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/**
* Copyright (c) 2013, impossibl.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of impossibl.com nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package com.impossibl.postgres.system.procs;
import com.impossibl.postgres.system.Context;
import com.impossibl.postgres.system.ConversionException;
import com.impossibl.postgres.system.ServerInfo;
import com.impossibl.postgres.types.Type;
import static com.impossibl.postgres.system.procs.DatesTimes.JAVA_DATE_NEGATIVE_INFINITY_MSECS;
import static com.impossibl.postgres.system.procs.DatesTimes.JAVA_DATE_POSITIVE_INFINITY_MSECS;
import static com.impossibl.postgres.system.procs.DatesTimes.NEG_INFINITY;
import static com.impossibl.postgres.system.procs.DatesTimes.POS_INFINITY;
import static com.impossibl.postgres.system.procs.DatesTimes.javaEpochToPg;
import static com.impossibl.postgres.system.procs.DatesTimes.pgEpochToJava;
import java.io.IOException;
import java.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.temporal.ChronoUnit;
import java.time.temporal.TemporalAccessor;
import java.util.Calendar;
import static java.util.concurrent.TimeUnit.MICROSECONDS;
import static java.util.concurrent.TimeUnit.NANOSECONDS;
import static java.util.concurrent.TimeUnit.SECONDS;
import io.netty.buffer.ByteBuf;
public class TimestampsWithoutTZ extends SettingSelectProcProvider {
public TimestampsWithoutTZ() {
super(ServerInfo::hasIntegerDateTimes,
new TxtEncoder(), new TxtDecoder(), new BinEncoder(), new BinDecoder(),
new TxtEncoder(), new TxtDecoder(), null, null,
"timestamp_");
}
private static LocalDateTime convertInput(Context context, Type type, Object value, Calendar sourceCalendar) throws ConversionException {
if (value instanceof LocalDateTime) {
return (LocalDateTime) value;
}
if (value instanceof CharSequence) {
CharSequence chars = (CharSequence) value;
if (value.equals(POS_INFINITY)) return LocalDateTime.MAX;
if (value.equals(NEG_INFINITY)) return LocalDateTime.MIN;
TemporalAccessor parsed = context.getClientTimestampFormat().getParser().parse(chars);
return LocalDateTime.from(parsed);
}
if (value instanceof Timestamp) {
Timestamp ts = (Timestamp) value;
if (ts.getTime() == JAVA_DATE_POSITIVE_INFINITY_MSECS) return LocalDateTime.MAX;
if (ts.getTime() == JAVA_DATE_NEGATIVE_INFINITY_MSECS) return LocalDateTime.MIN;
return ts.toInstant().atZone(sourceCalendar.getTimeZone().toZoneId()).toLocalDateTime();
}
else if (value instanceof Time) {
Time t = (Time) value;
if (t.getTime() == JAVA_DATE_POSITIVE_INFINITY_MSECS) return LocalDateTime.MAX;
if (t.getTime() == JAVA_DATE_NEGATIVE_INFINITY_MSECS) return LocalDateTime.MIN;
return Instant.ofEpochMilli(t.getTime()).atZone(sourceCalendar.getTimeZone().toZoneId()).toLocalDateTime();
}
else if (value instanceof Date) {
Date d = (Date) value;
if (d.getTime() == JAVA_DATE_POSITIVE_INFINITY_MSECS) return LocalDateTime.MAX;
if (d.getTime() == JAVA_DATE_NEGATIVE_INFINITY_MSECS) return LocalDateTime.MIN;
return Instant.ofEpochMilli(d.getTime()).atZone(sourceCalendar.getTimeZone().toZoneId()).toLocalDateTime();
}
throw new ConversionException(value.getClass(), type);
}
private static Object convertInfinityOutput(boolean positive, Type type, Class targetClass) throws ConversionException {
if (targetClass == LocalDateTime.class) {
return positive ? LocalDateTime.MAX : LocalDateTime.MIN;
}
if (targetClass == LocalDate.class) {
return positive ? LocalDate.MAX : LocalDate.MIN;
}
if (targetClass == String.class) {
return positive ? POS_INFINITY : NEG_INFINITY;
}
if (targetClass == Time.class) {
return new Time(positive ? JAVA_DATE_POSITIVE_INFINITY_MSECS : JAVA_DATE_NEGATIVE_INFINITY_MSECS);
}
if (targetClass == Date.class) {
return new Date(positive ? JAVA_DATE_POSITIVE_INFINITY_MSECS : JAVA_DATE_NEGATIVE_INFINITY_MSECS);
}
if (targetClass == Timestamp.class) {
return new Timestamp(positive ? JAVA_DATE_POSITIVE_INFINITY_MSECS : JAVA_DATE_NEGATIVE_INFINITY_MSECS);
}
throw new ConversionException(type, targetClass);
}
private static Object convertOutput(Context context, Type type, LocalDateTime dateTime, Class targetClass, Calendar targetCalendar) throws ConversionException {
if (targetClass == LocalDateTime.class) {
return dateTime;
}
if (targetClass == LocalDate.class) {
return dateTime.toLocalDate();
}
if (targetClass == String.class) {
return context.getClientTimestampFormat().getPrinter().format(dateTime);
}
ZoneId targetZoneId = targetCalendar.getTimeZone().toZoneId();
ZonedDateTime zonedDateTime = dateTime.atOffset(ZoneOffset.UTC).atZoneSimilarLocal(targetZoneId);
if (targetClass == Time.class) {
return new Time(zonedDateTime.withYear(1970).withDayOfYear(1).toInstant().toEpochMilli());
}
if (targetClass == Date.class) {
return new Date(zonedDateTime.truncatedTo(ChronoUnit.DAYS).toInstant().toEpochMilli());
}
if (targetClass == Timestamp.class) {
return Timestamp.from(zonedDateTime.toInstant());
}
throw new ConversionException(type, targetClass);
}
private static class BinDecoder extends BaseBinaryDecoder {
BinDecoder() {
super(8);
}
@Override
public Class getDefaultClass() {
return Timestamp.class;
}
@Override
protected Object decodeValue(Context context, Type type, Short typeLength, Integer typeModifier, ByteBuf buffer, Class targetClass, Object targetContext) throws IOException {
Calendar calendar = targetContext != null ? (Calendar) targetContext : Calendar.getInstance();
long micros = buffer.readLong();
if (micros == Long.MAX_VALUE || micros == Long.MIN_VALUE) {
return convertInfinityOutput(micros == Long.MAX_VALUE, type, targetClass);
}
micros = pgEpochToJava(micros, MICROSECONDS);
long secs = MICROSECONDS.toSeconds(micros);
long nanos = MICROSECONDS.toNanos(micros % SECONDS.toMicros(1));
if (nanos < 0) {
nanos += SECONDS.toNanos(1);
secs--;
}
LocalDateTime localDateTime = LocalDateTime.ofEpochSecond(secs, (int) nanos, ZoneOffset.UTC);
return convertOutput(context, type, localDateTime, targetClass, calendar);
}
}
private static class BinEncoder extends BaseBinaryEncoder {
BinEncoder() {
super(8);
}
@Override
protected void encodeValue(Context context, Type type, Object value, Object sourceContext, ByteBuf buffer) throws IOException {
Calendar calendar = sourceContext != null ? (Calendar) sourceContext : Calendar.getInstance();
LocalDateTime dateTime = convertInput(context, type, value, calendar);
long micros;
if (dateTime.equals(LocalDateTime.MAX)) {
micros = Long.MAX_VALUE;
}
else if (dateTime.equals(LocalDateTime.MIN)) {
micros = Long.MIN_VALUE;
}
else {
long seconds = javaEpochToPg(dateTime.toEpochSecond(ZoneOffset.UTC), SECONDS);
// Convert to micros rounding nanoseconds
micros = SECONDS.toMicros(seconds) + NANOSECONDS.toMicros(dateTime.getNano() + 500);
}
buffer.writeLong(micros);
}
}
private static class TxtDecoder extends BaseTextDecoder {
public Class getDefaultClass() {
return Timestamp.class;
}
@Override
protected Object decodeValue(Context context, Type type, Short typeLength, Integer typeModifier, CharSequence buffer, Class targetClass, Object targetContext) throws IOException {
Calendar calendar = targetContext != null ? (Calendar) targetContext : Calendar.getInstance();
if (buffer.equals(POS_INFINITY) || buffer.equals(NEG_INFINITY)) {
return convertInfinityOutput(buffer.equals(POS_INFINITY), type, targetClass);
}
TemporalAccessor parsed = context.getServerTimestampFormat().getParser().parse(buffer);
LocalDateTime localDateTime = LocalDateTime.from(parsed);
return convertOutput(context, type, localDateTime, targetClass, calendar);
}
}
private static class TxtEncoder extends BaseTextEncoder {
@Override
protected void encodeValue(Context context, Type type, Object value, Object sourceContext, StringBuilder buffer) throws IOException {
Calendar calendar = sourceContext != null ? (Calendar) sourceContext : Calendar.getInstance();
LocalDateTime dateTime = convertInput(context, type, value, calendar);
if (dateTime.equals(LocalDateTime.MAX)) {
buffer.append(POS_INFINITY);
}
else if (dateTime.equals(LocalDateTime.MIN)) {
buffer.append(NEG_INFINITY);
}
else {
String strVal = context.getServerTimestampFormat().getPrinter().format(dateTime);
buffer.append(strVal);
}
}
}
}