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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.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.Timestamp;
import java.time.LocalDate;
import java.time.temporal.TemporalAccessor;
import java.util.Calendar;
import static java.util.concurrent.TimeUnit.DAYS;
import io.netty.buffer.ByteBuf;
public class Dates extends SimpleProcProvider {
public Dates() {
super(new TxtEncoder(), new TxtDecoder(), new BinEncoder(), new BinDecoder(), "date_");
}
private static LocalDate convertInput(Context context, Type type, Object value, Calendar sourceCalendar) throws ConversionException {
if (value instanceof LocalDate) {
return (LocalDate) value;
}
if (value instanceof Timestamp) {
Timestamp ts = (Timestamp) value;
if (ts.getTime() == JAVA_DATE_POSITIVE_INFINITY_MSECS) return LocalDate.MAX;
if (ts.getTime() == JAVA_DATE_NEGATIVE_INFINITY_MSECS) return LocalDate.MIN;
return ts.toInstant().atZone(sourceCalendar.getTimeZone().toZoneId()).toLocalDate();
}
if (value instanceof Date) {
Date d = (Date) value;
if (d.getTime() == JAVA_DATE_POSITIVE_INFINITY_MSECS) return LocalDate.MAX;
if (d.getTime() == JAVA_DATE_NEGATIVE_INFINITY_MSECS) return LocalDate.MIN;
Calendar calendar = Calendar.getInstance(sourceCalendar.getTimeZone());
calendar.clear();
calendar.setTimeInMillis(d.getTime());
int year = calendar.get(Calendar.ERA) == 0 ? -(calendar.get(Calendar.YEAR) - 1) : calendar.get(Calendar.YEAR);
return LocalDate.of(year, calendar.get(Calendar.MONTH) + 1, calendar.get(Calendar.DAY_OF_MONTH));
}
if (value instanceof CharSequence) {
CharSequence s = (CharSequence) value;
if (s.equals(POS_INFINITY)) return LocalDate.MAX;
if (s.equals(NEG_INFINITY)) return LocalDate.MIN;
TemporalAccessor parsed = context.getClientDateFormat().getParser().parse(s);
return LocalDate.from(parsed);
}
throw new ConversionException(value.getClass(), type);
}
private static Object convertInfinityOutput(boolean positive, Type type, Class targetClass) throws ConversionException {
if (targetClass == LocalDate.class) {
return positive ? LocalDate.MAX : LocalDate.MIN;
}
if (targetClass == String.class) {
return positive ? POS_INFINITY : NEG_INFINITY;
}
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, LocalDate date, Class targetClass, Calendar targetCalendar) throws ConversionException {
if (targetClass == LocalDate.class) {
return date;
}
if (targetClass == String.class) {
return context.getClientDateFormat().getPrinter().format(date);
}
if (targetClass == Timestamp.class) {
targetCalendar.clear();
targetCalendar.set(date.getYear(), date.getMonthValue() - 1, date.getDayOfMonth());
return new Timestamp(targetCalendar.getTimeInMillis());
}
if (targetClass == Date.class) {
targetCalendar.clear();
targetCalendar.set(date.getYear(), date.getMonthValue() - 1, date.getDayOfMonth());
return new Date(targetCalendar.getTimeInMillis());
}
throw new ConversionException(type, targetClass);
}
static class BinDecoder extends BaseBinaryDecoder {
BinDecoder() {
super(4);
}
@Override
public Class getDefaultClass() {
return Date.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();
int daysPg = buffer.readInt();
if (daysPg == Integer.MAX_VALUE || daysPg == Integer.MIN_VALUE) {
return convertInfinityOutput(daysPg == Integer.MAX_VALUE, type, targetClass);
}
LocalDate date = LocalDate.ofEpochDay(pgEpochToJava(daysPg, DAYS));
return convertOutput(context, type, date, targetClass, calendar);
}
}
static class BinEncoder extends BaseBinaryEncoder {
BinEncoder() {
super(4);
}
@Override
protected void encodeValue(Context context, Type type, Object value, Object sourceContext, ByteBuf buffer) throws IOException {
Calendar calendar = sourceContext != null ? (Calendar) sourceContext : Calendar.getInstance();
LocalDate date = convertInput(context, type, value, calendar);
if (date == LocalDate.MAX) {
buffer.writeInt(Integer.MAX_VALUE);
}
else if (date == LocalDate.MIN) {
buffer.writeInt(Integer.MIN_VALUE);
}
else {
int daysPg = (int) javaEpochToPg(date.toEpochDay(), DAYS);
buffer.writeInt(daysPg);
}
}
}
static class TxtDecoder extends BaseTextDecoder {
@Override
public Class getDefaultClass() {
return Date.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.getServerDateFormat().getParser().parse(buffer);
LocalDate date = LocalDate.from(parsed);
return convertOutput(context, type, date, targetClass, calendar);
}
}
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();
LocalDate date = convertInput(context, type, value, calendar);
if (date == LocalDate.MAX) {
buffer.append(POS_INFINITY);
}
else if (date == LocalDate.MIN) {
buffer.append(NEG_INFINITY);
}
else {
String strVal = context.getServerDateFormat().getPrinter().format(date);
buffer.append(strVal);
}
}
}
}