### Question:
LongConverter implements AtlasConverter<Long> { @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DATE_TIME_TZ) public Date toDate(Long date) { if (date >= Instant.MIN.getEpochSecond()) { return Date.from(Instant.ofEpochMilli(date)); } return new Date(date); }  @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DECIMAL) BigDecimal toBigDecimal(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.BIG_INTEGER) BigInteger toBigInteger(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.BOOLEAN, concerns = AtlasConversionConcern.CONVENTION) Boolean toBoolean(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.BYTE, concerns = AtlasConversionConcern.RANGE) Byte toByte(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.CHAR, concerns = { AtlasConversionConcern.RANGE, AtlasConversionConcern.CONVENTION }) Character toCharacter(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DATE_TIME_TZ) Date toDate(Long date); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DOUBLE) Double toDouble(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.FLOAT) Float toFloat(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.INTEGER, concerns = AtlasConversionConcern.RANGE) Integer toInteger(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DATE) LocalDate toLocalDate(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.TIME) LocalTime toLocalTime(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DATE_TIME) LocalDateTime toLocalDateTime(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.LONG) Long toLong(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.SHORT, concerns = AtlasConversionConcern.RANGE) Short toShort(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.NUMBER) Number toNumber(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.STRING) String toString(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DATE_TIME_TZ) ZonedDateTime toZonedDateTime(Long value);  }### Answer:
@Test public void toDate() throws Exception { Date date = converter.toDate(Long.MAX_VALUE); assertNotNull(date); date = converter.toDate(Long.MIN_VALUE); assertNotNull(date); date = converter.toDate(Long.parseLong("0")); assertTrue(date.toInstant().toString().equals("1970-01-01T00:00:00Z")); }