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ru.yandex.clickhouse.response.parser.ClickHouseDateValueParser Maven / Gradle / Ivy
package ru.yandex.clickhouse.response.parser;
import java.math.BigInteger;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.time.format.ResolverStyle;
import java.util.Objects;
import java.util.TimeZone;
import java.util.regex.Pattern;
import ru.yandex.clickhouse.except.ClickHouseException;
import ru.yandex.clickhouse.except.ClickHouseUnknownException;
import ru.yandex.clickhouse.response.ByteFragment;
import ru.yandex.clickhouse.response.ClickHouseColumnInfo;
abstract class ClickHouseDateValueParser extends ClickHouseValueParser {
private static final Pattern PATTERN_EMPTY_DATE =
Pattern.compile("^(0000-00-00|0000-00-00 00:00:00|0)$");
private static final DateTimeFormatter DATE_FORMATTER =
DateTimeFormatter.ofPattern("yyyy[-]MM[-]dd");
private static final DateTimeFormatter DATE_TIME_FORMATTER =
DateTimeFormatter.ofPattern("yyyy-MM-dd['T'][ ]HH:mm:ss");
private static final DateTimeFormatter TIME_FORMATTER_NUMBERS =
DateTimeFormatter.ofPattern("HH[mm][ss]")
.withResolverStyle(ResolverStyle.STRICT);
private final Class clazz;
protected ClickHouseDateValueParser(Class clazz) {
this.clazz = Objects.requireNonNull(clazz);
}
protected LocalDateTime dateToLocalDate(String value, ClickHouseColumnInfo columnInfo, TimeZone timeZone) {
return parseAsLocalDate(value).atStartOfDay();
}
protected LocalDateTime dateTimeToLocalDateTime(String value, ClickHouseColumnInfo columnInfo, TimeZone timeZone) {
TimeZone serverTimeZone = columnInfo.getTimeZone();
LocalDateTime localDateTime = parseAsLocalDateTime(value);
if (serverTimeZone != null
&& (serverTimeZone.useDaylightTime() || serverTimeZone.getRawOffset() > 0)) { // non-UTC
localDateTime = localDateTime.atZone(columnInfo.getTimeZone().toZoneId())
.withZoneSameInstant(java.time.ZoneId.of("UTC")).toLocalDateTime();
}
return localDateTime;
}
protected ZonedDateTime dateToZonedDateTime(String value, ClickHouseColumnInfo columnInfo, TimeZone timeZone) {
LocalDate localDate = parseAsLocalDate(value);
return localDate.atStartOfDay(timeZone != null ? timeZone.toZoneId() : ZoneId.systemDefault());
}
protected ZonedDateTime dateTimeToZonedDateTime(String value, ClickHouseColumnInfo columnInfo, TimeZone timeZone) {
LocalDateTime localDateTime = parseAsLocalDateTime(value);
return timeZone != null && !timeZone.equals(columnInfo.getTimeZone())
? localDateTime.atZone(columnInfo.getTimeZone().toZoneId()).withZoneSameInstant(timeZone.toZoneId())
: localDateTime.atZone(columnInfo.getTimeZone().toZoneId());
}
@Override
public T parse(ByteFragment value, ClickHouseColumnInfo columnInfo, TimeZone timeZone) throws ClickHouseException {
if (value.isNull()) {
return null;
}
String s = value.asString();
/*
* filter default values for relevant data types,
* even if the column has nullable flag set.
*/
if (PATTERN_EMPTY_DATE.matcher(s).matches()) {
return null;
}
switch (columnInfo.getEffectiveClickHouseDataType()) {
case Date:
try {
return parseDate(s, columnInfo, timeZone);
} catch (Exception e) {
throw new ClickHouseUnknownException(
"Error parsing '" + s + "' of data type '"
+ columnInfo.getOriginalTypeName()
+ "' as " + clazz.getName(),
e);
}
case DateTime:
case DateTime32:
case DateTime64:
try {
return parseDateTime(s, columnInfo, timeZone);
} catch (Exception e) {
throw new ClickHouseUnknownException(
"Error parsing '" + s + "' of data type '"
+ columnInfo.getOriginalTypeName()
+ "' as " + clazz.getName(),
e);
}
case Int8:
case Int16:
case Int32:
case Int64:
case UInt8:
case UInt16:
case UInt32:
try {
long l = Long.parseLong(s);
return parseNumber(l, columnInfo, timeZone);
} catch (Exception e) {
throw new ClickHouseUnknownException(
"Error parsing '" + s + "' of data type '"
+ columnInfo.getOriginalTypeName()
+ "' as " + clazz.getName(),
e);
}
case UInt64:
// If we have a large nanos value, we trim to millis
try {
BigInteger bi = new BigInteger(s);
if (bi.compareTo(BigInteger.valueOf(Long.MAX_VALUE)) > 0) {
return parseNumber(
bi.divide(BigInteger.valueOf(1000_000L)).longValue(),
columnInfo,
timeZone);
}
return parseNumber(bi.longValue(), columnInfo, timeZone);
} catch (Exception e) {
throw new ClickHouseUnknownException(
"Error parsing '" + s + "' of data type '"
+ columnInfo.getOriginalTypeName()
+ "' as " + clazz.getName(),
e);
}
case String:
case Unknown:
try {
return parseOther(s, columnInfo, timeZone);
} catch (Exception e) {
throw new ClickHouseUnknownException(
"Error parsing '" + s + "' as " + clazz.getName(), e);
}
default:
throw new ClickHouseUnknownException(
"Error parsing '" + s + "' of data type '"
+ columnInfo.getOriginalTypeName()
+ "' as " + clazz.getName(),
null);
}
}
abstract T parseDate(String value, ClickHouseColumnInfo columnInfo,
TimeZone timeZone);
abstract T parseDateTime(String value, ClickHouseColumnInfo columnInfo,
TimeZone timeZone);
abstract T parseNumber(long value, ClickHouseColumnInfo columnInfo,
TimeZone timeZone);
abstract T parseOther(String value, ClickHouseColumnInfo columnInfo,
TimeZone timeZone);
protected final ZoneId effectiveTimeZone(ClickHouseColumnInfo columnInfo,
TimeZone timeZone) {
return timeZone != null
? timeZone.toZoneId()
: columnInfo.getTimeZone() != null
? columnInfo.getTimeZone().toZoneId()
: ZoneId.systemDefault();
}
protected final LocalDate parseAsLocalDate(String value) {
return LocalDate.parse(value, DATE_FORMATTER);
}
protected final LocalDateTime parseAsLocalDateTime(String value) {
int index = Objects.requireNonNull(value).indexOf('.');
if (index > 0) {
int endIndex = -1;
for (int i = index + 1, len = value.length(); i < len; i++) {
char ch = value.charAt(i);
if (!Character.isDigit(ch)) {
endIndex = i;
break;
}
}
String part1 = value.substring(0, index);
if (endIndex > index) {
part1 += value.substring(endIndex);
}
String part2 = endIndex > index ? value.substring(index, endIndex) : value.substring(index);
LocalDateTime ts = LocalDateTime.parse(part1, DATE_TIME_FORMATTER);
int nanoSeconds = (int) Math.round(Double.parseDouble(part2) * 1000000000);
return LocalDateTime.of(ts.getYear(), ts.getMonth(), ts.getDayOfMonth(),
ts.getHour(), ts.getMinute(), ts.getSecond(), nanoSeconds);
}
return LocalDateTime.parse(value, DATE_TIME_FORMATTER);
}
protected final OffsetDateTime parseAsOffsetDateTime(String value) {
return OffsetDateTime.parse(value, DateTimeFormatter.ISO_DATE_TIME);
}
protected final Instant parseAsInstant(String value) {
try {
long l = Long.parseLong(value);
return parseAsInstant(l);
} catch (NumberFormatException nfe) {
throw new DateTimeParseException("unparsable as long", value, -1, nfe);
}
}
protected final Instant parseAsInstant(long value) {
return value > Integer.MAX_VALUE
? Instant.ofEpochMilli(value)
: Instant.ofEpochSecond(value);
}
protected final LocalTime parseAsLocalTime(String value) {
return LocalTime.parse(
value.length() % 2 == 0 ? value : "0" + value,
TIME_FORMATTER_NUMBERS);
}
protected final LocalTime parseAsLocalTime(long value) {
return parseAsLocalTime(String.valueOf(value));
}
}
