loading .ahs files in the api

[idhamari]

Handling issue 433. API currently does not provide a way to load .ahs files.

One can test by modifying example 24 as follows:

    builder1.save("age.ahs");
    HierarchyBuilderRedactionBased<?> ageBuilder = new HierarchyBuilderRedactionBased();
    ageBuilder.load("age.ahs", "age", data.getHandle());
    //data.getDefinition().setAttributeType("age", builder1);

[prasser]

Not needed. You can use HierarchyBuilder.create(File file) to load ahs files.

[idhamari]

I think after using create one still needs to prepare and build which main more coding when dealing with too many attributes. Probably the PR is not the best way to handle this but it saves time as one needs only one line per attribute.

Still, I think it is better to keep this PR close until finding a better way.