Better local variable name
This commit is contained in:
Gary Gregory
parent
075b3e1a40
commit
b3eebfae44
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@ -44,32 +44,37 @@ import java.util.regex.Pattern;
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import org.apache.commons.lang3.LocaleUtils;
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/**
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* FastDateParser is a fast and thread-safe version of
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* {@link java.text.SimpleDateFormat}.
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* FastDateParser is a fast and thread-safe version of {@link java.text.SimpleDateFormat}.
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*
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* <p>To obtain a proxy to a FastDateParser, use {@link FastDateFormat#getInstance(String, TimeZone, Locale)}
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* or another variation of the factory methods of {@link FastDateFormat}.</p>
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* <p>
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* To obtain a proxy to a FastDateParser, use {@link FastDateFormat#getInstance(String, TimeZone, Locale)} or another variation of the factory methods of
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* {@link FastDateFormat}.
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* </p>
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*
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* <p>Since FastDateParser is thread safe, you can use a static member instance:</p>
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* <p>
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* Since FastDateParser is thread safe, you can use a static member instance:
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* </p>
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* <code>
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* private static final DateParser DATE_PARSER = FastDateFormat.getInstance("yyyy-MM-dd");
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* </code>
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*
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* <p>This class can be used as a direct replacement for
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* {@link SimpleDateFormat} in most parsing situations.
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* This class is especially useful in multi-threaded server environments.
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* {@link SimpleDateFormat} is not thread-safe in any JDK version,
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* nor will it be as Sun has closed the
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* <p>
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* This class can be used as a direct replacement for {@link SimpleDateFormat} in most parsing situations. This class is especially useful in multi-threaded
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* server environments. {@link SimpleDateFormat} is not thread-safe in any JDK version, nor will it be as Sun has closed the
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* <a href="https://bugs.openjdk.org/browse/JDK-4228335">bug</a>/RFE.
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* </p>
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*
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* <p>Only parsing is supported by this class, but all patterns are compatible with
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* SimpleDateFormat.</p>
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* <p>
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* Only parsing is supported by this class, but all patterns are compatible with SimpleDateFormat.
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* </p>
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*
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* <p>The class operates in lenient mode, so for example a time of 90 minutes is treated as 1 hour 30 minutes.</p>
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* <p>
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* The class operates in lenient mode, so for example a time of 90 minutes is treated as 1 hour 30 minutes.
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* </p>
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*
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* <p>Timing tests indicate this class is as about as fast as SimpleDateFormat
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* in single thread applications and about 25% faster in multi-thread applications.</p>
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* <p>
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* Timing tests indicate this class is as about as fast as SimpleDateFormat in single thread applications and about 25% faster in multi-thread applications.
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* </p>
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*
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* @since 3.2
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* @see FastDatePrinter
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@ -108,19 +113,18 @@ public class FastDateParser implements DateParser, Serializable {
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private transient List<StrategyAndWidth> patterns;
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/**
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* comparator used to sort regex alternatives. Alternatives should be ordered longer first, and shorter last.
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* ('february' before 'feb'). All entries must be lower-case by locale.
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* comparator used to sort regex alternatives. Alternatives should be ordered longer first, and shorter last. ('february' before 'feb'). All entries must be
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* lower-case by locale.
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*/
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private static final Comparator<String> LONGER_FIRST_LOWERCASE = Comparator.reverseOrder();
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/**
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* Constructs a new FastDateParser.
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*
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* Use {@link FastDateFormat#getInstance(String, TimeZone, Locale)} or another variation of the
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* factory methods of {@link FastDateFormat} to get a cached FastDateParser instance.
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* Use {@link FastDateFormat#getInstance(String, TimeZone, Locale)} or another variation of the factory methods of {@link FastDateFormat} to get a cached
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* FastDateParser instance.
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*
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* @param pattern non-null {@link java.text.SimpleDateFormat} compatible
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* pattern
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* @param pattern non-null {@link java.text.SimpleDateFormat} compatible pattern
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* @param timeZone non-null time zone to use
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* @param locale non-null locale
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*/
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@ -131,16 +135,14 @@ public class FastDateParser implements DateParser, Serializable {
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/**
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* Constructs a new FastDateParser.
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*
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* @param pattern non-null {@link java.text.SimpleDateFormat} compatible
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* pattern
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* @param pattern non-null {@link java.text.SimpleDateFormat} compatible pattern
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* @param timeZone non-null time zone to use
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* @param locale locale, null maps to the default Locale.
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* @param centuryStart The start of the century for 2 digit year parsing
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*
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* @since 3.5
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*/
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protected FastDateParser(final String pattern, final TimeZone timeZone, final Locale locale,
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final Date centuryStart) {
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protected FastDateParser(final String pattern, final TimeZone timeZone, final Locale locale, final Date centuryStart) {
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this.pattern = Objects.requireNonNull(pattern, "pattern");
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this.timeZone = Objects.requireNonNull(timeZone, "timeZone");
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this.locale = LocaleUtils.toLocale(locale);
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@ -165,17 +167,16 @@ public class FastDateParser implements DateParser, Serializable {
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}
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/**
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* Initializes derived fields from defining fields.
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* This is called from constructor and from readObject (de-serialization)
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* Initializes derived fields from defining fields. This is called from constructor and from readObject (de-serialization)
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*
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* @param definingCalendar the {@link java.util.Calendar} instance used to initialize this FastDateParser
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*/
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private void init(final Calendar definingCalendar) {
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patterns = new ArrayList<>();
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final StrategyParser fm = new StrategyParser(definingCalendar);
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final StrategyParser strategyParser = new StrategyParser(definingCalendar);
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for (;;) {
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final StrategyAndWidth field = fm.getNextStrategy();
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final StrategyAndWidth field = strategyParser.getNextStrategy();
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if (field == null) {
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break;
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}
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@ -279,7 +280,9 @@ public class FastDateParser implements DateParser, Serializable {
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}
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// Accessors
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/* (non-Javadoc)
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/*
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* (non-Javadoc)
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*
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* @see org.apache.commons.lang3.time.DateParser#getPattern()
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*/
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@Override
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@ -287,7 +290,9 @@ public class FastDateParser implements DateParser, Serializable {
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return pattern;
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}
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/* (non-Javadoc)
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/*
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* (non-Javadoc)
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*
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* @see org.apache.commons.lang3.time.DateParser#getTimeZone()
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*/
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@Override
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@ -295,7 +300,9 @@ public class FastDateParser implements DateParser, Serializable {
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return timeZone;
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}
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/* (non-Javadoc)
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/*
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* (non-Javadoc)
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*
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* @see org.apache.commons.lang3.time.DateParser#getLocale()
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*/
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@Override
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@ -303,7 +310,6 @@ public class FastDateParser implements DateParser, Serializable {
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return locale;
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}
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// Basics
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/**
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* Compares another object for equality with this object.
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@ -347,14 +353,13 @@ public class FastDateParser implements DateParser, Serializable {
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* @since 3.12.0
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*/
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public String toStringAll() {
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return "FastDateParser [pattern=" + pattern + ", timeZone=" + timeZone + ", locale=" + locale + ", century="
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+ century + ", startYear=" + startYear + ", patterns=" + patterns + "]";
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return "FastDateParser [pattern=" + pattern + ", timeZone=" + timeZone + ", locale=" + locale + ", century=" + century + ", startYear=" + startYear
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+ ", patterns=" + patterns + "]";
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}
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// Serializing
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/**
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* Creates the object after serialization. This implementation reinitializes the
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* transient properties.
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* Creates the object after serialization. This implementation reinitializes the transient properties.
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*
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* @param in ObjectInputStream from which the object is being deserialized.
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* @throws IOException if there is an IO issue.
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@ -367,7 +372,9 @@ public class FastDateParser implements DateParser, Serializable {
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init(definingCalendar);
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}
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/* (non-Javadoc)
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/*
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* (non-Javadoc)
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*
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* @see org.apache.commons.lang3.time.DateParser#parseObject(String)
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*/
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@Override
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@ -375,7 +382,9 @@ public class FastDateParser implements DateParser, Serializable {
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return parse(source);
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}
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/* (non-Javadoc)
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/*
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* (non-Javadoc)
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*
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* @see org.apache.commons.lang3.time.DateParser#parse(String)
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*/
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@Override
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@ -385,15 +394,17 @@ public class FastDateParser implements DateParser, Serializable {
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if (date == null) {
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// Add a note regarding supported date range
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if (locale.equals(JAPANESE_IMPERIAL)) {
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throw new ParseException("(The " + locale + " locale does not support dates before 1868 AD)\n"
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+ "Unparseable date: \"" + source, pp.getErrorIndex());
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throw new ParseException("(The " + locale + " locale does not support dates before 1868 AD)\n" + "Unparseable date: \"" + source,
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pp.getErrorIndex());
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}
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throw new ParseException("Unparseable date: " + source, pp.getErrorIndex());
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}
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return date;
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}
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/* (non-Javadoc)
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/*
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* (non-Javadoc)
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*
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* @see org.apache.commons.lang3.time.DateParser#parseObject(String, java.text.ParsePosition)
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*/
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@Override
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@ -402,14 +413,11 @@ public class FastDateParser implements DateParser, Serializable {
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}
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/**
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* This implementation updates the ParsePosition if the parse succeeds.
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* However, it sets the error index to the position before the failed field unlike
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* the method {@link java.text.SimpleDateFormat#parse(String, ParsePosition)} which sets
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* the error index to after the failed field.
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* This implementation updates the ParsePosition if the parse succeeds. However, it sets the error index to the position before the failed field unlike the
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* method {@link java.text.SimpleDateFormat#parse(String, ParsePosition)} which sets the error index to after the failed field.
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* <p>
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* To determine if the parse has succeeded, the caller must check if the current parse position
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* given by {@link ParsePosition#getIndex()} has been updated. If the input buffer has been fully
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* parsed, then the index will point to just after the end of the input buffer.
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* To determine if the parse has succeeded, the caller must check if the current parse position given by {@link ParsePosition#getIndex()} has been updated.
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* If the input buffer has been fully parsed, then the index will point to just after the end of the input buffer.
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*
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* @see org.apache.commons.lang3.time.DateParser#parse(String, java.text.ParsePosition)
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*/
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@ -423,17 +431,15 @@ public class FastDateParser implements DateParser, Serializable {
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}
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/**
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* Parses a formatted date string according to the format. Updates the Calendar with parsed fields.
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* Upon success, the ParsePosition index is updated to indicate how much of the source text was consumed.
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* Not all source text needs to be consumed. Upon parse failure, ParsePosition error index is updated to
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* Parses a formatted date string according to the format. Updates the Calendar with parsed fields. Upon success, the ParsePosition index is updated to
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* indicate how much of the source text was consumed. Not all source text needs to be consumed. Upon parse failure, ParsePosition error index is updated to
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* the offset of the source text which does not match the supplied format.
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*
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* @param source The text to parse.
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* @param pos On input, the position in the source to start parsing, on output, updated position.
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* @param calendar The calendar into which to set parsed fields.
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* @return true, if source has been parsed (pos parsePosition is updated); otherwise false (and pos errorIndex is updated)
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* @throws IllegalArgumentException when Calendar has been set to be not lenient, and a parsed field is
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* out of range.
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* @throws IllegalArgumentException when Calendar has been set to be not lenient, and a parsed field is out of range.
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*/
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@Override
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public boolean parse(final String source, final ParsePosition pos, final Calendar calendar) {
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@ -480,14 +486,14 @@ public class FastDateParser implements DateParser, Serializable {
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/**
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* Gets the short and long values displayed for a field
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*
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* @param calendar The calendar to obtain the short and long values
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* @param locale The locale of display names
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* @param field The field of interest
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* @param regex The regular expression to build
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* @return The map of string display names to field values
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*/
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private static Map<String, Integer> appendDisplayNames(final Calendar calendar, final Locale locale, final int field,
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final StringBuilder regex) {
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private static Map<String, Integer> appendDisplayNames(final Calendar calendar, final Locale locale, final int field, final StringBuilder regex) {
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Objects.requireNonNull(calendar, "calendar");
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final Map<String, Integer> values = new HashMap<>();
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final Locale actualLocale = LocaleUtils.toLocale(locale);
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@ -505,6 +511,7 @@ public class FastDateParser implements DateParser, Serializable {
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/**
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* Adjusts dates to be within appropriate century
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*
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* @param twoDigitYear The year to adjust
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* @return A value between centuryStart(inclusive) to centuryStart+100(exclusive)
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*/
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@ -527,8 +534,7 @@ public class FastDateParser implements DateParser, Serializable {
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return false;
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}
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abstract boolean parse(FastDateParser parser, Calendar calendar, String source, ParsePosition pos,
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int maxWidth);
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abstract boolean parse(FastDateParser parser, Calendar calendar, String source, ParsePosition pos, int maxWidth);
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}
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/**
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@ -557,8 +563,7 @@ public class FastDateParser implements DateParser, Serializable {
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}
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@Override
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boolean parse(final FastDateParser parser, final Calendar calendar, final String source,
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final ParsePosition pos, final int maxWidth) {
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boolean parse(final FastDateParser parser, final Calendar calendar, final String source, final ParsePosition pos, final int maxWidth) {
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final Matcher matcher = pattern.matcher(source.substring(pos.getIndex()));
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if (!matcher.lookingAt()) {
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pos.setErrorIndex(pos.getIndex());
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@ -581,10 +586,11 @@ public class FastDateParser implements DateParser, Serializable {
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return getClass().getSimpleName() + " [pattern=" + pattern + "]";
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}
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}
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}
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/**
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* Gets a Strategy given a field from a SimpleDateFormat pattern
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*
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* @param f A sub-sequence of the SimpleDateFormat pattern
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* @param width formatting width
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* @param definingCalendar The calendar to obtain the short and long values
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@ -649,6 +655,7 @@ public class FastDateParser implements DateParser, Serializable {
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/**
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* Gets a cache of Strategies for a particular field
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*
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* @param field The Calendar field
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* @return a cache of Locale to Strategy
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*/
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@ -663,13 +670,15 @@ public class FastDateParser implements DateParser, Serializable {
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/**
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* Constructs a Strategy that parses a Text field
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*
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* @param field The Calendar field
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* @param definingCalendar The calendar to obtain the short and long values
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* @return a TextStrategy for the field and Locale
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*/
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private Strategy getLocaleSpecificStrategy(final int field, final Calendar definingCalendar) {
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final ConcurrentMap<Locale, Strategy> cache = getCache(field);
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return cache.computeIfAbsent(locale, k -> field == Calendar.ZONE_OFFSET ? new TimeZoneStrategy(locale) : new CaseInsensitiveTextStrategy(field, definingCalendar, locale));
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return cache.computeIfAbsent(locale,
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k -> field == Calendar.ZONE_OFFSET ? new TimeZoneStrategy(locale) : new CaseInsensitiveTextStrategy(field, definingCalendar, locale));
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}
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/**
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@ -697,8 +706,7 @@ public class FastDateParser implements DateParser, Serializable {
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}
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@Override
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boolean parse(final FastDateParser parser, final Calendar calendar, final String source,
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final ParsePosition pos, final int maxWidth) {
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boolean parse(final FastDateParser parser, final Calendar calendar, final String source, final ParsePosition pos, final int maxWidth) {
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for (int idx = 0; idx < formatField.length(); ++idx) {
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final int sIdx = idx + pos.getIndex();
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if (sIdx == source.length()) {
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@ -763,7 +771,7 @@ public class FastDateParser implements DateParser, Serializable {
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// match missing the optional trailing period
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iVal = lKeyValues.get(lowerCase + '.');
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}
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//LANG-1669: Mimic fix done in OpenJDK 17 to resolve issue with parsing newly supported day periods added in OpenJDK 16
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// LANG-1669: Mimic fix done in OpenJDK 17 to resolve issue with parsing newly supported day periods added in OpenJDK 16
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if (Calendar.AM_PM != this.field || iVal <= 1) {
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calendar.set(field, iVal.intValue());
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}
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@ -776,12 +784,10 @@ public class FastDateParser implements DateParser, Serializable {
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*/
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@Override
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public String toString() {
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return "CaseInsensitiveTextStrategy [field=" + field + ", locale=" + locale + ", lKeyValues=" + lKeyValues
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+ ", pattern=" + pattern + "]";
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return "CaseInsensitiveTextStrategy [field=" + field + ", locale=" + locale + ", lKeyValues=" + lKeyValues + ", pattern=" + pattern + "]";
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}
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}
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/**
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* A strategy that handles a number field in the parsing pattern
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*/
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@ -807,8 +813,7 @@ public class FastDateParser implements DateParser, Serializable {
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}
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@Override
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boolean parse(final FastDateParser parser, final Calendar calendar, final String source,
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final ParsePosition pos, final int maxWidth) {
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boolean parse(final FastDateParser parser, final Calendar calendar, final String source, final ParsePosition pos, final int maxWidth) {
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int idx = pos.getIndex();
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int last = source.length();
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@ -1000,6 +1005,7 @@ public class FastDateParser implements DateParser, Serializable {
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/**
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* Constructs a Strategy that parses a TimeZone
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*
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* @param pattern The Pattern
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*/
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ISO8601TimeZoneStrategy(final String pattern) {
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@ -1022,11 +1028,11 @@ public class FastDateParser implements DateParser, Serializable {
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* Factory method for ISO8601TimeZoneStrategies.
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*
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* @param tokenLen a token indicating the length of the TimeZone String to be formatted.
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* @return a ISO8601TimeZoneStrategy that can format TimeZone String of length {@code tokenLen}. If no such
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* strategy exists, an IllegalArgumentException will be thrown.
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* @return a ISO8601TimeZoneStrategy that can format TimeZone String of length {@code tokenLen}. If no such strategy exists, an IllegalArgumentException
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* will be thrown.
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*/
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static Strategy getStrategy(final int tokenLen) {
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switch(tokenLen) {
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switch (tokenLen) {
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case 1:
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return ISO_8601_1_STRATEGY;
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case 2:
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@ -1042,7 +1048,7 @@ public class FastDateParser implements DateParser, Serializable {
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private static final Strategy NUMBER_MONTH_STRATEGY = new NumberStrategy(Calendar.MONTH) {
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@Override
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int modify(final FastDateParser parser, final int iValue) {
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return iValue-1;
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return iValue - 1;
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}
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};
|
||||
|
||||
|
|
|
|||
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Reference in New Issue