Merge "Throw error when notification is larger than max attribute value" into main

framework/java/android/bluetooth/BluetoothGattServer.java

@@ -68,6 +68,8 @@ public final class BluetoothGattServer implements BluetoothProfile {
     private List<BluetoothGattService> mServices;
 
     private static final int CALLBACK_REG_TIMEOUT = 10000;
+    // Max length of an attribute value, defined in gatt_api.h
+    private static final int GATT_MAX_ATTR_LEN = 512;
 
     /**
      * Bluetooth GATT interface callbacks
@@ -829,6 +831,10 @@ public final class BluetoothGattServer implements BluetoothProfile {
         if (device == null) {
             throw new IllegalArgumentException("device must not be null");
         }
+        if (value.length > GATT_MAX_ATTR_LEN) {
+            throw new IllegalArgumentException(
+                    "notification should not be longer than max length of an attribute value");
+        }
         BluetoothGattService service = characteristic.getService();
         if (service == null) {
             throw new IllegalArgumentException("Characteristic must have a non-null service");