What is required of a class used as an entry or attribute?

Tim Rohaly

Attributes must conform to some strict rules:

  • Must implement net.jini.core.entry.Entry (which itself extends Serializable)
  • Must have only public instance variables (transient, final, static, and non-public variables will not be serialized)
  • All instance variables must be references to serializable objects, primitive types are not allowed
  • Must have a public, no-argument constructor

An IllegalArgumentException will be thrown during serialization if the attribute has a non-object instance variable or lacks a no-argument constructor.

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