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class C { // C is not serializable
def foo = (x: Int) => (y: Int) => x + y
def bar = (x: Int) => (y: Int) => {toString; x + y}
}
object Test {
def main(args: Array[String]): Unit = {
val c = new C
val f = c.foo
assert(f(1)(2) == 3)
val f1 = serializeDeserialize(f)
assert(f1(1)(2) == 3)
try {
serializeDeserialize(c.bar)
assert(false)
} catch {
case _: java.io.NotSerializableException =>
// expected, lambda transitively refers to this
}
}
def serializeDeserialize[T <: AnyRef](obj: T): T = {
import java.io._
val buffer = new ByteArrayOutputStream
val out = new ObjectOutputStream(buffer)
out.writeObject(obj)
val in = new ObjectInputStream(new ByteArrayInputStream(buffer.toByteArray))
in.readObject.asInstanceOf[T]
}
}
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