googleapis · schmidt-sebastian · Aug 23, 2019 · Aug 15, 2019 · Aug 21, 2019 · Aug 22, 2019
diff --git a/...nts/google-cloud-firestore/src/main/java/com/google/cloud/firestore/DocumentSnapshot.java b/...nts/google-cloud-firestore/src/main/java/com/google/cloud/firestore/DocumentSnapshot.java
@@ -195,11 +195,6 @@ public boolean exists() {
     return fields != null;
   }
 
-  /** Checks whether this DocumentSnapshot contains any fields. */
-  boolean isEmpty() {
-    return fields == null || fields.isEmpty();
-  }
-
   /**
    * Returns the fields of the document as a Map or null if the document doesn't exist. Field values
    * will be converted to their native Java representation.
@@ -428,6 +423,15 @@ public DocumentReference getReference() {
     return docRef;
   }
 
+  /** Checks whether this DocumentSnapshot contains any fields. */
+  boolean isEmpty() {
+    return fields == null || fields.isEmpty();
+  }
+
+  Map<String, Value> getProtoFields() {
+    return fields;
+  }
+
   Write.Builder toPb() {
     Preconditions.checkState(exists(), "Can't call toDocument() on a document that doesn't exist");
     Write.Builder write = Write.newBuilder();

diff --git a/...oud-clients/google-cloud-firestore/src/main/java/com/google/cloud/firestore/Internal.java b/...oud-clients/google-cloud-firestore/src/main/java/com/google/cloud/firestore/Internal.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2019 Google LLC
+ *
+ * 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.cloud.firestore;
+
+import static com.google.cloud.firestore.UserDataConverter.NO_DELETES;
+
+import com.google.api.core.InternalApi;
+import com.google.cloud.Timestamp;
+import com.google.common.base.Preconditions;
+import com.google.firestore.v1.Document;
+import com.google.firestore.v1.Value;
+import java.util.Map;
+
+@InternalApi
+public class Internal {
+  private FirestoreImpl firestore;
+
+  @InternalApi
+  public Internal(FirestoreImpl firestore) {
+    this.firestore = firestore;
+  }
+
+  @InternalApi
+  public DocumentSnapshot snapshotFromObject(String documentPath, Object pojo) {
+    DocumentReference documentReference = firestore.document(documentPath);
+    Object data = CustomClassMapper.convertToPlainJavaTypes(pojo);
+    Preconditions.checkArgument(
+        data instanceof Map, "Can't create a document from an array or primitive");
+    return DocumentSnapshot.fromObject(
+        firestore, documentReference, (Map<String, Object>) data, NO_DELETES);
+  }
+
+  @InternalApi
+  public DocumentSnapshot snapshotFromMap(String documentPath, Map<String, Object> data) {
+    DocumentReference documentReference = firestore.document(documentPath);
+    return DocumentSnapshot.fromObject(firestore, documentReference, data, NO_DELETES);
+  }
+
+  @InternalApi
+  public DocumentSnapshot snapshotFromProto(Timestamp readTime, Document document) {
+    return DocumentSnapshot.fromDocument(firestore, readTime, document);
+  }
+
+  @InternalApi
+  public Map<String, Value> protoFromSnapshot(DocumentSnapshot snapshot) {
+    return snapshot.getProtoFields();
+  }
+}