Kotlinify ReadableMap (#43904)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/43904

Changelog: [Internal]

As part of the Sustainability Week (see [post](https://fb.workplace.com/groups/251759413609061/permalink/742797531171911/)).

Reviewed By: cortinico

Differential Revision: D55793535

fbshipit-source-id: 13ddcd97da4a6a2ccc61b13291f64e7f6c9ed459

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/ReadableMap.java

@@ -1,57 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-package com.facebook.react.bridge;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.Map;
-
-/**
- * Interface for a map that allows typed access to its members. Used to pass parameters from JS to
- * Java.
- */
-public interface ReadableMap {
-
-  boolean hasKey(@NonNull String name);
-
-  boolean isNull(@NonNull String name);
-
-  boolean getBoolean(@NonNull String name);
-
-  double getDouble(@NonNull String name);
-
-  int getInt(@NonNull String name);
-
-  long getLong(@NonNull String name);
-
-  @Nullable
-  String getString(@NonNull String name);
-
-  @Nullable
-  ReadableArray getArray(@NonNull String name);
-
-  @Nullable
-  ReadableMap getMap(@NonNull String name);
-
-  @NonNull
-  Dynamic getDynamic(@NonNull String name);
-
-  @NonNull
-  ReadableType getType(@NonNull String name);
-
-  @NonNull
-  Iterator<Map.Entry<String, Object>> getEntryIterator();
-
-  @NonNull
-  ReadableMapKeySetIterator keySetIterator();
-
-  @NonNull
-  HashMap<String, Object> toHashMap();
-}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/ReadableMap.kt

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.bridge
+
+import java.util.HashMap
+import kotlin.collections.Iterator
+import kotlin.collections.Map
+
+/**
+ * Interface for a map that allows typed access to its members. Used to pass parameters from JS to
+ * Kotlin.
+ */
+public interface ReadableMap {
+  public fun getArray(name: String): ReadableArray?
+
+  public fun getBoolean(name: String): Boolean
+
+  public fun getDouble(name: String): Double
+
+  public fun getDynamic(name: String): Dynamic
+
+  public fun getEntryIterator(): Iterator<Map.Entry<String, Any>>
+
+  public fun getInt(name: String): Int
+
+  public fun getLong(name: String): Long
+
+  public fun getMap(name: String): ReadableMap?
+
+  public fun getString(name: String): String?
+
+  public fun getType(name: String): ReadableType
+
+  public fun hasKey(name: String): Boolean
+
+  public fun isNull(name: String): Boolean
+
+  public fun keySetIterator(): ReadableMapKeySetIterator
+
+  public fun toHashMap(): HashMap<String, Any>
+}