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/*
 *  Copyright 2001-2014 Stephen Colebourne
 *
 *  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 org.joda.time.format;

import java.io.IOException;
import java.io.Writer;
import java.util.Locale;

import org.joda.time.Chronology;
import org.joda.time.DateTime;
import org.joda.time.DateTimeUtils;
import org.joda.time.DateTimeZone;
import org.joda.time.LocalDate;
import org.joda.time.LocalDateTime;
import org.joda.time.LocalTime;
import org.joda.time.MutableDateTime;
import org.joda.time.ReadWritableInstant;
import org.joda.time.ReadableInstant;
import org.joda.time.ReadablePartial;

/**
 * Controls the printing and parsing of a datetime to and from a string.
 * 

* This class is the main API for printing and parsing used by most applications. * Instances of this class are created via one of three factory classes: *

    *
  • {@link DateTimeFormat} - formats by pattern and style
  • *
  • {@link ISODateTimeFormat} - ISO8601 formats
  • *
  • {@link DateTimeFormatterBuilder} - complex formats created via method calls
  • *
*

* An instance of this class holds a reference internally to one printer and * one parser. It is possible that one of these may be null, in which case the * formatter cannot print/parse. This can be checked via the {@link #isPrinter()} * and {@link #isParser()} methods. *

* The underlying printer/parser can be altered to behave exactly as required * by using one of the decorator modifiers: *

    *
  • {@link #withLocale(Locale)} - returns a new formatter that uses the specified locale
  • *
  • {@link #withZone(DateTimeZone)} - returns a new formatter that uses the specified time zone
  • *
  • {@link #withChronology(Chronology)} - returns a new formatter that uses the specified chronology
  • *
  • {@link #withOffsetParsed()} - returns a new formatter that returns the parsed time zone offset
  • *
  • {@link #withPivotYear(int)} - returns a new formatter with the specified pivot year
  • *
  • {@link #withDefaultYear(int)} - returns a new formatter with the specified default year
  • *
* Each of these returns a new formatter (instances of this class are immutable). *

* The main methods of the class are the printXxx and * parseXxx methods. These are used as follows: *

 * // print using the defaults (default locale, chronology/zone of the datetime)
 * String dateStr = formatter.print(dt);
 * // print using the French locale
 * String dateStr = formatter.withLocale(Locale.FRENCH).print(dt);
 * // print using the UTC zone
 * String dateStr = formatter.withZone(DateTimeZone.UTC).print(dt);
 * 
 * // parse using the Paris zone
 * DateTime date = formatter.withZone(DateTimeZone.forID("Europe/Paris")).parseDateTime(str);
 * 
*

* Parsing builds up the resultant instant by 'setting' the value of each parsed field * from largest to smallest onto an initial instant, typically 1970-01-01T00:00Z. * This design means that day-of-month is set before day-of-week. * As such, if both the day-of-month and day-of-week are parsed, and the day-of-week * is incorrect, then the day-of-week overrides the day-of-month. * * This has a side effect if the input is not consistent. * * * @author Brian S O'Neill * @author Stephen Colebourne * @author Fredrik Borgh * @since 1.0 */ public class DateTimeFormatter { /** The internal printer used to output the datetime. */ private final InternalPrinter iPrinter; /** The internal parser used to output the datetime. */ private final InternalParser iParser; /** The locale to use for printing and parsing. */ private final Locale iLocale; /** Whether the offset is parsed. */ private final boolean iOffsetParsed; /** The chronology to use as an override. */ private final Chronology iChrono; /** The zone to use as an override. */ private final DateTimeZone iZone; /** The pivot year to use for two-digit year parsing. */ private final Integer iPivotYear; /** The default year for parsing month/day without year. */ private final int iDefaultYear; /** * Creates a new formatter, however you will normally use the factory * or the builder. * * @param printer the internal printer, null if cannot print * @param parser the internal parser, null if cannot parse */ public DateTimeFormatter( DateTimePrinter printer, DateTimeParser parser) { this(DateTimePrinterInternalPrinter.of(printer), DateTimeParserInternalParser.of(parser)); } /** * Creates a new formatter, however you will normally use the factory * or the builder. * * @param printer the internal printer, null if cannot print * @param parser the internal parser, null if cannot parse */ DateTimeFormatter( InternalPrinter printer, InternalParser parser) { super(); iPrinter = printer; iParser = parser; iLocale = null; iOffsetParsed = false; iChrono = null; iZone = null; iPivotYear = null; iDefaultYear = 2000; } /** * Constructor. */ private DateTimeFormatter( InternalPrinter printer, InternalParser parser, Locale locale, boolean offsetParsed, Chronology chrono, DateTimeZone zone, Integer pivotYear, int defaultYear) { super(); iPrinter = printer; iParser = parser; iLocale = locale; iOffsetParsed = offsetParsed; iChrono = chrono; iZone = zone; iPivotYear = pivotYear; iDefaultYear = defaultYear; } //----------------------------------------------------------------------- /** * Is this formatter capable of printing. * * @return true if this is a printer */ public boolean isPrinter() { return (iPrinter != null); } /** * Gets the internal printer object that performs the real printing work. * * @return the internal printer; is null if printing not supported */ public DateTimePrinter getPrinter() { return InternalPrinterDateTimePrinter.of(iPrinter); } /** * Gets the internal printer object that performs the real printing work. * * @return the internal printer; is null if printing not supported */ InternalPrinter getPrinter0() { return iPrinter; } /** * Is this formatter capable of parsing. * * @return true if this is a parser */ public boolean isParser() { return (iParser != null); } /** * Gets the internal parser object that performs the real parsing work. * * @return the internal parser; is null if parsing not supported */ public DateTimeParser getParser() { return InternalParserDateTimeParser.of(iParser); } InternalParser getParser0() { return iParser; } //----------------------------------------------------------------------- /** * Returns a new formatter with a different locale that will be used * for printing and parsing. *

* A DateTimeFormatter is immutable, so a new instance is returned, * and the original is unaltered and still usable. * * @param locale the locale to use; if null, formatter uses default locale * at invocation time * @return the new formatter */ public DateTimeFormatter withLocale(Locale locale) { if (locale == getLocale() || (locale != null && locale.equals(getLocale()))) { return this; } return new DateTimeFormatter(iPrinter, iParser, locale, iOffsetParsed, iChrono, iZone, iPivotYear, iDefaultYear); } /** * Gets the locale that will be used for printing and parsing. * * @return the locale to use; if null, formatter uses default locale at * invocation time */ public Locale getLocale() { return iLocale; } //----------------------------------------------------------------------- /** * Returns a new formatter that will create a datetime with a time zone * equal to that of the offset of the parsed string. *

* After calling this method, a string '2004-06-09T10:20:30-08:00' will * create a datetime with a zone of -08:00 (a fixed zone, with no daylight * savings rules). If the parsed string represents a local time (no zone * offset) the parsed datetime will be in the default zone. *

* Calling this method sets the override zone to null. * Calling the override zone method sets this flag off. * * @return the new formatter */ public DateTimeFormatter withOffsetParsed() { if (iOffsetParsed == true) { return this; } return new DateTimeFormatter(iPrinter, iParser, iLocale, true, iChrono, null, iPivotYear, iDefaultYear); } /** * Checks whether the offset from the string is used as the zone of * the parsed datetime. * * @return true if the offset from the string is used as the zone */ public boolean isOffsetParsed() { return iOffsetParsed; } //----------------------------------------------------------------------- /** * Returns a new formatter that will use the specified chronology in * preference to that of the printed object, or ISO on a parse. *

* When printing, this chronology will be used in preference to the chronology * from the datetime that would otherwise be used. *

* When parsing, this chronology will be set on the parsed datetime. *

* A null chronology means no-override. * If both an override chronology and an override zone are set, the * override zone will take precedence over the zone in the chronology. * * @param chrono the chronology to use as an override * @return the new formatter */ public DateTimeFormatter withChronology(Chronology chrono) { if (iChrono == chrono) { return this; } return new DateTimeFormatter(iPrinter, iParser, iLocale, iOffsetParsed, chrono, iZone, iPivotYear, iDefaultYear); } /** * Gets the chronology to use as an override. * * @return the chronology to use as an override */ public Chronology getChronology() { return iChrono; } /** * Gets the chronology to use as an override. * * @return the chronology to use as an override * @deprecated Use the method with the correct spelling */ @Deprecated public Chronology getChronolgy() { return iChrono; } //----------------------------------------------------------------------- /** * Returns a new formatter that will use the UTC zone in preference * to the zone of the printed object, or default zone on a parse. *

* When printing, UTC will be used in preference to the zone * from the datetime that would otherwise be used. *

* When parsing, UTC will be set on the parsed datetime. *

* If both an override chronology and an override zone are set, the * override zone will take precedence over the zone in the chronology. * * @return the new formatter, never null * @since 2.0 */ public DateTimeFormatter withZoneUTC() { return withZone(DateTimeZone.UTC); } /** * Returns a new formatter that will use the specified zone in preference * to the zone of the printed object, or default zone on a parse. *

* When printing, this zone will be used in preference to the zone * from the datetime that would otherwise be used. *

* When parsing, this zone will be set on the parsed datetime. *

* A null zone means of no-override. * If both an override chronology and an override zone are set, the * override zone will take precedence over the zone in the chronology. * * @param zone the zone to use as an override * @return the new formatter */ public DateTimeFormatter withZone(DateTimeZone zone) { if (iZone == zone) { return this; } return new DateTimeFormatter(iPrinter, iParser, iLocale, false, iChrono, zone, iPivotYear, iDefaultYear); } /** * Gets the zone to use as an override. * * @return the zone to use as an override */ public DateTimeZone getZone() { return iZone; } //----------------------------------------------------------------------- /** * Returns a new formatter that will use the specified pivot year for two * digit year parsing in preference to that stored in the parser. *

* This setting is useful for changing the pivot year of formats built * using a pattern - {@link DateTimeFormat#forPattern(String)}. *

* When parsing, this pivot year is used. Null means no-override. * There is no effect when printing. *

* The pivot year enables a two digit year to be converted to a four * digit year. The pivot represents the year in the middle of the * supported range of years. Thus the full range of years that will * be built is (pivot - 50) .. (pivot + 49). * *

     * pivot   supported range   00 is   20 is   40 is   60 is   80 is
     * ---------------------------------------------------------------
     * 1950      1900..1999      1900    1920    1940    1960    1980
     * 1975      1925..2024      2000    2020    1940    1960    1980
     * 2000      1950..2049      2000    2020    2040    1960    1980
     * 2025      1975..2074      2000    2020    2040    2060    1980
     * 2050      2000..2099      2000    2020    2040    2060    2080
     * 
* * @param pivotYear the pivot year to use as an override when parsing * @return the new formatter * @since 1.1 */ public DateTimeFormatter withPivotYear(Integer pivotYear) { if (iPivotYear == pivotYear || (iPivotYear != null && iPivotYear.equals(pivotYear))) { return this; } return new DateTimeFormatter(iPrinter, iParser, iLocale, iOffsetParsed, iChrono, iZone, pivotYear, iDefaultYear); } /** * Returns a new formatter that will use the specified pivot year for two * digit year parsing in preference to that stored in the parser. *

* This setting is useful for changing the pivot year of formats built * using a pattern - {@link DateTimeFormat#forPattern(String)}. *

* When parsing, this pivot year is used. * There is no effect when printing. *

* The pivot year enables a two digit year to be converted to a four * digit year. The pivot represents the year in the middle of the * supported range of years. Thus the full range of years that will * be built is (pivot - 50) .. (pivot + 49). * *

     * pivot   supported range   00 is   20 is   40 is   60 is   80 is
     * ---------------------------------------------------------------
     * 1950      1900..1999      1900    1920    1940    1960    1980
     * 1975      1925..2024      2000    2020    1940    1960    1980
     * 2000      1950..2049      2000    2020    2040    1960    1980
     * 2025      1975..2074      2000    2020    2040    2060    1980
     * 2050      2000..2099      2000    2020    2040    2060    2080
     * 
* * @param pivotYear the pivot year to use as an override when parsing * @return the new formatter * @since 1.1 */ public DateTimeFormatter withPivotYear(int pivotYear) { return withPivotYear(Integer.valueOf(pivotYear)); } /** * Gets the pivot year to use as an override. * * @return the pivot year to use as an override * @since 1.1 */ public Integer getPivotYear() { return iPivotYear; } //----------------------------------------------------------------------- /** * Returns a new formatter that will use the specified default year. *

* The default year is used when parsing in the case where there is a * month or a day but not a year. Specifically, it is used if there is * a field parsed with a duration between the length of a month and the * length of a day inclusive. *

* This value is typically used to move the year from 1970 to a leap year * to enable February 29th to be parsed. * Unless customised, the year 2000 is used. *

* This setting has no effect when printing. * * @param defaultYear the default year to use * @return the new formatter, not null * @since 2.0 */ public DateTimeFormatter withDefaultYear(int defaultYear) { return new DateTimeFormatter(iPrinter, iParser, iLocale, iOffsetParsed, iChrono, iZone, iPivotYear, defaultYear); } /** * Gets the default year for parsing months and days. * * @return the default year for parsing months and days * @since 2.0 */ public int getDefaultYear() { return iDefaultYear; } //----------------------------------------------------------------------- /** * Prints a ReadableInstant, using the chronology supplied by the instant. * * @param buf the destination to format to, not null * @param instant instant to format, null means now */ public void printTo(StringBuffer buf, ReadableInstant instant) { try { printTo((Appendable) buf, instant); } catch (IOException ex) { // StringBuffer does not throw IOException } } /** * Prints a ReadableInstant, using the chronology supplied by the instant. * * @param buf the destination to format to, not null * @param instant instant to format, null means now */ public void printTo(StringBuilder buf, ReadableInstant instant) { try { printTo((Appendable) buf, instant); } catch (IOException ex) { // StringBuilder does not throw IOException } } /** * Prints a ReadableInstant, using the chronology supplied by the instant. * * @param out the destination to format to, not null * @param instant instant to format, null means now */ public void printTo(Writer out, ReadableInstant instant) throws IOException { printTo((Appendable) out, instant); } /** * Prints a ReadableInstant, using the chronology supplied by the instant. * * @param appendable the destination to format to, not null * @param instant instant to format, null means now * @since 2.0 */ public void printTo(Appendable appendable, ReadableInstant instant) throws IOException { long millis = DateTimeUtils.getInstantMillis(instant); Chronology chrono = DateTimeUtils.getInstantChronology(instant); printTo(appendable, millis, chrono); } //----------------------------------------------------------------------- /** * Prints an instant from milliseconds since 1970-01-01T00:00:00Z, * using ISO chronology in the default DateTimeZone. * * @param buf the destination to format to, not null * @param instant millis since 1970-01-01T00:00:00Z */ public void printTo(StringBuffer buf, long instant) { try { printTo((Appendable) buf, instant); } catch (IOException ex) { // StringBuffer does not throw IOException } } /** * Prints an instant from milliseconds since 1970-01-01T00:00:00Z, * using ISO chronology in the default DateTimeZone. * * @param buf the destination to format to, not null * @param instant millis since 1970-01-01T00:00:00Z */ public void printTo(StringBuilder buf, long instant) { try { printTo((Appendable) buf, instant); } catch (IOException ex) { // StringBuilder does not throw IOException } } /** * Prints an instant from milliseconds since 1970-01-01T00:00:00Z, * using ISO chronology in the default DateTimeZone. * * @param out the destination to format to, not null * @param instant millis since 1970-01-01T00:00:00Z */ public void printTo(Writer out, long instant) throws IOException { printTo((Appendable) out, instant); } /** * Prints an instant from milliseconds since 1970-01-01T00:00:00Z, * using ISO chronology in the default DateTimeZone. * * @param appendable the destination to format to, not null * @param instant millis since 1970-01-01T00:00:00Z * @since 2.0 */ public void printTo(Appendable appendable, long instant) throws IOException { printTo(appendable, instant, null); } //----------------------------------------------------------------------- /** * Prints a ReadablePartial. *

* Neither the override chronology nor the override zone are used * by this method. * * @param buf the destination to format to, not null * @param partial partial to format */ public void printTo(StringBuffer buf, ReadablePartial partial) { try { printTo((Appendable) buf, partial); } catch (IOException ex) { // StringBuffer does not throw IOException } } /** * Prints a ReadablePartial. *

* Neither the override chronology nor the override zone are used * by this method. * * @param buf the destination to format to, not null * @param partial partial to format */ public void printTo(StringBuilder buf, ReadablePartial partial) { try { printTo((Appendable) buf, partial); } catch (IOException ex) { // StringBuilder does not throw IOException } } /** * Prints a ReadablePartial. *

* Neither the override chronology nor the override zone are used * by this method. * * @param out the destination to format to, not null * @param partial partial to format */ public void printTo(Writer out, ReadablePartial partial) throws IOException { printTo((Appendable) out, partial); } /** * Prints a ReadablePartial. *

* Neither the override chronology nor the override zone are used * by this method. * * @param appendable the destination to format to, not null * @param partial partial to format * @since 2.0 */ public void printTo(Appendable appendable, ReadablePartial partial) throws IOException { InternalPrinter printer = requirePrinter(); if (partial == null) { throw new IllegalArgumentException("The partial must not be null"); } printer.printTo(appendable, partial, iLocale); } //----------------------------------------------------------------------- /** * Prints a ReadableInstant to a String. *

* This method will use the override zone and the override chronology if * they are set. Otherwise it will use the chronology and zone of the instant. * * @param instant instant to format, null means now * @return the printed result */ public String print(ReadableInstant instant) { StringBuilder buf = new StringBuilder(requirePrinter().estimatePrintedLength()); try { printTo((Appendable) buf, instant); } catch (IOException ex) { // StringBuilder does not throw IOException } return buf.toString(); } /** * Prints a millisecond instant to a String. *

* This method will use the override zone and the override chronology if * they are set. Otherwise it will use the ISO chronology and default zone. * * @param instant millis since 1970-01-01T00:00:00Z * @return the printed result */ public String print(long instant) { StringBuilder buf = new StringBuilder(requirePrinter().estimatePrintedLength()); try { printTo((Appendable) buf, instant); } catch (IOException ex) { // StringBuilder does not throw IOException } return buf.toString(); } /** * Prints a ReadablePartial to a new String. *

* Neither the override chronology nor the override zone are used * by this method. * * @param partial partial to format * @return the printed result */ public String print(ReadablePartial partial) { StringBuilder buf = new StringBuilder(requirePrinter().estimatePrintedLength()); try { printTo((Appendable) buf, partial); } catch (IOException ex) { // StringBuilder does not throw IOException } return buf.toString(); } private void printTo(Appendable appendable, long instant, Chronology chrono) throws IOException { InternalPrinter printer = requirePrinter(); chrono = selectChronology(chrono); // Shift instant into local time (UTC) to avoid excessive offset // calculations when printing multiple fields in a composite printer. DateTimeZone zone = chrono.getZone(); int offset = zone.getOffset(instant); long adjustedInstant = instant + offset; if ((instant ^ adjustedInstant) < 0 && (instant ^ offset) >= 0) { // Time zone offset overflow, so revert to UTC. zone = DateTimeZone.UTC; offset = 0; adjustedInstant = instant; } printer.printTo(appendable, adjustedInstant, chrono.withUTC(), offset, zone, iLocale); } /** * Checks whether printing is supported. * * @throws UnsupportedOperationException if printing is not supported */ private InternalPrinter requirePrinter() { InternalPrinter printer = iPrinter; if (printer == null) { throw new UnsupportedOperationException("Printing not supported"); } return printer; } //----------------------------------------------------------------------- /** * Parses a datetime from the given text, at the given position, saving the * result into the fields of the given ReadWritableInstant. If the parse * succeeds, the return value is the new text position. Note that the parse * may succeed without fully reading the text and in this case those fields * that were read will be set. *

* Only those fields present in the string will be changed in the specified * instant. All other fields will remain unaltered. Thus if the string only * contains a year and a month, then the day and time will be retained from * the input instant. If this is not the behaviour you want, then reset the * fields before calling this method, or use {@link #parseDateTime(String)} * or {@link #parseMutableDateTime(String)}. *

* If it fails, the return value is negative, but the instant may still be * modified. To determine the position where the parse failed, apply the * one's complement operator (~) on the return value. *

* This parse method ignores the {@link #getDefaultYear() default year} and * parses using the year from the supplied instant based on the chronology * and time-zone of the supplied instant. *

* The parse will use the chronology of the instant. * * @param instant an instant that will be modified, not null * @param text the text to parse * @param position position to start parsing from * @return new position, negative value means parse failed - * apply complement operator (~) to get position of failure * @throws UnsupportedOperationException if parsing is not supported * @throws IllegalArgumentException if the instant is null * @throws IllegalArgumentException if any field is out of range */ public int parseInto(ReadWritableInstant instant, String text, int position) { InternalParser parser = requireParser(); if (instant == null) { throw new IllegalArgumentException("Instant must not be null"); } long instantMillis = instant.getMillis(); Chronology chrono = instant.getChronology(); int defaultYear = DateTimeUtils.getChronology(chrono).year().get(instantMillis); long instantLocal = instantMillis + chrono.getZone().getOffset(instantMillis); chrono = selectChronology(chrono); DateTimeParserBucket bucket = new DateTimeParserBucket( instantLocal, chrono, iLocale, iPivotYear, defaultYear); int newPos = parser.parseInto(bucket, text, position); instant.setMillis(bucket.computeMillis(false, text)); if (iOffsetParsed && bucket.getOffsetInteger() != null) { int parsedOffset = bucket.getOffsetInteger(); DateTimeZone parsedZone = DateTimeZone.forOffsetMillis(parsedOffset); chrono = chrono.withZone(parsedZone); } else if (bucket.getZone() != null) { chrono = chrono.withZone(bucket.getZone()); } instant.setChronology(chrono); if (iZone != null) { instant.setZone(iZone); } return newPos; } /** * Parses a datetime from the given text, returning the number of * milliseconds since the epoch, 1970-01-01T00:00:00Z. *

* The parse will use the ISO chronology, and the default time zone. * If the text contains a time zone string then that will be taken into account. * * @param text the text to parse, not null * @return parsed value expressed in milliseconds since the epoch * @throws UnsupportedOperationException if parsing is not supported * @throws IllegalArgumentException if the text to parse is invalid */ public long parseMillis(String text) { InternalParser parser = requireParser(); Chronology chrono = selectChronology(iChrono); DateTimeParserBucket bucket = new DateTimeParserBucket(0, chrono, iLocale, iPivotYear, iDefaultYear); return bucket.doParseMillis(parser, text); } /** * Parses only the local date from the given text, returning a new LocalDate. *

* This will parse the text fully according to the formatter, using the UTC zone. * Once parsed, only the local date will be used. * This means that any parsed time, time-zone or offset field is completely ignored. * It also means that the zone and offset-parsed settings are ignored. * * @param text the text to parse, not null * @return the parsed date, never null * @throws UnsupportedOperationException if parsing is not supported * @throws IllegalArgumentException if the text to parse is invalid * @since 2.0 */ public LocalDate parseLocalDate(String text) { return parseLocalDateTime(text).toLocalDate(); } /** * Parses only the local time from the given text, returning a new LocalTime. *

* This will parse the text fully according to the formatter, using the UTC zone. * Once parsed, only the local time will be used. * This means that any parsed date, time-zone or offset field is completely ignored. * It also means that the zone and offset-parsed settings are ignored. * * @param text the text to parse, not null * @return the parsed time, never null * @throws UnsupportedOperationException if parsing is not supported * @throws IllegalArgumentException if the text to parse is invalid * @since 2.0 */ public LocalTime parseLocalTime(String text) { return parseLocalDateTime(text).toLocalTime(); } /** * Parses only the local date-time from the given text, returning a new LocalDateTime. *

* This will parse the text fully according to the formatter, using the UTC zone. * Once parsed, only the local date-time will be used. * This means that any parsed time-zone or offset field is completely ignored. * It also means that the zone and offset-parsed settings are ignored. * * @param text the text to parse, not null * @return the parsed date-time, never null * @throws UnsupportedOperationException if parsing is not supported * @throws IllegalArgumentException if the text to parse is invalid * @since 2.0 */ public LocalDateTime parseLocalDateTime(String text) { InternalParser parser = requireParser(); Chronology chrono = selectChronology(null).withUTC(); // always use UTC, avoiding DST gaps DateTimeParserBucket bucket = new DateTimeParserBucket(0, chrono, iLocale, iPivotYear, iDefaultYear); int newPos = parser.parseInto(bucket, text, 0); if (newPos >= 0) { if (newPos >= text.length()) { long millis = bucket.computeMillis(true, text); if (bucket.getOffsetInteger() != null) { // treat withOffsetParsed() as being true int parsedOffset = bucket.getOffsetInteger(); DateTimeZone parsedZone = DateTimeZone.forOffsetMillis(parsedOffset); chrono = chrono.withZone(parsedZone); } else if (bucket.getZone() != null) { chrono = chrono.withZone(bucket.getZone()); } return new LocalDateTime(millis, chrono); } } else { newPos = ~newPos; } throw new IllegalArgumentException(FormatUtils.createErrorMessage(text, newPos)); } /** * Parses a date-time from the given text, returning a new DateTime. *

* The parse will use the zone and chronology specified on this formatter. *

* If the text contains a time zone string then that will be taken into * account in adjusting the time of day as follows. * If the {@link #withOffsetParsed()} has been called, then the resulting * DateTime will have a fixed offset based on the parsed time zone. * Otherwise the resulting DateTime will have the zone of this formatter, * but the parsed zone may have caused the time to be adjusted. * * @param text the text to parse, not null * @return the parsed date-time, never null * @throws UnsupportedOperationException if parsing is not supported * @throws IllegalArgumentException if the text to parse is invalid */ public DateTime parseDateTime(String text) { InternalParser parser = requireParser(); Chronology chrono = selectChronology(null); DateTimeParserBucket bucket = new DateTimeParserBucket(0, chrono, iLocale, iPivotYear, iDefaultYear); int newPos = parser.parseInto(bucket, text, 0); if (newPos >= 0) { if (newPos >= text.length()) { long millis = bucket.computeMillis(true, text); if (iOffsetParsed && bucket.getOffsetInteger() != null) { int parsedOffset = bucket.getOffsetInteger(); DateTimeZone parsedZone = DateTimeZone.forOffsetMillis(parsedOffset); chrono = chrono.withZone(parsedZone); } else if (bucket.getZone() != null) { chrono = chrono.withZone(bucket.getZone()); } DateTime dt = new DateTime(millis, chrono); if (iZone != null) { dt = dt.withZone(iZone); } return dt; } } else { newPos = ~newPos; } throw new IllegalArgumentException(FormatUtils.createErrorMessage(text, newPos)); } /** * Parses a date-time from the given text, returning a new MutableDateTime. *

* The parse will use the zone and chronology specified on this formatter. *

* If the text contains a time zone string then that will be taken into * account in adjusting the time of day as follows. * If the {@link #withOffsetParsed()} has been called, then the resulting * DateTime will have a fixed offset based on the parsed time zone. * Otherwise the resulting DateTime will have the zone of this formatter, * but the parsed zone may have caused the time to be adjusted. * * @param text the text to parse, not null * @return the parsed date-time, never null * @throws UnsupportedOperationException if parsing is not supported * @throws IllegalArgumentException if the text to parse is invalid */ public MutableDateTime parseMutableDateTime(String text) { InternalParser parser = requireParser(); Chronology chrono = selectChronology(null); DateTimeParserBucket bucket = new DateTimeParserBucket(0, chrono, iLocale, iPivotYear, iDefaultYear); int newPos = parser.parseInto(bucket, text, 0); if (newPos >= 0) { if (newPos >= text.length()) { long millis = bucket.computeMillis(true, text); if (iOffsetParsed && bucket.getOffsetInteger() != null) { int parsedOffset = bucket.getOffsetInteger(); DateTimeZone parsedZone = DateTimeZone.forOffsetMillis(parsedOffset); chrono = chrono.withZone(parsedZone); } else if (bucket.getZone() != null) { chrono = chrono.withZone(bucket.getZone()); } MutableDateTime dt = new MutableDateTime(millis, chrono); if (iZone != null) { dt.setZone(iZone); } return dt; } } else { newPos = ~newPos; } throw new IllegalArgumentException(FormatUtils.createErrorMessage(text, newPos)); } /** * Checks whether parsing is supported. * * @throws UnsupportedOperationException if parsing is not supported */ private InternalParser requireParser() { InternalParser parser = iParser; if (parser == null) { throw new UnsupportedOperationException("Parsing not supported"); } return parser; } //----------------------------------------------------------------------- /** * Determines the correct chronology to use. * * @param chrono the proposed chronology * @return the actual chronology */ private Chronology selectChronology(Chronology chrono) { chrono = DateTimeUtils.getChronology(chrono); if (iChrono != null) { chrono = iChrono; } if (iZone != null) { chrono = chrono.withZone(iZone); } return chrono; } }





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