--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/time/format/DateTimeFormatterBuilder.java Tue Jan 22 20:59:21 2013 -0800
@@ -0,0 +1,3365 @@
+/*
+ * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * 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
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * 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) 2008-2012, 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
+ * and/or other materials provided with the distribution.
+ *
+ * * Neither the name of JSR-310 nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package java.time.format;
+
+import static java.time.temporal.ChronoField.DAY_OF_MONTH;
+import static java.time.temporal.ChronoField.HOUR_OF_DAY;
+import static java.time.temporal.ChronoField.INSTANT_SECONDS;
+import static java.time.temporal.ChronoField.MINUTE_OF_HOUR;
+import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
+import static java.time.temporal.ChronoField.NANO_OF_SECOND;
+import static java.time.temporal.ChronoField.OFFSET_SECONDS;
+import static java.time.temporal.ChronoField.SECOND_OF_MINUTE;
+import static java.time.temporal.ChronoField.YEAR;
+
+import java.lang.ref.SoftReference;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.math.RoundingMode;
+import java.text.ParsePosition;
+import java.time.DateTimeException;
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.ZoneOffset;
+import java.time.format.DateTimeTextProvider.LocaleStore;
+import java.time.temporal.Chrono;
+import java.time.temporal.ChronoField;
+import java.time.temporal.ISOChrono;
+import java.time.temporal.ISOFields;
+import java.time.temporal.Queries;
+import java.time.temporal.TemporalAccessor;
+import java.time.temporal.TemporalField;
+import java.time.temporal.TemporalQuery;
+import java.time.temporal.ValueRange;
+import java.time.temporal.WeekFields;
+import java.time.zone.ZoneRulesProvider;
+import java.util.AbstractMap.SimpleImmutableEntry;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Objects;
+import java.util.Set;
+import java.util.TimeZone;
+import java.util.concurrent.ConcurrentHashMap;
+
+import sun.util.locale.provider.TimeZoneNameUtility;
+
+/**
+ * Builder to create date-time formatters.
+ * <p>
+ * This allows a {@code DateTimeFormatter} to be created.
+ * All date-time formatters are created ultimately using this builder.
+ * <p>
+ * The basic elements of date-time can all be added:
+ * <p><ul>
+ * <li>Value - a numeric value</li>
+ * <li>Fraction - a fractional value including the decimal place. Always use this when
+ * outputting fractions to ensure that the fraction is parsed correctly</li>
+ * <li>Text - the textual equivalent for the value</li>
+ * <li>OffsetId/Offset - the {@linkplain ZoneOffset zone offset}</li>
+ * <li>ZoneId - the {@linkplain ZoneId time-zone} id</li>
+ * <li>ZoneText - the name of the time-zone</li>
+ * <li>Literal - a text literal</li>
+ * <li>Nested and Optional - formats can be nested or made optional</li>
+ * <li>Other - the printer and parser interfaces can be used to add user supplied formatting</li>
+ * </ul><p>
+ * In addition, any of the elements may be decorated by padding, either with spaces or any other character.
+ * <p>
+ * Finally, a shorthand pattern, mostly compatible with {@code java.text.SimpleDateFormat SimpleDateFormat}
+ * can be used, see {@link #appendPattern(String)}.
+ * In practice, this simply parses the pattern and calls other methods on the builder.
+ *
+ * <h3>Specification for implementors</h3>
+ * This class is a mutable builder intended for use from a single thread.
+ *
+ * @since 1.8
+ */
+public final class DateTimeFormatterBuilder {
+
+ /**
+ * Query for a time-zone that is region-only.
+ */
+ private static final TemporalQuery<ZoneId> QUERY_REGION_ONLY = (temporal) -> {
+ ZoneId zone = temporal.query(Queries.zoneId());
+ return (zone != null && zone instanceof ZoneOffset == false ? zone : null);
+ };
+
+ /**
+ * The currently active builder, used by the outermost builder.
+ */
+ private DateTimeFormatterBuilder active = this;
+ /**
+ * The parent builder, null for the outermost builder.
+ */
+ private final DateTimeFormatterBuilder parent;
+ /**
+ * The list of printers that will be used.
+ */
+ private final List<DateTimePrinterParser> printerParsers = new ArrayList<>();
+ /**
+ * Whether this builder produces an optional formatter.
+ */
+ private final boolean optional;
+ /**
+ * The width to pad the next field to.
+ */
+ private int padNextWidth;
+ /**
+ * The character to pad the next field with.
+ */
+ private char padNextChar;
+ /**
+ * The index of the last variable width value parser.
+ */
+ private int valueParserIndex = -1;
+
+ /**
+ * Constructs a new instance of the builder.
+ */
+ public DateTimeFormatterBuilder() {
+ super();
+ parent = null;
+ optional = false;
+ }
+
+ /**
+ * Constructs a new instance of the builder.
+ *
+ * @param parent the parent builder, not null
+ * @param optional whether the formatter is optional, not null
+ */
+ private DateTimeFormatterBuilder(DateTimeFormatterBuilder parent, boolean optional) {
+ super();
+ this.parent = parent;
+ this.optional = optional;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Changes the parse style to be case sensitive for the remainder of the formatter.
+ * <p>
+ * Parsing can be case sensitive or insensitive - by default it is case sensitive.
+ * This method allows the case sensitivity setting of parsing to be changed.
+ * <p>
+ * Calling this method changes the state of the builder such that all
+ * subsequent builder method calls will parse text in case sensitive mode.
+ * See {@link #parseCaseInsensitive} for the opposite setting.
+ * The parse case sensitive/insensitive methods may be called at any point
+ * in the builder, thus the parser can swap between case parsing modes
+ * multiple times during the parse.
+ * <p>
+ * Since the default is case sensitive, this method should only be used after
+ * a previous call to {@code #parseCaseInsensitive}.
+ *
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder parseCaseSensitive() {
+ appendInternal(SettingsParser.SENSITIVE);
+ return this;
+ }
+
+ /**
+ * Changes the parse style to be case insensitive for the remainder of the formatter.
+ * <p>
+ * Parsing can be case sensitive or insensitive - by default it is case sensitive.
+ * This method allows the case sensitivity setting of parsing to be changed.
+ * <p>
+ * Calling this method changes the state of the builder such that all
+ * subsequent builder method calls will parse text in case insensitive mode.
+ * See {@link #parseCaseSensitive()} for the opposite setting.
+ * The parse case sensitive/insensitive methods may be called at any point
+ * in the builder, thus the parser can swap between case parsing modes
+ * multiple times during the parse.
+ *
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder parseCaseInsensitive() {
+ appendInternal(SettingsParser.INSENSITIVE);
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Changes the parse style to be strict for the remainder of the formatter.
+ * <p>
+ * Parsing can be strict or lenient - by default its strict.
+ * This controls the degree of flexibility in matching the text and sign styles.
+ * <p>
+ * When used, this method changes the parsing to be strict from this point onwards.
+ * As strict is the default, this is normally only needed after calling {@link #parseLenient()}.
+ * The change will remain in force until the end of the formatter that is eventually
+ * constructed or until {@code parseLenient} is called.
+ *
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder parseStrict() {
+ appendInternal(SettingsParser.STRICT);
+ return this;
+ }
+
+ /**
+ * Changes the parse style to be lenient for the remainder of the formatter.
+ * Note that case sensitivity is set separately to this method.
+ * <p>
+ * Parsing can be strict or lenient - by default its strict.
+ * This controls the degree of flexibility in matching the text and sign styles.
+ * Applications calling this method should typically also call {@link #parseCaseInsensitive()}.
+ * <p>
+ * When used, this method changes the parsing to be lenient from this point onwards.
+ * The change will remain in force until the end of the formatter that is eventually
+ * constructed or until {@code parseStrict} is called.
+ *
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder parseLenient() {
+ appendInternal(SettingsParser.LENIENT);
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Appends the value of a date-time field to the formatter using a normal
+ * output style.
+ * <p>
+ * The value of the field will be output during a print.
+ * If the value cannot be obtained then an exception will be thrown.
+ * <p>
+ * The value will be printed as per the normal print of an integer value.
+ * Only negative numbers will be signed. No padding will be added.
+ * <p>
+ * The parser for a variable width value such as this normally behaves greedily,
+ * requiring one digit, but accepting as many digits as possible.
+ * This behavior can be affected by 'adjacent value parsing'.
+ * See {@link #appendValue(java.time.temporal.TemporalField, int)} for full details.
+ *
+ * @param field the field to append, not null
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendValue(TemporalField field) {
+ Objects.requireNonNull(field, "field");
+ active.valueParserIndex = appendInternal(new NumberPrinterParser(field, 1, 19, SignStyle.NORMAL));
+ return this;
+ }
+
+ /**
+ * Appends the value of a date-time field to the formatter using a fixed
+ * width, zero-padded approach.
+ * <p>
+ * The value of the field will be output during a print.
+ * If the value cannot be obtained then an exception will be thrown.
+ * <p>
+ * The value will be zero-padded on the left. If the size of the value
+ * means that it cannot be printed within the width then an exception is thrown.
+ * If the value of the field is negative then an exception is thrown during printing.
+ * <p>
+ * This method supports a special technique of parsing known as 'adjacent value parsing'.
+ * This technique solves the problem where a variable length value is followed by one or more
+ * fixed length values. The standard parser is greedy, and thus it would normally
+ * steal the digits that are needed by the fixed width value parsers that follow the
+ * variable width one.
+ * <p>
+ * No action is required to initiate 'adjacent value parsing'.
+ * When a call to {@code appendValue} with a variable width is made, the builder
+ * enters adjacent value parsing setup mode. If the immediately subsequent method
+ * call or calls on the same builder are to this method, then the parser will reserve
+ * space so that the fixed width values can be parsed.
+ * <p>
+ * For example, consider {@code builder.appendValue(YEAR).appendValue(MONTH_OF_YEAR, 2);}
+ * The year is a variable width parse of between 1 and 19 digits.
+ * The month is a fixed width parse of 2 digits.
+ * Because these were appended to the same builder immediately after one another,
+ * the year parser will reserve two digits for the month to parse.
+ * Thus, the text '201106' will correctly parse to a year of 2011 and a month of 6.
+ * Without adjacent value parsing, the year would greedily parse all six digits and leave
+ * nothing for the month.
+ * <p>
+ * Adjacent value parsing applies to each set of fixed width not-negative values in the parser
+ * that immediately follow any kind of variable width value.
+ * Calling any other append method will end the setup of adjacent value parsing.
+ * Thus, in the unlikely event that you need to avoid adjacent value parsing behavior,
+ * simply add the {@code appendValue} to another {@code DateTimeFormatterBuilder}
+ * and add that to this builder.
+ * <p>
+ * If adjacent parsing is active, then parsing must match exactly the specified
+ * number of digits in both strict and lenient modes.
+ * In addition, no positive or negative sign is permitted.
+ *
+ * @param field the field to append, not null
+ * @param width the width of the printed field, from 1 to 19
+ * @return this, for chaining, not null
+ * @throws IllegalArgumentException if the width is invalid
+ */
+ public DateTimeFormatterBuilder appendValue(TemporalField field, int width) {
+ Objects.requireNonNull(field, "field");
+ if (width < 1 || width > 19) {
+ throw new IllegalArgumentException("The width must be from 1 to 19 inclusive but was " + width);
+ }
+ NumberPrinterParser pp = new NumberPrinterParser(field, width, width, SignStyle.NOT_NEGATIVE);
+ return appendFixedWidth(width, pp);
+ }
+
+ /**
+ * Appends the value of a date-time field to the formatter providing full
+ * control over printing.
+ * <p>
+ * The value of the field will be output during a print.
+ * If the value cannot be obtained then an exception will be thrown.
+ * <p>
+ * This method provides full control of the numeric formatting, including
+ * zero-padding and the positive/negative sign.
+ * <p>
+ * The parser for a variable width value such as this normally behaves greedily,
+ * accepting as many digits as possible.
+ * This behavior can be affected by 'adjacent value parsing'.
+ * See {@link #appendValue(java.time.temporal.TemporalField, int)} for full details.
+ * <p>
+ * In strict parsing mode, the minimum number of parsed digits is {@code minWidth}.
+ * In lenient parsing mode, the minimum number of parsed digits is one.
+ * <p>
+ * If this method is invoked with equal minimum and maximum widths and a sign style of
+ * {@code NOT_NEGATIVE} then it delegates to {@code appendValue(TemporalField,int)}.
+ * In this scenario, the printing and parsing behavior described there occur.
+ *
+ * @param field the field to append, not null
+ * @param minWidth the minimum field width of the printed field, from 1 to 19
+ * @param maxWidth the maximum field width of the printed field, from 1 to 19
+ * @param signStyle the positive/negative output style, not null
+ * @return this, for chaining, not null
+ * @throws IllegalArgumentException if the widths are invalid
+ */
+ public DateTimeFormatterBuilder appendValue(
+ TemporalField field, int minWidth, int maxWidth, SignStyle signStyle) {
+ if (minWidth == maxWidth && signStyle == SignStyle.NOT_NEGATIVE) {
+ return appendValue(field, maxWidth);
+ }
+ Objects.requireNonNull(field, "field");
+ Objects.requireNonNull(signStyle, "signStyle");
+ if (minWidth < 1 || minWidth > 19) {
+ throw new IllegalArgumentException("The minimum width must be from 1 to 19 inclusive but was " + minWidth);
+ }
+ if (maxWidth < 1 || maxWidth > 19) {
+ throw new IllegalArgumentException("The maximum width must be from 1 to 19 inclusive but was " + maxWidth);
+ }
+ if (maxWidth < minWidth) {
+ throw new IllegalArgumentException("The maximum width must exceed or equal the minimum width but " +
+ maxWidth + " < " + minWidth);
+ }
+ NumberPrinterParser pp = new NumberPrinterParser(field, minWidth, maxWidth, signStyle);
+ if (minWidth == maxWidth) {
+ appendInternal(pp);
+ } else {
+ active.valueParserIndex = appendInternal(pp);
+ }
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Appends the reduced value of a date-time field to the formatter.
+ * <p>
+ * This is typically used for printing and parsing a two digit year.
+ * The {@code width} is the printed and parsed width.
+ * The {@code baseValue} is used during parsing to determine the valid range.
+ * <p>
+ * For printing, the width is used to determine the number of characters to print.
+ * The rightmost characters are output to match the width, left padding with zero.
+ * <p>
+ * For parsing, exactly the number of characters specified by the width are parsed.
+ * This is incomplete information however, so the base value is used to complete the parse.
+ * The base value is the first valid value in a range of ten to the power of width.
+ * <p>
+ * For example, a base value of {@code 1980} and a width of {@code 2} will have
+ * valid values from {@code 1980} to {@code 2079}.
+ * During parsing, the text {@code "12"} will result in the value {@code 2012} as that
+ * is the value within the range where the last two digits are "12".
+ * <p>
+ * This is a fixed width parser operating using 'adjacent value parsing'.
+ * See {@link #appendValue(java.time.temporal.TemporalField, int)} for full details.
+ *
+ * @param field the field to append, not null
+ * @param width the width of the printed and parsed field, from 1 to 18
+ * @param baseValue the base value of the range of valid values
+ * @return this, for chaining, not null
+ * @throws IllegalArgumentException if the width or base value is invalid
+ */
+ public DateTimeFormatterBuilder appendValueReduced(
+ TemporalField field, int width, int baseValue) {
+ Objects.requireNonNull(field, "field");
+ ReducedPrinterParser pp = new ReducedPrinterParser(field, width, baseValue);
+ appendFixedWidth(width, pp);
+ return this;
+ }
+
+ /**
+ * Appends a fixed width printer-parser.
+ *
+ * @param width the width
+ * @param pp the printer-parser, not null
+ * @return this, for chaining, not null
+ */
+ private DateTimeFormatterBuilder appendFixedWidth(int width, NumberPrinterParser pp) {
+ if (active.valueParserIndex >= 0) {
+ // adjacent parsing mode, update setting in previous parsers
+ NumberPrinterParser basePP = (NumberPrinterParser) active.printerParsers.get(active.valueParserIndex);
+ basePP = basePP.withSubsequentWidth(width);
+ int activeValueParser = active.valueParserIndex;
+ active.printerParsers.set(active.valueParserIndex, basePP);
+ appendInternal(pp.withFixedWidth());
+ active.valueParserIndex = activeValueParser;
+ } else {
+ // not adjacent parsing
+ appendInternal(pp);
+ }
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Appends the fractional value of a date-time field to the formatter.
+ * <p>
+ * The fractional value of the field will be output including the
+ * preceding decimal point. The preceding value is not output.
+ * For example, the second-of-minute value of 15 would be output as {@code .25}.
+ * <p>
+ * The width of the printed fraction can be controlled. Setting the
+ * minimum width to zero will cause no output to be generated.
+ * The printed fraction will have the minimum width necessary between
+ * the minimum and maximum widths - trailing zeroes are omitted.
+ * No rounding occurs due to the maximum width - digits are simply dropped.
+ * <p>
+ * When parsing in strict mode, the number of parsed digits must be between
+ * the minimum and maximum width. When parsing in lenient mode, the minimum
+ * width is considered to be zero and the maximum is nine.
+ * <p>
+ * If the value cannot be obtained then an exception will be thrown.
+ * If the value is negative an exception will be thrown.
+ * If the field does not have a fixed set of valid values then an
+ * exception will be thrown.
+ * If the field value in the date-time to be printed is invalid it
+ * cannot be printed and an exception will be thrown.
+ *
+ * @param field the field to append, not null
+ * @param minWidth the minimum width of the field excluding the decimal point, from 0 to 9
+ * @param maxWidth the maximum width of the field excluding the decimal point, from 1 to 9
+ * @param decimalPoint whether to output the localized decimal point symbol
+ * @return this, for chaining, not null
+ * @throws IllegalArgumentException if the field has a variable set of valid values or
+ * either width is invalid
+ */
+ public DateTimeFormatterBuilder appendFraction(
+ TemporalField field, int minWidth, int maxWidth, boolean decimalPoint) {
+ appendInternal(new FractionPrinterParser(field, minWidth, maxWidth, decimalPoint));
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Appends the text of a date-time field to the formatter using the full
+ * text style.
+ * <p>
+ * The text of the field will be output during a print.
+ * The value must be within the valid range of the field.
+ * If the value cannot be obtained then an exception will be thrown.
+ * If the field has no textual representation, then the numeric value will be used.
+ * <p>
+ * The value will be printed as per the normal print of an integer value.
+ * Only negative numbers will be signed. No padding will be added.
+ *
+ * @param field the field to append, not null
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendText(TemporalField field) {
+ return appendText(field, TextStyle.FULL);
+ }
+
+ /**
+ * Appends the text of a date-time field to the formatter.
+ * <p>
+ * The text of the field will be output during a print.
+ * The value must be within the valid range of the field.
+ * If the value cannot be obtained then an exception will be thrown.
+ * If the field has no textual representation, then the numeric value will be used.
+ * <p>
+ * The value will be printed as per the normal print of an integer value.
+ * Only negative numbers will be signed. No padding will be added.
+ *
+ * @param field the field to append, not null
+ * @param textStyle the text style to use, not null
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendText(TemporalField field, TextStyle textStyle) {
+ Objects.requireNonNull(field, "field");
+ Objects.requireNonNull(textStyle, "textStyle");
+ appendInternal(new TextPrinterParser(field, textStyle, DateTimeTextProvider.getInstance()));
+ return this;
+ }
+
+ /**
+ * Appends the text of a date-time field to the formatter using the specified
+ * map to supply the text.
+ * <p>
+ * The standard text outputting methods use the localized text in the JDK.
+ * This method allows that text to be specified directly.
+ * The supplied map is not validated by the builder to ensure that printing or
+ * parsing is possible, thus an invalid map may throw an error during later use.
+ * <p>
+ * Supplying the map of text provides considerable flexibility in printing and parsing.
+ * For example, a legacy application might require or supply the months of the
+ * year as "JNY", "FBY", "MCH" etc. These do not match the standard set of text
+ * for localized month names. Using this method, a map can be created which
+ * defines the connection between each value and the text:
+ * <pre>
+ * Map<Long, String> map = new HashMap<>();
+ * map.put(1, "JNY");
+ * map.put(2, "FBY");
+ * map.put(3, "MCH");
+ * ...
+ * builder.appendText(MONTH_OF_YEAR, map);
+ * </pre>
+ * <p>
+ * Other uses might be to output the value with a suffix, such as "1st", "2nd", "3rd",
+ * or as Roman numerals "I", "II", "III", "IV".
+ * <p>
+ * During printing, the value is obtained and checked that it is in the valid range.
+ * If text is not available for the value then it is output as a number.
+ * During parsing, the parser will match against the map of text and numeric values.
+ *
+ * @param field the field to append, not null
+ * @param textLookup the map from the value to the text
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendText(TemporalField field, Map<Long, String> textLookup) {
+ Objects.requireNonNull(field, "field");
+ Objects.requireNonNull(textLookup, "textLookup");
+ Map<Long, String> copy = new LinkedHashMap<>(textLookup);
+ Map<TextStyle, Map<Long, String>> map = Collections.singletonMap(TextStyle.FULL, copy);
+ final LocaleStore store = new LocaleStore(map);
+ DateTimeTextProvider provider = new DateTimeTextProvider() {
+ @Override
+ public String getText(TemporalField field, long value, TextStyle style, Locale locale) {
+ return store.getText(value, style);
+ }
+ @Override
+ public Iterator<Entry<String, Long>> getTextIterator(TemporalField field, TextStyle style, Locale locale) {
+ return store.getTextIterator(style);
+ }
+ };
+ appendInternal(new TextPrinterParser(field, TextStyle.FULL, provider));
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Appends an instant using ISO-8601 to the formatter.
+ * <p>
+ * Instants have a fixed output format.
+ * They are converted to a date-time with a zone-offset of UTC and printed
+ * using the standard ISO-8601 format.
+ * <p>
+ * An alternative to this method is to print/parse the instant as a single
+ * epoch-seconds value. That is achieved using {@code appendValue(INSTANT_SECONDS)}.
+ *
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendInstant() {
+ appendInternal(new InstantPrinterParser());
+ return this;
+ }
+
+ /**
+ * Appends the zone offset, such as '+01:00', to the formatter.
+ * <p>
+ * This appends an instruction to print/parse the offset ID to the builder.
+ * This is equivalent to calling {@code appendOffset("HH:MM:ss", "Z")}.
+ *
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendOffsetId() {
+ appendInternal(OffsetIdPrinterParser.INSTANCE_ID);
+ return this;
+ }
+
+ /**
+ * Appends the zone offset, such as '+01:00', to the formatter.
+ * <p>
+ * This appends an instruction to print/parse the offset ID to the builder.
+ * <p>
+ * During printing, the offset is obtained using a mechanism equivalent
+ * to querying the temporal with {@link Queries#offset()}.
+ * It will be printed using the format defined below.
+ * If the offset cannot be obtained then an exception is thrown unless the
+ * section of the formatter is optional.
+ * <p>
+ * During parsing, the offset is parsed using the format defined below.
+ * If the offset cannot be parsed then an exception is thrown unless the
+ * section of the formatter is optional.
+ * <p>
+ * The format of the offset is controlled by a pattern which must be one
+ * of the following:
+ * <p><ul>
+ * <li>{@code +HH} - hour only, ignoring any minute
+ * <li>{@code +HHMM} - hour and minute, no colon
+ * <li>{@code +HH:MM} - hour and minute, with colon
+ * <li>{@code +HHMMss} - hour and minute, with second if non-zero and no colon
+ * <li>{@code +HH:MM:ss} - hour and minute, with second if non-zero and colon
+ * <li>{@code +HHMMSS} - hour, minute and second, no colon
+ * <li>{@code +HH:MM:SS} - hour, minute and second, with colon
+ * </ul><p>
+ * The "no offset" text controls what text is printed when the offset is zero.
+ * Example values would be 'Z', '+00:00', 'UTC' or 'GMT'.
+ * Three formats are accepted for parsing UTC - the "no offset" text, and the
+ * plus and minus versions of zero defined by the pattern.
+ *
+ * @param pattern the pattern to use, not null
+ * @param noOffsetText the text to use when the offset is zero, not null
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendOffset(String pattern, String noOffsetText) {
+ appendInternal(new OffsetIdPrinterParser(noOffsetText, pattern));
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Appends the time-zone ID, such as 'Europe/Paris' or '+02:00', to the formatter.
+ * <p>
+ * This appends an instruction to print/parse the zone ID to the builder.
+ * The zone ID is obtained in a strict manner suitable for {@code ZonedDateTime}.
+ * By contrast, {@code OffsetDateTime} does not have a zone ID suitable
+ * for use with this method, see {@link #appendZoneOrOffsetId()}.
+ * <p>
+ * During printing, the zone is obtained using a mechanism equivalent
+ * to querying the temporal with {@link Queries#zoneId()}.
+ * It will be printed using the result of {@link ZoneId#getId()}.
+ * If the zone cannot be obtained then an exception is thrown unless the
+ * section of the formatter is optional.
+ * <p>
+ * During parsing, the zone is parsed and must match a known zone or offset.
+ * If the zone cannot be parsed then an exception is thrown unless the
+ * section of the formatter is optional.
+ *
+ * @return this, for chaining, not null
+ * @see #appendZoneRegionId()
+ */
+ public DateTimeFormatterBuilder appendZoneId() {
+ appendInternal(new ZoneIdPrinterParser(Queries.zoneId(), "ZoneId()"));
+ return this;
+ }
+
+ /**
+ * Appends the time-zone region ID, such as 'Europe/Paris', to the formatter,
+ * rejecting the zone ID if it is a {@code ZoneOffset}.
+ * <p>
+ * This appends an instruction to print/parse the zone ID to the builder
+ * only if it is a region-based ID.
+ * <p>
+ * During printing, the zone is obtained using a mechanism equivalent
+ * to querying the temporal with {@link Queries#zoneId()}.
+ * If the zone is a {@code ZoneOffset} or it cannot be obtained then
+ * an exception is thrown unless the section of the formatter is optional.
+ * If the zone is not an offset, then the zone will be printed using
+ * the zone ID from {@link ZoneId#getId()}.
+ * <p>
+ * During parsing, the zone is parsed and must match a known zone or offset.
+ * If the zone cannot be parsed then an exception is thrown unless the
+ * section of the formatter is optional.
+ * Note that parsing accepts offsets, whereas printing will never produce
+ * one, thus parsing is equivalent to {@code appendZoneId}.
+ *
+ * @return this, for chaining, not null
+ * @see #appendZoneId()
+ */
+ public DateTimeFormatterBuilder appendZoneRegionId() {
+ appendInternal(new ZoneIdPrinterParser(QUERY_REGION_ONLY, "ZoneRegionId()"));
+ return this;
+ }
+
+ /**
+ * Appends the time-zone ID, such as 'Europe/Paris' or '+02:00', to
+ * the formatter, using the best available zone ID.
+ * <p>
+ * This appends an instruction to print/parse the best available
+ * zone or offset ID to the builder.
+ * The zone ID is obtained in a lenient manner that first attempts to
+ * find a true zone ID, such as that on {@code ZonedDateTime}, and
+ * then attempts to find an offset, such as that on {@code OffsetDateTime}.
+ * <p>
+ * During printing, the zone is obtained using a mechanism equivalent
+ * to querying the temporal with {@link Queries#zone()}.
+ * It will be printed using the result of {@link ZoneId#getId()}.
+ * If the zone cannot be obtained then an exception is thrown unless the
+ * section of the formatter is optional.
+ * <p>
+ * During parsing, the zone is parsed and must match a known zone or offset.
+ * If the zone cannot be parsed then an exception is thrown unless the
+ * section of the formatter is optional.
+ * <p>
+ * This method is is identical to {@code appendZoneId()} except in the
+ * mechanism used to obtain the zone.
+ *
+ * @return this, for chaining, not null
+ * @see #appendZoneId()
+ */
+ public DateTimeFormatterBuilder appendZoneOrOffsetId() {
+ appendInternal(new ZoneIdPrinterParser(Queries.zone(), "ZoneOrOffsetId()"));
+ return this;
+ }
+
+ /**
+ * Appends the time-zone name, such as 'British Summer Time', to the formatter.
+ * <p>
+ * This appends an instruction to print the textual name of the zone to the builder.
+ * <p>
+ * During printing, the zone is obtained using a mechanism equivalent
+ * to querying the temporal with {@link Queries#zoneId()}.
+ * If the zone is a {@code ZoneOffset} it will be printed using the
+ * result of {@link ZoneOffset#getId()}.
+ * If the zone is not an offset, the textual name will be looked up
+ * for the locale set in the {@link DateTimeFormatter}.
+ * If the temporal object being printed represents an instant, then the text
+ * will be the summer or winter time text as appropriate.
+ * If the lookup for text does not find any suitable reuslt, then the
+ * {@link ZoneId#getId() ID} will be printed instead.
+ * If the zone cannot be obtained then an exception is thrown unless the
+ * section of the formatter is optional.
+ * <p>
+ * Parsing is not currently supported.
+ *
+ * @param textStyle the text style to use, not null
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendZoneText(TextStyle textStyle) {
+ // TODO: parsing of zone text?
+// * During parsing, either the textual zone name, the zone ID or the offset
+// * is accepted.
+// * If the zone cannot be parsed then an exception is thrown unless the
+// * section of the formatter is optional.
+ appendInternal(new ZoneTextPrinterParser(textStyle));
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Appends the chronology ID to the formatter.
+ * <p>
+ * The chronology ID will be output during a print.
+ * If the chronology cannot be obtained then an exception will be thrown.
+ *
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendChronoId() {
+ appendInternal(new ChronoPrinterParser(null));
+ return this;
+ }
+
+ /**
+ * Appends the chronology name to the formatter.
+ * <p>
+ * The calendar system name will be output during a print.
+ * If the chronology cannot be obtained then an exception will be thrown.
+ * The calendar system name is obtained from the formatting symbols.
+ *
+ * @param textStyle the text style to use, not null
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendChronoText(TextStyle textStyle) {
+ Objects.requireNonNull(textStyle, "textStyle");
+ appendInternal(new ChronoPrinterParser(textStyle));
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Appends a localized date-time pattern to the formatter.
+ * <p>
+ * The pattern is resolved lazily using the locale being used during the print/parse
+ * (stored in {@link DateTimeFormatter}.
+ * <p>
+ * The pattern can vary by chronology, although typically it doesn't.
+ * This method uses the standard ISO chronology patterns.
+ *
+ * @param dateStyle the date style to use, null means no date required
+ * @param timeStyle the time style to use, null means no time required
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendLocalized(FormatStyle dateStyle, FormatStyle timeStyle) {
+ return appendLocalized(dateStyle, timeStyle, ISOChrono.INSTANCE);
+ }
+
+ /**
+ * Appends a localized date-time pattern to the formatter.
+ * <p>
+ * The pattern is resolved lazily using the locale being used during the print/parse,
+ * stored in {@link DateTimeFormatter}.
+ * <p>
+ * The pattern can vary by chronology, although typically it doesn't.
+ * This method allows the chronology to be specified.
+ *
+ * @param dateStyle the date style to use, null means no date required
+ * @param timeStyle the time style to use, null means no time required
+ * @param chrono the chronology to use, not null
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendLocalized(FormatStyle dateStyle, FormatStyle timeStyle, Chrono<?> chrono) {
+ Objects.requireNonNull(chrono, "chrono");
+ if (dateStyle != null || timeStyle != null) {
+ appendInternal(new LocalizedPrinterParser(dateStyle, timeStyle, chrono));
+ }
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Appends a character literal to the formatter.
+ * <p>
+ * This character will be output during a print.
+ *
+ * @param literal the literal to append, not null
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendLiteral(char literal) {
+ appendInternal(new CharLiteralPrinterParser(literal));
+ return this;
+ }
+
+ /**
+ * Appends a string literal to the formatter.
+ * <p>
+ * This string will be output during a print.
+ * <p>
+ * If the literal is empty, nothing is added to the formatter.
+ *
+ * @param literal the literal to append, not null
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendLiteral(String literal) {
+ Objects.requireNonNull(literal, "literal");
+ if (literal.length() > 0) {
+ if (literal.length() == 1) {
+ appendInternal(new CharLiteralPrinterParser(literal.charAt(0)));
+ } else {
+ appendInternal(new StringLiteralPrinterParser(literal));
+ }
+ }
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Appends all the elements of a formatter to the builder.
+ * <p>
+ * This method has the same effect as appending each of the constituent
+ * parts of the formatter directly to this builder.
+ *
+ * @param formatter the formatter to add, not null
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder append(DateTimeFormatter formatter) {
+ Objects.requireNonNull(formatter, "formatter");
+ appendInternal(formatter.toPrinterParser(false));
+ return this;
+ }
+
+ /**
+ * Appends a formatter to the builder which will optionally print/parse.
+ * <p>
+ * This method has the same effect as appending each of the constituent
+ * parts directly to this builder surrounded by an {@link #optionalStart()} and
+ * {@link #optionalEnd()}.
+ * <p>
+ * The formatter will print if data is available for all the fields contained within it.
+ * The formatter will parse if the string matches, otherwise no error is returned.
+ *
+ * @param formatter the formatter to add, not null
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder appendOptional(DateTimeFormatter formatter) {
+ Objects.requireNonNull(formatter, "formatter");
+ appendInternal(formatter.toPrinterParser(true));
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Appends the elements defined by the specified pattern to the builder.
+ * <p>
+ * All letters 'A' to 'Z' and 'a' to 'z' are reserved as pattern letters.
+ * The characters '{' and '}' are reserved for future use.
+ * The characters '[' and ']' indicate optional patterns.
+ * The following pattern letters are defined:
+ * <pre>
+ * Symbol Meaning Presentation Examples
+ * ------ ------- ------------ -------
+ * G era number/text 1; 01; AD; Anno Domini
+ * y year year 2004; 04
+ * D day-of-year number 189
+ * M month-of-year number/text 7; 07; Jul; July; J
+ * d day-of-month number 10
+ *
+ * Q quarter-of-year number/text 3; 03; Q3
+ * Y week-based-year year 1996; 96
+ * w week-of-year number 27
+ * W week-of-month number 27
+ * e localized day-of-week number 2; Tue; Tuesday; T
+ * E day-of-week number/text 2; Tue; Tuesday; T
+ * F week-of-month number 3
+ *
+ * a am-pm-of-day text PM
+ * h clock-hour-of-am-pm (1-12) number 12
+ * K hour-of-am-pm (0-11) number 0
+ * k clock-hour-of-am-pm (1-24) number 0
+ *
+ * H hour-of-day (0-23) number 0
+ * m minute-of-hour number 30
+ * s second-of-minute number 55
+ * S fraction-of-second fraction 978
+ * A milli-of-day number 1234
+ * n nano-of-second number 987654321
+ * N nano-of-day number 1234000000
+ *
+ * I time-zone ID zoneId America/Los_Angeles
+ * z time-zone name text Pacific Standard Time; PST
+ * Z zone-offset offset-Z +0000; -0800; -08:00;
+ * X zone-offset 'Z' for zero offset-X Z; -08; -0830; -08:30; -083015; -08:30:15;
+ *
+ * p pad next pad modifier 1
+ *
+ * ' escape for text delimiter
+ * '' single quote literal '
+ * [ optional section start
+ * ] optional section end
+ * {} reserved for future use
+ * </pre>
+ * <p>
+ * The count of pattern letters determine the format.
+ * <p>
+ * <b>Text</b>: The text style is determined based on the number of pattern letters used.
+ * Less than 4 pattern letters will use the {@link TextStyle#SHORT short form}.
+ * Exactly 4 pattern letters will use the {@link TextStyle#FULL full form}.
+ * Exactly 5 pattern letters will use the {@link TextStyle#NARROW narrow form}.
+ * <p>
+ * <b>Number</b>: If the count of letters is one, then the value is printed using the minimum number
+ * of digits and without padding as per {@link #appendValue(java.time.temporal.TemporalField)}. Otherwise, the
+ * count of digits is used as the width of the output field as per {@link #appendValue(java.time.temporal.TemporalField, int)}.
+ * <p>
+ * <b>Number/Text</b>: If the count of pattern letters is 3 or greater, use the Text rules above.
+ * Otherwise use the Number rules above.
+ * <p>
+ * <b>Fraction</b>: Outputs the nano-of-second field as a fraction-of-second.
+ * The nano-of-second value has nine digits, thus the count of pattern letters is from 1 to 9.
+ * If it is less than 9, then the nano-of-second value is truncated, with only the most
+ * significant digits being output.
+ * When parsing in strict mode, the number of parsed digits must match the count of pattern letters.
+ * When parsing in lenient mode, the number of parsed digits must be at least the count of pattern
+ * letters, up to 9 digits.
+ * <p>
+ * <b>Year</b>: The count of letters determines the minimum field width below which padding is used.
+ * If the count of letters is two, then a {@link #appendValueReduced reduced} two digit form is used.
+ * For printing, this outputs the rightmost two digits. For parsing, this will parse using the
+ * base value of 2000, resulting in a year within the range 2000 to 2099 inclusive.
+ * If the count of letters is less than four (but not two), then the sign is only output for negative
+ * years as per {@link SignStyle#NORMAL}.
+ * Otherwise, the sign is output if the pad width is exceeded, as per {@link SignStyle#EXCEEDS_PAD}
+ * <p>
+ * <b>ZoneId</b>: 'I' outputs the zone ID, such as 'Europe/Paris'.
+ * <p>
+ * <b>Offset X</b>: This formats the offset using 'Z' when the offset is zero.
+ * One letter outputs just the hour', such as '+01'
+ * Two letters outputs the hour and minute, without a colon, such as '+0130'.
+ * Three letters outputs the hour and minute, with a colon, such as '+01:30'.
+ * Four letters outputs the hour and minute and optional second, without a colon, such as '+013015'.
+ * Five letters outputs the hour and minute and optional second, with a colon, such as '+01:30:15'.
+ * <p>
+ * <b>Offset Z</b>: This formats the offset using '+0000' or '+00:00' when the offset is zero.
+ * One or two letters outputs the hour and minute, without a colon, such as '+0130'.
+ * Three letters outputs the hour and minute, with a colon, such as '+01:30'.
+ * <p>
+ * <b>Zone names</b>: Time zone names ('z') cannot be parsed.
+ * <p>
+ * <b>Optional section</b>: The optional section markers work exactly like calling {@link #optionalStart()}
+ * and {@link #optionalEnd()}.
+ * <p>
+ * <b>Pad modifier</b>: Modifies the pattern that immediately follows to be padded with spaces.
+ * The pad width is determined by the number of pattern letters.
+ * This is the same as calling {@link #padNext(int)}.
+ * <p>
+ * For example, 'ppH' outputs the hour-of-day padded on the left with spaces to a width of 2.
+ * <p>
+ * Any unrecognized letter is an error.
+ * Any non-letter character, other than '[', ']', '{', '}' and the single quote will be output directly.
+ * Despite this, it is recommended to use single quotes around all characters that you want to
+ * output directly to ensure that future changes do not break your application.
+ * <p>
+ * The pattern string is similar, but not identical, to {@link java.text.SimpleDateFormat SimpleDateFormat}.
+ * Pattern letters 'E' and 'u' are merged, which changes the meaning of "E" and "EE" to be numeric.
+ * Pattern letters 'Z' and 'X' are extended.
+ * Pattern letter 'y' and 'Y' parse years of two digits and more than 4 digits differently.
+ * Pattern letters 'n', 'A', 'N', 'I' and 'p' are added.
+ * Number types will reject large numbers.
+ * The pattern string is also similar, but not identical, to that defined by the
+ * Unicode Common Locale Data Repository (CLDR).
+ *
+ * @param pattern the pattern to add, not null
+ * @return this, for chaining, not null
+ * @throws IllegalArgumentException if the pattern is invalid
+ */
+ public DateTimeFormatterBuilder appendPattern(String pattern) {
+ Objects.requireNonNull(pattern, "pattern");
+ parsePattern(pattern);
+ return this;
+ }
+
+ private void parsePattern(String pattern) {
+ for (int pos = 0; pos < pattern.length(); pos++) {
+ char cur = pattern.charAt(pos);
+ if ((cur >= 'A' && cur <= 'Z') || (cur >= 'a' && cur <= 'z')) {
+ int start = pos++;
+ for ( ; pos < pattern.length() && pattern.charAt(pos) == cur; pos++); // short loop
+ int count = pos - start;
+ // padding
+ if (cur == 'p') {
+ int pad = 0;
+ if (pos < pattern.length()) {
+ cur = pattern.charAt(pos);
+ if ((cur >= 'A' && cur <= 'Z') || (cur >= 'a' && cur <= 'z')) {
+ pad = count;
+ start = pos++;
+ for ( ; pos < pattern.length() && pattern.charAt(pos) == cur; pos++); // short loop
+ count = pos - start;
+ }
+ }
+ if (pad == 0) {
+ throw new IllegalArgumentException(
+ "Pad letter 'p' must be followed by valid pad pattern: " + pattern);
+ }
+ padNext(pad); // pad and continue parsing
+ }
+ // main rules
+ TemporalField field = FIELD_MAP.get(cur);
+ if (field != null) {
+ parseField(cur, count, field);
+ } else if (cur == 'z') {
+ if (count < 4) {
+ appendZoneText(TextStyle.SHORT);
+ } else {
+ appendZoneText(TextStyle.FULL);
+ }
+ } else if (cur == 'I') {
+ appendZoneId();
+ } else if (cur == 'Z') {
+ if (count > 3) {
+ throw new IllegalArgumentException("Too many pattern letters: " + cur);
+ }
+ if (count < 3) {
+ appendOffset("+HHMM", "+0000");
+ } else {
+ appendOffset("+HH:MM", "+00:00");
+ }
+ } else if (cur == 'X') {
+ if (count > 5) {
+ throw new IllegalArgumentException("Too many pattern letters: " + cur);
+ }
+ appendOffset(OffsetIdPrinterParser.PATTERNS[count - 1], "Z");
+ } else if (cur == 'w' || cur == 'e') {
+ // Fields defined by Locale
+ if (count > 1) {
+ throw new IllegalArgumentException("Too many pattern letters: " + cur);
+ }
+ appendInternal(new WeekBasedFieldPrinterParser(cur, count));
+ } else if (cur == 'W') {
+ // Fields defined by Locale
+ if (count > 2) {
+ throw new IllegalArgumentException("Too many pattern letters: " + cur);
+ }
+ appendInternal(new WeekBasedFieldPrinterParser(cur, count));
+ } else {
+ throw new IllegalArgumentException("Unknown pattern letter: " + cur);
+ }
+ pos--;
+
+ } else if (cur == '\'') {
+ // parse literals
+ int start = pos++;
+ for ( ; pos < pattern.length(); pos++) {
+ if (pattern.charAt(pos) == '\'') {
+ if (pos + 1 < pattern.length() && pattern.charAt(pos + 1) == '\'') {
+ pos++;
+ } else {
+ break; // end of literal
+ }
+ }
+ }
+ if (pos >= pattern.length()) {
+ throw new IllegalArgumentException("Pattern ends with an incomplete string literal: " + pattern);
+ }
+ String str = pattern.substring(start + 1, pos);
+ if (str.length() == 0) {
+ appendLiteral('\'');
+ } else {
+ appendLiteral(str.replace("''", "'"));
+ }
+
+ } else if (cur == '[') {
+ optionalStart();
+
+ } else if (cur == ']') {
+ if (active.parent == null) {
+ throw new IllegalArgumentException("Pattern invalid as it contains ] without previous [");
+ }
+ optionalEnd();
+
+ } else if (cur == '{' || cur == '}') {
+ throw new IllegalArgumentException("Pattern includes reserved character: '" + cur + "'");
+ } else {
+ appendLiteral(cur);
+ }
+ }
+ }
+
+ private void parseField(char cur, int count, TemporalField field) {
+ switch (cur) {
+ case 'y':
+ case 'Y':
+ if (count == 2) {
+ appendValueReduced(field, 2, 2000);
+ } else if (count < 4) {
+ appendValue(field, count, 19, SignStyle.NORMAL);
+ } else {
+ appendValue(field, count, 19, SignStyle.EXCEEDS_PAD);
+ }
+ break;
+ case 'G':
+ case 'M':
+ case 'Q':
+ case 'E':
+ switch (count) {
+ case 1:
+ appendValue(field);
+ break;
+ case 2:
+ appendValue(field, 2);
+ break;
+ case 3:
+ appendText(field, TextStyle.SHORT);
+ break;
+ case 4:
+ appendText(field, TextStyle.FULL);
+ break;
+ case 5:
+ appendText(field, TextStyle.NARROW);
+ break;
+ default:
+ throw new IllegalArgumentException("Too many pattern letters: " + cur);
+ }
+ break;
+ case 'a':
+ switch (count) {
+ case 1:
+ case 2:
+ case 3:
+ appendText(field, TextStyle.SHORT);
+ break;
+ case 4:
+ appendText(field, TextStyle.FULL);
+ break;
+ case 5:
+ appendText(field, TextStyle.NARROW);
+ break;
+ default:
+ throw new IllegalArgumentException("Too many pattern letters: " + cur);
+ }
+ break;
+ case 'S':
+ appendFraction(NANO_OF_SECOND, count, count, false);
+ break;
+ default:
+ if (count == 1) {
+ appendValue(field);
+ } else {
+ appendValue(field, count);
+ }
+ break;
+ }
+ }
+
+ /** Map of letters to fields. */
+ private static final Map<Character, TemporalField> FIELD_MAP = new HashMap<>();
+ static {
+ FIELD_MAP.put('G', ChronoField.ERA); // Java, CLDR (different to both for 1/2 chars)
+ FIELD_MAP.put('y', ChronoField.YEAR); // CLDR
+ // FIELD_MAP.put('y', ChronoField.YEAR_OF_ERA); // Java, CLDR // TODO redefine from above
+ // FIELD_MAP.put('u', ChronoField.YEAR); // CLDR // TODO
+ // FIELD_MAP.put('Y', ISODateTimeField.WEEK_BASED_YEAR); // Java7, CLDR (needs localized week number) // TODO
+ FIELD_MAP.put('Q', ISOFields.QUARTER_OF_YEAR); // CLDR (removed quarter from 310)
+ FIELD_MAP.put('M', ChronoField.MONTH_OF_YEAR); // Java, CLDR
+ // FIELD_MAP.put('w', WeekFields.weekOfYear()); // Java, CLDR (needs localized week number)
+ // FIELD_MAP.put('W', WeekFields.weekOfMonth()); // Java, CLDR (needs localized week number)
+ FIELD_MAP.put('D', ChronoField.DAY_OF_YEAR); // Java, CLDR
+ FIELD_MAP.put('d', ChronoField.DAY_OF_MONTH); // Java, CLDR
+ FIELD_MAP.put('F', ChronoField.ALIGNED_WEEK_OF_MONTH); // Java, CLDR
+ FIELD_MAP.put('E', ChronoField.DAY_OF_WEEK); // Java, CLDR (different to both for 1/2 chars)
+ // FIELD_MAP.put('e', WeekFields.dayOfWeek()); // CLDR (needs localized week number)
+ FIELD_MAP.put('a', ChronoField.AMPM_OF_DAY); // Java, CLDR
+ FIELD_MAP.put('H', ChronoField.HOUR_OF_DAY); // Java, CLDR
+ FIELD_MAP.put('k', ChronoField.CLOCK_HOUR_OF_DAY); // Java, CLDR
+ FIELD_MAP.put('K', ChronoField.HOUR_OF_AMPM); // Java, CLDR
+ FIELD_MAP.put('h', ChronoField.CLOCK_HOUR_OF_AMPM); // Java, CLDR
+ FIELD_MAP.put('m', ChronoField.MINUTE_OF_HOUR); // Java, CLDR
+ FIELD_MAP.put('s', ChronoField.SECOND_OF_MINUTE); // Java, CLDR
+ FIELD_MAP.put('S', ChronoField.NANO_OF_SECOND); // CLDR (Java uses milli-of-second number)
+ FIELD_MAP.put('A', ChronoField.MILLI_OF_DAY); // CLDR
+ FIELD_MAP.put('n', ChronoField.NANO_OF_SECOND); // 310
+ FIELD_MAP.put('N', ChronoField.NANO_OF_DAY); // 310
+ // reserved - z,Z,X,I,p
+ // Java - X - compatible, but extended to 4 and 5 letters
+ // Java - u - clashes with CLDR, go with CLDR (year-proleptic) here
+ // CLDR - U - cycle year name, not supported by 310 yet
+ // CLDR - l - deprecated
+ // CLDR - j - not relevant
+ // CLDR - g - modified-julian-day
+ // CLDR - z - time-zone names // TODO properly
+ // CLDR - Z - different approach here // TODO bring 310 in line with CLDR
+ // CLDR - v,V - extended time-zone names
+ // CLDR - q/c/L - standalone quarter/day-of-week/month
+ // 310 - I - time-zone id
+ // 310 - p - prefix for padding
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Causes the next added printer/parser to pad to a fixed width using a space.
+ * <p>
+ * This padding will pad to a fixed width using spaces.
+ * <p>
+ * An exception will be thrown during printing if the pad width
+ * is exceeded.
+ *
+ * @param padWidth the pad width, 1 or greater
+ * @return this, for chaining, not null
+ * @throws IllegalArgumentException if pad width is too small
+ */
+ public DateTimeFormatterBuilder padNext(int padWidth) {
+ return padNext(padWidth, ' ');
+ }
+
+ /**
+ * Causes the next added printer/parser to pad to a fixed width.
+ * <p>
+ * This padding is intended for padding other than zero-padding.
+ * Zero-padding should be achieved using the appendValue methods.
+ * <p>
+ * An exception will be thrown during printing if the pad width
+ * is exceeded.
+ *
+ * @param padWidth the pad width, 1 or greater
+ * @param padChar the pad character
+ * @return this, for chaining, not null
+ * @throws IllegalArgumentException if pad width is too small
+ */
+ public DateTimeFormatterBuilder padNext(int padWidth, char padChar) {
+ if (padWidth < 1) {
+ throw new IllegalArgumentException("The pad width must be at least one but was " + padWidth);
+ }
+ active.padNextWidth = padWidth;
+ active.padNextChar = padChar;
+ active.valueParserIndex = -1;
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Mark the start of an optional section.
+ * <p>
+ * The output of printing can include optional sections, which may be nested.
+ * An optional section is started by calling this method and ended by calling
+ * {@link #optionalEnd()} or by ending the build process.
+ * <p>
+ * All elements in the optional section are treated as optional.
+ * During printing, the section is only output if data is available in the
+ * {@code TemporalAccessor} for all the elements in the section.
+ * During parsing, the whole section may be missing from the parsed string.
+ * <p>
+ * For example, consider a builder setup as
+ * {@code builder.appendValue(HOUR_OF_DAY,2).optionalStart().appendValue(MINUTE_OF_HOUR,2)}.
+ * The optional section ends automatically at the end of the builder.
+ * During printing, the minute will only be output if its value can be obtained from the date-time.
+ * During parsing, the input will be successfully parsed whether the minute is present or not.
+ *
+ * @return this, for chaining, not null
+ */
+ public DateTimeFormatterBuilder optionalStart() {
+ active.valueParserIndex = -1;
+ active = new DateTimeFormatterBuilder(active, true);
+ return this;
+ }
+
+ /**
+ * Ends an optional section.
+ * <p>
+ * The output of printing can include optional sections, which may be nested.
+ * An optional section is started by calling {@link #optionalStart()} and ended
+ * using this method (or at the end of the builder).
+ * <p>
+ * Calling this method without having previously called {@code optionalStart}
+ * will throw an exception.
+ * Calling this method immediately after calling {@code optionalStart} has no effect
+ * on the formatter other than ending the (empty) optional section.
+ * <p>
+ * All elements in the optional section are treated as optional.
+ * During printing, the section is only output if data is available in the
+ * {@code TemporalAccessor} for all the elements in the section.
+ * During parsing, the whole section may be missing from the parsed string.
+ * <p>
+ * For example, consider a builder setup as
+ * {@code builder.appendValue(HOUR_OF_DAY,2).optionalStart().appendValue(MINUTE_OF_HOUR,2).optionalEnd()}.
+ * During printing, the minute will only be output if its value can be obtained from the date-time.
+ * During parsing, the input will be successfully parsed whether the minute is present or not.
+ *
+ * @return this, for chaining, not null
+ * @throws IllegalStateException if there was no previous call to {@code optionalStart}
+ */
+ public DateTimeFormatterBuilder optionalEnd() {
+ if (active.parent == null) {
+ throw new IllegalStateException("Cannot call optionalEnd() as there was no previous call to optionalStart()");
+ }
+ if (active.printerParsers.size() > 0) {
+ CompositePrinterParser cpp = new CompositePrinterParser(active.printerParsers, active.optional);
+ active = active.parent;
+ appendInternal(cpp);
+ } else {
+ active = active.parent;
+ }
+ return this;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Appends a printer and/or parser to the internal list handling padding.
+ *
+ * @param pp the printer-parser to add, not null
+ * @return the index into the active parsers list
+ */
+ private int appendInternal(DateTimePrinterParser pp) {
+ Objects.requireNonNull(pp, "pp");
+ if (active.padNextWidth > 0) {
+ if (pp != null) {
+ pp = new PadPrinterParserDecorator(pp, active.padNextWidth, active.padNextChar);
+ }
+ active.padNextWidth = 0;
+ active.padNextChar = 0;
+ }
+ active.printerParsers.add(pp);
+ active.valueParserIndex = -1;
+ return active.printerParsers.size() - 1;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Completes this builder by creating the DateTimeFormatter using the default locale.
+ * <p>
+ * This will create a formatter with the {@link Locale#getDefault(Locale.Category) default FORMAT locale}.
+ * Numbers will be printed and parsed using the standard non-localized set of symbols.
+ * <p>
+ * Calling this method will end any open optional sections by repeatedly
+ * calling {@link #optionalEnd()} before creating the formatter.
+ * <p>
+ * This builder can still be used after creating the formatter if desired,
+ * although the state may have been changed by calls to {@code optionalEnd}.
+ *
+ * @return the created formatter, not null
+ */
+ public DateTimeFormatter toFormatter() {
+ return toFormatter(Locale.getDefault(Locale.Category.FORMAT));
+ }
+
+ /**
+ * Completes this builder by creating the DateTimeFormatter using the specified locale.
+ * <p>
+ * This will create a formatter with the specified locale.
+ * Numbers will be printed and parsed using the standard non-localized set of symbols.
+ * <p>
+ * Calling this method will end any open optional sections by repeatedly
+ * calling {@link #optionalEnd()} before creating the formatter.
+ * <p>
+ * This builder can still be used after creating the formatter if desired,
+ * although the state may have been changed by calls to {@code optionalEnd}.
+ *
+ * @param locale the locale to use for formatting, not null
+ * @return the created formatter, not null
+ */
+ public DateTimeFormatter toFormatter(Locale locale) {
+ Objects.requireNonNull(locale, "locale");
+ while (active.parent != null) {
+ optionalEnd();
+ }
+ CompositePrinterParser pp = new CompositePrinterParser(printerParsers, false);
+ return new DateTimeFormatter(pp, locale, DateTimeFormatSymbols.STANDARD, null, null);
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Strategy for printing/parsing date-time information.
+ * <p>
+ * The printer may print any part, or the whole, of the input date-time object.
+ * Typically, a complete print is constructed from a number of smaller
+ * units, each outputting a single field.
+ * <p>
+ * The parser may parse any piece of text from the input, storing the result
+ * in the context. Typically, each individual parser will just parse one
+ * field, such as the day-of-month, storing the value in the context.
+ * Once the parse is complete, the caller will then convert the context
+ * to a {@link DateTimeBuilder} to merge the parsed values to create the
+ * desired object, such as a {@code LocalDate}.
+ * <p>
+ * The parse position will be updated during the parse. Parsing will start at
+ * the specified index and the return value specifies the new parse position
+ * for the next parser. If an error occurs, the returned index will be negative
+ * and will have the error position encoded using the complement operator.
+ *
+ * <h3>Specification for implementors</h3>
+ * This interface must be implemented with care to ensure other classes operate correctly.
+ * All implementations that can be instantiated must be final, immutable and thread-safe.
+ * <p>
+ * The context is not a thread-safe object and a new instance will be created
+ * for each print that occurs. The context must not be stored in an instance
+ * variable or shared with any other threads.
+ */
+ interface DateTimePrinterParser {
+
+ /**
+ * Prints the date-time object to the buffer.
+ * <p>
+ * The context holds information to use during the print.
+ * It also contains the date-time information to be printed.
+ * <p>
+ * The buffer must not be mutated beyond the content controlled by the implementation.
+ *
+ * @param context the context to print using, not null
+ * @param buf the buffer to append to, not null
+ * @return false if unable to query the value from the date-time, true otherwise
+ * @throws DateTimeException if the date-time cannot be printed successfully
+ */
+ boolean print(DateTimePrintContext context, StringBuilder buf);
+
+ /**
+ * Parses text into date-time information.
+ * <p>
+ * The context holds information to use during the parse.
+ * It is also used to store the parsed date-time information.
+ *
+ * @param context the context to use and parse into, not null
+ * @param text the input text to parse, not null
+ * @param position the position to start parsing at, from 0 to the text length
+ * @return the new parse position, where negative means an error with the
+ * error position encoded using the complement ~ operator
+ * @throws NullPointerException if the context or text is null
+ * @throws IndexOutOfBoundsException if the position is invalid
+ */
+ int parse(DateTimeParseContext context, CharSequence text, int position);
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Composite printer and parser.
+ */
+ static final class CompositePrinterParser implements DateTimePrinterParser {
+ private final DateTimePrinterParser[] printerParsers;
+ private final boolean optional;
+
+ CompositePrinterParser(List<DateTimePrinterParser> printerParsers, boolean optional) {
+ this(printerParsers.toArray(new DateTimePrinterParser[printerParsers.size()]), optional);
+ }
+
+ CompositePrinterParser(DateTimePrinterParser[] printerParsers, boolean optional) {
+ this.printerParsers = printerParsers;
+ this.optional = optional;
+ }
+
+ /**
+ * Returns a copy of this printer-parser with the optional flag changed.
+ *
+ * @param optional the optional flag to set in the copy
+ * @return the new printer-parser, not null
+ */
+ public CompositePrinterParser withOptional(boolean optional) {
+ if (optional == this.optional) {
+ return this;
+ }
+ return new CompositePrinterParser(printerParsers, optional);
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ int length = buf.length();
+ if (optional) {
+ context.startOptional();
+ }
+ try {
+ for (DateTimePrinterParser pp : printerParsers) {
+ if (pp.print(context, buf) == false) {
+ buf.setLength(length); // reset buffer
+ return true;
+ }
+ }
+ } finally {
+ if (optional) {
+ context.endOptional();
+ }
+ }
+ return true;
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ if (optional) {
+ context.startOptional();
+ int pos = position;
+ for (DateTimePrinterParser pp : printerParsers) {
+ pos = pp.parse(context, text, pos);
+ if (pos < 0) {
+ context.endOptional(false);
+ return position; // return original position
+ }
+ }
+ context.endOptional(true);
+ return pos;
+ } else {
+ for (DateTimePrinterParser pp : printerParsers) {
+ position = pp.parse(context, text, position);
+ if (position < 0) {
+ break;
+ }
+ }
+ return position;
+ }
+ }
+
+ @Override
+ public String toString() {
+ StringBuilder buf = new StringBuilder();
+ if (printerParsers != null) {
+ buf.append(optional ? "[" : "(");
+ for (DateTimePrinterParser pp : printerParsers) {
+ buf.append(pp);
+ }
+ buf.append(optional ? "]" : ")");
+ }
+ return buf.toString();
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Pads the output to a fixed width.
+ */
+ static final class PadPrinterParserDecorator implements DateTimePrinterParser {
+ private final DateTimePrinterParser printerParser;
+ private final int padWidth;
+ private final char padChar;
+
+ /**
+ * Constructor.
+ *
+ * @param printerParser the printer, not null
+ * @param padWidth the width to pad to, 1 or greater
+ * @param padChar the pad character
+ */
+ PadPrinterParserDecorator(DateTimePrinterParser printerParser, int padWidth, char padChar) {
+ // input checked by DateTimeFormatterBuilder
+ this.printerParser = printerParser;
+ this.padWidth = padWidth;
+ this.padChar = padChar;
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ int preLen = buf.length();
+ if (printerParser.print(context, buf) == false) {
+ return false;
+ }
+ int len = buf.length() - preLen;
+ if (len > padWidth) {
+ throw new DateTimePrintException(
+ "Cannot print as output of " + len + " characters exceeds pad width of " + padWidth);
+ }
+ for (int i = 0; i < padWidth - len; i++) {
+ buf.insert(preLen, padChar);
+ }
+ return true;
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ if (position > text.length()) {
+ throw new IndexOutOfBoundsException();
+ }
+ int endPos = position + padWidth;
+ if (endPos > text.length()) {
+ return ~position; // not enough characters in the string to meet the parse width
+ }
+ int pos = position;
+ while (pos < endPos && text.charAt(pos) == padChar) {
+ pos++;
+ }
+ text = text.subSequence(0, endPos);
+ int firstError = 0;
+ while (pos >= position) {
+ int resultPos = printerParser.parse(context, text, pos);
+ if (resultPos < 0) {
+ // parse of decorated field had an error
+ if (firstError == 0) {
+ firstError = resultPos;
+ }
+ // loop around in case the decorated parser can handle the padChar at the start
+ pos--;
+ continue;
+ }
+ if (resultPos != endPos) {
+ return ~position; // parse of decorated field didn't parse to the end
+ }
+ return resultPos;
+ }
+ // loop runs at least once, so firstError must be set by the time we get here
+ return firstError; // return error from first parse of decorated field
+ }
+
+ @Override
+ public String toString() {
+ return "Pad(" + printerParser + "," + padWidth + (padChar == ' ' ? ")" : ",'" + padChar + "')");
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Enumeration to apply simple parse settings.
+ */
+ static enum SettingsParser implements DateTimePrinterParser {
+ SENSITIVE,
+ INSENSITIVE,
+ STRICT,
+ LENIENT;
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ return true; // nothing to do here
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ // using ordinals to avoid javac synthetic inner class
+ switch (ordinal()) {
+ case 0: context.setCaseSensitive(true); break;
+ case 1: context.setCaseSensitive(false); break;
+ case 2: context.setStrict(true); break;
+ case 3: context.setStrict(false); break;
+ }
+ return position;
+ }
+
+ @Override
+ public String toString() {
+ // using ordinals to avoid javac synthetic inner class
+ switch (ordinal()) {
+ case 0: return "ParseCaseSensitive(true)";
+ case 1: return "ParseCaseSensitive(false)";
+ case 2: return "ParseStrict(true)";
+ case 3: return "ParseStrict(false)";
+ }
+ throw new IllegalStateException("Unreachable");
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints or parses a character literal.
+ */
+ static final class CharLiteralPrinterParser implements DateTimePrinterParser {
+ private final char literal;
+
+ CharLiteralPrinterParser(char literal) {
+ this.literal = literal;
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ buf.append(literal);
+ return true;
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ int length = text.length();
+ if (position == length) {
+ return ~position;
+ }
+ char ch = text.charAt(position);
+ if (ch != literal) {
+ if (context.isCaseSensitive() ||
+ (Character.toUpperCase(ch) != Character.toUpperCase(literal) &&
+ Character.toLowerCase(ch) != Character.toLowerCase(literal))) {
+ return ~position;
+ }
+ }
+ return position + 1;
+ }
+
+ @Override
+ public String toString() {
+ if (literal == '\'') {
+ return "''";
+ }
+ return "'" + literal + "'";
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints or parses a string literal.
+ */
+ static final class StringLiteralPrinterParser implements DateTimePrinterParser {
+ private final String literal;
+
+ StringLiteralPrinterParser(String literal) {
+ this.literal = literal; // validated by caller
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ buf.append(literal);
+ return true;
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ int length = text.length();
+ if (position > length || position < 0) {
+ throw new IndexOutOfBoundsException();
+ }
+ if (context.subSequenceEquals(text, position, literal, 0, literal.length()) == false) {
+ return ~position;
+ }
+ return position + literal.length();
+ }
+
+ @Override
+ public String toString() {
+ String converted = literal.replace("'", "''");
+ return "'" + converted + "'";
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints and parses a numeric date-time field with optional padding.
+ */
+ static class NumberPrinterParser implements DateTimePrinterParser {
+
+ /**
+ * Array of 10 to the power of n.
+ */
+ static final int[] EXCEED_POINTS = new int[] {
+ 0,
+ 10,
+ 100,
+ 1000,
+ 10000,
+ 100000,
+ 1000000,
+ 10000000,
+ 100000000,
+ 1000000000,
+ };
+
+ final TemporalField field;
+ final int minWidth;
+ private final int maxWidth;
+ private final SignStyle signStyle;
+ private final int subsequentWidth;
+
+ /**
+ * Constructor.
+ *
+ * @param field the field to print, not null
+ * @param minWidth the minimum field width, from 1 to 19
+ * @param maxWidth the maximum field width, from minWidth to 19
+ * @param signStyle the positive/negative sign style, not null
+ */
+ NumberPrinterParser(TemporalField field, int minWidth, int maxWidth, SignStyle signStyle) {
+ // validated by caller
+ this.field = field;
+ this.minWidth = minWidth;
+ this.maxWidth = maxWidth;
+ this.signStyle = signStyle;
+ this.subsequentWidth = 0;
+ }
+
+ /**
+ * Constructor.
+ *
+ * @param field the field to print, not null
+ * @param minWidth the minimum field width, from 1 to 19
+ * @param maxWidth the maximum field width, from minWidth to 19
+ * @param signStyle the positive/negative sign style, not null
+ * @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater,
+ * -1 if fixed width due to active adjacent parsing
+ */
+ private NumberPrinterParser(TemporalField field, int minWidth, int maxWidth, SignStyle signStyle, int subsequentWidth) {
+ // validated by caller
+ this.field = field;
+ this.minWidth = minWidth;
+ this.maxWidth = maxWidth;
+ this.signStyle = signStyle;
+ this.subsequentWidth = subsequentWidth;
+ }
+
+ /**
+ * Returns a new instance with fixed width flag set.
+ *
+ * @return a new updated printer-parser, not null
+ */
+ NumberPrinterParser withFixedWidth() {
+ return new NumberPrinterParser(field, minWidth, maxWidth, signStyle, -1);
+ }
+
+ /**
+ * Returns a new instance with an updated subsequent width.
+ *
+ * @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater
+ * @return a new updated printer-parser, not null
+ */
+ NumberPrinterParser withSubsequentWidth(int subsequentWidth) {
+ return new NumberPrinterParser(field, minWidth, maxWidth, signStyle, this.subsequentWidth + subsequentWidth);
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ Long valueLong = context.getValue(field);
+ if (valueLong == null) {
+ return false;
+ }
+ long value = getValue(valueLong);
+ DateTimeFormatSymbols symbols = context.getSymbols();
+ String str = (value == Long.MIN_VALUE ? "9223372036854775808" : Long.toString(Math.abs(value)));
+ if (str.length() > maxWidth) {
+ throw new DateTimePrintException("Field " + field.getName() +
+ " cannot be printed as the value " + value +
+ " exceeds the maximum print width of " + maxWidth);
+ }
+ str = symbols.convertNumberToI18N(str);
+
+ if (value >= 0) {
+ switch (signStyle) {
+ case EXCEEDS_PAD:
+ if (minWidth < 19 && value >= EXCEED_POINTS[minWidth]) {
+ buf.append(symbols.getPositiveSign());
+ }
+ break;
+ case ALWAYS:
+ buf.append(symbols.getPositiveSign());
+ break;
+ }
+ } else {
+ switch (signStyle) {
+ case NORMAL:
+ case EXCEEDS_PAD:
+ case ALWAYS:
+ buf.append(symbols.getNegativeSign());
+ break;
+ case NOT_NEGATIVE:
+ throw new DateTimePrintException("Field " + field.getName() +
+ " cannot be printed as the value " + value +
+ " cannot be negative according to the SignStyle");
+ }
+ }
+ for (int i = 0; i < minWidth - str.length(); i++) {
+ buf.append(symbols.getZeroDigit());
+ }
+ buf.append(str);
+ return true;
+ }
+
+ /**
+ * Gets the value to output.
+ *
+ * @param value the base value of the field, not null
+ * @return the value
+ */
+ long getValue(long value) {
+ return value;
+ }
+
+ boolean isFixedWidth() {
+ return subsequentWidth == -1;
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ int length = text.length();
+ if (position == length) {
+ return ~position;
+ }
+ char sign = text.charAt(position); // IOOBE if invalid position
+ boolean negative = false;
+ boolean positive = false;
+ if (sign == context.getSymbols().getPositiveSign()) {
+ if (signStyle.parse(true, context.isStrict(), minWidth == maxWidth) == false) {
+ return ~position;
+ }
+ positive = true;
+ position++;
+ } else if (sign == context.getSymbols().getNegativeSign()) {
+ if (signStyle.parse(false, context.isStrict(), minWidth == maxWidth) == false) {
+ return ~position;
+ }
+ negative = true;
+ position++;
+ } else {
+ if (signStyle == SignStyle.ALWAYS && context.isStrict()) {
+ return ~position;
+ }
+ }
+ int effMinWidth = (context.isStrict() || isFixedWidth() ? minWidth : 1);
+ int minEndPos = position + effMinWidth;
+ if (minEndPos > length) {
+ return ~position;
+ }
+ int effMaxWidth = maxWidth + Math.max(subsequentWidth, 0);
+ long total = 0;
+ BigInteger totalBig = null;
+ int pos = position;
+ for (int pass = 0; pass < 2; pass++) {
+ int maxEndPos = Math.min(pos + effMaxWidth, length);
+ while (pos < maxEndPos) {
+ char ch = text.charAt(pos++);
+ int digit = context.getSymbols().convertToDigit(ch);
+ if (digit < 0) {
+ pos--;
+ if (pos < minEndPos) {
+ return ~position; // need at least min width digits
+ }
+ break;
+ }
+ if ((pos - position) > 18) {
+ if (totalBig == null) {
+ totalBig = BigInteger.valueOf(total);
+ }
+ totalBig = totalBig.multiply(BigInteger.TEN).add(BigInteger.valueOf(digit));
+ } else {
+ total = total * 10 + digit;
+ }
+ }
+ if (subsequentWidth > 0 && pass == 0) {
+ // re-parse now we know the correct width
+ int parseLen = pos - position;
+ effMaxWidth = Math.max(effMinWidth, parseLen - subsequentWidth);
+ pos = position;
+ total = 0;
+ totalBig = null;
+ } else {
+ break;
+ }
+ }
+ if (negative) {
+ if (totalBig != null) {
+ if (totalBig.equals(BigInteger.ZERO) && context.isStrict()) {
+ return ~(position - 1); // minus zero not allowed
+ }
+ totalBig = totalBig.negate();
+ } else {
+ if (total == 0 && context.isStrict()) {
+ return ~(position - 1); // minus zero not allowed
+ }
+ total = -total;
+ }
+ } else if (signStyle == SignStyle.EXCEEDS_PAD && context.isStrict()) {
+ int parseLen = pos - position;
+ if (positive) {
+ if (parseLen <= minWidth) {
+ return ~(position - 1); // '+' only parsed if minWidth exceeded
+ }
+ } else {
+ if (parseLen > minWidth) {
+ return ~position; // '+' must be parsed if minWidth exceeded
+ }
+ }
+ }
+ if (totalBig != null) {
+ if (totalBig.bitLength() > 63) {
+ // overflow, parse 1 less digit
+ totalBig = totalBig.divide(BigInteger.TEN);
+ pos--;
+ }
+ setValue(context, totalBig.longValue());
+ } else {
+ setValue(context, total);
+ }
+ return pos;
+ }
+
+ /**
+ * Stores the value.
+ *
+ * @param context the context to store into, not null
+ * @param value the value
+ */
+ void setValue(DateTimeParseContext context, long value) {
+ context.setParsedField(field, value);
+ }
+
+ @Override
+ public String toString() {
+ if (minWidth == 1 && maxWidth == 19 && signStyle == SignStyle.NORMAL) {
+ return "Value(" + field.getName() + ")";
+ }
+ if (minWidth == maxWidth && signStyle == SignStyle.NOT_NEGATIVE) {
+ return "Value(" + field.getName() + "," + minWidth + ")";
+ }
+ return "Value(" + field.getName() + "," + minWidth + "," + maxWidth + "," + signStyle + ")";
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints and parses a reduced numeric date-time field.
+ */
+ static final class ReducedPrinterParser extends NumberPrinterParser {
+ private final int baseValue;
+ private final int range;
+
+ /**
+ * Constructor.
+ *
+ * @param field the field to print, validated not null
+ * @param width the field width, from 1 to 18
+ * @param baseValue the base value
+ */
+ ReducedPrinterParser(TemporalField field, int width, int baseValue) {
+ super(field, width, width, SignStyle.NOT_NEGATIVE);
+ if (width < 1 || width > 18) {
+ throw new IllegalArgumentException("The width must be from 1 to 18 inclusive but was " + width);
+ }
+ if (field.range().isValidValue(baseValue) == false) {
+ throw new IllegalArgumentException("The base value must be within the range of the field");
+ }
+ this.baseValue = baseValue;
+ this.range = EXCEED_POINTS[width];
+ if ((((long) baseValue) + range) > Integer.MAX_VALUE) {
+ throw new DateTimeException("Unable to add printer-parser as the range exceeds the capacity of an int");
+ }
+ }
+
+ @Override
+ long getValue(long value) {
+ return Math.abs(value % range);
+ }
+
+ @Override
+ void setValue(DateTimeParseContext context, long value) {
+ int lastPart = baseValue % range;
+ if (baseValue > 0) {
+ value = baseValue - lastPart + value;
+ } else {
+ value = baseValue - lastPart - value;
+ }
+ if (value < baseValue) {
+ value += range;
+ }
+ context.setParsedField(field, value);
+ }
+
+ @Override
+ NumberPrinterParser withFixedWidth() {
+ return this;
+ }
+
+ @Override
+ boolean isFixedWidth() {
+ return true;
+ }
+
+ @Override
+ public String toString() {
+ return "ReducedValue(" + field.getName() + "," + minWidth + "," + baseValue + ")";
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints and parses a numeric date-time field with optional padding.
+ */
+ static final class FractionPrinterParser implements DateTimePrinterParser {
+ private final TemporalField field;
+ private final int minWidth;
+ private final int maxWidth;
+ private final boolean decimalPoint;
+
+ /**
+ * Constructor.
+ *
+ * @param field the field to output, not null
+ * @param minWidth the minimum width to output, from 0 to 9
+ * @param maxWidth the maximum width to output, from 0 to 9
+ * @param decimalPoint whether to output the localized decimal point symbol
+ */
+ FractionPrinterParser(TemporalField field, int minWidth, int maxWidth, boolean decimalPoint) {
+ Objects.requireNonNull(field, "field");
+ if (field.range().isFixed() == false) {
+ throw new IllegalArgumentException("Field must have a fixed set of values: " + field.getName());
+ }
+ if (minWidth < 0 || minWidth > 9) {
+ throw new IllegalArgumentException("Minimum width must be from 0 to 9 inclusive but was " + minWidth);
+ }
+ if (maxWidth < 1 || maxWidth > 9) {
+ throw new IllegalArgumentException("Maximum width must be from 1 to 9 inclusive but was " + maxWidth);
+ }
+ if (maxWidth < minWidth) {
+ throw new IllegalArgumentException("Maximum width must exceed or equal the minimum width but " +
+ maxWidth + " < " + minWidth);
+ }
+ this.field = field;
+ this.minWidth = minWidth;
+ this.maxWidth = maxWidth;
+ this.decimalPoint = decimalPoint;
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ Long value = context.getValue(field);
+ if (value == null) {
+ return false;
+ }
+ DateTimeFormatSymbols symbols = context.getSymbols();
+ BigDecimal fraction = convertToFraction(value);
+ if (fraction.scale() == 0) { // scale is zero if value is zero
+ if (minWidth > 0) {
+ if (decimalPoint) {
+ buf.append(symbols.getDecimalSeparator());
+ }
+ for (int i = 0; i < minWidth; i++) {
+ buf.append(symbols.getZeroDigit());
+ }
+ }
+ } else {
+ int outputScale = Math.min(Math.max(fraction.scale(), minWidth), maxWidth);
+ fraction = fraction.setScale(outputScale, RoundingMode.FLOOR);
+ String str = fraction.toPlainString().substring(2);
+ str = symbols.convertNumberToI18N(str);
+ if (decimalPoint) {
+ buf.append(symbols.getDecimalSeparator());
+ }
+ buf.append(str);
+ }
+ return true;
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ int effectiveMin = (context.isStrict() ? minWidth : 0);
+ int effectiveMax = (context.isStrict() ? maxWidth : 9);
+ int length = text.length();
+ if (position == length) {
+ // valid if whole field is optional, invalid if minimum width
+ return (effectiveMin > 0 ? ~position : position);
+ }
+ if (decimalPoint) {
+ if (text.charAt(position) != context.getSymbols().getDecimalSeparator()) {
+ // valid if whole field is optional, invalid if minimum width
+ return (effectiveMin > 0 ? ~position : position);
+ }
+ position++;
+ }
+ int minEndPos = position + effectiveMin;
+ if (minEndPos > length) {
+ return ~position; // need at least min width digits
+ }
+ int maxEndPos = Math.min(position + effectiveMax, length);
+ int total = 0; // can use int because we are only parsing up to 9 digits
+ int pos = position;
+ while (pos < maxEndPos) {
+ char ch = text.charAt(pos++);
+ int digit = context.getSymbols().convertToDigit(ch);
+ if (digit < 0) {
+ if (pos < minEndPos) {
+ return ~position; // need at least min width digits
+ }
+ pos--;
+ break;
+ }
+ total = total * 10 + digit;
+ }
+ BigDecimal fraction = new BigDecimal(total).movePointLeft(pos - position);
+ long value = convertFromFraction(fraction);
+ context.setParsedField(field, value);
+ return pos;
+ }
+
+ /**
+ * Converts a value for this field to a fraction between 0 and 1.
+ * <p>
+ * The fractional value is between 0 (inclusive) and 1 (exclusive).
+ * It can only be returned if the {@link java.time.temporal.TemporalField#range() value range} is fixed.
+ * The fraction is obtained by calculation from the field range using 9 decimal
+ * places and a rounding mode of {@link RoundingMode#FLOOR FLOOR}.
+ * The calculation is inaccurate if the values do not run continuously from smallest to largest.
+ * <p>
+ * For example, the second-of-minute value of 15 would be returned as 0.25,
+ * assuming the standard definition of 60 seconds in a minute.
+ *
+ * @param value the value to convert, must be valid for this rule
+ * @return the value as a fraction within the range, from 0 to 1, not null
+ * @throws DateTimeException if the value cannot be converted to a fraction
+ */
+ private BigDecimal convertToFraction(long value) {
+ ValueRange range = field.range();
+ range.checkValidValue(value, field);
+ BigDecimal minBD = BigDecimal.valueOf(range.getMinimum());
+ BigDecimal rangeBD = BigDecimal.valueOf(range.getMaximum()).subtract(minBD).add(BigDecimal.ONE);
+ BigDecimal valueBD = BigDecimal.valueOf(value).subtract(minBD);
+ BigDecimal fraction = valueBD.divide(rangeBD, 9, RoundingMode.FLOOR);
+ // stripTrailingZeros bug
+ return fraction.compareTo(BigDecimal.ZERO) == 0 ? BigDecimal.ZERO : fraction.stripTrailingZeros();
+ }
+
+ /**
+ * Converts a fraction from 0 to 1 for this field to a value.
+ * <p>
+ * The fractional value must be between 0 (inclusive) and 1 (exclusive).
+ * It can only be returned if the {@link java.time.temporal.TemporalField#range() value range} is fixed.
+ * The value is obtained by calculation from the field range and a rounding
+ * mode of {@link RoundingMode#FLOOR FLOOR}.
+ * The calculation is inaccurate if the values do not run continuously from smallest to largest.
+ * <p>
+ * For example, the fractional second-of-minute of 0.25 would be converted to 15,
+ * assuming the standard definition of 60 seconds in a minute.
+ *
+ * @param fraction the fraction to convert, not null
+ * @return the value of the field, valid for this rule
+ * @throws DateTimeException if the value cannot be converted
+ */
+ private long convertFromFraction(BigDecimal fraction) {
+ ValueRange range = field.range();
+ BigDecimal minBD = BigDecimal.valueOf(range.getMinimum());
+ BigDecimal rangeBD = BigDecimal.valueOf(range.getMaximum()).subtract(minBD).add(BigDecimal.ONE);
+ BigDecimal valueBD = fraction.multiply(rangeBD).setScale(0, RoundingMode.FLOOR).add(minBD);
+ return valueBD.longValueExact();
+ }
+
+ @Override
+ public String toString() {
+ String decimal = (decimalPoint ? ",DecimalPoint" : "");
+ return "Fraction(" + field.getName() + "," + minWidth + "," + maxWidth + decimal + ")";
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints or parses field text.
+ */
+ static final class TextPrinterParser implements DateTimePrinterParser {
+ private final TemporalField field;
+ private final TextStyle textStyle;
+ private final DateTimeTextProvider provider;
+ /**
+ * The cached number printer parser.
+ * Immutable and volatile, so no synchronization needed.
+ */
+ private volatile NumberPrinterParser numberPrinterParser;
+
+ /**
+ * Constructor.
+ *
+ * @param field the field to output, not null
+ * @param textStyle the text style, not null
+ * @param provider the text provider, not null
+ */
+ TextPrinterParser(TemporalField field, TextStyle textStyle, DateTimeTextProvider provider) {
+ // validated by caller
+ this.field = field;
+ this.textStyle = textStyle;
+ this.provider = provider;
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ Long value = context.getValue(field);
+ if (value == null) {
+ return false;
+ }
+ String text = null;
+ if (field == ChronoField.ERA) {
+ Chrono chrono = context.getTemporal().query(Queries.chrono());
+ if (chrono == null) {
+ chrono = ISOChrono.INSTANCE;
+ }
+ text = provider.getEraText(chrono, value, textStyle, context.getLocale());
+ } else {
+ text = provider.getText(field, value, textStyle, context.getLocale());
+ }
+ if (text == null) {
+ return numberPrinterParser().print(context, buf);
+ }
+ buf.append(text);
+ return true;
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence parseText, int position) {
+ int length = parseText.length();
+ if (position < 0 || position > length) {
+ throw new IndexOutOfBoundsException();
+ }
+ TextStyle style = (context.isStrict() ? textStyle : null);
+ Iterator<Entry<String, Long>> it = provider.getTextIterator(field, style, context.getLocale());
+ if (it != null) {
+ while (it.hasNext()) {
+ Entry<String, Long> entry = it.next();
+ String itText = entry.getKey();
+ if (context.subSequenceEquals(itText, 0, parseText, position, itText.length())) {
+ context.setParsedField(field, entry.getValue());
+ return position + itText.length();
+ }
+ }
+ if (context.isStrict()) {
+ return ~position;
+ }
+ }
+ return numberPrinterParser().parse(context, parseText, position);
+ }
+
+ /**
+ * Create and cache a number printer parser.
+ * @return the number printer parser for this field, not null
+ */
+ private NumberPrinterParser numberPrinterParser() {
+ if (numberPrinterParser == null) {
+ numberPrinterParser = new NumberPrinterParser(field, 1, 19, SignStyle.NORMAL);
+ }
+ return numberPrinterParser;
+ }
+
+ @Override
+ public String toString() {
+ if (textStyle == TextStyle.FULL) {
+ return "Text(" + field.getName() + ")";
+ }
+ return "Text(" + field.getName() + "," + textStyle + ")";
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints or parses an ISO-8601 instant.
+ */
+ static final class InstantPrinterParser implements DateTimePrinterParser {
+ // days in a 400 year cycle = 146097
+ // days in a 10,000 year cycle = 146097 * 25
+ // seconds per day = 86400
+ private static final long SECONDS_PER_10000_YEARS = 146097L * 25L * 86400L;
+ private static final long SECONDS_0000_TO_1970 = ((146097L * 5L) - (30L * 365L + 7L)) * 86400L;
+ private static final CompositePrinterParser PARSER = new DateTimeFormatterBuilder()
+ .parseCaseInsensitive()
+ .append(DateTimeFormatters.isoLocalDate()).appendLiteral('T')
+ .append(DateTimeFormatters.isoLocalTime()).appendLiteral('Z')
+ .toFormatter().toPrinterParser(false);
+
+ InstantPrinterParser() {
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ // use INSTANT_SECONDS, thus this code is not bound by Instant.MAX
+ Long inSecs = context.getValue(INSTANT_SECONDS);
+ Long inNanos = context.getValue(NANO_OF_SECOND);
+ if (inSecs == null || inNanos == null) {
+ return false;
+ }
+ long inSec = inSecs;
+ int inNano = NANO_OF_SECOND.checkValidIntValue(inNanos);
+ if (inSec >= -SECONDS_0000_TO_1970) {
+ // current era
+ long zeroSecs = inSec - SECONDS_PER_10000_YEARS + SECONDS_0000_TO_1970;
+ long hi = Math.floorDiv(zeroSecs, SECONDS_PER_10000_YEARS) + 1;
+ long lo = Math.floorMod(zeroSecs, SECONDS_PER_10000_YEARS);
+ LocalDateTime ldt = LocalDateTime.ofEpochSecond(lo - SECONDS_0000_TO_1970, inNano, ZoneOffset.UTC);
+ if (hi > 0) {
+ buf.append('+').append(hi);
+ }
+ buf.append(ldt).append('Z');
+ } else {
+ // before current era
+ long zeroSecs = inSec + SECONDS_0000_TO_1970;
+ long hi = zeroSecs / SECONDS_PER_10000_YEARS;
+ long lo = zeroSecs % SECONDS_PER_10000_YEARS;
+ LocalDateTime ldt = LocalDateTime.ofEpochSecond(lo - SECONDS_0000_TO_1970, inNano, ZoneOffset.UTC);
+ int pos = buf.length();
+ buf.append(ldt).append('Z');
+ if (hi < 0) {
+ if (ldt.getYear() == -10_000) {
+ buf.replace(pos, pos + 2, Long.toString(hi - 1));
+ } else if (lo == 0) {
+ buf.insert(pos, hi);
+ } else {
+ buf.insert(pos + 1, Math.abs(hi));
+ }
+ }
+ }
+ return true;
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ // new context to avoid overwriting fields like year/month/day
+ DateTimeParseContext newContext = context.copy();
+ int pos = PARSER.parse(newContext, text, position);
+ if (pos < 0) {
+ return pos;
+ }
+ // parser restricts most fields to 2 digits, so definitely int
+ // correctly parsed nano is also guaranteed to be valid
+ long yearParsed = newContext.getParsed(YEAR);
+ int month = newContext.getParsed(MONTH_OF_YEAR).intValue();
+ int day = newContext.getParsed(DAY_OF_MONTH).intValue();
+ int hour = newContext.getParsed(HOUR_OF_DAY).intValue();
+ int min = newContext.getParsed(MINUTE_OF_HOUR).intValue();
+ Long secVal = newContext.getParsed(SECOND_OF_MINUTE);
+ Long nanoVal = newContext.getParsed(NANO_OF_SECOND);
+ int sec = (secVal != null ? secVal.intValue() : 0);
+ int nano = (nanoVal != null ? nanoVal.intValue() : 0);
+ int year = (int) yearParsed % 10_000;
+ long instantSecs;
+ try {
+ LocalDateTime ldt = LocalDateTime.of(year, month, day, hour, min, sec, 0);
+ instantSecs = ldt.toEpochSecond(ZoneOffset.UTC);
+ instantSecs += Math.multiplyExact(yearParsed / 10_000L, SECONDS_PER_10000_YEARS);
+ } catch (RuntimeException ex) {
+ return ~position;
+ }
+ context.setParsedField(INSTANT_SECONDS, instantSecs);
+ context.setParsedField(NANO_OF_SECOND, nano);
+ return text.length();
+ }
+
+ @Override
+ public String toString() {
+ return "Instant()";
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints or parses an offset ID.
+ */
+ static final class OffsetIdPrinterParser implements DateTimePrinterParser {
+ static final String[] PATTERNS = new String[] {
+ "+HH", "+HHMM", "+HH:MM", "+HHMMss", "+HH:MM:ss", "+HHMMSS", "+HH:MM:SS",
+ }; // order used in pattern builder
+ static final OffsetIdPrinterParser INSTANCE_ID = new OffsetIdPrinterParser("Z", "+HH:MM:ss");
+
+ private final String noOffsetText;
+ private final int type;
+
+ /**
+ * Constructor.
+ *
+ * @param noOffsetText the text to use for UTC, not null
+ * @param pattern the pattern
+ */
+ OffsetIdPrinterParser(String noOffsetText, String pattern) {
+ Objects.requireNonNull(noOffsetText, "noOffsetText");
+ Objects.requireNonNull(pattern, "pattern");
+ this.noOffsetText = noOffsetText;
+ this.type = checkPattern(pattern);
+ }
+
+ private int checkPattern(String pattern) {
+ for (int i = 0; i < PATTERNS.length; i++) {
+ if (PATTERNS[i].equals(pattern)) {
+ return i;
+ }
+ }
+ throw new IllegalArgumentException("Invalid zone offset pattern: " + pattern);
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ Long offsetSecs = context.getValue(OFFSET_SECONDS);
+ if (offsetSecs == null) {
+ return false;
+ }
+ int totalSecs = Math.toIntExact(offsetSecs);
+ if (totalSecs == 0) {
+ buf.append(noOffsetText);
+ } else {
+ int absHours = Math.abs((totalSecs / 3600) % 100); // anything larger than 99 silently dropped
+ int absMinutes = Math.abs((totalSecs / 60) % 60);
+ int absSeconds = Math.abs(totalSecs % 60);
+ buf.append(totalSecs < 0 ? "-" : "+")
+ .append((char) (absHours / 10 + '0')).append((char) (absHours % 10 + '0'));
+ if (type >= 1) {
+ buf.append((type % 2) == 0 ? ":" : "")
+ .append((char) (absMinutes / 10 + '0')).append((char) (absMinutes % 10 + '0'));
+ if (type >= 5 || (type >= 3 && absSeconds > 0)) {
+ buf.append((type % 2) == 0 ? ":" : "")
+ .append((char) (absSeconds / 10 + '0')).append((char) (absSeconds % 10 + '0'));
+ }
+ }
+ }
+ return true;
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ int length = text.length();
+ int noOffsetLen = noOffsetText.length();
+ if (noOffsetLen == 0) {
+ if (position == length) {
+ context.setParsedField(OFFSET_SECONDS, 0);
+ return position;
+ }
+ } else {
+ if (position == length) {
+ return ~position;
+ }
+ if (context.subSequenceEquals(text, position, noOffsetText, 0, noOffsetLen)) {
+ context.setParsedField(OFFSET_SECONDS, 0);
+ return position + noOffsetLen;
+ }
+ }
+
+ // parse normal plus/minus offset
+ char sign = text.charAt(position); // IOOBE if invalid position
+ if (sign == '+' || sign == '-') {
+ // starts
+ int negative = (sign == '-' ? -1 : 1);
+ int[] array = new int[4];
+ array[0] = position + 1;
+ if (parseNumber(array, 1, text, true) ||
+ parseNumber(array, 2, text, type > 0) ||
+ parseNumber(array, 3, text, false)) {
+ return ~position;
+ }
+ long offsetSecs = negative * (array[1] * 3600L + array[2] * 60L + array[3]);
+ context.setParsedField(OFFSET_SECONDS, offsetSecs);
+ return array[0];
+ } else {
+ // handle special case of empty no offset text
+ if (noOffsetLen == 0) {
+ context.setParsedField(OFFSET_SECONDS, 0);
+ return position + noOffsetLen;
+ }
+ return ~position;
+ }
+ }
+
+ /**
+ * Parse a two digit zero-prefixed number.
+ *
+ * @param array the array of parsed data, 0=pos,1=hours,2=mins,3=secs, not null
+ * @param arrayIndex the index to parse the value into
+ * @param parseText the offset ID, not null
+ * @param required whether this number is required
+ * @return true if an error occurred
+ */
+ private boolean parseNumber(int[] array, int arrayIndex, CharSequence parseText, boolean required) {
+ if ((type + 3) / 2 < arrayIndex) {
+ return false; // ignore seconds/minutes
+ }
+ int pos = array[0];
+ if ((type % 2) == 0 && arrayIndex > 1) {
+ if (pos + 1 > parseText.length() || parseText.charAt(pos) != ':') {
+ return required;
+ }
+ pos++;
+ }
+ if (pos + 2 > parseText.length()) {
+ return required;
+ }
+ char ch1 = parseText.charAt(pos++);
+ char ch2 = parseText.charAt(pos++);
+ if (ch1 < '0' || ch1 > '9' || ch2 < '0' || ch2 > '9') {
+ return required;
+ }
+ int value = (ch1 - 48) * 10 + (ch2 - 48);
+ if (value < 0 || value > 59) {
+ return required;
+ }
+ array[arrayIndex] = value;
+ array[0] = pos;
+ return false;
+ }
+
+ @Override
+ public String toString() {
+ String converted = noOffsetText.replace("'", "''");
+ return "Offset('" + converted + "'," + PATTERNS[type] + ")";
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints or parses a zone ID.
+ */
+ static final class ZoneTextPrinterParser implements DateTimePrinterParser {
+
+ /** The text style to output. */
+ private final TextStyle textStyle;
+
+ ZoneTextPrinterParser(TextStyle textStyle) {
+ this.textStyle = Objects.requireNonNull(textStyle, "textStyle");
+ }
+
+ private static final int STD = 0;
+ private static final int DST = 1;
+ private static final int GENERIC = 2;
+
+ private static final Map<String, SoftReference<Map<Locale, String[]>>> cache =
+ new ConcurrentHashMap<>();
+
+ private static String getDisplayName(String id, int type, TextStyle style, Locale locale) {
+ if (style == TextStyle.NARROW) {
+ return null;
+ }
+ String[] names;
+ SoftReference<Map<Locale, String[]>> ref = cache.get(id);
+ Map<Locale, String[]> perLocale;
+ if (ref == null || (perLocale = ref.get()) == null ||
+ (names = perLocale.get(locale)) == null) {
+ names = TimeZoneNameUtility.retrieveDisplayNames(id, locale);
+ if (names == null) {
+ return null;
+ }
+ names = Arrays.copyOfRange(names, 0, 7);
+ names[5] =
+ TimeZoneNameUtility.retrieveGenericDisplayName(id, TimeZone.LONG,locale);
+ if (names[5] == null) {
+ names[5] = names[0]; // use the id
+ }
+ names[6] =
+ TimeZoneNameUtility.retrieveGenericDisplayName(id, TimeZone.SHORT,locale);
+ if (names[6] == null) {
+ names[6] = names[0];
+ }
+ perLocale = new ConcurrentHashMap<>();
+ perLocale.put(locale, names);
+ ref = new SoftReference<>(perLocale);
+ cache.put(id, ref);
+ }
+ switch (type) {
+ case STD:
+ return names[style.ordinal() + 1];
+ case DST:
+ return names[style.ordinal() + 3];
+ }
+ return names[style.ordinal() + 5];
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ ZoneId zone = context.getValue(Queries.zoneId());
+ if (zone == null) {
+ return false;
+ }
+ if (zone instanceof ZoneOffset) {
+ buf.append(zone.getId());
+ } else {
+ TemporalAccessor dt = context.getTemporal();
+ Instant instant = null;
+ if (dt.isSupported(ChronoField.INSTANT_SECONDS)) {
+ instant = Instant.from(dt);
+ }
+ String name = getDisplayName(zone.getId(),
+ instant == null ? GENERIC
+ : (zone.getRules().isDaylightSavings(instant) ? DST : STD),
+ textStyle, context.getLocale());
+ if (name != null) {
+ buf.append(name);
+ } else {
+ buf.append(zone.getId());
+ }
+ }
+ return true;
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public String toString() {
+ return "ZoneText(" + textStyle + ")";
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints or parses a zone ID.
+ */
+ static final class ZoneIdPrinterParser implements DateTimePrinterParser {
+ private final TemporalQuery<ZoneId> query;
+ private final String description;
+
+ ZoneIdPrinterParser(TemporalQuery<ZoneId> query, String description) {
+ this.query = query;
+ this.description = description;
+ }
+
+ //-----------------------------------------------------------------------
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ ZoneId zone = context.getValue(query);
+ if (zone == null) {
+ return false;
+ }
+ buf.append(zone.getId());
+ return true;
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * The cached tree to speed up parsing.
+ */
+ private static volatile Entry<Integer, PrefixTree> cachedPrefixTree;
+ private static volatile Entry<Integer, PrefixTree> cachedPrefixTreeCI;
+
+ /**
+ * This implementation looks for the longest matching string.
+ * For example, parsing Etc/GMT-2 will return Etc/GMC-2 rather than just
+ * Etc/GMC although both are valid.
+ */
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ int length = text.length();
+ if (position > length) {
+ throw new IndexOutOfBoundsException();
+ }
+
+ // handle fixed time-zone IDs
+ if ((text.length() - position) >= 1) {
+ char nextChar = text.charAt(position);
+ if (nextChar == '+' || nextChar == '-') {
+ DateTimeParseContext newContext = context.copy();
+ int endPos = OffsetIdPrinterParser.INSTANCE_ID.parse(newContext, text, position);
+ if (endPos < 0) {
+ return endPos;
+ }
+ int offset = (int) (long) newContext.getParsed(OFFSET_SECONDS);
+ ZoneId zone = ZoneOffset.ofTotalSeconds(offset);
+ context.setParsed(zone);
+ return endPos;
+ }
+ }
+
+ // prepare parse tree
+ Set<String> regionIds = ZoneRulesProvider.getAvailableZoneIds();
+ final int regionIdsSize = regionIds.size();
+ Entry<Integer, PrefixTree> cached = context.isCaseSensitive()
+ ? cachedPrefixTree : cachedPrefixTreeCI;
+ if (cached == null || cached.getKey() != regionIdsSize) {
+ synchronized (this) {
+ cached = context.isCaseSensitive() ? cachedPrefixTree : cachedPrefixTreeCI;
+ if (cached == null || cached.getKey() != regionIdsSize) {
+ cached = new SimpleImmutableEntry<>(regionIdsSize,
+ PrefixTree.newTree(regionIds, context.isCaseSensitive()
+ ? PrefixTree.STRICT : PrefixTree.CASE_INSENSITIVE));
+ if (context.isCaseSensitive()) {
+ cachedPrefixTree = cached;
+ } else {
+ cachedPrefixTreeCI = cached;
+ }
+ }
+ }
+ }
+ PrefixTree tree = cached.getValue();
+
+ // parse
+ String parsedZoneId = tree.match(text, position, length);
+ if (parsedZoneId == null || regionIds.contains(parsedZoneId) == false) {
+ if (text.charAt(position) == 'Z') {
+ context.setParsed(ZoneOffset.UTC);
+ return position + 1;
+ }
+ return ~position;
+ }
+ context.setParsed(ZoneId.of(parsedZoneId));
+ return position + parsedZoneId.length();
+ }
+
+
+ @Override
+ public String toString() {
+ return description;
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * A String based prefix tree for parsing time-zone names.
+ */
+ static class PrefixTree {
+ protected String key;
+ protected String value;
+ protected char c0; // performance optimization to avoid the
+ // boundary check cost of key.charat(0)
+ protected PrefixTree child;
+ protected PrefixTree sibling;
+
+ static final int STRICT = 1;
+ static final int CASE_INSENSITIVE = 2;
+ static final int LENIENT = 3;
+
+ private PrefixTree(String k, String v, PrefixTree child) {
+ this.key = k;
+ this.value = v;
+ this.child = child;
+ if (k.length() == 0){
+ c0 = 0xffff;
+ } else {
+ c0 = key.charAt(0);
+ }
+ }
+
+ /**
+ * Creates a new prefix parsing tree.
+ *
+ * @param type the type of the prefix tree. One of the three supported
+ * types, STRICT, CASE_INSENSITIVE and LENIENT
+ * @return the tree, not null
+ */
+ public static PrefixTree newTree(int type) {
+ PrefixTree tree;
+ switch(type) {
+ case STRICT:
+ tree = new PrefixTree("", null, null);
+ break;
+ case CASE_INSENSITIVE:
+ tree = new CI("", null, null);
+ break;
+ case LENIENT:
+ tree = new LENIENT("", null, null);
+ break;
+ default:
+ throw new IllegalArgumentException("Unknown type");
+ }
+ return tree;
+ }
+
+ /**
+ * Creates a new prefix parsing tree.
+ *
+ * @param keys a set of strings to build the prefix parsing tree, not null
+ * @param type the type of the prefix tree. One of the three supported
+ * types, STRICT, CASE_INSENSITIVE and LENIENT
+ * @return the tree, not null
+ */
+ public static PrefixTree newTree(Set<String> keys, int type) {
+ PrefixTree tree = newTree(type);
+ for (String k : keys) {
+ tree.add0(k, k);
+ }
+ return tree;
+ }
+
+ /**
+ * Adds a pair of {key, value} into the prefix tree.
+ *
+ * @param k the key, not null
+ * @param v the value, not null
+ * @return true if the pair is added successfully
+ */
+ public boolean add(String k, String v) {
+ return add0(k, v);
+ }
+
+ private boolean add0(String k, String v) {
+ k = toKey(k);
+ int prefixLen = prefixLength(k);
+ if (prefixLen == key.length()) {
+ if (prefixLen < k.length()) { // down the tree
+ String subKey = k.substring(prefixLen);
+ PrefixTree c = child;
+ while (c != null) {
+ if (isEqual(c.c0, subKey.charAt(0))) {
+ return c.add0(subKey, v);
+ }
+ c = c.sibling;
+ }
+ // add the node as the child of the current node
+ c = newNode(subKey, v, null);
+ c.sibling = child;
+ child = c;
+ return true;
+ }
+ // have an existing <key, value> already, keep it.
+ if (value != null) {
+ return false;
+ }
+ value = v;
+ return true;
+ }
+ // split the existing node
+ PrefixTree n1 = newNode(key.substring(prefixLen), value, child);
+ key = k.substring(0, prefixLen);
+ child = n1;
+ if (prefixLen < k.length()) {
+ PrefixTree n2 = newNode(k.substring(prefixLen), v, null);
+ child.sibling = n2;
+ value = null;
+ } else {
+ value = v;
+ }
+ return true;
+ }
+
+ /**
+ * Match text with the prefix tree.
+ *
+ * @param text the input text to parse, not null
+ * @param off the offset position to start parsing at
+ * @param end the end position to stop parsing
+ * @return the resulting string, or null if no match found.
+ */
+ public String match(CharSequence text, int off, int end) {
+ if (!prefixOf(text, off, end)){
+ return null;
+ }
+ if (child != null && (off += key.length()) != end) {
+ PrefixTree c = child;
+ do {
+ if (isEqual(c.c0, text.charAt(off))) {
+ String found = c.match(text, off, end);
+ if (found != null) {
+ return found;
+ }
+ return value;
+ }
+ c = c.sibling;
+ } while (c != null);
+ }
+ return value;
+ }
+
+ /**
+ * Match text with the prefix tree.
+ *
+ * @param text the input text to parse, not null
+ * @param pos the position to start parsing at, from 0 to the text
+ * length. Upon return, position will be updated to the new parse
+ * position, or unchanged, if no match found.
+ * @return the resulting string, or null if no match found.
+ */
+ public String match(CharSequence text, ParsePosition pos) {
+ int off = pos.getIndex();
+ int end = text.length();
+ if (!prefixOf(text, off, end)){
+ return null;
+ }
+ off += key.length();
+ if (child != null && off != end) {
+ PrefixTree c = child;
+ do {
+ if (isEqual(c.c0, text.charAt(off))) {
+ pos.setIndex(off);
+ String found = c.match(text, pos);
+ if (found != null) {
+ return found;
+ }
+ break;
+ }
+ c = c.sibling;
+ } while (c != null);
+ }
+ pos.setIndex(off);
+ return value;
+ }
+
+ protected String toKey(String k) {
+ return k;
+ }
+
+ protected PrefixTree newNode(String k, String v, PrefixTree child) {
+ return new PrefixTree(k, v, child);
+ }
+
+ protected boolean isEqual(char c1, char c2) {
+ return c1 == c2;
+ }
+
+ protected boolean prefixOf(CharSequence text, int off, int end) {
+ if (text instanceof String) {
+ return ((String)text).startsWith(key, off);
+ }
+ int len = key.length();
+ if (len > end - off) {
+ return false;
+ }
+ int off0 = 0;
+ while (len-- > 0) {
+ if (!isEqual(key.charAt(off0++), text.charAt(off++))) {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ private int prefixLength(String k) {
+ int off = 0;
+ while (off < k.length() && off < key.length()) {
+ if (!isEqual(k.charAt(off), key.charAt(off))) {
+ return off;
+ }
+ off++;
+ }
+ return off;
+ }
+
+ /**
+ * Case Insensitive prefix tree.
+ */
+ private static class CI extends PrefixTree {
+
+ private CI(String k, String v, PrefixTree child) {
+ super(k, v, child);
+ }
+
+ @Override
+ protected CI newNode(String k, String v, PrefixTree child) {
+ return new CI(k, v, child);
+ }
+
+ @Override
+ protected boolean isEqual(char c1, char c2) {
+ return c1 == c2 ||
+ Character.toUpperCase(c1) == Character.toUpperCase(c2) ||
+ Character.toLowerCase(c1) == Character.toLowerCase(c2);
+ }
+
+ @Override
+ protected boolean prefixOf(CharSequence text, int off, int end) {
+ int len = key.length();
+ if (len > end - off) {
+ return false;
+ }
+ int off0 = 0;
+ while (len-- > 0) {
+ if (!isEqual(key.charAt(off0++), text.charAt(off++))) {
+ return false;
+ }
+ }
+ return true;
+ }
+ }
+
+ /**
+ * Lenient prefix tree. Case insensitive and ignores characters
+ * like space, underscore and slash.
+ */
+ private static class LENIENT extends CI {
+
+ private LENIENT(String k, String v, PrefixTree child) {
+ super(k, v, child);
+ }
+
+ @Override
+ protected CI newNode(String k, String v, PrefixTree child) {
+ return new LENIENT(k, v, child);
+ }
+
+ private boolean isLenientChar(char c) {
+ return c == ' ' || c == '_' || c == '/';
+ }
+
+ protected String toKey(String k) {
+ for (int i = 0; i < k.length(); i++) {
+ if (isLenientChar(k.charAt(i))) {
+ StringBuilder sb = new StringBuilder(k.length());
+ sb.append(k, 0, i);
+ i++;
+ while (i < k.length()) {
+ if (!isLenientChar(k.charAt(i))) {
+ sb.append(k.charAt(i));
+ }
+ i++;
+ }
+ return sb.toString();
+ }
+ }
+ return k;
+ }
+
+ @Override
+ public String match(CharSequence text, ParsePosition pos) {
+ int off = pos.getIndex();
+ int end = text.length();
+ int len = key.length();
+ int koff = 0;
+ while (koff < len && off < end) {
+ if (isLenientChar(text.charAt(off))) {
+ off++;
+ continue;
+ }
+ if (!isEqual(key.charAt(koff++), text.charAt(off++))) {
+ return null;
+ }
+ }
+ if (koff != len) {
+ return null;
+ }
+ if (child != null && off != end) {
+ int off0 = off;
+ while (off0 < end && isLenientChar(text.charAt(off0))) {
+ off0++;
+ }
+ if (off0 < end) {
+ PrefixTree c = child;
+ do {
+ if (isEqual(c.c0, text.charAt(off0))) {
+ pos.setIndex(off0);
+ String found = c.match(text, pos);
+ if (found != null) {
+ return found;
+ }
+ break;
+ }
+ c = c.sibling;
+ } while (c != null);
+ }
+ }
+ pos.setIndex(off);
+ return value;
+ }
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints or parses a chronology.
+ */
+ static final class ChronoPrinterParser implements DateTimePrinterParser {
+ /** The text style to output, null means the ID. */
+ private final TextStyle textStyle;
+
+ ChronoPrinterParser(TextStyle textStyle) {
+ // validated by caller
+ this.textStyle = textStyle;
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ Chrono<?> chrono = context.getValue(Queries.chrono());
+ if (chrono == null) {
+ return false;
+ }
+ if (textStyle == null) {
+ buf.append(chrono.getId());
+ } else {
+ buf.append(chrono.getId()); // TODO: Use symbols
+ }
+ return true;
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ return ~position; // TODO, including case insensitive
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints or parses a localized pattern.
+ */
+ static final class LocalizedPrinterParser implements DateTimePrinterParser {
+ private final FormatStyle dateStyle;
+ private final FormatStyle timeStyle;
+ private final Chrono<?> chrono;
+
+ /**
+ * Constructor.
+ *
+ * @param dateStyle the date style to use, may be null
+ * @param timeStyle the time style to use, may be null
+ * @param chrono the chronology to use, not null
+ */
+ LocalizedPrinterParser(FormatStyle dateStyle, FormatStyle timeStyle, Chrono<?> chrono) {
+ // validated by caller
+ this.dateStyle = dateStyle;
+ this.timeStyle = timeStyle;
+ this.chrono = chrono;
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ return formatter(context.getLocale()).toPrinterParser(false).print(context, buf);
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ return formatter(context.getLocale()).toPrinterParser(false).parse(context, text, position);
+ }
+
+ /**
+ * Gets the formatter to use.
+ *
+ * @param locale the locale to use, not null
+ * @return the formatter, not null
+ * @throws IllegalArgumentException if the formatter cannot be found
+ */
+ private DateTimeFormatter formatter(Locale locale) {
+ return DateTimeFormatStyleProvider.getInstance()
+ .getFormatter(dateStyle, timeStyle, chrono, locale);
+ }
+
+ @Override
+ public String toString() {
+ return "Localized(" + (dateStyle != null ? dateStyle : "") + "," +
+ (timeStyle != null ? timeStyle : "") + "," + chrono.getId() + ")";
+ }
+ }
+
+
+ //-----------------------------------------------------------------------
+ /**
+ * Prints or parses a localized pattern from a localized field.
+ * The specific formatter and parameters is not selected until the
+ * the field is to be printed or parsed.
+ * The locale is needed to select the proper WeekFields from which
+ * the field for day-of-week, week-of-month, or week-of-year is selected.
+ */
+ static final class WeekBasedFieldPrinterParser implements DateTimePrinterParser {
+ private char chr;
+ private int count;
+
+ /**
+ * Constructor.
+ *
+ * @param chr the pattern format letter that added this PrinterParser.
+ * @param count the repeat count of the format letter
+ */
+ WeekBasedFieldPrinterParser(char chr, int count) {
+ this.chr = chr;
+ this.count = count;
+ }
+
+ @Override
+ public boolean print(DateTimePrintContext context, StringBuilder buf) {
+ return printerParser(context.getLocale()).print(context, buf);
+ }
+
+ @Override
+ public int parse(DateTimeParseContext context, CharSequence text, int position) {
+ return printerParser(context.getLocale()).parse(context, text, position);
+ }
+
+ /**
+ * Gets the printerParser to use based on the field and the locale.
+ *
+ * @param locale the locale to use, not null
+ * @return the formatter, not null
+ * @throws IllegalArgumentException if the formatter cannot be found
+ */
+ private DateTimePrinterParser printerParser(Locale locale) {
+ WeekFields weekDef = WeekFields.of(locale);
+ TemporalField field = null;
+ switch (chr) {
+ case 'e':
+ field = weekDef.dayOfWeek();
+ break;
+ case 'w':
+ field = weekDef.weekOfMonth();
+ break;
+ case 'W':
+ field = weekDef.weekOfYear();
+ break;
+ default:
+ throw new IllegalStateException("unreachable");
+ }
+ return new NumberPrinterParser(field, (count == 2 ? 2 : 1), 2, SignStyle.NOT_NEGATIVE);
+ }
+
+ @Override
+ public String toString() {
+ return String.format("WeekBased(%c%d)", chr, count);
+ }
+ }
+
+
+ //-------------------------------------------------------------------------
+ /**
+ * Length comparator.
+ */
+ static final Comparator<String> LENGTH_SORT = new Comparator<String>() {
+ @Override
+ public int compare(String str1, String str2) {
+ return str1.length() == str2.length() ? str1.compareTo(str2) : str1.length() - str2.length();
+ }
+ };
+
+}