1 files changed, 54 insertions, 0 deletions
diff --git a/Firestore/core/src/firebase/firestore/model/document_key.cc b/Firestore/core/src/firebase/firestore/model/document_key.cc
new file mode 100644
index 0000000..ddda4c9
--- /dev/null
+++ b/Firestore/core/src/firebase/firestore/model/document_key.cc
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2018 Google
+ *
+ * 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.
+ */
+
+#include "Firestore/core/src/firebase/firestore/model/document_key.h"
+
+#include <utility>
+
+#include "Firestore/core/src/firebase/firestore/util/firebase_assert.h"
+
+namespace firebase {
+namespace firestore {
+namespace model {
+
+namespace {
+
+void AssertValidPath(const ResourcePath& path) {
+  FIREBASE_ASSERT_MESSAGE(DocumentKey::IsDocumentKey(path),
+                          "invalid document key path: %s",
+                          path.CanonicalString().c_str());
+}
+
+}  // namespace
+
+DocumentKey::DocumentKey(const ResourcePath& path)
+    : path_{std::make_shared<ResourcePath>(path)} {
+  AssertValidPath(*path_);
+}
+
+DocumentKey::DocumentKey(ResourcePath&& path)
+    : path_{std::make_shared<ResourcePath>(std::move(path))} {
+  AssertValidPath(*path_);
+}
+
+const DocumentKey& DocumentKey::Empty() {
+  static const DocumentKey empty;
+  return empty;
+}
+
+}  // namespace model
+}  // namespace firestore
+}  // namespace firebase