refactor: migrate DynamicFromObject to Kotlin (#50754)

Summary:
PR migrates DynamicFromObject class to Kotlin as part of https://github.com/facebook/react-native/issues/50513 work.

## Changelog:

[ANDROID] [CHANGED] - Migrated DynamicFromObject to Kotlin

Pull Request resolved: https://github.com/facebook/react-native/pull/50754

Test Plan: Run RN-Tester application and played around with it a bit.

Reviewed By: mlord93

Differential Revision: D73118014

Pulled By: alanleedev

fbshipit-source-id: 84958ff07ccafea9ec3dbdf06467c638eb92d49d

packages/react-native/ReactAndroid/api/ReactAndroid.api

@@ -704,7 +704,7 @@ public abstract interface class com/facebook/react/bridge/Dynamic {
 	public abstract fun recycle ()V
 }
 
-public class com/facebook/react/bridge/DynamicFromObject : com/facebook/react/bridge/Dynamic {
+public final class com/facebook/react/bridge/DynamicFromObject : com/facebook/react/bridge/Dynamic {
 	public fun <init> (Ljava/lang/Object;)V
 	public fun asArray ()Lcom/facebook/react/bridge/ReadableArray;
 	public fun asBoolean ()Z

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

@@ -1,109 +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.Nullable;
-import com.facebook.common.logging.FLog;
-import com.facebook.infer.annotation.Nullsafe;
-import com.facebook.react.common.ReactConstants;
-
-/** Implementation of Dynamic wrapping a ReadableArray. */
-@Nullsafe(Nullsafe.Mode.LOCAL)
-public class DynamicFromObject implements Dynamic {
-  private @Nullable Object mObject;
-
-  public DynamicFromObject(@Nullable Object obj) {
-    mObject = obj;
-  }
-
-  @Override
-  public void recycle() {
-    // Noop - nothing to recycle since there is no pooling
-  }
-
-  @Override
-  public boolean isNull() {
-    return mObject == null;
-  }
-
-  @Override
-  public boolean asBoolean() {
-    if (mObject == null || !(mObject instanceof Boolean)) {
-      throw new ClassCastException("Dynamic value from Object is not a boolean");
-    }
-    return (boolean) mObject;
-  }
-
-  @Override
-  public double asDouble() {
-    if (mObject == null || !(mObject instanceof Number)) {
-      throw new ClassCastException("Dynamic value from Object is not a number");
-    }
-    return (double) mObject;
-  }
-
-  @Override
-  public int asInt() {
-    if (mObject == null || !(mObject instanceof Number)) {
-      throw new ClassCastException("Dynamic value from Object is not a number");
-    }
-    // Numbers from JS are always Doubles
-    return ((Double) mObject).intValue();
-  }
-
-  @Override
-  public String asString() {
-    if (mObject == null || !(mObject instanceof String)) {
-      throw new ClassCastException("Dynamic value from Object is not a string");
-    }
-    return (String) mObject;
-  }
-
-  @Override
-  public ReadableArray asArray() {
-    if (mObject == null || !(mObject instanceof ReadableArray)) {
-      throw new ClassCastException("Dynamic value from Object is not a ReadableArray");
-    }
-    return (ReadableArray) mObject;
-  }
-
-  @Override
-  public ReadableMap asMap() {
-    if (mObject == null || !(mObject instanceof ReadableMap)) {
-      throw new ClassCastException("Dynamic value from Object is not a ReadableMap");
-    }
-    return (ReadableMap) mObject;
-  }
-
-  @Override
-  public ReadableType getType() {
-    if (isNull()) {
-      return ReadableType.Null;
-    }
-    if (mObject instanceof Boolean) {
-      return ReadableType.Boolean;
-    }
-    if (mObject instanceof Number) {
-      return ReadableType.Number;
-    }
-    if (mObject instanceof String) {
-      return ReadableType.String;
-    }
-    if (mObject instanceof ReadableMap) {
-      return ReadableType.Map;
-    }
-    if (mObject instanceof ReadableArray) {
-      return ReadableType.Array;
-    }
-    FLog.e(
-        ReactConstants.TAG,
-        "Unmapped object type "
-            + (mObject == null ? "<NULL object>" : mObject.getClass().getName()));
-    return ReadableType.Null;
-  }
-}

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

@@ -0,0 +1,80 @@
+/*
+ * 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 com.facebook.common.logging.FLog
+import com.facebook.react.common.ReactConstants
+
+/** Implementation of Dynamic wrapping a ReadableArray. */
+public class DynamicFromObject(private val value: Any?) : Dynamic {
+  override fun recycle() {
+    // Noop - nothing to recycle since there is no pooling
+  }
+
+  override val isNull: Boolean
+    get() = value == null
+
+  override fun asBoolean(): Boolean {
+    if (value is Boolean) {
+      return value
+    }
+    throw ClassCastException("Dynamic value from Object is not a boolean")
+  }
+
+  override fun asDouble(): Double {
+    if (value is Number) {
+      return value as Double
+    }
+    throw ClassCastException("Dynamic value from Object is not a number")
+  }
+
+  override fun asInt(): Int {
+    if (value is Number) {
+      // Numbers from JS are always Doubles
+      return (value as Double).toInt()
+    }
+    throw ClassCastException("Dynamic value from Object is not a number")
+  }
+
+  override fun asString(): String {
+    if (value is String) {
+      return value
+    }
+    throw ClassCastException("Dynamic value from Object is not a string")
+  }
+
+  override fun asArray(): ReadableArray {
+    if (value is ReadableArray) {
+      return value
+    }
+    throw ClassCastException("Dynamic value from Object is not a ReadableArray")
+  }
+
+  override fun asMap(): ReadableMap {
+    if (value is ReadableMap) {
+      return value
+    }
+    throw ClassCastException("Dynamic value from Object is not a ReadableMap")
+  }
+
+  override val type: ReadableType
+    get() {
+      return when (value) {
+        null -> ReadableType.Null
+        is Boolean -> ReadableType.Boolean
+        is Number -> ReadableType.Number
+        is String -> ReadableType.String
+        is ReadableMap -> ReadableType.Map
+        is ReadableArray -> ReadableType.Array
+        else -> {
+          FLog.e(ReactConstants.TAG, "Unmapped object type " + (value.javaClass.name))
+          ReadableType.Null
+        }
+      }
+    }
+}