I am trying to read data from preference datastore and getting this unexpected error.

Here's a codelab from google link1

Here's the official doc link2

private const val DATA_STORE_NAME = "SETTINGS_STATE_OF_APP"
val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = DATA_STORE_NAME)
class PreferencesDatastore(private val context: Context) {

val readData: Flow<Model> = context.dataStore.data
    .catch { exception ->
        if (exception in IOException){    // here the IOException is throwing error 
            emit(emptyPreferences())
        }else {
            throw exception
        }
    }
    .map {
       
    }
}

This same code is working fine in an older project.

Can anyone tell me how to solve this?

CodePudding user response：

The problem was in using in keyword for testing if an object is of a given type instead of is. To prevent these kind of problems in future I recommed you to check Type checks and casts in Kotlin and Java instanceOf Operator