;
+
+/**
+ * Utility class representing a tuple of (SourceTree, Path) used for uniquely describing a file
+ * reference in a group.
+ */
+public class SourceTreePath {
+  private final PBXReference.SourceTree sourceTree;
+  private final Path path;
+
+  public SourceTreePath(PBXReference.SourceTree sourceTree, Path path) {
+    this.sourceTree = Preconditions.checkNotNull(sourceTree);
+    Preconditions.checkState(
+        path != null && path.toString().length() > 0,
+        "A path to a file cannot be null or empty");
+    path = path.normalize();
+    Preconditions.checkState(path.toString().length() > 0, "A path to a file cannot be empty");
+    this.path = path;
+  }
+
+  public PBXReference.SourceTree getSourceTree() {
+    return sourceTree;
+  }
+
+  public Path getPath() {
+    return path;
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(sourceTree, path);
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    if (other == null || !(other instanceof SourceTreePath)) {
+      return false;
+    }
+
+    SourceTreePath that = (SourceTreePath) other;
+    return Objects.equals(this.sourceTree, that.sourceTree) &&
+        Objects.equals(this.path, that.path);
+  }
+}