com.ibm.icu.impl.jdkadapter.SimpleDateFormatICU Maven / Gradle / Ivy
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html#License
/*
*******************************************************************************
* Copyright (C) 2008-2011, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
package com.ibm.icu.impl.jdkadapter;
import java.text.AttributedCharacterIterator;
import java.text.AttributedString;
import java.text.CharacterIterator;
import java.text.DateFormatSymbols;
import java.text.FieldPosition;
import java.text.NumberFormat;
import java.text.ParsePosition;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.TimeZone;
import com.ibm.icu.impl.icuadapter.NumberFormatJDK;
import com.ibm.icu.impl.icuadapter.TimeZoneJDK;
import com.ibm.icu.text.DateFormat;
import com.ibm.icu.text.SimpleDateFormat;
/**
* SimpleDateFormatICU is an adapter class which wraps ICU4J SimpleDateFormat and
* implements java.text.SimpleDateFormat APIs.
*/
public class SimpleDateFormatICU extends java.text.SimpleDateFormat {
private static final long serialVersionUID = -2060890659010258983L;
private SimpleDateFormat fIcuSdf;
private SimpleDateFormatICU(SimpleDateFormat icuSdf) {
fIcuSdf = icuSdf;
}
public static java.text.SimpleDateFormat wrap(SimpleDateFormat icuSdf) {
return new SimpleDateFormatICU(icuSdf);
}
// Methods overriding java.text.SimpleDateFormat
@Override
public void applyLocalizedPattern(String pattern) {
fIcuSdf.applyLocalizedPattern(pattern);
}
@Override
public void applyPattern(String pattern) {
fIcuSdf.applyPattern(pattern);
}
@Override
public Object clone() {
SimpleDateFormatICU other = (SimpleDateFormatICU)super.clone();
other.fIcuSdf = (SimpleDateFormat)this.fIcuSdf.clone();
return other;
}
@Override
public boolean equals(Object obj) {
if (obj instanceof SimpleDateFormatICU) {
return ((SimpleDateFormatICU)obj).fIcuSdf.equals(this.fIcuSdf);
}
return false;
}
@Override
public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition pos) {
return fIcuSdf.format(date, toAppendTo, pos);
}
@Override
public AttributedCharacterIterator formatToCharacterIterator(Object obj) {
AttributedCharacterIterator aci = fIcuSdf.formatToCharacterIterator(obj);
// Create a new AttributedString
StringBuilder sb = new StringBuilder(aci.getEndIndex() - aci.getBeginIndex());
char c = aci.first();
while (true) {
sb.append(c);
c = aci.next();
if (c == CharacterIterator.DONE) {
break;
}
}
AttributedString resstr = new AttributedString(sb.toString());
// Mapping attributes
Map attributes = null;
int index = aci.getBeginIndex();
int residx = 0;
while (true) {
if (aci.setIndex(index) == CharacterIterator.DONE) {
break;
}
attributes = aci.getAttributes();
if (attributes != null) {
int end = aci.getRunLimit();
Map jdkAttributes =
new HashMap();
for (Entry entry
: attributes.entrySet()) {
AttributedCharacterIterator.Attribute key = entry.getKey();
AttributedCharacterIterator.Attribute jdkKey = mapAttribute(key);
Object jdkVal = entry.getValue();
if (jdkVal instanceof AttributedCharacterIterator.Attribute) {
jdkVal = mapAttribute((AttributedCharacterIterator.Attribute)jdkVal);
}
jdkAttributes.put(jdkKey, jdkVal);
}
int resend = residx + (end - index);
resstr.addAttributes(jdkAttributes, residx, resend);
index = end;
residx = resend;
}
}
return resstr.getIterator();
}
@Override
public Date get2DigitYearStart() {
return fIcuSdf.get2DigitYearStart();
}
@Override
public DateFormatSymbols getDateFormatSymbols() {
return DateFormatSymbolsICU.wrap(fIcuSdf.getDateFormatSymbols());
}
@Override
public int hashCode() {
return fIcuSdf.hashCode();
}
@Override
public Date parse(String text, ParsePosition pos) {
return fIcuSdf.parse(text, pos);
}
@Override
public void set2DigitYearStart(Date startDate) {
fIcuSdf.set2DigitYearStart(startDate);
}
@Override
public void setDateFormatSymbols(DateFormatSymbols newFormatSymbols) {
com.ibm.icu.text.DateFormatSymbols icuDfs = null;
if (newFormatSymbols instanceof DateFormatSymbolsICU) {
icuDfs = ((DateFormatSymbolsICU)newFormatSymbols).unwrap();
} else if (fIcuSdf.getCalendar() instanceof com.ibm.icu.util.GregorianCalendar) {
// Java 6 uses DateFormatSymbols exclusively for Gregorian
// calendar.
String[] newJDK, curICU, newICU;
icuDfs = fIcuSdf.getDateFormatSymbols();
// Eras
newJDK = newFormatSymbols.getEras();
curICU = icuDfs.getEras();
newICU = copySymbols(newJDK, curICU, true);
// Months
newJDK = newFormatSymbols.getMonths();
curICU = icuDfs.getMonths();
newICU = copySymbols(newJDK, curICU, false);
icuDfs.setMonths(newICU);
// ShortMonths
newJDK = newFormatSymbols.getShortMonths();
curICU = icuDfs.getShortMonths();
newICU = copySymbols(newJDK, curICU, false);
icuDfs.setShortMonths(newICU);
// Weekdays
newJDK = newFormatSymbols.getWeekdays();
curICU = icuDfs.getWeekdays();
newICU = copySymbols(newJDK, curICU, false);
icuDfs.setWeekdays(newICU);
// ShortWeekdays
newJDK = newFormatSymbols.getShortWeekdays();
curICU = icuDfs.getShortWeekdays();
newICU = copySymbols(newJDK, curICU, false);
icuDfs.setShortWeekdays(newICU);
// AmPm
newJDK = newFormatSymbols.getAmPmStrings();
curICU = icuDfs.getAmPmStrings();
newICU = copySymbols(newJDK, curICU, false);
icuDfs.setAmPmStrings(newICU);
} else {
// For other calendars, JDK's standard DateFormatSymbols
// cannot be used.
throw new UnsupportedOperationException("JDK DateFormatSymbols cannot be used for the calendar type.");
}
fIcuSdf.setDateFormatSymbols(icuDfs);
}
@Override
public String toLocalizedPattern() {
return fIcuSdf.toLocalizedPattern();
}
@Override
public String toPattern() {
return fIcuSdf.toLocalizedPattern();
}
// Methods overriding java.text.DateFormat
@Override
public Calendar getCalendar() {
return CalendarICU.wrap(fIcuSdf.getCalendar());
}
@Override
public NumberFormat getNumberFormat() {
com.ibm.icu.text.NumberFormat nfmt = fIcuSdf.getNumberFormat();
if (nfmt instanceof NumberFormatJDK) {
return ((NumberFormatJDK)nfmt).unwrap();
}
if (nfmt instanceof com.ibm.icu.text.DecimalFormat) {
return DecimalFormatICU.wrap((com.ibm.icu.text.DecimalFormat)nfmt);
}
return NumberFormatICU.wrap(nfmt);
}
@Override
public TimeZone getTimeZone() {
return getCalendar().getTimeZone();
}
@Override
public boolean isLenient() {
return fIcuSdf.isLenient();
}
private static final long SAMPLE_TIME = 962409600000L; //2000-07-01T00:00:00Z
private static final int JAPANESE_YEAR = 12; // Japanese calendar year @ SAMPLE_TIME
private static final int THAI_YEAR = 2543; // Thai Buddhist calendar year @ SAMPLE_TIME
@Override
public void setCalendar(Calendar newCalendar) {
com.ibm.icu.util.Calendar icuCal = null;
if (newCalendar instanceof CalendarICU) {
icuCal = ((CalendarICU)newCalendar).unwrap();
} else {
// Note: There is no easy way to implement ICU Calendar with
// JDK Calendar implementation. For now, this code assumes
// the given calendar is either Gregorian, Buddhist or
// JapaneseImperial. Once the type is detected, this code
// creates an instance of ICU Calendar with the same type.
com.ibm.icu.util.TimeZone icuTz = TimeZoneJDK.wrap(newCalendar.getTimeZone());
if (newCalendar instanceof GregorianCalendar) {
icuCal = new com.ibm.icu.util.GregorianCalendar(icuTz);
} else {
newCalendar.setTimeInMillis(SAMPLE_TIME);
int year = newCalendar.get(Calendar.YEAR);
if (year == JAPANESE_YEAR) {
icuCal = new com.ibm.icu.util.JapaneseCalendar(icuTz);
} else if (year == THAI_YEAR) {
icuCal = new com.ibm.icu.util.BuddhistCalendar(icuTz);
} else {
// We cannot support the case
throw new UnsupportedOperationException("Unsupported calendar type by ICU Calendar adapter.");
}
}
// Copy the original calendar settings
icuCal.setFirstDayOfWeek(newCalendar.getFirstDayOfWeek());
icuCal.setLenient(newCalendar.isLenient());
icuCal.setMinimalDaysInFirstWeek(newCalendar.getMinimalDaysInFirstWeek());
}
fIcuSdf.setCalendar(icuCal);
}
@Override
public void setLenient(boolean lenient) {
fIcuSdf.setLenient(lenient);
}
@Override
public void setNumberFormat(NumberFormat newNumberFormat) {
if (newNumberFormat instanceof DecimalFormatICU) {
fIcuSdf.setNumberFormat(((DecimalFormatICU)newNumberFormat).unwrap());
} else if (newNumberFormat instanceof NumberFormatICU) {
fIcuSdf.setNumberFormat(((NumberFormatICU)newNumberFormat).unwrap());
} else {
fIcuSdf.setNumberFormat(NumberFormatJDK.wrap(newNumberFormat));
}
}
@Override
public void setTimeZone(TimeZone zone) {
fIcuSdf.setTimeZone(TimeZoneJDK.wrap(zone));
}
private String[] copySymbols(String[] newData, String[] curData, boolean alignEnd) {
if (newData.length >= curData.length) {
return newData;
}
int startOffset = alignEnd ? curData.length - newData.length : 0;
System.arraycopy(newData, 0, curData, startOffset, newData.length);
return curData;
}
private static AttributedCharacterIterator.Attribute mapAttribute(AttributedCharacterIterator.Attribute icuAttribute) {
AttributedCharacterIterator.Attribute jdkAttribute = icuAttribute;
if (icuAttribute == DateFormat.Field.AM_PM) {
jdkAttribute = java.text.DateFormat.Field.AM_PM;
} else if (icuAttribute == DateFormat.Field.DAY_OF_MONTH) {
jdkAttribute = java.text.DateFormat.Field.DAY_OF_MONTH;
} else if (icuAttribute == DateFormat.Field.DAY_OF_WEEK) {
jdkAttribute = java.text.DateFormat.Field.DAY_OF_WEEK;
} else if (icuAttribute == DateFormat.Field.DAY_OF_WEEK_IN_MONTH) {
jdkAttribute = java.text.DateFormat.Field.DAY_OF_WEEK_IN_MONTH;
} else if (icuAttribute == DateFormat.Field.DAY_OF_YEAR) {
jdkAttribute = java.text.DateFormat.Field.DAY_OF_YEAR;
} else if (icuAttribute == DateFormat.Field.ERA) {
jdkAttribute = java.text.DateFormat.Field.ERA;
} else if (icuAttribute == DateFormat.Field.HOUR_OF_DAY0) {
jdkAttribute = java.text.DateFormat.Field.HOUR_OF_DAY0;
} else if (icuAttribute == DateFormat.Field.HOUR_OF_DAY1) {
jdkAttribute = java.text.DateFormat.Field.HOUR_OF_DAY1;
} else if (icuAttribute == DateFormat.Field.HOUR0) {
jdkAttribute = java.text.DateFormat.Field.HOUR0;
} else if (icuAttribute == DateFormat.Field.HOUR1) {
jdkAttribute = java.text.DateFormat.Field.HOUR1;
} else if (icuAttribute == DateFormat.Field.MILLISECOND) {
jdkAttribute = java.text.DateFormat.Field.MILLISECOND;
} else if (icuAttribute == DateFormat.Field.MINUTE) {
jdkAttribute = java.text.DateFormat.Field.MINUTE;
} else if (icuAttribute == DateFormat.Field.MONTH) {
jdkAttribute = java.text.DateFormat.Field.MONTH;
} else if (icuAttribute == DateFormat.Field.SECOND) {
jdkAttribute = java.text.DateFormat.Field.SECOND;
} else if (icuAttribute == DateFormat.Field.TIME_ZONE) {
jdkAttribute = java.text.DateFormat.Field.TIME_ZONE;
} else if (icuAttribute == DateFormat.Field.WEEK_OF_MONTH) {
jdkAttribute = java.text.DateFormat.Field.WEEK_OF_MONTH;
} else if (icuAttribute == DateFormat.Field.WEEK_OF_YEAR) {
jdkAttribute = java.text.DateFormat.Field.WEEK_OF_YEAR;
} else if (icuAttribute == DateFormat.Field.YEAR) {
jdkAttribute = java.text.DateFormat.Field.YEAR;
}
// There are other DateFormat.Field constants defined in
// ICU4J DateFormat below.
//
// DOW_LOCAL
// EXTENDED_YEAR
// JULIAN_DAY
// MILLISECONDS_IN_DAY
// QUARTER
// YEAR_WOY
//
// However, the corresponding pattern characters are not used by
// the default factory method - getXXXInstance. So these constants
// are only used when user intentionally set a pattern including
// these ICU4J specific pattern letters. Even it happens,
// ICU4J's DateFormat.Field extends java.text.Format.Field, so
// it does not break the contract of formatToCharacterIterator.
return jdkAttribute;
}
}
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