final List<Map<String, Object>> records = new ArrayList<>(512);
final String[] fieldNames = format.getFieldNames();
final int fieldNumber = fieldNames.length;

for (Record record = null; (record = file.readNextEqual(key)) != null;) {
   final Map<String, Object> valuesMap = new HashMap<>(fieldNumber);
   final Object[] fieldValues = record.getFields();

   for (int i = 0; i < fieldNumber; i++) {
      valuesMap.put(fieldNames[i], fieldValues[i]);
   }

   records.add(valuesMap);
}