Add new endpoint to return Jans table info :
public Map<String, Map<String, AttributeType>> getTableColumnsMap()

Format of result data:
Map<table_name, Map<attribute_name, AttributeType>

Example:
{janshealthentry={jansservice=AttributeType [name=jansservice, defName=jansService, type=varchar, multiValued=false], creationdate=AttributeType [name=creationdate, defName=creationDate, type=timestamp, multiValued=false], ....