Java example source code file (DateTimeFormatter.java)
The DateTimeFormatter.java Java example source code/*
* 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.
* <p>
* 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:
* <ul>
* <li>{@link DateTimeFormat} - formats by pattern and style
* <li>{@link ISODateTimeFormat} - ISO8601 formats
* <li>{@link DateTimeFormatterBuilder} - complex formats created via method calls
* </ul>
* <p>
* 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.
* <p>
* The underlying printer/parser can be altered to behave exactly as required
* by using one of the decorator modifiers:
* <ul>
* <li>{@link #withLocale(Locale)} - returns a new formatter that uses the specified locale
* <li>{@link #withZone(DateTimeZone)} - returns a new formatter that uses the specified time zone
* <li>{@link #withChronology(Chronology)} - returns a new formatter that uses the specified chronology
* <li>{@link #withOffsetParsed()} - returns a new formatter that returns the parsed time zone offset
* <li>{@link #withPivotYear(int)} - returns a new formatter with the specified pivot year
* <li>{@link #withDefaultYear(int)} - returns a new formatter with the specified default year
* </ul>
* Each of these returns a new formatter (instances of this class are immutable).
* <p>
* The main methods of the class are the <code>printXxx and
* <code>parseXxx methods. These are used as follows:
* <pre>
* // 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);
* </pre>
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* When printing, this chronology will be used in preference to the chronology
* from the datetime that would otherwise be used.
* <p>
* When parsing, this chronology will be set on the parsed datetime.
* <p>
* 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.
* <p>
* When printing, UTC will be used in preference to the zone
* from the datetime that would otherwise be used.
* <p>
* When parsing, UTC will be set on the parsed datetime.
* <p>
* 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.
* <p>
* When printing, this zone will be used in preference to the zone
* from the datetime that would otherwise be used.
* <p>
* When parsing, this zone will be set on the parsed datetime.
* <p>
* 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.
* <p>
* This setting is useful for changing the pivot year of formats built
* using a pattern - {@link DateTimeFormat#forPattern(String)}.
* <p>
* When parsing, this pivot year is used. Null means no-override.
* There is no effect when printing.
* <p>
* 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 <code>(pivot - 50) .. (pivot + 49).
*
* <pre>
* 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
* </pre>
*
* @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.
* <p>
* This setting is useful for changing the pivot year of formats built
* using a pattern - {@link DateTimeFormat#forPattern(String)}.
* <p>
* When parsing, this pivot year is used.
* There is no effect when printing.
* <p>
* 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 <code>(pivot - 50) .. (pivot + 49).
*
* <pre>
* 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
* </pre>
*
* @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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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)}.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* 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.
* <p>
* The parse will use the zone and chronology specified on this formatter.
* <p>
* 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.
* <p>
* The parse will use the zone and chronology specified on this formatter.
* <p>
* 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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