Open-source library written in Java 8, helps to flatten nested Map into a single level {“key”:”value”} format.
https://github.com/skirdey/flatty
As an example, it could flatten an Map object that looks like this:
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{ "key": { "col": [ 1, 2, {}, { "a": "b", "c": [ null, 1, "string", true ] }, [] ] } } |
to
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{ "key__col[0]": 1, "key__col[1]": 2, "key__col[2]": {}, "key__col[3]__a": "b", "key__col[3]__c[0]": null, "key__col[3]__c[1]": 1, "key__col[3]__c[2]": "string", "key__col[3]__c[3]": true, "key__col[4]": [] } |
and unflatten it back.