rspec/rules/S2060/java/rule.adoc

== Why is this an issue?

An ``++Externalizable++`` class is one which handles its own ``++Serialization++`` and deserialization. During deserialization, the first step in the process is a default instantiation using the class' no-argument constructor. Therefore an ``++Externalizable++`` class without a no-arg constructor cannot be deserialized.


=== Noncompliant code example

[source,java]
----
public class Tomato implements Externalizable {  // Noncompliant; no no-arg constructor

  public Tomato (String color, int weight) { ... }
}
----


=== Compliant solution

[source,java]
----
public class Tomato implements Externalizable {

  public Tomato() { ... }
  public Tomato (String color, int weight) { ... }
}
----

ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

=== Message

Add a no-arg constructor to this class.


endif::env-github,rspecator-view[]