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Jackson Data Binding Source Code
Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".
Jackson Databind Source Code files are provided in the source packge (jackson-databind-2.14.0-sources.jar). You can download it at Jackson Maven Website.
You can also browse Jackson Databind Source Code below:
✍: FYIcenter.com
⏎ com/fasterxml/jackson/databind/util/StdDateFormat.java
package com.fasterxml.jackson.databind.util; import java.text.DateFormat; import java.text.FieldPosition; import java.text.ParseException; import java.text.ParsePosition; import java.text.SimpleDateFormat; import java.util.*; import java.util.regex.Matcher; import java.util.regex.Pattern; import com.fasterxml.jackson.core.io.NumberInput; /** * Jackson's internal {@link DateFormat} implementation used by standard Date * serializers and deserializers to implement default behavior: does <b>NOT</b> * fully implement all aspects expected by {@link DateFormat} and as a consequence * <b>SHOULD NOT</b> to be used by code outside core Jackson databind functionality. * In particular, {@code ParsePosition} argument of {@link #parse(String, ParsePosition)} * and {@link #format(Date, StringBuffer, FieldPosition)} methods is fully ignored; * Jackson itself never calls these methods. *<p> * For serialization defaults to using * an ISO-8601 compliant format (format String "yyyy-MM-dd'T'HH:mm:ss.SSSZ") * and for deserialization, both ISO-8601 and RFC-1123. *<br> * Note that `Z` in format String refers to ISO-8601 time offset notation which produces * values like "-08:00" -- that is, full minute/hour combo without colon, and not using `Z` * as alias for "+00:00". * Inclusion of colon as separator, as default setting, started in Jackson 2.11: * prior versions omitted it. * Note that it is possible to enable/disable use of colon in time offset by using method * {@link #withColonInTimeZone} for creating new differently configured format instance, * and configuring {@code ObjectMapper} with it. *<p> * TODO: in Jackson 2.14 or later, should change behavior to fail if {@link ParsePosition} * is specified by caller (at least with non-0 offset). */ @SuppressWarnings("serial") public class StdDateFormat extends DateFormat { /* 24-Jun-2017, tatu: Finally rewrote deserialization to use basic Regex * instead of SimpleDateFormat; partly for better concurrency, partly * for easier enforcing of specific rules. Heavy lifting done by Calendar, * anyway. */ protected final static String PATTERN_PLAIN_STR = "\\d\\d\\d\\d[-]\\d\\d[-]\\d\\d"; protected final static Pattern PATTERN_PLAIN = Pattern.compile(PATTERN_PLAIN_STR); protected final static Pattern PATTERN_ISO8601; static { Pattern p = null; try { p = Pattern.compile(PATTERN_PLAIN_STR +"[T]\\d\\d[:]\\d\\d(?:[:]\\d\\d)?" // hours, minutes, optional seconds +"(\\.\\d+)?" // optional second fractions +"(Z|[+-]\\d\\d(?:[:]?\\d\\d)?)?" // optional timeoffset/Z ); } catch (Throwable t) { throw new RuntimeException(t); } PATTERN_ISO8601 = p; } /** * Defines a commonly used date format that conforms * to ISO-8601 date formatting standard, when it includes basic undecorated * timezone definition. */ public final static String DATE_FORMAT_STR_ISO8601 = "yyyy-MM-dd'T'HH:mm:ss.SSSX"; /** * ISO-8601 with just the Date part, no time: needed for error messages */ protected final static String DATE_FORMAT_STR_PLAIN = "yyyy-MM-dd"; /** * This constant defines the date format specified by * RFC 1123 / RFC 822. Used for parsing via `SimpleDateFormat` as well as * error messages. */ protected final static String DATE_FORMAT_STR_RFC1123 = "EEE, dd MMM yyyy HH:mm:ss zzz"; /** * For error messages we'll also need a list of all formats. */ protected final static String[] ALL_FORMATS = new String[] { DATE_FORMAT_STR_ISO8601, "yyyy-MM-dd'T'HH:mm:ss.SSS", // ISO-8601 but no timezone DATE_FORMAT_STR_RFC1123, DATE_FORMAT_STR_PLAIN }; /** * By default we use UTC for everything, with Jackson 2.7 and later * (2.6 and earlier relied on GMT) */ protected final static TimeZone DEFAULT_TIMEZONE; static { DEFAULT_TIMEZONE = TimeZone.getTimeZone("UTC"); // since 2.7 } protected final static Locale DEFAULT_LOCALE = Locale.US; protected final static DateFormat DATE_FORMAT_RFC1123; /* Let's construct "blueprint" date format instances: cannot be used * as is, due to thread-safety issues, but can be used for constructing * actual instances more cheaply (avoids re-parsing). */ static { // Another important thing: let's force use of default timezone for // baseline DataFormat objects DATE_FORMAT_RFC1123 = new SimpleDateFormat(DATE_FORMAT_STR_RFC1123, DEFAULT_LOCALE); DATE_FORMAT_RFC1123.setTimeZone(DEFAULT_TIMEZONE); } /** * A singleton instance can be used for cloning purposes, as a blueprint of sorts. */ public final static StdDateFormat instance = new StdDateFormat(); /** * Blueprint "Calendar" instance for use during formatting. Cannot be used as is, * due to thread-safety issues, but can be used for constructing actual instances * more cheaply by cloning. * * @since 2.9.1 */ protected static final Calendar CALENDAR = new GregorianCalendar(DEFAULT_TIMEZONE, DEFAULT_LOCALE); /** * Caller may want to explicitly override timezone to use; if so, * we will have non-null value here. */ protected transient TimeZone _timezone; protected final Locale _locale; /** * Explicit override for leniency, if specified. *<p> * Cannot be `final` because {@link #setLenient(boolean)} returns * `void`. * * @since 2.7 */ protected Boolean _lenient; /** * Lazily instantiated calendar used by this instance for serialization ({@link #format(Date)}). * * @since 2.9.1 */ private transient Calendar _calendar; private transient DateFormat _formatRFC1123; /** * Whether the TZ offset must be formatted with a colon between hours and minutes ({@code HH:mm} format) *<p> * Defaults to {@code true} since 2.11: earlier versions defaulted to {@code false} * for backwards compatibility reasons * * @since 2.9.1 */ private boolean _tzSerializedWithColon = true; /* /********************************************************** /* Life cycle, accessing singleton "standard" formats /********************************************************** */ public StdDateFormat() { _locale = DEFAULT_LOCALE; } @Deprecated // since 2.7 public StdDateFormat(TimeZone tz, Locale loc) { _timezone = tz; _locale = loc; } protected StdDateFormat(TimeZone tz, Locale loc, Boolean lenient) { this(tz, loc, lenient, false); } /** * @since 2.9.1 */ protected StdDateFormat(TimeZone tz, Locale loc, Boolean lenient, boolean formatTzOffsetWithColon) { _timezone = tz; _locale = loc; _lenient = lenient; _tzSerializedWithColon = formatTzOffsetWithColon; } public static TimeZone getDefaultTimeZone() { return DEFAULT_TIMEZONE; } /** * Method used for creating a new instance with specified timezone; * if no timezone specified, defaults to the default timezone (UTC). */ public StdDateFormat withTimeZone(TimeZone tz) { if (tz == null) { tz = DEFAULT_TIMEZONE; } if ((tz == _timezone) || tz.equals(_timezone)) { return this; } return new StdDateFormat(tz, _locale, _lenient, _tzSerializedWithColon); } /** * "Mutant factory" method that will return an instance that uses specified * {@code Locale}: * either {@code this} instance (if setting would not change), or newly * constructed instance with different {@code Locale} to use. */ public StdDateFormat withLocale(Locale loc) { if (loc.equals(_locale)) { return this; } return new StdDateFormat(_timezone, loc, _lenient, _tzSerializedWithColon); } /** * "Mutant factory" method that will return an instance that has specified leniency * setting: either {@code this} instance (if setting would not change), or newly * constructed instance. * * @since 2.9 */ public StdDateFormat withLenient(Boolean b) { if (_equals(b, _lenient)) { return this; } return new StdDateFormat(_timezone, _locale, b, _tzSerializedWithColon); } /** * "Mutant factory" method that will return an instance that has specified * handling of colon when serializing timezone (timezone either written * like {@code +0500} or {@code +05:00}): * either {@code this} instance (if setting would not change), or newly * constructed instance with desired setting for colon inclusion. *<p> * NOTE: does NOT affect deserialization as colon is optional accepted * but not required -- put another way, either serialization is accepted * by this class. * * @since 2.9.1 */ public StdDateFormat withColonInTimeZone(boolean b) { if (_tzSerializedWithColon == b) { return this; } return new StdDateFormat(_timezone, _locale, _lenient, b); } @Override public StdDateFormat clone() { // Although there isn't that much state to share, we do need to // orchestrate a bit, mostly since timezones may be changed return new StdDateFormat(_timezone, _locale, _lenient, _tzSerializedWithColon); } /** * Method for getting a non-shared DateFormat instance * that uses specified timezone and can handle simple ISO-8601 * compliant date format. * * @since 2.4 * * @deprecated Since 2.9 */ @Deprecated // since 2.9 public static DateFormat getISO8601Format(TimeZone tz, Locale loc) { DateFormat df = new SimpleDateFormat(DATE_FORMAT_STR_ISO8601, loc); df.setTimeZone(DEFAULT_TIMEZONE); return df; } /** * Method for getting a non-shared DateFormat instance * that uses specific timezone and can handle RFC-1123 * compliant date format. * * @since 2.4 * * @deprecated Since 2.9 */ @Deprecated // since 2.9 public static DateFormat getRFC1123Format(TimeZone tz, Locale loc) { return _cloneFormat(DATE_FORMAT_RFC1123, DATE_FORMAT_STR_RFC1123, tz, loc, null); } /* /********************************************************** /* Public API, configuration /********************************************************** */ @Override // since 2.6 public TimeZone getTimeZone() { return _timezone; } @Override public void setTimeZone(TimeZone tz) { // DateFormats are timezone-specific (via Calendar contained), // so need to reset instances if timezone changes: if (!tz.equals(_timezone)) { _clearFormats(); _timezone = tz; } } /** * Need to override since we need to keep track of leniency locally, * and not via underlying {@link Calendar} instance like base class * does. */ @Override // since 2.7 public void setLenient(boolean enabled) { Boolean newValue = Boolean.valueOf(enabled); if (!_equals(newValue, _lenient)) { _lenient = newValue; // and since leniency settings may have been used: _clearFormats(); } } @Override // since 2.7 public boolean isLenient() { // default is, I believe, true return (_lenient == null) || _lenient.booleanValue(); } /** * Accessor for checking whether this instance would include colon * within timezone serialization or not: if {code true}, timezone offset * is serialized like {@code -06:00}; if {code false} as {@code -0600}. *<p> * NOTE: only relevant for serialization (formatting), as deserialization * (parsing) always accepts optional colon but does not require it, regardless * of this setting. * * @return {@code true} if a colon is to be inserted between the hours and minutes * of the TZ offset when serializing as String; otherwise {@code false} * * @since 2.9.1 */ public boolean isColonIncludedInTimeZone() { return _tzSerializedWithColon; } /* /********************************************************** /* Public API, parsing /********************************************************** */ @Override public Date parse(String dateStr) throws ParseException { dateStr = dateStr.trim(); ParsePosition pos = new ParsePosition(0); Date dt = _parseDate(dateStr, pos); if (dt != null) { return dt; } StringBuilder sb = new StringBuilder(); for (String f : ALL_FORMATS) { if (sb.length() > 0) { sb.append("\", \""); } else { sb.append('"'); } sb.append(f); } sb.append('"'); throw new ParseException (String.format("Cannot parse date \"%s\": not compatible with any of standard forms (%s)", dateStr, sb.toString()), pos.getErrorIndex()); } // 24-Jun-2017, tatu: I don't think this ever gets called. So could... just not implement? @Override public Date parse(String dateStr, ParsePosition pos) { try { return _parseDate(dateStr, pos); } catch (ParseException e) { // may look weird but this is what `DateFormat` suggest to do... } return null; } protected Date _parseDate(String dateStr, ParsePosition pos) throws ParseException { if (looksLikeISO8601(dateStr)) { // also includes "plain" return parseAsISO8601(dateStr, pos); } // Also consider "stringified" simple time stamp int i = dateStr.length(); while (--i >= 0) { char ch = dateStr.charAt(i); if (ch < '0' || ch > '9') { // 07-Aug-2013, tatu: And [databind#267] points out that negative numbers should also work if (i > 0 || ch != '-') { break; } } } if ((i < 0) // let's just assume negative numbers are fine (can't be RFC-1123 anyway); check length for positive && (dateStr.charAt(0) == '-' || NumberInput.inLongRange(dateStr, false))) { return _parseDateFromLong(dateStr, pos); } // Otherwise, fall back to using RFC 1123. NOTE: call will NOT throw, just returns `null` return parseAsRFC1123(dateStr, pos); } /* /********************************************************** /* Public API, writing /********************************************************** */ @Override public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition fieldPosition) { TimeZone tz = _timezone; if (tz == null) { tz = DEFAULT_TIMEZONE; } _format(tz, _locale, date, toAppendTo); return toAppendTo; } protected void _format(TimeZone tz, Locale loc, Date date, StringBuffer buffer) { Calendar cal = _getCalendar(tz); cal.setTime(date); // [databind#2167]: handle range beyond [1, 9999] final int year = cal.get(Calendar.YEAR); // Assuming GregorianCalendar, special handling needed for BCE (aka BC) if (cal.get(Calendar.ERA) == GregorianCalendar.BC) { _formatBCEYear(buffer, year); } else { if (year > 9999) { // 22-Nov-2018, tatu: Handling beyond 4-digits is not well specified wrt ISO-8601, but // it seems that plus prefix IS mandated. Padding is an open question, but since agreeement // for max length would be needed, we ewould need to limit to arbitrary length // like five digits (erroring out if beyond or padding to that as minimum). // Instead, let's just print number out as is and let decoder try to make sense of it. buffer.append('+'); } pad4(buffer, year); } buffer.append('-'); pad2(buffer, cal.get(Calendar.MONTH) + 1); buffer.append('-'); pad2(buffer, cal.get(Calendar.DAY_OF_MONTH)); buffer.append('T'); pad2(buffer, cal.get(Calendar.HOUR_OF_DAY)); buffer.append(':'); pad2(buffer, cal.get(Calendar.MINUTE)); buffer.append(':'); pad2(buffer, cal.get(Calendar.SECOND)); buffer.append('.'); pad3(buffer, cal.get(Calendar.MILLISECOND)); int offset = tz.getOffset(cal.getTimeInMillis()); if (offset != 0) { int hours = Math.abs((offset / (60 * 1000)) / 60); int minutes = Math.abs((offset / (60 * 1000)) % 60); buffer.append(offset < 0 ? '-' : '+'); pad2(buffer, hours); if( _tzSerializedWithColon ) { buffer.append(':'); } pad2(buffer, minutes); } else { // 24-Jun-2017, tatu: While `Z` would be conveniently short, older specs // mandate use of full `+0000` // 06-Mar-2020, tatu: Actually statement should read "for compatibility reasons" // and not standards (unless it is wrt RFC-1123). This will change in 3.0 at latest // formatted.append('Z'); if( _tzSerializedWithColon ) { buffer.append("+00:00"); } else { buffer.append("+0000"); } } } protected void _formatBCEYear(StringBuffer buffer, int bceYearNoSign) { // Ok. First of all, BCE 1 output (given as value `1` in era BCE) needs to become // "+0000", but rest (from `2` up, in that era) need minus sign. if (bceYearNoSign == 1) { buffer.append("+0000"); return; } final int isoYear = bceYearNoSign - 1; buffer.append('-'); // as with CE, 4 digit variant needs padding; beyond that not (although that part is // open to debate, needs agreement with receiver) // But `pad4()` deals with "big" numbers now so: pad4(buffer, isoYear); } private static void pad2(StringBuffer buffer, int value) { int tens = value / 10; if (tens == 0) { buffer.append('0'); } else { buffer.append((char) ('0' + tens)); value -= 10 * tens; } buffer.append((char) ('0' + value)); } private static void pad3(StringBuffer buffer, int value) { int h = value / 100; if (h == 0) { buffer.append('0'); } else { buffer.append((char) ('0' + h)); value -= (h * 100); } pad2(buffer, value); } private static void pad4(StringBuffer buffer, int value) { int h = value / 100; if (h == 0) { buffer.append('0').append('0'); } else { if (h > 99) { // [databind#2167]: handle above 9999 correctly buffer.append(h); } else { pad2(buffer, h); } value -= (100 * h); } pad2(buffer, value); } /* /********************************************************** /* Std overrides /********************************************************** */ @Override public String toString() { return String.format("DateFormat %s: (timezone: %s, locale: %s, lenient: %s)", getClass().getName(), _timezone, _locale, _lenient); } public String toPattern() { // same as SimpleDateFormat StringBuilder sb = new StringBuilder(100); sb.append("[one of: '") .append(DATE_FORMAT_STR_ISO8601) .append("', '") .append(DATE_FORMAT_STR_RFC1123) .append("' (") ; sb.append(Boolean.FALSE.equals(_lenient) ? "strict" : "lenient") .append(")]"); return sb.toString(); } @Override // since 2.7[.2], as per [databind#1130] public boolean equals(Object o) { return (o == this); } @Override // since 2.7[.2], as per [databind#1130] public int hashCode() { return System.identityHashCode(this); } /* /********************************************************** /* Helper methods, parsing /********************************************************** */ /** * Helper method used to figure out if input looks like valid * ISO-8601 string. */ protected boolean looksLikeISO8601(String dateStr) { if (dateStr.length() >= 7 // really need 10, but... && Character.isDigit(dateStr.charAt(0)) && Character.isDigit(dateStr.charAt(3)) && dateStr.charAt(4) == '-' && Character.isDigit(dateStr.charAt(5)) ) { return true; } return false; } private Date _parseDateFromLong(String longStr, ParsePosition pos) throws ParseException { long ts; try { ts = NumberInput.parseLong(longStr); } catch (NumberFormatException e) { throw new ParseException(String.format( "Timestamp value %s out of 64-bit value range", longStr), pos.getErrorIndex()); } return new Date(ts); } protected Date parseAsISO8601(String dateStr, ParsePosition pos) throws ParseException { try { return _parseAsISO8601(dateStr, pos); } catch (IllegalArgumentException e) { throw new ParseException(String.format("Cannot parse date \"%s\", problem: %s", dateStr, e.getMessage()), pos.getErrorIndex()); } } protected Date _parseAsISO8601(String dateStr, ParsePosition bogus) throws IllegalArgumentException, ParseException { final int totalLen = dateStr.length(); // actually, one short-cut: if we end with "Z", must be UTC TimeZone tz = DEFAULT_TIMEZONE; if ((_timezone != null) && ('Z' != dateStr.charAt(totalLen-1))) { tz = _timezone; } Calendar cal = _getCalendar(tz); cal.clear(); String formatStr; if (totalLen <= 10) { Matcher m = PATTERN_PLAIN.matcher(dateStr); if (m.matches()) { int year = _parse4D(dateStr, 0); int month = _parse2D(dateStr, 5)-1; int day = _parse2D(dateStr, 8); cal.set(year, month, day, 0, 0, 0); cal.set(Calendar.MILLISECOND, 0); return cal.getTime(); } formatStr = DATE_FORMAT_STR_PLAIN; } else { Matcher m = PATTERN_ISO8601.matcher(dateStr); if (m.matches()) { // Important! START with optional time zone; otherwise Calendar will explode int start = m.start(2); int end = m.end(2); int len = end-start; if (len > 1) { // 0 -> none, 1 -> 'Z' // NOTE: first char is sign; then 2 digits, then optional colon, optional 2 digits int offsetSecs = _parse2D(dateStr, start+1) * 3600; // hours if (len >= 5) { offsetSecs += _parse2D(dateStr, end-2) * 60; // minutes } if (dateStr.charAt(start) == '-') { offsetSecs *= -1000; } else { offsetSecs *= 1000; } cal.set(Calendar.ZONE_OFFSET, offsetSecs); // 23-Jun-2017, tatu: Not sure why, but this appears to be needed too: cal.set(Calendar.DST_OFFSET, 0); } int year = _parse4D(dateStr, 0); int month = _parse2D(dateStr, 5)-1; int day = _parse2D(dateStr, 8); // So: 10 chars for date, then `T`, so starts at 11 int hour = _parse2D(dateStr, 11); int minute = _parse2D(dateStr, 14); // Seconds are actually optional... so int seconds; if ((totalLen > 16) && dateStr.charAt(16) == ':') { seconds = _parse2D(dateStr, 17); } else { seconds = 0; } cal.set(year, month, day, hour, minute, seconds); // Optional milliseconds start = m.start(1) + 1; end = m.end(1); int msecs = 0; if (start >= end) { // no fractional cal.set(Calendar.MILLISECOND, 0); } else { // first char is '.', but rest.... msecs = 0; final int fractLen = end-start; switch (fractLen) { default: // [databind#1745] Allow longer fractions... for now, cap at nanoseconds tho if (fractLen > 9) { // only allow up to nanos throw new ParseException(String.format( "Cannot parse date \"%s\": invalid fractional seconds '%s'; can use at most 9 digits", dateStr, m.group(1).substring(1) ), start); } // fall through case 3: msecs += (dateStr.charAt(start+2) - '0'); case 2: msecs += 10 * (dateStr.charAt(start+1) - '0'); case 1: msecs += 100 * (dateStr.charAt(start) - '0'); break; case 0: break; } cal.set(Calendar.MILLISECOND, msecs); } return cal.getTime(); } formatStr = DATE_FORMAT_STR_ISO8601; } throw new ParseException (String.format("Cannot parse date \"%s\": while it seems to fit format '%s', parsing fails (leniency? %s)", dateStr, formatStr, _lenient), // [databind#1742]: Might be able to give actual location, some day, but for now // we can't give anything more indicative 0); } private static int _parse4D(String str, int index) { return (1000 * (str.charAt(index) - '0')) + (100 * (str.charAt(index+1) - '0')) + (10 * (str.charAt(index+2) - '0')) + (str.charAt(index+3) - '0'); } private static int _parse2D(String str, int index) { return (10 * (str.charAt(index) - '0')) + (str.charAt(index+1) - '0'); } protected Date parseAsRFC1123(String dateStr, ParsePosition pos) { if (_formatRFC1123 == null) { _formatRFC1123 = _cloneFormat(DATE_FORMAT_RFC1123, DATE_FORMAT_STR_RFC1123, _timezone, _locale, _lenient); } return _formatRFC1123.parse(dateStr, pos); } /* /********************************************************** /* Helper methods, other /********************************************************** */ private final static DateFormat _cloneFormat(DateFormat df, String format, TimeZone tz, Locale loc, Boolean lenient) { if (!loc.equals(DEFAULT_LOCALE)) { df = new SimpleDateFormat(format, loc); df.setTimeZone((tz == null) ? DEFAULT_TIMEZONE : tz); } else { df = (DateFormat) df.clone(); if (tz != null) { df.setTimeZone(tz); } } if (lenient != null) { df.setLenient(lenient.booleanValue()); } return df; } protected void _clearFormats() { _formatRFC1123 = null; } protected Calendar _getCalendar(TimeZone tz) { Calendar cal = _calendar; if (cal == null ) { _calendar = cal = (Calendar)CALENDAR.clone(); } if (!cal.getTimeZone().equals(tz) ) { cal.setTimeZone(tz); } cal.setLenient(isLenient()); return cal; } protected static <T> boolean _equals(T value1, T value2) { if (value1 == value2) { return true; } return (value1 != null) && value1.equals(value2); } }
⏎ com/fasterxml/jackson/databind/util/StdDateFormat.java
Or download all of them as a single archive file:
File name: jackson-databind-2.14.0-sources.jar File size: 1187952 bytes Release date: 2022-11-05 Download
⇒ Jackson Annotations Source Code
⇐ Download and Install Jackson Binary Package
2022-03-29, 109274👍, 0💬
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