net.time4j.SystemTemporalFormatter Maven / Gradle / Ivy
/*
* -----------------------------------------------------------------------
* Copyright © 2013-2016 Meno Hochschild, A temporal formatter of the system format engine.
*
* @author Meno Hochschild
* @since 3.0
* @doctags.concurrency
*/
final class SystemTemporalFormatter
implements TemporalFormatter {
//~ Statische Felder/Initialisierungen --------------------------------
private static final String RFC_1123_WIDE = "EEE, d MMM yyyy HH:mm:ss Z";
private static final String RFC_1123_SHORT = "d MMM yyyy HH:mm:ss Z";
private static final Date PROLEPTIC_GREGORIAN = new Date(Long.MIN_VALUE);
private static final PlainDate UNIX_EPOCH_DATE = PlainDate.of(1970, 1, 1);
private static final Map, Chronology> SUPPORTED_TYPES;
static {
Map, Chronology> tmp = new HashMap<>();
tmp.put(PlainDate.class, PlainDate.axis());
tmp.put(PlainTime.class, PlainTime.axis());
tmp.put(PlainTimestamp.class, PlainTimestamp.axis());
tmp.put(Moment.class, Moment.axis());
SUPPORTED_TYPES = Collections.unmodifiableMap(tmp);
}
//~ Instanzvariablen --------------------------------------------------
private final Class type;
private final String pattern;
private final Locale locale;
private final Leniency leniency;
private final String tzid;
//~ Konstruktoren -----------------------------------------------------
/**
* Standard-Konstruktor.
*
* @param type chronological type
* @param pattern format pattern
* @param locale language and country setting
* @param leniency lenient setting
* @param tzid timezone id (optional)
*/
SystemTemporalFormatter(
Class type,
String pattern,
Locale locale,
Leniency leniency,
String tzid
) {
super();
if (type == null) {
throw new NullPointerException("Missing chronological type");
} else if (pattern.isEmpty()) {
throw new IllegalArgumentException("Format pattern is empty.");
} else if (locale == null) {
throw new NullPointerException("Locale is not specified.");
} else if (leniency == null){
throw new NullPointerException("Missing leniency.");
}
this.type = type;
this.pattern = pattern;
this.locale = locale;
this.leniency = leniency;
this.tzid = tzid;
}
//~ Methoden ----------------------------------------------------------
@Override
public String format(T formattable) {
StringBuilder buffer = new StringBuilder();
try {
this.formatToBuffer(formattable, buffer);
return buffer.toString();
} catch (IOException ioe) {
throw new AssertionError(ioe); // cannot happen
}
}
@Override
public void formatToBuffer(T formattable, Appendable buffer) throws IOException {
String text;
if (this.type.equals(PlainDate.class)) {
PlainDate date = PlainDate.class.cast(formattable);
Date jud = TemporalType.JAVA_UTIL_DATE.from(date.atStartOfDay().atUTC());
text = this.setUpLocal().format(jud);
} else if (this.type.equals(PlainTime.class)) {
PlainTime time = PlainTime.class.cast(formattable);
Date jud = TemporalType.JAVA_UTIL_DATE.from(UNIX_EPOCH_DATE.at(time).atUTC());
text = this.setUpLocal().format(jud);
} else if (this.type.equals(PlainTimestamp.class)) {
PlainTimestamp timestamp = PlainTimestamp.class.cast(formattable);
Date jud = TemporalType.JAVA_UTIL_DATE.from(timestamp.atUTC());
text = this.setUpLocal().format(jud);
} else if (this.type.equals(Moment.class)) {
Moment moment = Moment.class.cast(formattable);
if (this.tzid == null) {
throw new IllegalArgumentException("Cannot print moment without timezone.");
}
String realPattern = this.pattern;
if (realPattern.equals(SystemFormatEngine.RFC_1123_PATTERN)) {
realPattern = RFC_1123_WIDE;
}
SystemTemporalFormatter stf =
new SystemTemporalFormatter<>(
ZonalDateTime.class, realPattern, this.locale, this.leniency, this.tzid);
text = stf.format(moment.inZonalView(this.tzid));
} else if (this.type.equals(ZonalDateTime.class)) {
ZonalDateTime zdt = ZonalDateTime.class.cast(formattable);
Moment moment = zdt.toMoment();
Date jud = TemporalType.JAVA_UTIL_DATE.from(moment);
String timezone = (
this.tzid == null
? zdt.getTimezone().canonical()
: this.tzid);
Timezone tz = Timezone.of(timezone);
String replaceTZ = "GMT" + tz.getOffset(moment).toString();
XCalendar gcal = new XCalendar(TimeZone.getTimeZone(replaceTZ), this.locale);
SimpleDateFormat sdf = setUp(this.pattern, this.locale, gcal, !this.leniency.isStrict());
FieldPosition fp = new FieldPosition(DateFormat.TIMEZONE_FIELD);
StringBuffer sb = new StringBuffer();
text = sdf.format(jud, sb, fp).toString();
int start = fp.getBeginIndex();
int end = fp.getEndIndex();
if (
(end > start)
&& (start > 0)
&& !(tz.getID() instanceof ZonalOffset)
&& this.hasTimezoneField()
) {
boolean dst = tz.isDaylightSaving(moment);
boolean abbreviated = !this.pattern.contains("zzzz");
NameStyle style = (
abbreviated
? (dst ? NameStyle.SHORT_DAYLIGHT_TIME : NameStyle.SHORT_STANDARD_TIME)
: (dst ? NameStyle.LONG_DAYLIGHT_TIME : NameStyle.LONG_STANDARD_TIME)
);
String name = tz.getDisplayName(style, this.locale);
text = text.substring(0, start) + name + text.substring(end);
}
} else {
throw new IllegalArgumentException("Not formattable: " + formattable);
}
buffer.append(text);
}
@Override
public T parse(CharSequence text) throws ParseException {
ParsePosition pp = new ParsePosition(0);
T result;
try {
result = this.parseInternal(text, pp, true, null);
if ((result == null) || (pp.getErrorIndex() > -1)) {
throw new ParseException("Cannot parse: " + text, pp.getErrorIndex());
}
} catch (RuntimeException re) {
ParseException pe = new ParseException(re.getMessage(), pp.getErrorIndex());
pe.initCause(re);
throw pe;
}
return result;
}
@Override
public T parse(CharSequence text, ParsePosition position) {
return this.parseInternal(text, position, false, null);
}
@Override
public T parse(CharSequence text, ParsePosition position, RawValues rawValues) {
if (rawValues == null) {
throw new NullPointerException("Missing raw values.");
}
return this.parseInternal(text, position, false, rawValues);
}
@Override
public TemporalFormatter withTimezone(TZID tzid) {
return this.withTimezone(tzid.canonical());
}
@Override
public TemporalFormatter withTimezone(String tzid) {
return new SystemTemporalFormatter<>(
this.type,
this.pattern,
this.locale,
this.leniency,
tzid
);
}
@Override
public TemporalFormatter with(Locale locale) {
return new SystemTemporalFormatter<>(
this.type,
this.pattern,
locale,
this.leniency,
this.tzid
);
}
@Override
public TemporalFormatter with(Leniency leniency) {
return new SystemTemporalFormatter<>(
this.type,
this.pattern,
this.locale,
leniency,
this.tzid
);
}
@Override
public AttributeQuery getAttributes() {
Chronology chronology = SUPPORTED_TYPES.get(this.type);
Attributes.Builder ab = (
(chronology == null)
? new Attributes.Builder()
: new Attributes.Builder(chronology));
ab.setLanguage(this.locale);
ab.set(Attributes.LENIENCY, this.leniency);
if (this.tzid != null) {
ab.setTimezone(this.tzid);
}
return ab.build();
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
} else if (obj instanceof SystemTemporalFormatter) {
SystemTemporalFormatter that = (SystemTemporalFormatter) obj;
return (
this.type.equals(that.type)
&& this.pattern.equals(that.pattern)
&& this.locale.equals(that.locale)
&& (this.leniency == that.leniency)
&& ((this.tzid == null) ? (that.tzid == null) : this.tzid.equals(that.tzid))
);
} else {
return false;
}
}
@Override
public int hashCode() {
return 17 * this.pattern.hashCode() + 31 * this.locale.hashCode() + 37 * this.tzid.hashCode();
}
private boolean hasTimezoneField() {
boolean literal = false;
for (int i = this.pattern.length() - 1; i >= 0; i--) {
char c = this.pattern.charAt(i);
if (c == '\'') {
literal = !literal;
} else if (!literal && (c == 'z')) {
return true;
}
}
return false;
}
private static void updateRawValues(
RawValues rawValues,
SimpleDateFormat sdf
) {
if (rawValues != null) {
rawValues.accept(new Parsed(XCalendar.class.cast(sdf.getCalendar())));
}
}
private SimpleDateFormat setUpLocal() {
XCalendar gcal = new XCalendar(TimeZone.getTimeZone("GMT"), this.locale);
return setUp(this.pattern, this.locale, gcal, !this.leniency.isStrict());
}
private static SimpleDateFormat setUp(
String pattern,
Locale locale,
XCalendar gcal,
boolean lenient
) {
SimpleDateFormat sdf = new SimpleDateFormat(pattern, locale);
sdf.setCalendar(gcal);
sdf.setLenient(lenient);
return sdf;
}
private T parseInternal(
CharSequence text,
ParsePosition position,
boolean wantsException,
RawValues rawValues
) {
String parseable = text.toString();
Object result;
if (this.type.equals(PlainDate.class)) {
SimpleDateFormat sdf = this.setUpLocal();
Date jud = sdf.parse(parseable, position);
PlainTimestamp tsp = TemporalType.JAVA_UTIL_DATE.translate(jud).toZonalTimestamp(ZonalOffset.UTC);
result = tsp.getCalendarDate();
updateRawValues(rawValues, sdf);
} else if (this.type.equals(PlainTime.class)) {
SimpleDateFormat sdf = this.setUpLocal();
Date jud = sdf.parse(parseable, position);
PlainTimestamp tsp = TemporalType.JAVA_UTIL_DATE.translate(jud).toZonalTimestamp(ZonalOffset.UTC);
result = tsp.getWallTime();
updateRawValues(rawValues, sdf);
} else if (this.type.equals(PlainTimestamp.class)) {
SimpleDateFormat sdf = this.setUpLocal();
Date jud = sdf.parse(parseable, position);
result = TemporalType.JAVA_UTIL_DATE.translate(jud).toZonalTimestamp(ZonalOffset.UTC);
updateRawValues(rawValues, sdf);
} else if (this.type.equals(Moment.class)) {
String realPattern = this.pattern;
if (realPattern.equals(SystemFormatEngine.RFC_1123_PATTERN)) {
String test = parseable.substring(position.getIndex());
if ((test.length() >= 4) && (test.charAt(3) == ',')) {
realPattern = RFC_1123_WIDE;
} else {
realPattern = RFC_1123_SHORT;
}
int count = 0;
for (int i = test.length() - 1; i >= 0 && count < 2; i--) {
if (test.charAt(i) == ':') {
count++;
}
}
if (count >= 2) {
realPattern = realPattern.replace(":ss", "");
}
}
SystemTemporalFormatter stf =
new SystemTemporalFormatter<>(
ZonalDateTime.class, realPattern, this.locale, this.leniency, this.tzid);
ZonalDateTime zdt = stf.parseInternal(text, position, wantsException, rawValues);
result = ((zdt == null) ? null : zdt.toMoment());
} else if (this.type.equals(ZonalDateTime.class)) {
String timezone = (
(this.tzid == null)
? "GMT-18:00"
: this.tzid.replace("UTC", "GMT"));
XCalendar gcal = new XCalendar(TimeZone.getTimeZone(timezone), this.locale);
SimpleDateFormat sdf = setUp(this.pattern, this.locale, gcal, !this.leniency.isStrict());
Date jud = sdf.parse(parseable, position);
if (
(jud == null)
|| (position.getErrorIndex() >= 0)
) {
return null;
}
Parsed parsed = new Parsed(gcal);
int offset = gcal.get(Calendar.ZONE_OFFSET) + gcal.get(Calendar.DST_OFFSET);
if (offset == -1080) {
position.setErrorIndex(position.getIndex());
if (wantsException) {
throw new IllegalArgumentException("Cannot parse text without timezone: " + parseable);
} else {
return null;
}
} else if (!gcal.getTimeZone().getID().equals(timezone)) {
timezone = gcal.getTimeZone().getID();
} else {
ZonalOffset zo = ZonalOffset.ofTotalSeconds(offset / 1000);
if (
(this.tzid != null)
&& (gcal.getTimeZone().getOffset(jud.getTime()) == offset)
) {
timezone = this.tzid;
} else {
timezone = zo.canonical();
}
}
TZID parsedTimezone = Timezone.of(timezone).getID();
parsed.setTimezone(parsedTimezone);
PlainTimestamp tsp =
PlainTimestamp.axis().createFrom(parsed, this.getAttributes(), this.leniency.isLax(), false);
if (tsp == null) {
result = null;
} else {
result = tsp.inTimezone(parsedTimezone).inZonalView(parsedTimezone);
}
if (rawValues != null) {
rawValues.accept(parsed);
}
} else {
result = null;
}
return this.type.cast(result);
}
//~ Innere Klassen ----------------------------------------------------
private static class Parsed
extends ChronoEntity {
//~ Instanzvariablen ----------------------------------------------
private final Map, Object> values;
private TZID tzid = null;
//~ Konstruktoren -------------------------------------------------
Parsed(XCalendar cal) {
super();
Map, Object> map = new HashMap<>();
if (cal.isSet(Calendar.YEAR)) {
map.put(PlainDate.YEAR, cal.getRawValue(Calendar.YEAR));
}
if (cal.isSet(Calendar.MONTH)) {
map.put(PlainDate.MONTH_AS_NUMBER, cal.getRawValue(Calendar.MONTH) + 1);
}
if (cal.isSet(Calendar.DAY_OF_YEAR)) {
map.put(PlainDate.DAY_OF_YEAR, cal.getRawValue(Calendar.DAY_OF_YEAR));
}
if (cal.isSet(Calendar.DAY_OF_MONTH)) {
map.put(PlainDate.DAY_OF_MONTH, cal.getRawValue(Calendar.DAY_OF_MONTH));
}
if (cal.isSet(Calendar.AM_PM)) {
map.put(PlainTime.AM_PM_OF_DAY, Meridiem.values()[cal.getRawValue(Calendar.AM_PM)]);
}
if (cal.isSet(Calendar.HOUR)) {
map.put(PlainTime.DIGITAL_HOUR_OF_AMPM, cal.getRawValue(Calendar.HOUR));
}
if (cal.isSet(Calendar.HOUR_OF_DAY)) {
map.put(PlainTime.DIGITAL_HOUR_OF_DAY, cal.getRawValue(Calendar.HOUR_OF_DAY));
}
if (cal.isSet(Calendar.MINUTE)) {
map.put(PlainTime.MINUTE_OF_HOUR, cal.getRawValue(Calendar.MINUTE));
}
if (cal.isSet(Calendar.SECOND)) {
map.put(PlainTime.SECOND_OF_MINUTE, cal.getRawValue(Calendar.SECOND));
}
if (cal.isSet(Calendar.MILLISECOND)) {
map.put(PlainTime.MILLI_OF_SECOND, cal.getRawValue(Calendar.MILLISECOND));
}
this.values = Collections.unmodifiableMap(map);
}
//~ Methoden ------------------------------------------------------
@Override
public boolean contains(ChronoElement element) {
return this.values.containsKey(element);
}
@Override
public V get(ChronoElement element) {
this.check(element);
return element.getType().cast(this.values.get(element));
}
@Override
public int getInt(ChronoElement element) {
if (this.values.containsKey(element)) {
return Integer.class.cast(this.values.get(element)).intValue();
} else {
return Integer.MIN_VALUE;
}
}
@Override
public V getMinimum(ChronoElement element) {
this.check(element);
return element.getDefaultMinimum();
}
@Override
public V getMaximum(ChronoElement element) {
this.check(element);
return element.getDefaultMaximum();
}
@Override
public boolean isValid(
ChronoElement element,
V value // optional
) {
return (element != null);
}
@Override
public Parsed with(
ChronoElement element,
V value // optional
) {
if (element == null) {
throw new NullPointerException();
} else if (value == null) {
this.values.remove(element);
} else {
this.values.put(element, value);
}
return this;
}
@Override
public boolean hasTimezone() {
return (this.tzid != null);
}
@Override
public TZID getTimezone() {
if (this.tzid == null) {
throw new ChronoException("Timezone was not parsed.");
}
return this.tzid;
}
@Override
public Set> getRegisteredElements() {
return Collections.unmodifiableSet(this.values.keySet());
}
void setTimezone(TZID tzid) {
this.tzid = tzid;
}
@Override
protected Chronology getChronology() {
throw new UnsupportedOperationException(
"Parsed values do not have any chronology.");
}
private void check(ChronoElement element) {
if (!this.values.containsKey(element)) {
throw new ChronoException("Element not supported: " + element.name());
}
}
}
private static class XCalendar
extends GregorianCalendar {
//~ Konstruktoren -------------------------------------------------
XCalendar(
TimeZone tz,
Locale locale
) {
super(tz, locale);
this.setGregorianChange(PROLEPTIC_GREGORIAN);
}
//~ Methoden ------------------------------------------------------
int getRawValue(int field) {
return super.internalGet(field);
}
}
}
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