Update class and add javadoc ready for release
git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/lang/trunk@137326 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Stephen Colebourne
parent
378587735d
commit
6d4516cccc
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@ -53,108 +53,129 @@
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*/
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package org.apache.commons.lang.time;
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import java.util.Date;
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import java.util.Calendar;
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import java.util.GregorianCalendar;
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import java.util.Locale;
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import java.util.TimeZone;
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import java.util.List;
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import java.util.ArrayList;
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import java.util.Map;
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import java.util.HashMap;
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import java.text.DateFormatSymbols;
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import java.io.Serializable;
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import java.text.DateFormat;
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import java.text.DateFormatSymbols;
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import java.text.FieldPosition;
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import java.text.Format;
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import java.text.ParsePosition;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.GregorianCalendar;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Locale;
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import java.util.Map;
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import java.util.TimeZone;
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/**
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* Similar to {@link java.text.SimpleDateFormat}, but faster and thread-safe.
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* FastDateFormat is similar to {@link java.text.SimpleDateFormat}, but
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* faster and thread-safe.
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* <p>
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* Only formatting is supported, but all patterns are compatible with
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* SimpleDateFormat. [Code originally taken from the open source TreeTrove
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* project.]
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* SimpleDateFormat.
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* <p>
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* NOTE: Code originally taken from the open source TreeTrove project.
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*
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* @author Brian S O'Neill
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* @author Sean Schofield
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* @author Gary Gregory
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* @since 2.1
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* @version $Id: FastDateFormat.java,v 1.4 2003/02/04 22:19:33 scolebourne Exp $
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* @author Stephen Colebourne
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* @since 2.0
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* @version $Id: FastDateFormat.java,v 1.5 2003/05/21 23:39:53 scolebourne Exp $
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*/
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public class FastDateFormat {
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/** Style pattern */
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public static final Object
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FULL = new Integer(SimpleDateFormat.FULL),
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LONG = new Integer(SimpleDateFormat.LONG),
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MEDIUM = new Integer(SimpleDateFormat.MEDIUM),
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SHORT = new Integer(SimpleDateFormat.SHORT);
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public class FastDateFormat extends Format {
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/** FULL date or time style */
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public static final int FULL = SimpleDateFormat.FULL;
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/** LONG date or time style */
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public static final int LONG = SimpleDateFormat.LONG;
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/** MEDIUM date or time style */
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public static final int MEDIUM = SimpleDateFormat.MEDIUM;
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/** SHORT date or time style */
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public static final int SHORT = SimpleDateFormat.SHORT;
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// package scoped as used by inner class
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static final double LOG_10 = Math.log(10);
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private static String cDefaultPattern;
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private static TimeZone cDefaultTimeZone = TimeZone.getDefault();
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private static Map cTimeZoneDisplayCache = new HashMap();
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private static Map cInstanceCache = new HashMap(7);
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private static Map cDateInstanceCache = new HashMap(7);
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private static Map cTimeInstanceCache = new HashMap(7);
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private static Map cDateTimeInstanceCache = new HashMap(7);
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private static Map cTimeZoneDisplayCache = new HashMap(7);
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/** The pattern */
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private final String mPattern;
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/** The time zone */
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private final TimeZone mTimeZone;
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/** The locale */
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private final Locale mLocale;
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/** The parsed rules */
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private final Rule[] mRules;
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/** The estimated maximum length */
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private final int mMaxLengthEstimate;
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//-----------------------------------------------------------------------
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/**
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* Gets a formatter instance using the default pattern in the default locale.
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*
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* @return a date/time formatter
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*/
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public static FastDateFormat getInstance() {
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//return getInstance(getDefaultPattern(), null, null, null);
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return getInstance(getDefaultPattern(), null, null);
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}
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/**
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* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
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* Gets a formatter instance using the specified pattern in the default locale.
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*
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* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
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* @return a pattern based date/time formatter
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* @throws IllegalArgumentException if pattern is invalid
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*/
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public static FastDateFormat getInstance(String pattern) {
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//return getInstance(pattern, null, null, null);
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return getInstance(pattern, null, null);
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}
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/**
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* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
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* @param timeZone optional time zone, overrides time zone of formatted
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* date
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* Gets a formatter instance using the specified pattern and time zone.
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*
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* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
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* @param timeZone optional time zone, overrides time zone of formatted date
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* @return a pattern based date/time formatter
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* @throws IllegalArgumentException if pattern is invalid
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*/
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public static FastDateFormat getInstance(String pattern, TimeZone timeZone) {
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//return getInstance(pattern, timeZone, null, null);
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return getInstance(pattern, timeZone, null);
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}
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/**
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* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
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* @param locale optional locale, overrides system locale
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* Gets a formatter instance using the specified pattern and locale.
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*
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* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
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* @param locale optional locale, overrides system locale
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* @return a pattern based date/time formatter
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* @throws IllegalArgumentException if pattern is invalid
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*/
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public static FastDateFormat getInstance(String pattern, Locale locale) {
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//return getInstance(pattern, null, locale, null);
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return getInstance(pattern, null, locale);
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}
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/**
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* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
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* @param symbols optional date format symbols, overrides symbols for
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* system locale
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* Gets a formatter instance using the specified pattern, time zone and locale.
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*
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* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
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* @param timeZone optional time zone, overrides time zone of formatted date
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* @param locale optional locale, overrides system locale
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* @return a pattern based date/time formatter
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* @throws IllegalArgumentException if pattern is invalid
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*/
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/*
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public static FastDateFormat getInstance
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(String pattern, DateFormatSymbols symbols)
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throws IllegalArgumentException
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{
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return getInstance(pattern, null, null, symbols);
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}
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*/
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/**
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* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
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* @param timeZone optional time zone, overrides time zone of formatted
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* date
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* @param locale optional locale, overrides system locale
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*/
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public static FastDateFormat getInstance(String pattern, TimeZone timeZone, Locale locale) {
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//return getInstance(pattern, timeZone, locale, null);
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public static synchronized FastDateFormat getInstance(String pattern, TimeZone timeZone, Locale locale) {
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Object key = pattern;
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if (timeZone != null) {
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key = new Pair(key, timeZone);
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}
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@ -162,7 +183,7 @@ public class FastDateFormat {
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key = new Pair(key, locale);
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}
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FastDateFormat format = (FastDateFormat)cInstanceCache.get(key);
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FastDateFormat format = (FastDateFormat) cInstanceCache.get(key);
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if (format == null) {
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if (locale == null) {
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locale = Locale.getDefault();
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@ -175,55 +196,16 @@ public class FastDateFormat {
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}
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/**
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* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
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* @param timeZone optional time zone, overrides time zone of formatted
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* date
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* @param locale optional locale, overrides system locale
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* @param symbols optional date format symbols, overrides symbols for
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* provided locale
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*/
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/*
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public static synchronized FastDateFormat getInstance
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(String pattern, TimeZone timeZone, Locale locale,
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DateFormatSymbols symbols)
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throws IllegalArgumentException
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{
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Object key = pattern;
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if (timeZone != null) {
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key = new Pair(key, timeZone);
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}
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if (locale != null) {
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key = new Pair(key, locale);
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}
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if (symbols != null) {
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key = new Pair(key, symbols);
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}
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FastDateFormat format = (FastDateFormat)cInstanceCache.get(key);
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if (format == null) {
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if (locale == null) {
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locale = Locale.getDefault();
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}
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if (symbols == null) {
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symbols = new DateFormatSymbols(locale);
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}
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format = new FastDateFormat(pattern, timeZone, locale, symbols);
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cInstanceCache.put(key, format);
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}
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return format;
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}
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*/
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/**
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* @param style date style: FULL, LONG, MEDIUM, or SHORT (corresponds to those in java.text.DateFormat)
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* @param timeZone optional time zone, overrides time zone of formatted
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* date
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* @param locale optional locale, overrides system locale
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* Gets a date formatter instance using the specified style, time zone and locale.
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*
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* @param style date style: FULL, LONG, MEDIUM, or SHORT
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* @param timeZone optional time zone, overrides time zone of formatted date
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* @param locale optional locale, overrides system locale
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* @return a localized standard date formatter
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* @throws IllegalArgumentException if the Locale has no date pattern defined
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*/
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public static synchronized FastDateFormat getDateInstance(int style, TimeZone timeZone, Locale locale) {
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Object key = new Integer(style);
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if (timeZone != null) {
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key = new Pair(key, timeZone);
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}
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@ -231,36 +213,36 @@ public class FastDateFormat {
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key = new Pair(key, locale);
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}
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FastDateFormat format = (FastDateFormat)cDateInstanceCache.get(key);
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FastDateFormat format = (FastDateFormat) cDateInstanceCache.get(key);
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if (format == null) {
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if (locale == null) {
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locale = Locale.getDefault();
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}
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try {
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String pattern = ((SimpleDateFormat)DateFormat.getDateInstance(style, locale)).toPattern();
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SimpleDateFormat formatter = (SimpleDateFormat) DateFormat.getDateInstance(style, locale);
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String pattern = formatter.toPattern();
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format = getInstance(pattern, timeZone, locale);
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cDateInstanceCache.put(key, format);
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}
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catch (ClassCastException e) {
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throw new IllegalArgumentException
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("No date pattern for locale: " + locale);
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} catch (ClassCastException ex) {
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throw new IllegalArgumentException("No date pattern for locale: " + locale);
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}
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}
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return format;
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}
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/**
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* @param style time style: FULL, LONG, MEDIUM, or SHORT
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* @param timeZone optional time zone, overrides time zone of formatted
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* date
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* @param locale optional locale, overrides system locale
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* Gets a time formatter instance using the specified style, time zone and locale.
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*
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* @param style time style: FULL, LONG, MEDIUM, or SHORT
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* @param timeZone optional time zone, overrides time zone of formatted time
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* @param locale optional locale, overrides system locale
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* @return a localized standard time formatter
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* @throws IllegalArgumentException if the Locale has no time pattern defined
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*/
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public static synchronized FastDateFormat getTimeInstance(int style, TimeZone timeZone, Locale locale) {
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Object key = new Integer(style);
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if (timeZone != null) {
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key = new Pair(key, timeZone);
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}
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@ -268,40 +250,39 @@ public class FastDateFormat {
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key = new Pair(key, locale);
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}
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FastDateFormat format = (FastDateFormat)cTimeInstanceCache.get(key);
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FastDateFormat format = (FastDateFormat) cTimeInstanceCache.get(key);
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if (format == null) {
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if (locale == null) {
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locale = Locale.getDefault();
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}
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try {
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String pattern = ((SimpleDateFormat)DateFormat.getTimeInstance(style, locale)).toPattern();
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SimpleDateFormat formatter = (SimpleDateFormat) DateFormat.getTimeInstance(style, locale);
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String pattern = formatter.toPattern();
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format = getInstance(pattern, timeZone, locale);
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cTimeInstanceCache.put(key, format);
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}
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catch (ClassCastException e) {
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throw new IllegalArgumentException
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("No date pattern for locale: " + locale);
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} catch (ClassCastException ex) {
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throw new IllegalArgumentException("No date pattern for locale: " + locale);
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}
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}
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return format;
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}
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/**
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* @param dateStyle date style: FULL, LONG, MEDIUM, or SHORT
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* @param timeStyle time style: FULL, LONG, MEDIUM, or SHORT
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* @param timeZone optional time zone, overrides time zone of formatted
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* date
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* @param locale optional locale, overrides system locale
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* Gets a date/time formatter instance using the specified style, time zone and locale.
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*
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* @param dateStyle date style: FULL, LONG, MEDIUM, or SHORT
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* @param timeStyle time style: FULL, LONG, MEDIUM, or SHORT
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* @param timeZone optional time zone, overrides time zone of formatted date
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* @param locale optional locale, overrides system locale
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* @return a localized standard date/time formatter
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* @throws IllegalArgumentException if the Locale has no date/time pattern defined
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*/
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public static synchronized FastDateFormat getDateTimeInstance(Object dateStyle, Object timeStyle,
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TimeZone timeZone, Locale locale) {
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Object key = new Pair(dateStyle, timeStyle);
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public static synchronized FastDateFormat getDateTimeInstance(
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int dateStyle, int timeStyle, TimeZone timeZone, Locale locale) {
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Object key = new Pair(new Integer(dateStyle), new Integer(timeStyle));
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if (timeZone != null) {
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key = new Pair(key, timeZone);
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}
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@ -309,49 +290,38 @@ public class FastDateFormat {
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key = new Pair(key, locale);
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}
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FastDateFormat format =
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(FastDateFormat)cDateTimeInstanceCache.get(key);
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FastDateFormat format = (FastDateFormat) cDateTimeInstanceCache.get(key);
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if (format == null) {
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int ds;
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try {
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ds = ((Integer)dateStyle).intValue();
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}
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catch (ClassCastException e) {
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throw new IllegalArgumentException
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("Illegal date style: " + dateStyle);
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}
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int ts;
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try {
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ts = ((Integer)timeStyle).intValue();
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}
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catch (ClassCastException e) {
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throw new IllegalArgumentException
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("Illegal time style: " + timeStyle);
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}
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if (locale == null) {
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locale = Locale.getDefault();
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}
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try {
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String pattern = ((SimpleDateFormat)DateFormat.getDateTimeInstance(ds, ts, locale)).toPattern();
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SimpleDateFormat formatter = (SimpleDateFormat) DateFormat.getDateTimeInstance(dateStyle, timeStyle, locale);
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String pattern = formatter.toPattern();
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format = getInstance(pattern, timeZone, locale);
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cDateTimeInstanceCache.put(key, format);
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}
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catch (ClassCastException e) {
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throw new IllegalArgumentException
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("No date time pattern for locale: " + locale);
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} catch (ClassCastException ex) {
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throw new IllegalArgumentException("No date time pattern for locale: " + locale);
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}
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}
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return format;
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}
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//-----------------------------------------------------------------------
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/**
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* Gets the time zone display name, using a cache for performance.
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*
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* @param tz the zone to query
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* @param daylight true if daylight savings
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* @param style the style to use TimeZone.LONG or TimeZone.SHORT
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* @param locale the locale to use
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* @return the textual name of the time zone
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*/
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static synchronized String getTimeZoneDisplay(TimeZone tz, boolean daylight, int style, Locale locale) {
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Object key = new TimeZoneDisplayKey(tz, daylight, style, locale);
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String value = (String)cTimeZoneDisplayCache.get(key);
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String value = (String) cTimeZoneDisplayCache.get(key);
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if (value == null) {
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// This is a very slow call, so cache the results.
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value = tz.getDisplayName(daylight, style, locale);
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@ -360,6 +330,11 @@ public class FastDateFormat {
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return value;
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}
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/**
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* Gets the default pattern.
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*
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* @return the default pattern
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*/
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private static synchronized String getDefaultPattern() {
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if (cDefaultPattern == null) {
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cDefaultPattern = new SimpleDateFormat().toPattern();
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@ -368,7 +343,14 @@ public class FastDateFormat {
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}
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/**
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* Returns a list of Rules.
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* Returns a list of Rules given a pattern.
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*
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* @param pattern the pattern to parse
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* @param timeZone the time zone to use
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* @param locale the locale to use
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* @param symbols the symbols to use
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* @return a List of Rule objects
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* @throws IllegalArgumentException if pattern is invalid
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*/
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private static List parse(String pattern, TimeZone timeZone, Locale locale, DateFormatSymbols symbols) {
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List rules = new ArrayList();
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@ -383,7 +365,7 @@ public class FastDateFormat {
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int length = pattern.length();
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int[] indexRef = new int[1];
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for (int i=0; i<length; i++) {
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for (int i = 0; i < length; i++) {
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indexRef[0] = i;
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String token = parseToken(pattern, indexRef);
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i = indexRef[0];
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@ -403,22 +385,18 @@ public class FastDateFormat {
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case 'y': // year (number)
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if (tokenLen >= 4) {
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rule = new UnpaddedNumberField(Calendar.YEAR);
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}
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else {
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} else {
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rule = new TwoDigitYearField();
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}
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break;
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case 'M': // month in year (text and number)
|
||||
if (tokenLen >= 4) {
|
||||
rule = new TextField(Calendar.MONTH, months);
|
||||
}
|
||||
else if (tokenLen == 3) {
|
||||
} else if (tokenLen == 3) {
|
||||
rule = new TextField(Calendar.MONTH, shortMonths);
|
||||
}
|
||||
else if (tokenLen == 2) {
|
||||
} else if (tokenLen == 2) {
|
||||
rule = new TwoDigitMonthField();
|
||||
}
|
||||
else {
|
||||
} else {
|
||||
rule = new UnpaddedMonthField();
|
||||
}
|
||||
break;
|
||||
|
|
@ -426,8 +404,7 @@ public class FastDateFormat {
|
|||
rule = selectNumberRule(Calendar.DAY_OF_MONTH, tokenLen);
|
||||
break;
|
||||
case 'h': // hour in am/pm (number, 1..12)
|
||||
rule = new TwelveHourField
|
||||
(selectNumberRule(Calendar.HOUR, tokenLen));
|
||||
rule = new TwelveHourField(selectNumberRule(Calendar.HOUR, tokenLen));
|
||||
break;
|
||||
case 'H': // hour in day (number, 0..23)
|
||||
rule = selectNumberRule(Calendar.HOUR_OF_DAY, tokenLen);
|
||||
|
|
@ -442,16 +419,13 @@ public class FastDateFormat {
|
|||
rule = selectNumberRule(Calendar.MILLISECOND, tokenLen);
|
||||
break;
|
||||
case 'E': // day in week (text)
|
||||
rule = new TextField
|
||||
(Calendar.DAY_OF_WEEK,
|
||||
tokenLen < 4 ? shortWeekdays : weekdays);
|
||||
rule = new TextField(Calendar.DAY_OF_WEEK, tokenLen < 4 ? shortWeekdays : weekdays);
|
||||
break;
|
||||
case 'D': // day in year (number)
|
||||
rule = selectNumberRule(Calendar.DAY_OF_YEAR, tokenLen);
|
||||
break;
|
||||
case 'F': // day of week in month (number)
|
||||
rule = selectNumberRule
|
||||
(Calendar.DAY_OF_WEEK_IN_MONTH, tokenLen);
|
||||
rule = selectNumberRule(Calendar.DAY_OF_WEEK_IN_MONTH, tokenLen);
|
||||
break;
|
||||
case 'w': // week in year (number)
|
||||
rule = selectNumberRule(Calendar.WEEK_OF_YEAR, tokenLen);
|
||||
|
|
@ -463,8 +437,7 @@ public class FastDateFormat {
|
|||
rule = new TextField(Calendar.AM_PM, AmPmStrings);
|
||||
break;
|
||||
case 'k': // hour in day (1..24)
|
||||
rule = new TwentyFourHourField
|
||||
(selectNumberRule(Calendar.HOUR_OF_DAY, tokenLen));
|
||||
rule = new TwentyFourHourField(selectNumberRule(Calendar.HOUR_OF_DAY, tokenLen));
|
||||
break;
|
||||
case 'K': // hour in am/pm (0..11)
|
||||
rule = selectNumberRule(Calendar.HOUR, tokenLen);
|
||||
|
|
@ -472,8 +445,7 @@ public class FastDateFormat {
|
|||
case 'z': // time zone (text)
|
||||
if (tokenLen >= 4) {
|
||||
rule = new TimeZoneRule(timeZone, locale, TimeZone.LONG);
|
||||
}
|
||||
else {
|
||||
} else {
|
||||
rule = new TimeZoneRule(timeZone, locale, TimeZone.SHORT);
|
||||
}
|
||||
break;
|
||||
|
|
@ -481,14 +453,12 @@ public class FastDateFormat {
|
|||
String sub = token.substring(1);
|
||||
if (sub.length() == 1) {
|
||||
rule = new CharacterLiteral(sub.charAt(0));
|
||||
}
|
||||
else {
|
||||
} else {
|
||||
rule = new StringLiteral(new String(sub));
|
||||
}
|
||||
break;
|
||||
default:
|
||||
throw new IllegalArgumentException
|
||||
("Illegal pattern component: " + token);
|
||||
throw new IllegalArgumentException("Illegal pattern component: " + token);
|
||||
}
|
||||
|
||||
rules.add(rule);
|
||||
|
|
@ -497,6 +467,13 @@ public class FastDateFormat {
|
|||
return rules;
|
||||
}
|
||||
|
||||
/**
|
||||
* Performs the parsing of tokens.
|
||||
*
|
||||
* @param pattern the pattern
|
||||
* @param indexRef index references
|
||||
* @return parsed token
|
||||
*/
|
||||
private static String parseToken(String pattern, int[] indexRef) {
|
||||
StringBuffer buf = new StringBuffer();
|
||||
|
||||
|
|
@ -514,13 +491,11 @@ public class FastDateFormat {
|
|||
if (peek == c) {
|
||||
buf.append(c);
|
||||
i++;
|
||||
}
|
||||
else {
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
else {
|
||||
} else {
|
||||
// This will identify token as text.
|
||||
buf.append('\'');
|
||||
|
||||
|
|
@ -534,17 +509,14 @@ public class FastDateFormat {
|
|||
// '' is treated as escaped '
|
||||
i++;
|
||||
buf.append(c);
|
||||
}
|
||||
else {
|
||||
} else {
|
||||
inLiteral = !inLiteral;
|
||||
}
|
||||
}
|
||||
else if (!inLiteral &&
|
||||
} else if (!inLiteral &&
|
||||
(c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z')) {
|
||||
i--;
|
||||
break;
|
||||
}
|
||||
else {
|
||||
} else {
|
||||
buf.append(c);
|
||||
}
|
||||
}
|
||||
|
|
@ -554,6 +526,13 @@ public class FastDateFormat {
|
|||
return buf.toString();
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets an appropriate rule for the padding required.
|
||||
*
|
||||
* @param field the field to get a rule for
|
||||
* @param padding the padding required
|
||||
* @return a new rule with the correct padding
|
||||
*/
|
||||
private static NumberRule selectNumberRule(int field, int padding) {
|
||||
switch (padding) {
|
||||
case 1:
|
||||
|
|
@ -565,66 +544,15 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
private final String mPattern;
|
||||
private final TimeZone mTimeZone;
|
||||
private final Locale mLocale;
|
||||
private final Rule[] mRules;
|
||||
private final int mMaxLengthEstimate;
|
||||
|
||||
private FastDateFormat() {
|
||||
this(getDefaultPattern(), null, null, null);
|
||||
}
|
||||
|
||||
//-----------------------------------------------------------------------
|
||||
/**
|
||||
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
|
||||
*/
|
||||
private FastDateFormat(String pattern) throws IllegalArgumentException {
|
||||
this(pattern, null, null, null);
|
||||
}
|
||||
|
||||
/**
|
||||
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
|
||||
* @param timeZone optional time zone, overrides time zone of formatted
|
||||
* date
|
||||
*/
|
||||
private FastDateFormat(String pattern, TimeZone timeZone) {
|
||||
this(pattern, timeZone, null, null);
|
||||
}
|
||||
|
||||
/**
|
||||
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
|
||||
* @param locale optional locale, overrides system locale
|
||||
*/
|
||||
private FastDateFormat(String pattern, Locale locale) {
|
||||
this(pattern, null, locale, null);
|
||||
}
|
||||
|
||||
/**
|
||||
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
|
||||
* @param symbols optional date format symbols, overrides symbols for
|
||||
* system locale
|
||||
*/
|
||||
private FastDateFormat(String pattern, DateFormatSymbols symbols) {
|
||||
this(pattern, null, null, symbols);
|
||||
}
|
||||
|
||||
/**
|
||||
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
|
||||
* @param timeZone optional time zone, overrides time zone of formatted
|
||||
* date
|
||||
* @param locale optional locale, overrides system locale
|
||||
*/
|
||||
private FastDateFormat(String pattern, TimeZone timeZone, Locale locale) {
|
||||
this(pattern, timeZone, locale, null);
|
||||
}
|
||||
|
||||
/**
|
||||
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
|
||||
* @param timeZone optional time zone, overrides time zone of formatted
|
||||
* date
|
||||
* @param locale optional locale, overrides system locale
|
||||
* @param symbols optional date format symbols, overrides symbols for
|
||||
* provided locale
|
||||
* Constructs a new FastDateFormat.
|
||||
*
|
||||
* @param pattern {@link java.text.SimpleDateFormat} compatible pattern
|
||||
* @param timeZone optional time zone, overrides time zone of formatted date
|
||||
* @param locale optional locale, overrides system locale
|
||||
* @param symbols optional date format symbols, overrides symbols for provided locale
|
||||
* @throws IllegalArgumentException if pattern is invalid
|
||||
*/
|
||||
private FastDateFormat(String pattern, TimeZone timeZone, Locale locale, DateFormatSymbols symbols) {
|
||||
if (locale == null) {
|
||||
|
|
@ -640,7 +568,7 @@ public class FastDateFormat {
|
|||
}
|
||||
|
||||
List rulesList = parse(pattern, timeZone, locale, symbols);
|
||||
mRules = (Rule[])rulesList.toArray(new Rule[rulesList.size()]);
|
||||
mRules = (Rule[]) rulesList.toArray(new Rule[rulesList.size()]);
|
||||
|
||||
int len = 0;
|
||||
for (int i=mRules.length; --i >= 0; ) {
|
||||
|
|
@ -650,6 +578,32 @@ public class FastDateFormat {
|
|||
mMaxLengthEstimate = len;
|
||||
}
|
||||
|
||||
//-----------------------------------------------------------------------
|
||||
/**
|
||||
* Format either a Date or a Calendar object.
|
||||
*
|
||||
* @param obj the object to format
|
||||
* @param toAppendTo the buffer to append to
|
||||
* @param pos the position - ignored
|
||||
* @return the buffer passed in
|
||||
*/
|
||||
public StringBuffer format(Object obj, StringBuffer toAppendTo, FieldPosition pos) {
|
||||
if (obj instanceof Date) {
|
||||
return format((Date) obj, toAppendTo);
|
||||
} else if (obj instanceof Calendar) {
|
||||
return format((Calendar) obj, toAppendTo);
|
||||
} else {
|
||||
throw new IllegalArgumentException("Unknown class: " +
|
||||
(obj == null ? "<null>" : obj.getClass().getName()));
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Formats a Date object.
|
||||
*
|
||||
* @param date the date to format
|
||||
* @return the formatted string
|
||||
*/
|
||||
public String format(Date date) {
|
||||
Calendar c = new GregorianCalendar(cDefaultTimeZone);
|
||||
c.setTime(date);
|
||||
|
|
@ -659,11 +613,23 @@ public class FastDateFormat {
|
|||
return applyRules(c, new StringBuffer(mMaxLengthEstimate)).toString();
|
||||
}
|
||||
|
||||
/**
|
||||
* Formats a Calendar object.
|
||||
*
|
||||
* @param calendar the calendar to format
|
||||
* @return the formatted string
|
||||
*/
|
||||
public String format(Calendar calendar) {
|
||||
return format(calendar, new StringBuffer(mMaxLengthEstimate))
|
||||
.toString();
|
||||
return format(calendar, new StringBuffer(mMaxLengthEstimate)).toString();
|
||||
}
|
||||
|
||||
/**
|
||||
* Formats a Date object into the supplied StringBuffer.
|
||||
*
|
||||
* @param date the date to format
|
||||
* @param buf the buffer to format into
|
||||
* @return the specified string buffer
|
||||
*/
|
||||
public StringBuffer format(Date date, StringBuffer buf) {
|
||||
Calendar c = new GregorianCalendar(cDefaultTimeZone);
|
||||
c.setTime(date);
|
||||
|
|
@ -673,6 +639,13 @@ public class FastDateFormat {
|
|||
return applyRules(c, buf);
|
||||
}
|
||||
|
||||
/**
|
||||
* Formats a Calendar object into the supplied StringBuffer.
|
||||
*
|
||||
* @param calendar the calendar to format
|
||||
* @param buf the buffer to format into
|
||||
* @return the specified string buffer
|
||||
*/
|
||||
public StringBuffer format(Calendar calendar, StringBuffer buf) {
|
||||
if (mTimeZone != null) {
|
||||
calendar = (Calendar)calendar.clone();
|
||||
|
|
@ -681,50 +654,94 @@ public class FastDateFormat {
|
|||
return applyRules(calendar, buf);
|
||||
}
|
||||
|
||||
/**
|
||||
* Performs the formatting by applying the rules to the specified calendar.
|
||||
*
|
||||
* @param calendar the calendar to format
|
||||
* @param buf the buffer to format into
|
||||
* @return the specified string buffer
|
||||
*/
|
||||
private StringBuffer applyRules(Calendar calendar, StringBuffer buf) {
|
||||
Rule[] rules = mRules;
|
||||
int len = mRules.length;
|
||||
for (int i=0; i<len; i++) {
|
||||
for (int i = 0; i < len; i++) {
|
||||
rules[i].appendTo(buf, calendar);
|
||||
}
|
||||
return buf;
|
||||
}
|
||||
|
||||
//-----------------------------------------------------------------------
|
||||
/**
|
||||
* Parsing not supported.
|
||||
*
|
||||
* @param source the string to parse
|
||||
* @param pos the parsing position
|
||||
* @return null as not supported
|
||||
*/
|
||||
public Object parseObject(String source, ParsePosition pos) {
|
||||
pos.setIndex(0);
|
||||
pos.setErrorIndex(0);
|
||||
return null;
|
||||
}
|
||||
|
||||
//-----------------------------------------------------------------------
|
||||
/**
|
||||
* Gets the pattern used by this formatter.
|
||||
*
|
||||
* @return the pattern, {@link java.text.SimpleDateFormat} compatible
|
||||
*/
|
||||
public String getPattern() {
|
||||
return mPattern;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the time zone used by this formatter, or null if time zone of
|
||||
* Gets the time zone used by this formatter, or null if time zone of
|
||||
* formatted dates is used instead.
|
||||
*
|
||||
* @return the time zone
|
||||
*/
|
||||
public TimeZone getTimeZone() {
|
||||
return mTimeZone;
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets the locale used by this formatter.
|
||||
*
|
||||
* @return the locale
|
||||
*/
|
||||
public Locale getLocale() {
|
||||
return mLocale;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns an estimate for the maximum length date that this date
|
||||
* formatter will produce. The actual formatted length will almost always
|
||||
* be less than or equal to this amount.
|
||||
* Gets an estimate for the maximum string length that the formatter will produce.
|
||||
* The actual formatted length will almost always be less than or equal to this amount.
|
||||
*
|
||||
* @return the maximum formatted length
|
||||
*/
|
||||
public int getMaxLengthEstimate() {
|
||||
return mMaxLengthEstimate;
|
||||
}
|
||||
|
||||
//-----------------------------------------------------------------------
|
||||
/**
|
||||
* Inner class defining a rule.
|
||||
*/
|
||||
private interface Rule {
|
||||
int estimateLength();
|
||||
|
||||
void appendTo(StringBuffer buffer, Calendar calendar);
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class defining a numeric rule.
|
||||
*/
|
||||
private interface NumberRule extends Rule {
|
||||
void appendTo(StringBuffer buffer, int value);
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class to output a constant single character.
|
||||
*/
|
||||
private static class CharacterLiteral implements Rule {
|
||||
private final char mValue;
|
||||
|
||||
|
|
@ -741,6 +758,9 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class to output a constant string.
|
||||
*/
|
||||
private static class StringLiteral implements Rule {
|
||||
private final String mValue;
|
||||
|
||||
|
|
@ -757,6 +777,9 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class to output one of a set of values.
|
||||
*/
|
||||
private static class TextField implements Rule {
|
||||
private final int mField;
|
||||
private final String[] mValues;
|
||||
|
|
@ -782,6 +805,9 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class to output an unpadded number.
|
||||
*/
|
||||
private static class UnpaddedNumberField implements NumberRule {
|
||||
private final int mField;
|
||||
|
||||
|
|
@ -811,6 +837,9 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class to output an unpadded month.
|
||||
*/
|
||||
private static class UnpaddedMonthField implements NumberRule {
|
||||
UnpaddedMonthField() {
|
||||
}
|
||||
|
|
@ -834,6 +863,9 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class to output a padded number.
|
||||
*/
|
||||
private static class PaddedNumberField implements NumberRule {
|
||||
private final int mField;
|
||||
private final int mSize;
|
||||
|
|
@ -879,6 +911,9 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class to output a two digit number.
|
||||
*/
|
||||
private static class TwoDigitNumberField implements NumberRule {
|
||||
private final int mField;
|
||||
|
||||
|
|
@ -905,6 +940,9 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class to output a two digit year.
|
||||
*/
|
||||
private static class TwoDigitYearField implements NumberRule {
|
||||
TwoDigitYearField() {
|
||||
}
|
||||
|
|
@ -923,6 +961,9 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class to output a two digit month.
|
||||
*/
|
||||
private static class TwoDigitMonthField implements NumberRule {
|
||||
TwoDigitMonthField() {
|
||||
}
|
||||
|
|
@ -941,6 +982,9 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class to output the twelve hour field.
|
||||
*/
|
||||
private static class TwelveHourField implements NumberRule {
|
||||
private final NumberRule mRule;
|
||||
|
||||
|
|
@ -965,6 +1009,9 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class to output the twenty four hour field.
|
||||
*/
|
||||
private static class TwentyFourHourField implements NumberRule {
|
||||
private final NumberRule mRule;
|
||||
|
||||
|
|
@ -989,6 +1036,9 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inner class to output a time zone.
|
||||
*/
|
||||
private static class TimeZoneRule implements Rule {
|
||||
private final TimeZone mTimeZone;
|
||||
private final Locale mLocale;
|
||||
|
|
@ -1051,6 +1101,10 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
// ----------------------------------------------------------------------------------
|
||||
/**
|
||||
* Inner class that acts as a compound key for time zone names.
|
||||
*/
|
||||
private static class TimeZoneDisplayKey {
|
||||
private final TimeZone mTimeZone;
|
||||
private final int mStyle;
|
||||
|
|
@ -1085,13 +1139,12 @@ public class FastDateFormat {
|
|||
}
|
||||
}
|
||||
|
||||
// Pair
|
||||
// ----------------------------------------------------------------------------------
|
||||
/**
|
||||
* Helper class for creating compound objects. One use for this class is to create a
|
||||
* hashtable key out of multiple objects.
|
||||
*/
|
||||
private static class Pair implements Comparable, java.io.Serializable {
|
||||
private static class Pair implements Comparable, Serializable {
|
||||
private final Object mObj1;
|
||||
private final Object mObj2;
|
||||
|
||||
|
|
@ -1178,4 +1231,5 @@ public class FastDateFormat {
|
|||
return "[" + mObj1 + ':' + mObj2 + ']';
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue