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/*
* Copyright 2013 FasterXML.com
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the license for the specific language governing permissions and
* limitations under the license.
*/
package com.fasterxml.jackson.datatype.jsr310.deser;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonTokenId;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.datatype.jsr310.DecimalUtils;
import java.io.IOException;
import java.math.BigDecimal;
import java.time.DateTimeException;
import java.time.Instant;
import java.time.OffsetDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.Temporal;
import java.time.temporal.TemporalAccessor;
import java.util.function.BiFunction;
import java.util.function.Function;
/**
* Deserializer for Java 8 temporal {@link Instant}s, {@link OffsetDateTime}, and {@link ZonedDateTime}s.
*
* @author Nick Williams
* @since 2.2
*/
public class InstantDeserializer
extends JSR310DateTimeDeserializerBase
{
private static final long serialVersionUID = 1L;
public static final InstantDeserializer INSTANT = new InstantDeserializer<>(
Instant.class, DateTimeFormatter.ISO_INSTANT,
Instant::from,
a -> Instant.ofEpochMilli(a.value),
a -> Instant.ofEpochSecond(a.integer, a.fraction),
null,
true // yes, replace +0000 with Z
);
public static final InstantDeserializer OFFSET_DATE_TIME = new InstantDeserializer<>(
OffsetDateTime.class, DateTimeFormatter.ISO_OFFSET_DATE_TIME,
OffsetDateTime::from,
a -> OffsetDateTime.ofInstant(Instant.ofEpochMilli(a.value), a.zoneId),
a -> OffsetDateTime.ofInstant(Instant.ofEpochSecond(a.integer, a.fraction), a.zoneId),
(d, z) -> d.withOffsetSameInstant(z.getRules().getOffset(d.toLocalDateTime())),
true // yes, replace +0000 with Z
);
public static final InstantDeserializer ZONED_DATE_TIME = new InstantDeserializer<>(
ZonedDateTime.class, DateTimeFormatter.ISO_ZONED_DATE_TIME,
ZonedDateTime::from,
a -> ZonedDateTime.ofInstant(Instant.ofEpochMilli(a.value), a.zoneId),
a -> ZonedDateTime.ofInstant(Instant.ofEpochSecond(a.integer, a.fraction), a.zoneId),
ZonedDateTime::withZoneSameInstant,
false // keep +0000 and Z separate since zones explicitly supported
);
protected final Function fromMilliseconds;
protected final Function fromNanoseconds;
protected final Function parsedToValue;
protected final BiFunction adjust;
/**
* In case of vanilla `Instant` we seem to need to translate "+0000"
* timezone designator into plain "Z" for some reason; see
* [datatype-jsr310#79] for more info
*
* @since 2.7.5
*/
protected final boolean replace0000AsZ;
protected InstantDeserializer(Class supportedType,
DateTimeFormatter formatter,
Function parsedToValue,
Function fromMilliseconds,
Function fromNanoseconds,
BiFunction adjust,
boolean replace0000AsZ)
{
super(supportedType, formatter);
this.parsedToValue = parsedToValue;
this.fromMilliseconds = fromMilliseconds;
this.fromNanoseconds = fromNanoseconds;
this.adjust = adjust == null ? ((d, z) -> d) : adjust;
this.replace0000AsZ = replace0000AsZ;
}
@SuppressWarnings("unchecked")
protected InstantDeserializer(InstantDeserializer base, DateTimeFormatter f)
{
super((Class) base.handledType(), f);
parsedToValue = base.parsedToValue;
fromMilliseconds = base.fromMilliseconds;
fromNanoseconds = base.fromNanoseconds;
adjust = base.adjust;
replace0000AsZ = (_formatter == DateTimeFormatter.ISO_INSTANT);
}
@Override
protected JsonDeserializer withDateFormat(DateTimeFormatter dtf) {
if (dtf == _formatter) {
return this;
}
return new InstantDeserializer(this, dtf);
}
@SuppressWarnings("unchecked")
@Override
public T deserialize(JsonParser parser, DeserializationContext context) throws IOException
{
//NOTE: Timestamps contain no timezone info, and are always in configured TZ. Only
//string values have to be adjusted to the configured TZ.
switch (parser.getCurrentTokenId())
{
case JsonTokenId.ID_NUMBER_FLOAT:
return _fromDecimal(context, parser.getDecimalValue());
case JsonTokenId.ID_NUMBER_INT:
return _fromLong(context, parser.getLongValue());
case JsonTokenId.ID_STRING:
{
String string = parser.getText().trim();
if (string.length() == 0) {
return null;
}
// 22-Jan-2016, [datatype-jsr310#16]: Allow quoted numbers too
int dots = _countPeriods(string);
if (dots >= 0) { // negative if not simple number
try {
if (dots == 0) {
return _fromLong(context, Long.parseLong(string));
}
if (dots == 1) {
return _fromDecimal(context, new BigDecimal(string));
}
} catch (NumberFormatException e) {
// fall through to default handling, to get error there
}
}
// 24-May-2016, tatu: as per [datatype-jsr310#79] seems like we need
// some massaging in some cases...
if (replace0000AsZ) {
if (string.endsWith("+0000")) {
string = string.substring(0, string.length()-5) + "Z";
}
}
T value;
try {
TemporalAccessor acc = _formatter.parse(string);
value = parsedToValue.apply(acc);
if (context.isEnabled(DeserializationFeature.ADJUST_DATES_TO_CONTEXT_TIME_ZONE)) {
return adjust.apply(value, this.getZone(context));
}
} catch (DateTimeException e) {
value = _rethrowDateTimeException(parser, context, e, string);
}
return value;
}
case JsonTokenId.ID_EMBEDDED_OBJECT:
// 20-Apr-2016, tatu: Related to [databind#1208], can try supporting embedded
// values quite easily
return (T) parser.getEmbeddedObject();
}
throw context.mappingException("Expected type float, integer, or string.");
}
/**
* Helper method to find Strings of form "all digits" and "digits-comma-digits"
*/
protected int _countPeriods(String str)
{
int commas = 0;
for (int i = 0, end = str.length(); i < end; ++i) {
int ch = str.charAt(i);
if (ch < '0' || ch > '9') {
if (ch == '.') {
++commas;
} else {
return -1;
}
}
}
return commas;
}
protected T _fromLong(DeserializationContext context, long timestamp)
{
if(context.isEnabled(DeserializationFeature.READ_DATE_TIMESTAMPS_AS_NANOSECONDS)){
return fromNanoseconds.apply(new FromDecimalArguments(
timestamp, 0, this.getZone(context)
));
}
return fromMilliseconds.apply(new FromIntegerArguments(
timestamp, this.getZone(context)));
}
protected T _fromDecimal(DeserializationContext context, BigDecimal value)
{
long seconds = value.longValue();
int nanoseconds = DecimalUtils.extractNanosecondDecimal(value, seconds);
return fromNanoseconds.apply(new FromDecimalArguments(
seconds, nanoseconds, getZone(context)));
}
private ZoneId getZone(DeserializationContext context)
{
// Instants are always in UTC, so don't waste compute cycles
return (_valueClass == Instant.class) ? null : context.getTimeZone().toZoneId();
}
private static class FromIntegerArguments
{
public final long value;
public final ZoneId zoneId;
private FromIntegerArguments(long value, ZoneId zoneId)
{
this.value = value;
this.zoneId = zoneId;
}
}
private static class FromDecimalArguments
{
public final long integer;
public final int fraction;
public final ZoneId zoneId;
private FromDecimalArguments(long integer, int fraction, ZoneId zoneId)
{
this.integer = integer;
this.fraction = fraction;
this.zoneId = zoneId;
}
}
}
