refactor: migrate DynamicFromObject to Kotlin

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

@@ -0,0 +1,85 @@
+/*
+ * 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.react.common.ReactConstants
+
+/** Implementation of Dynamic wrapping a ReadableArray. */
+class DynamicFromObject(@Nullable private var mObject: Any?) : Dynamic {
+
+  override fun recycle() {
+    // Noop - nothing to recycle since there is no pooling
+  }
+
+  override fun isNull(): Boolean {
+    return mObject == null
+  }
+
+  override fun asBoolean(): Boolean {
+    if (mObject !is Boolean) {
+      throw ClassCastException("Dynamic value from Object is not a boolean")
+    }
+    return mObject as Boolean
+  }
+
+  override fun asDouble(): Double {
+    if (mObject !is Number) {
+      throw ClassCastException("Dynamic value from Object is not a number")
+    }
+    return (mObject as Number).toDouble()
+  }
+
+  override fun asInt(): Int {
+    if (mObject !is Number) {
+      throw ClassCastException("Dynamic value from Object is not a number")
+    }
+    // Numbers from JS are always Doubles
+    return (mObject as Double).toInt()
+  }
+
+  override fun asString(): String {
+    if (mObject !is String) {
+      throw ClassCastException("Dynamic value from Object is not a string")
+    }
+    return mObject as String
+  }
+
+  override fun asArray(): ReadableArray {
+    if (mObject !is ReadableArray) {
+      throw ClassCastException("Dynamic value from Object is not a ReadableArray")
+    }
+    return mObject as ReadableArray
+  }
+
+  override fun asMap(): ReadableMap {
+    if (mObject !is ReadableMap) {
+      throw ClassCastException("Dynamic value from Object is not a ReadableMap")
+    }
+    return mObject as ReadableMap
+  }
+
+  override fun getType(): ReadableType {
+    return when {
+      isNull() -> ReadableType.Null
+      mObject is Boolean -> ReadableType.Boolean
+      mObject is Number -> ReadableType.Number
+      mObject is String -> ReadableType.String
+      mObject is ReadableMap -> ReadableType.Map
+      mObject is ReadableArray -> ReadableType.Array
+      else -> {
+        FLog.e(
+          ReactConstants.TAG,
+          "Unmapped object type " + (mObject?.javaClass?.name ?: "<NULL object>")
+        )
+        ReadableType.Null
+      }
+    }
+  }
+}