}
        final List<String> fields = SuggestUtil.getAsList(source.get(FieldNames.FIELDS));
        final long docFreq = Long.parseLong(source.get(FieldNames.DOC_FREQ).toString());
        final long queryFreq = Long.parseLong(source.get(FieldNames.QUERY_FREQ).toString());
        final float userBoost = Float.parseFloat(source.get(FieldNames.USER_BOOST).toString());

        final Object obj = get(key);

        final long value;
        if (obj == null) {
            value = defaultValue;
        } else {
            value = Long.parseLong(obj.toString());
        }

        return value;
    }

    /**
     * Retrieves a setting value as a float.
     * @param key The key of the setting.