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The Parsed.java Java example source code
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
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* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
/*
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file:
*
* Copyright (c) 2008-2013, Stephen Colebourne & Michael Nascimento Santos
*
* 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
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* 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
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package java.time.format;
import static java.time.temporal.ChronoField.AMPM_OF_DAY;
import static java.time.temporal.ChronoField.CLOCK_HOUR_OF_AMPM;
import static java.time.temporal.ChronoField.CLOCK_HOUR_OF_DAY;
import static java.time.temporal.ChronoField.HOUR_OF_AMPM;
import static java.time.temporal.ChronoField.HOUR_OF_DAY;
import static java.time.temporal.ChronoField.MICRO_OF_DAY;
import static java.time.temporal.ChronoField.MICRO_OF_SECOND;
import static java.time.temporal.ChronoField.MILLI_OF_DAY;
import static java.time.temporal.ChronoField.MILLI_OF_SECOND;
import static java.time.temporal.ChronoField.MINUTE_OF_DAY;
import static java.time.temporal.ChronoField.MINUTE_OF_HOUR;
import static java.time.temporal.ChronoField.NANO_OF_DAY;
import static java.time.temporal.ChronoField.NANO_OF_SECOND;
import static java.time.temporal.ChronoField.SECOND_OF_DAY;
import static java.time.temporal.ChronoField.SECOND_OF_MINUTE;
import java.time.DateTimeException;
import java.time.LocalDate;
import java.time.LocalTime;
import java.time.Period;
import java.time.ZoneId;
import java.time.chrono.ChronoLocalDate;
import java.time.chrono.ChronoLocalDateTime;
import java.time.chrono.ChronoZonedDateTime;
import java.time.chrono.Chronology;
import java.time.temporal.ChronoField;
import java.time.temporal.TemporalAccessor;
import java.time.temporal.TemporalField;
import java.time.temporal.TemporalQueries;
import java.time.temporal.TemporalQuery;
import java.time.temporal.UnsupportedTemporalTypeException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.Set;
/**
* A store of parsed data.
* <p>
* This class is used during parsing to collect the data. Part of the parsing process
* involves handling optional blocks and multiple copies of the data get created to
* support the necessary backtracking.
* <p>
* Once parsing is completed, this class can be used as the resultant {@code TemporalAccessor}.
* In most cases, it is only exposed once the fields have been resolved.
*
* @implSpec
* This class is a mutable context intended for use from a single thread.
* Usage of the class is thread-safe within standard parsing as a new instance of this class
* is automatically created for each parse and parsing is single-threaded
*
* @since 1.8
*/
final class Parsed implements TemporalAccessor {
// some fields are accessed using package scope from DateTimeParseContext
/**
* The parsed fields.
*/
final Map<TemporalField, Long> fieldValues = new HashMap<>();
/**
* The parsed zone.
*/
ZoneId zone;
/**
* The parsed chronology.
*/
Chronology chrono;
/**
* Whether a leap-second is parsed.
*/
boolean leapSecond;
/**
* The effective chronology.
*/
Chronology effectiveChrono;
/**
* The resolver style to use.
*/
private ResolverStyle resolverStyle;
/**
* The resolved date.
*/
private ChronoLocalDate date;
/**
* The resolved time.
*/
private LocalTime time;
/**
* The excess period from time-only parsing.
*/
Period excessDays = Period.ZERO;
/**
* Creates an instance.
*/
Parsed() {
}
/**
* Creates a copy.
*/
Parsed copy() {
// only copy fields used in parsing stage
Parsed cloned = new Parsed();
cloned.fieldValues.putAll(this.fieldValues);
cloned.zone = this.zone;
cloned.chrono = this.chrono;
cloned.leapSecond = this.leapSecond;
return cloned;
}
//-----------------------------------------------------------------------
@Override
public boolean isSupported(TemporalField field) {
if (fieldValues.containsKey(field) ||
(date != null && date.isSupported(field)) ||
(time != null && time.isSupported(field))) {
return true;
}
return field != null && (field instanceof ChronoField == false) && field.isSupportedBy(this);
}
@Override
public long getLong(TemporalField field) {
Objects.requireNonNull(field, "field");
Long value = fieldValues.get(field);
if (value != null) {
return value;
}
if (date != null && date.isSupported(field)) {
return date.getLong(field);
}
if (time != null && time.isSupported(field)) {
return time.getLong(field);
}
if (field instanceof ChronoField) {
throw new UnsupportedTemporalTypeException("Unsupported field: " + field);
}
return field.getFrom(this);
}
@SuppressWarnings("unchecked")
@Override
public <R> R query(TemporalQuery query) {
if (query == TemporalQueries.zoneId()) {
return (R) zone;
} else if (query == TemporalQueries.chronology()) {
return (R) chrono;
} else if (query == TemporalQueries.localDate()) {
return (R) (date != null ? LocalDate.from(date) : null);
} else if (query == TemporalQueries.localTime()) {
return (R) time;
} else if (query == TemporalQueries.zone() || query == TemporalQueries.offset()) {
return query.queryFrom(this);
} else if (query == TemporalQueries.precision()) {
return null; // not a complete date/time
}
// inline TemporalAccessor.super.query(query) as an optimization
// non-JDK classes are not permitted to make this optimization
return query.queryFrom(this);
}
//-----------------------------------------------------------------------
/**
* Resolves the fields in this context.
*
* @param resolverStyle the resolver style, not null
* @param resolverFields the fields to use for resolving, null for all fields
* @return this, for method chaining
* @throws DateTimeException if resolving one field results in a value for
* another field that is in conflict
*/
TemporalAccessor resolve(ResolverStyle resolverStyle, Set<TemporalField> resolverFields) {
if (resolverFields != null) {
fieldValues.keySet().retainAll(resolverFields);
}
this.resolverStyle = resolverStyle;
chrono = effectiveChrono;
resolveFields();
resolveTimeLenient();
crossCheck();
resolvePeriod();
return this;
}
//-----------------------------------------------------------------------
private void resolveFields() {
// resolve ChronoField
resolveDateFields();
resolveTimeFields();
// if any other fields, handle them
// any lenient date resolution should return epoch-day
if (fieldValues.size() > 0) {
int changedCount = 0;
outer:
while (changedCount < 50) {
for (Map.Entry<TemporalField, Long> entry : fieldValues.entrySet()) {
TemporalField targetField = entry.getKey();
TemporalAccessor resolvedObject = targetField.resolve(fieldValues, this, resolverStyle);
if (resolvedObject != null) {
if (resolvedObject instanceof ChronoZonedDateTime) {
ChronoZonedDateTime<?> czdt = (ChronoZonedDateTime) resolvedObject;
if (zone.equals(czdt.getZone()) == false) {
throw new DateTimeException("ChronoZonedDateTime must use the effective parsed zone: " + zone);
}
resolvedObject = czdt.toLocalDateTime();
}
if (resolvedObject instanceof ChronoLocalDateTime) {
ChronoLocalDateTime<?> cldt = (ChronoLocalDateTime) resolvedObject;
updateCheckConflict(cldt.toLocalTime(), Period.ZERO);
updateCheckConflict(cldt.toLocalDate());
changedCount++;
continue outer; // have to restart to avoid concurrent modification
}
if (resolvedObject instanceof ChronoLocalDate) {
updateCheckConflict((ChronoLocalDate) resolvedObject);
changedCount++;
continue outer; // have to restart to avoid concurrent modification
}
if (resolvedObject instanceof LocalTime) {
updateCheckConflict((LocalTime) resolvedObject, Period.ZERO);
changedCount++;
continue outer; // have to restart to avoid concurrent modification
}
throw new DateTimeException("Method resolveFields() can only return ChronoZonedDateTime," +
"ChronoLocalDateTime, ChronoLocalDate or LocalTime");
} else if (fieldValues.containsKey(targetField) == false) {
changedCount++;
continue outer; // have to restart to avoid concurrent modification
}
}
break;
}
if (changedCount == 50) { // catch infinite loops
throw new DateTimeException("One of the parsed fields has an incorrectly implemented resolve method");
}
// if something changed then have to redo ChronoField resolve
if (changedCount > 0) {
resolveDateFields();
resolveTimeFields();
}
}
}
private void updateCheckConflict(TemporalField targetField, TemporalField changeField, Long changeValue) {
Long old = fieldValues.put(changeField, changeValue);
if (old != null && old.longValue() != changeValue.longValue()) {
throw new DateTimeException("Conflict found: " + changeField + " " + old +
" differs from " + changeField + " " + changeValue +
" while resolving " + targetField);
}
}
//-----------------------------------------------------------------------
private void resolveDateFields() {
updateCheckConflict(chrono.resolveDate(fieldValues, resolverStyle));
}
private void updateCheckConflict(ChronoLocalDate cld) {
if (date != null) {
if (cld != null && date.equals(cld) == false) {
throw new DateTimeException("Conflict found: Fields resolved to two different dates: " + date + " " + cld);
}
} else if (cld != null) {
if (chrono.equals(cld.getChronology()) == false) {
throw new DateTimeException("ChronoLocalDate must use the effective parsed chronology: " + chrono);
}
date = cld;
}
}
//-----------------------------------------------------------------------
private void resolveTimeFields() {
// simplify fields
if (fieldValues.containsKey(CLOCK_HOUR_OF_DAY)) {
// lenient allows anything, smart allows 0-24, strict allows 1-24
long ch = fieldValues.remove(CLOCK_HOUR_OF_DAY);
if (resolverStyle == ResolverStyle.STRICT || (resolverStyle == ResolverStyle.SMART && ch != 0)) {
CLOCK_HOUR_OF_DAY.checkValidValue(ch);
}
updateCheckConflict(CLOCK_HOUR_OF_DAY, HOUR_OF_DAY, ch == 24 ? 0 : ch);
}
if (fieldValues.containsKey(CLOCK_HOUR_OF_AMPM)) {
// lenient allows anything, smart allows 0-12, strict allows 1-12
long ch = fieldValues.remove(CLOCK_HOUR_OF_AMPM);
if (resolverStyle == ResolverStyle.STRICT || (resolverStyle == ResolverStyle.SMART && ch != 0)) {
CLOCK_HOUR_OF_AMPM.checkValidValue(ch);
}
updateCheckConflict(CLOCK_HOUR_OF_AMPM, HOUR_OF_AMPM, ch == 12 ? 0 : ch);
}
if (fieldValues.containsKey(AMPM_OF_DAY) && fieldValues.containsKey(HOUR_OF_AMPM)) {
long ap = fieldValues.remove(AMPM_OF_DAY);
long hap = fieldValues.remove(HOUR_OF_AMPM);
if (resolverStyle == ResolverStyle.LENIENT) {
updateCheckConflict(AMPM_OF_DAY, HOUR_OF_DAY, Math.addExact(Math.multiplyExact(ap, 12), hap));
} else { // STRICT or SMART
AMPM_OF_DAY.checkValidValue(ap);
HOUR_OF_AMPM.checkValidValue(ap);
updateCheckConflict(AMPM_OF_DAY, HOUR_OF_DAY, ap * 12 + hap);
}
}
if (fieldValues.containsKey(NANO_OF_DAY)) {
long nod = fieldValues.remove(NANO_OF_DAY);
if (resolverStyle != ResolverStyle.LENIENT) {
NANO_OF_DAY.checkValidValue(nod);
}
updateCheckConflict(NANO_OF_DAY, HOUR_OF_DAY, nod / 3600_000_000_000L);
updateCheckConflict(NANO_OF_DAY, MINUTE_OF_HOUR, (nod / 60_000_000_000L) % 60);
updateCheckConflict(NANO_OF_DAY, SECOND_OF_MINUTE, (nod / 1_000_000_000L) % 60);
updateCheckConflict(NANO_OF_DAY, NANO_OF_SECOND, nod % 1_000_000_000L);
}
if (fieldValues.containsKey(MICRO_OF_DAY)) {
long cod = fieldValues.remove(MICRO_OF_DAY);
if (resolverStyle != ResolverStyle.LENIENT) {
MICRO_OF_DAY.checkValidValue(cod);
}
updateCheckConflict(MICRO_OF_DAY, SECOND_OF_DAY, cod / 1_000_000L);
updateCheckConflict(MICRO_OF_DAY, MICRO_OF_SECOND, cod % 1_000_000L);
}
if (fieldValues.containsKey(MILLI_OF_DAY)) {
long lod = fieldValues.remove(MILLI_OF_DAY);
if (resolverStyle != ResolverStyle.LENIENT) {
MILLI_OF_DAY.checkValidValue(lod);
}
updateCheckConflict(MILLI_OF_DAY, SECOND_OF_DAY, lod / 1_000);
updateCheckConflict(MILLI_OF_DAY, MILLI_OF_SECOND, lod % 1_000);
}
if (fieldValues.containsKey(SECOND_OF_DAY)) {
long sod = fieldValues.remove(SECOND_OF_DAY);
if (resolverStyle != ResolverStyle.LENIENT) {
SECOND_OF_DAY.checkValidValue(sod);
}
updateCheckConflict(SECOND_OF_DAY, HOUR_OF_DAY, sod / 3600);
updateCheckConflict(SECOND_OF_DAY, MINUTE_OF_HOUR, (sod / 60) % 60);
updateCheckConflict(SECOND_OF_DAY, SECOND_OF_MINUTE, sod % 60);
}
if (fieldValues.containsKey(MINUTE_OF_DAY)) {
long mod = fieldValues.remove(MINUTE_OF_DAY);
if (resolverStyle != ResolverStyle.LENIENT) {
MINUTE_OF_DAY.checkValidValue(mod);
}
updateCheckConflict(MINUTE_OF_DAY, HOUR_OF_DAY, mod / 60);
updateCheckConflict(MINUTE_OF_DAY, MINUTE_OF_HOUR, mod % 60);
}
// combine partial second fields strictly, leaving lenient expansion to later
if (fieldValues.containsKey(NANO_OF_SECOND)) {
long nos = fieldValues.get(NANO_OF_SECOND);
if (resolverStyle != ResolverStyle.LENIENT) {
NANO_OF_SECOND.checkValidValue(nos);
}
if (fieldValues.containsKey(MICRO_OF_SECOND)) {
long cos = fieldValues.remove(MICRO_OF_SECOND);
if (resolverStyle != ResolverStyle.LENIENT) {
MICRO_OF_SECOND.checkValidValue(cos);
}
nos = cos * 1000 + (nos % 1000);
updateCheckConflict(MICRO_OF_SECOND, NANO_OF_SECOND, nos);
}
if (fieldValues.containsKey(MILLI_OF_SECOND)) {
long los = fieldValues.remove(MILLI_OF_SECOND);
if (resolverStyle != ResolverStyle.LENIENT) {
MILLI_OF_SECOND.checkValidValue(los);
}
updateCheckConflict(MILLI_OF_SECOND, NANO_OF_SECOND, los * 1_000_000L + (nos % 1_000_000L));
}
}
// convert to time if all four fields available (optimization)
if (fieldValues.containsKey(HOUR_OF_DAY) && fieldValues.containsKey(MINUTE_OF_HOUR) &&
fieldValues.containsKey(SECOND_OF_MINUTE) && fieldValues.containsKey(NANO_OF_SECOND)) {
long hod = fieldValues.remove(HOUR_OF_DAY);
long moh = fieldValues.remove(MINUTE_OF_HOUR);
long som = fieldValues.remove(SECOND_OF_MINUTE);
long nos = fieldValues.remove(NANO_OF_SECOND);
resolveTime(hod, moh, som, nos);
}
}
private void resolveTimeLenient() {
// leniently create a time from incomplete information
// done after everything else as it creates information from nothing
// which would break updateCheckConflict(field)
if (time == null) {
// NANO_OF_SECOND merged with MILLI/MICRO above
if (fieldValues.containsKey(MILLI_OF_SECOND)) {
long los = fieldValues.remove(MILLI_OF_SECOND);
if (fieldValues.containsKey(MICRO_OF_SECOND)) {
// merge milli-of-second and micro-of-second for better error message
long cos = los * 1_000 + (fieldValues.get(MICRO_OF_SECOND) % 1_000);
updateCheckConflict(MILLI_OF_SECOND, MICRO_OF_SECOND, cos);
fieldValues.remove(MICRO_OF_SECOND);
fieldValues.put(NANO_OF_SECOND, cos * 1_000L);
} else {
// convert milli-of-second to nano-of-second
fieldValues.put(NANO_OF_SECOND, los * 1_000_000L);
}
} else if (fieldValues.containsKey(MICRO_OF_SECOND)) {
// convert micro-of-second to nano-of-second
long cos = fieldValues.remove(MICRO_OF_SECOND);
fieldValues.put(NANO_OF_SECOND, cos * 1_000L);
}
// merge hour/minute/second/nano leniently
Long hod = fieldValues.get(HOUR_OF_DAY);
if (hod != null) {
Long moh = fieldValues.get(MINUTE_OF_HOUR);
Long som = fieldValues.get(SECOND_OF_MINUTE);
Long nos = fieldValues.get(NANO_OF_SECOND);
// check for invalid combinations that cannot be defaulted
if ((moh == null && (som != null || nos != null)) ||
(moh != null && som == null && nos != null)) {
return;
}
// default as necessary and build time
long mohVal = (moh != null ? moh : 0);
long somVal = (som != null ? som : 0);
long nosVal = (nos != null ? nos : 0);
resolveTime(hod, mohVal, somVal, nosVal);
fieldValues.remove(HOUR_OF_DAY);
fieldValues.remove(MINUTE_OF_HOUR);
fieldValues.remove(SECOND_OF_MINUTE);
fieldValues.remove(NANO_OF_SECOND);
}
}
// validate remaining
if (resolverStyle != ResolverStyle.LENIENT && fieldValues.size() > 0) {
for (Entry<TemporalField, Long> entry : fieldValues.entrySet()) {
TemporalField field = entry.getKey();
if (field instanceof ChronoField && field.isTimeBased()) {
((ChronoField) field).checkValidValue(entry.getValue());
}
}
}
}
private void resolveTime(long hod, long moh, long som, long nos) {
if (resolverStyle == ResolverStyle.LENIENT) {
long totalNanos = Math.multiplyExact(hod, 3600_000_000_000L);
totalNanos = Math.addExact(totalNanos, Math.multiplyExact(moh, 60_000_000_000L));
totalNanos = Math.addExact(totalNanos, Math.multiplyExact(som, 1_000_000_000L));
totalNanos = Math.addExact(totalNanos, nos);
int excessDays = (int) Math.floorDiv(totalNanos, 86400_000_000_000L); // safe int cast
long nod = Math.floorMod(totalNanos, 86400_000_000_000L);
updateCheckConflict(LocalTime.ofNanoOfDay(nod), Period.ofDays(excessDays));
} else { // STRICT or SMART
int mohVal = MINUTE_OF_HOUR.checkValidIntValue(moh);
int nosVal = NANO_OF_SECOND.checkValidIntValue(nos);
// handle 24:00 end of day
if (resolverStyle == ResolverStyle.SMART && hod == 24 && mohVal == 0 && som == 0 && nosVal == 0) {
updateCheckConflict(LocalTime.MIDNIGHT, Period.ofDays(1));
} else {
int hodVal = HOUR_OF_DAY.checkValidIntValue(hod);
int somVal = SECOND_OF_MINUTE.checkValidIntValue(som);
updateCheckConflict(LocalTime.of(hodVal, mohVal, somVal, nosVal), Period.ZERO);
}
}
}
private void resolvePeriod() {
// add whole days if we have both date and time
if (date != null && time != null && excessDays.isZero() == false) {
date = date.plus(excessDays);
excessDays = Period.ZERO;
}
}
private void updateCheckConflict(LocalTime timeToSet, Period periodToSet) {
if (time != null) {
if (time.equals(timeToSet) == false) {
throw new DateTimeException("Conflict found: Fields resolved to different times: " + time + " " + timeToSet);
}
if (excessDays.isZero() == false && periodToSet.isZero() == false && excessDays.equals(periodToSet) == false) {
throw new DateTimeException("Conflict found: Fields resolved to different excess periods: " + excessDays + " " + periodToSet);
} else {
excessDays = periodToSet;
}
} else {
time = timeToSet;
excessDays = periodToSet;
}
}
//-----------------------------------------------------------------------
private void crossCheck() {
// only cross-check date, time and date-time
// avoid object creation if possible
if (date != null) {
crossCheck(date);
}
if (time != null) {
crossCheck(time);
if (date != null && fieldValues.size() > 0) {
crossCheck(date.atTime(time));
}
}
}
private void crossCheck(TemporalAccessor target) {
for (Iterator<Entry it = fieldValues.entrySet().iterator(); it.hasNext(); ) {
Entry<TemporalField, Long> entry = it.next();
TemporalField field = entry.getKey();
long val1;
try {
val1 = target.getLong(field);
} catch (RuntimeException ex) {
continue;
}
long val2 = entry.getValue();
if (val1 != val2) {
throw new DateTimeException("Conflict found: Field " + field + " " + val1 +
" differs from " + field + " " + val2 + " derived from " + target);
}
it.remove();
}
}
//-----------------------------------------------------------------------
@Override
public String toString() {
StringBuilder buf = new StringBuilder(64);
buf.append(fieldValues).append(',').append(chrono);
if (zone != null) {
buf.append(',').append(zone);
}
if (date != null || time != null) {
buf.append(" resolved to ");
if (date != null) {
buf.append(date);
if (time != null) {
buf.append('T').append(time);
}
} else {
buf.append(time);
}
}
return buf.toString();
}
}
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