NormalizationHelper is not serializable

[andrewthomas28]

The class NormalizationHelper is marked and documented to be serializable. However, it is not. An attempt to serialize a NormalizationHelper results in a NotSerializableException.

From the code:

public class NormalizationHelper implements Serializable ...

From the "Encog Quick Start Guide," v3.3, at https://s3.amazonaws.com/heatonresearch-books/free/encog-3_3-quickstart.pdf:

"You can also serialize the normalization helper."

The problem is caused at least by the following:

• NormalizationHelper has a field of type NormalizationStrategy, which is not marked Serializable.
• The concrete subclass of NormalizationStrategy is BasicNormalizationStrategy, which: * Is also not marked Serializable. * Holds (indirectly through maps) references to instances of subclasses of Normalizer, none of which are marked serializable.

[andrewthomas28]

Addressed in pull request https://github.com/encog/encog-java-core/pull/195 .

[jeffheaton]

Thanks for the fix and unit test.