Package org.geotools.feature.type
Class DateUtil
- Object
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- DateUtil
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public abstract class DateUtil extends Object
Utility class supplying static methods. Date serialization is based on the algorithms published by Peter Baum (http://www.capecod.net/~pbaum). All date handling is done according to the W3C Schema specification, which uses a proleptic Gregorian calendar with no year 0. Note that this differs from the Java date handling, which uses a discontinuous Gregorian calendar.- Author:
- Dennis M. Sosnoski
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Constructor Summary
Constructors Constructor Description DateUtil()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static List
arrayListFactory()
Factory method to create ajava.util.ArrayList
as the implementation of ajava.util.List
.static byte[]
deserializeBase64(String text)
Parse base64 data from text.static char
deserializeCharString(String text)
Deserialize char value from text as character value.static Date
deserializeDate(String text)
Deserialize date from text.static Date
deserializeDateTime(String text)
Deserialize date from general dateTime text.static Date
deserializeSqlDate(String text)
Deserialize SQL date from text.static Time
deserializeSqlTime(String text)
Deserialize time from text.static Timestamp
deserializeTimestamp(String text)
Deserialize timestamp from general dateTime text.static void
encodeChunk(int base, byte[] byts, StringBuffer buff)
Encode a chunk of data to base64 encoding.static int
enumValue(String target, String[] enums, int[] vals)
Find text value in enumeration.protected static void
formatTwoDigits(int value, StringBuffer buff)
Format a positive number as two digits.protected static void
formatYear(long value, StringBuffer buff)
Format time in milliseconds to year number.protected static long
formatYearMonth(long value, StringBuffer buff)
Format time in milliseconds to year number and month number.protected static int
formatYearMonthDay(long value, StringBuffer buff)
Format time in milliseconds to year number, month number, and day number.protected static void
formatYearNumber(long year, StringBuffer buff)
Format year number consistent with W3C XML Schema definitions, using a minimum of four digits padded with zeros if necessary.static boolean
isEqual(Object a, Object b)
General object comparison method.static byte[]
parseBase64(String text)
Parse base64 data from text.static boolean
parseBoolean(String text)
Parse boolean value from text.static byte
parseByte(String text)
Parse byte value from text.static char
parseChar(String text)
Parse char value from text as unsigned 16-bit integer.static char
parseCharString(String text)
Parse char value from text as character value.static long
parseDate(String text)
Convert date text to Java date.static long
parseDateTime(String text)
Parse general dateTime value from text.static double
parseDouble(String text)
Parse double value from text.static float
parseFloat(String text)
Parse float value from text.static int
parseInt(String text)
Parse integer value from text.static long
parseLong(String text)
Parse long value from text.static short
parseShort(String text)
Parse short value from text.static long
parseTime(String text, int start, int length)
Parse general time value from text.static long
parseYear(String text)
Convert gYear text to Java date.static long
parseYearMonth(String text)
Convert gYearMonth text to Java date.static String
serializeBase64(byte[] byts)
Serialize byte array to base64 text.static String
serializeBoolean(boolean value)
Serialize boolean value to text.static String
serializeByte(byte value)
Serialize byte value to text.static String
serializeChar(char value)
Serialize char value to text as unsigned 16-bit integer.static String
serializeCharString(char value)
Serialize char value to text as string of length one.static String
serializeDate(long time)
Serialize time to general date text.static String
serializeDate(Date date)
Serialize date to general date text.static String
serializeDateTime(long time)
Serialize time to general dateTime text.static String
serializeDateTime(long time, boolean zone)
Serialize time to general dateTime text.static String
serializeDateTime(Date date)
Serialize date to general dateTime text.static String
serializeDouble(double value)
Serialize double value to text.static String
serializeFloat(float value)
Serialize float value to text.static String
serializeInt(int value)
Serialize int value to text.static String
serializeLong(long value)
Serialize long value to text.static String
serializeShort(short value)
Serialize short value to text.static String
serializeSqlDate(Date date)
Serialize SQL date to general date text.static String
serializeSqlTime(Time time)
Serialize time to standard text.static void
serializeTime(int time, StringBuffer buff)
Serialize time to general time text in buffer.static String
serializeTimestamp(Timestamp stamp)
Serialize timestamp to general dateTime text.static String
serializeYear(long time)
Serialize time to general gYear text.static String
serializeYear(Date date)
Serialize date to general gYear text.static String
serializeYearMonth(long time)
Serialize time to general gYearMonth text.static String
serializeYearMonth(Date date)
Serialize date to general gYearMonth text.
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Method Detail
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parseInt
public static int parseInt(String text) throws IllegalArgumentException
Parse integer value from text. Integer values are parsed with optional leading sign flag, followed by any number of digits.- Parameters:
text
- text to be parsed- Returns:
- converted integer value
- Throws:
IllegalArgumentException
- on parse error
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serializeInt
public static String serializeInt(int value)
Serialize int value to text.- Parameters:
value
- int value to be serialized- Returns:
- text representation of value
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parseLong
public static long parseLong(String text) throws IllegalArgumentException
Parse long value from text. Long values are parsed with optional leading sign flag, followed by any number of digits.- Parameters:
text
- text to be parsed- Returns:
- converted long value
- Throws:
IllegalArgumentException
- on parse error
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serializeLong
public static String serializeLong(long value)
Serialize long value to text.- Parameters:
value
- long value to be serialized- Returns:
- text representation of value
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parseShort
public static short parseShort(String text) throws IllegalArgumentException
Parse short value from text. Short values are parsed with optional leading sign flag, followed by any number of digits.- Parameters:
text
- text to be parsed- Returns:
- converted short value
- Throws:
IllegalArgumentException
- on parse error
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serializeShort
public static String serializeShort(short value)
Serialize short value to text.- Parameters:
value
- short value to be serialized- Returns:
- text representation of value
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parseByte
public static byte parseByte(String text) throws IllegalArgumentException
Parse byte value from text. Byte values are parsed with optional leading sign flag, followed by any number of digits.- Parameters:
text
- text to be parsed- Returns:
- converted byte value
- Throws:
IllegalArgumentException
- on parse error
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serializeByte
public static String serializeByte(byte value)
Serialize byte value to text.- Parameters:
value
- byte value to be serialized- Returns:
- text representation of value
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parseBoolean
public static boolean parseBoolean(String text) throws IllegalArgumentException
Parse boolean value from text. Boolean values are parsed as either text "true" and "false", or "1" and "0" numeric equivalents.- Parameters:
text
- text to be parsed- Returns:
- converted boolean value
- Throws:
IllegalArgumentException
- on parse error
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serializeBoolean
public static String serializeBoolean(boolean value)
Serialize boolean value to text. This serializes the value using the text representation as "true" or "false".- Parameters:
value
- boolean value to be serialized- Returns:
- text representation of value
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parseChar
public static char parseChar(String text) throws IllegalArgumentException
Parse char value from text as unsigned 16-bit integer. Char values are parsed with optional leading sign flag, followed by any number of digits.- Parameters:
text
- text to be parsed- Returns:
- converted char value
- Throws:
IllegalArgumentException
- on parse error
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serializeChar
public static String serializeChar(char value)
Serialize char value to text as unsigned 16-bit integer.- Parameters:
value
- char value to be serialized- Returns:
- text representation of value
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parseCharString
public static char parseCharString(String text) throws IllegalArgumentException
Parse char value from text as character value. This requires that the string must be of length one.- Parameters:
text
- text to be parsed- Returns:
- converted char value
- Throws:
IllegalArgumentException
- on parse error
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deserializeCharString
public static char deserializeCharString(String text) throws IllegalArgumentException
Deserialize char value from text as character value. This requires that the string must be null or of length one.- Parameters:
text
- text to be parsed (may benull
)- Returns:
- converted char value
- Throws:
IllegalArgumentException
- on parse error
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serializeCharString
public static String serializeCharString(char value)
Serialize char value to text as string of length one.- Parameters:
value
- char value to be serialized- Returns:
- text representation of value
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parseFloat
public static float parseFloat(String text) throws IllegalArgumentException
Parse float value from text. This uses the W3C XML Schema format for floats, with the exception that it will accept "+NaN" and "-NaN" as valid formats. This is not in strict compliance with the specification, but is included for interoperability with other Java XML processing.- Parameters:
text
- text to be parsed- Returns:
- converted float value
- Throws:
IllegalArgumentException
- on parse error
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serializeFloat
public static String serializeFloat(float value)
Serialize float value to text.- Parameters:
value
- float value to be serialized- Returns:
- text representation of value
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parseDouble
public static double parseDouble(String text) throws IllegalArgumentException
Parse double value from text. This uses the W3C XML Schema format for doubles, with the exception that it will accept "+NaN" and "-NaN" as valid formats. This is not in strict compliance with the specification, but is included for interoperability with other Java XML processing.- Parameters:
text
- text to be parsed- Returns:
- converted double value
- Throws:
IllegalArgumentException
- on parse error
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serializeDouble
public static String serializeDouble(double value)
Serialize double value to text.- Parameters:
value
- double value to be serialized- Returns:
- text representation of value
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parseYear
public static long parseYear(String text) throws IllegalArgumentException
Convert gYear text to Java date. Date values are expected to be in W3C XML Schema standard format as CCYY, with optional leading sign.- Parameters:
text
- text to be parsed- Returns:
- start of year date as millisecond value from 1 C.E.
- Throws:
IllegalArgumentException
- on parse error
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parseYearMonth
public static long parseYearMonth(String text) throws IllegalArgumentException
Convert gYearMonth text to Java date. Date values are expected to be in W3C XML Schema standard format as CCYY-MM, with optional leading sign.- Parameters:
text
- text to be parsed- Returns:
- start of month in year date as millisecond value
- Throws:
IllegalArgumentException
- on parse error
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parseDate
public static long parseDate(String text) throws IllegalArgumentException
Convert date text to Java date. Date values are expected to be in W3C XML Schema standard format as CCYY-MM-DD, with optional leading sign and trailing time zone (though the time zone is ignored in this case).- Parameters:
text
- text to be parsed- Returns:
- start of day in month and year date as millisecond value
- Throws:
IllegalArgumentException
- on parse error
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deserializeDate
public static Date deserializeDate(String text) throws IllegalArgumentException
Deserialize date from text. Date values are expected to match W3C XML Schema standard format as CCYY-MM-DD, with optional leading minus sign if necessary. This method follows standard JiBX deserializer usage requirements by accepting anull
input.- Parameters:
text
- text to be parsed (may benull
)- Returns:
- converted date, or
null
if passednull
input - Throws:
IllegalArgumentException
- on parse error
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deserializeSqlDate
public static Date deserializeSqlDate(String text) throws IllegalArgumentException
Deserialize SQL date from text. Date values are expected to match W3C XML Schema standard format as CCYY-MM-DD, with optional leading minus sign if necessary. This method follows standard JiBX deserializer usage requirements by accepting anull
input.- Parameters:
text
- text to be parsed (may benull
)- Returns:
- converted date, or
null
if passednull
input - Throws:
IllegalArgumentException
- on parse error
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parseTime
public static long parseTime(String text, int start, int length) throws IllegalArgumentException
Parse general time value from text. Time values are expected to be in W3C XML Schema standard format as hh:mm:ss.fff, with optional leading sign and trailing time zone.- Parameters:
text
- text to be parsedstart
- offset of first character of time valuelength
- number of characters in time value- Returns:
- converted time as millisecond value
- Throws:
IllegalArgumentException
- on parse error
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parseDateTime
public static long parseDateTime(String text) throws IllegalArgumentException
Parse general dateTime value from text. Date values are expected to be in W3C XML Schema standard format as CCYY-MM-DDThh:mm:ss.fff, with optional leading sign and trailing time zone.- Parameters:
text
- text to be parsed- Returns:
- converted date as millisecond value
- Throws:
IllegalArgumentException
- on parse error
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deserializeDateTime
public static Date deserializeDateTime(String text) throws IllegalArgumentException
Deserialize date from general dateTime text. Date values are expected to match W3C XML Schema standard format as CCYY-MM-DDThh:mm:ss, with optional leading minus sign and trailing seconds decimal, as necessary. This method follows standard JiBX deserializer usage requirements by accepting anull
input.- Parameters:
text
- text to be parsed (may benull
)- Returns:
- converted date, or
null
if passednull
input - Throws:
IllegalArgumentException
- on parse error
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deserializeTimestamp
public static Timestamp deserializeTimestamp(String text) throws IllegalArgumentException
Deserialize timestamp from general dateTime text. Timestamp values are represented in the same way as regular dates, but allow more precision in the fractional second value (down to nanoseconds). This method follows standard JiBX deserializer usage requirements by accepting anull
input.- Parameters:
text
- text to be parsed (may benull
)- Returns:
- converted timestamp, or
null
if passednull
input - Throws:
IllegalArgumentException
- on parse error
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deserializeSqlTime
public static Time deserializeSqlTime(String text) throws IllegalArgumentException
Deserialize time from text. Time values obey the rules of the time portion of a dataTime value. This method follows standard JiBX deserializer usage requirements by accepting anull
input.- Parameters:
text
- text to be parsed (may benull
)- Returns:
- converted time, or
null
if passednull
input - Throws:
IllegalArgumentException
- on parse error
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formatYearNumber
protected static void formatYearNumber(long year, StringBuffer buff)
Format year number consistent with W3C XML Schema definitions, using a minimum of four digits padded with zeros if necessary. A leading minus sign is included for years prior to 1 C.E.- Parameters:
year
- number to be formattedbuff
- text formatting buffer
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formatTwoDigits
protected static void formatTwoDigits(int value, StringBuffer buff)
Format a positive number as two digits. This uses an optional leading zero digit for values less than ten.- Parameters:
value
- number to be formatted (0
to99
)buff
- text formatting buffer
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formatYear
protected static void formatYear(long value, StringBuffer buff)
Format time in milliseconds to year number. The resulting year number format is consistent with W3C XML Schema definitions, using a minimum of four digits padded with zeros if necessary. A leading minus sign is included for years prior to 1 C.E.- Parameters:
value
- time in milliseconds to be converted (from 1 C.E.)buff
- text formatting buffer
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formatYearMonth
protected static long formatYearMonth(long value, StringBuffer buff)
Format time in milliseconds to year number and month number. The resulting year number format is consistent with W3C XML Schema definitions, using a minimum of four digits for the year and exactly two digits for the month.- Parameters:
value
- time in milliseconds to be converted (from 1 C.E.)buff
- text formatting buffer- Returns:
- number of milliseconds into month
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formatYearMonthDay
protected static int formatYearMonthDay(long value, StringBuffer buff)
Format time in milliseconds to year number, month number, and day number. The resulting year number format is consistent with W3C XML Schema definitions, using a minimum of four digits for the year and exactly two digits each for the month and day.- Parameters:
value
- time in milliseconds to be converted (from 1 C.E.)buff
- text formatting buffer- Returns:
- number of milliseconds into day
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serializeYear
public static String serializeYear(long time) throws IllegalArgumentException
Serialize time to general gYear text. Date values are formatted in W3C XML Schema standard format as CCYY, with optional leading sign included if necessary.- Parameters:
time
- time to be converted, as milliseconds from January 1, 1970- Returns:
- converted gYear text
- Throws:
IllegalArgumentException
- on conversion error
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serializeYear
public static String serializeYear(Date date) throws IllegalArgumentException
Serialize date to general gYear text. Date values are formatted in W3C XML Schema standard format as CCYY, with optional leading sign included if necessary.- Parameters:
date
- date to be converted- Returns:
- converted gYear text
- Throws:
IllegalArgumentException
- on conversion error
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serializeYearMonth
public static String serializeYearMonth(long time) throws IllegalArgumentException
Serialize time to general gYearMonth text. Date values are formatted in W3C XML Schema standard format as CCYY-MM, with optional leading sign included if necessary.- Parameters:
time
- time to be converted, as milliseconds from January 1, 1970- Returns:
- converted gYearMonth text
- Throws:
IllegalArgumentException
- on conversion error
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serializeYearMonth
public static String serializeYearMonth(Date date) throws IllegalArgumentException
Serialize date to general gYearMonth text. Date values are formatted in W3C XML Schema standard format as CCYY-MM, with optional leading sign included if necessary.- Parameters:
date
- date to be converted- Returns:
- converted gYearMonth text
- Throws:
IllegalArgumentException
- on conversion error
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serializeDate
public static String serializeDate(long time) throws IllegalArgumentException
Serialize time to general date text. Date values are formatted in W3C XML Schema standard format as CCYY-MM-DD, with optional leading sign included if necessary.- Parameters:
time
- time to be converted, as milliseconds from January 1, 1970- Returns:
- converted date text
- Throws:
IllegalArgumentException
- on conversion error
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serializeDate
public static String serializeDate(Date date) throws IllegalArgumentException
Serialize date to general date text. Date values are formatted in W3C XML Schema standard format as CCYY-MM-DD, with optional leading sign included if necessary.- Parameters:
date
- date to be converted- Returns:
- converted date text
- Throws:
IllegalArgumentException
- on conversion error
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serializeSqlDate
public static String serializeSqlDate(Date date) throws IllegalArgumentException
Serialize SQL date to general date text. Date values are formatted in W3C XML Schema standard format as CCYY-MM-DD, with optional leading sign included if necessary.- Parameters:
date
- date to be converted- Returns:
- converted date text
- Throws:
IllegalArgumentException
- on conversion error
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serializeTime
public static void serializeTime(int time, StringBuffer buff) throws IllegalArgumentException
Serialize time to general time text in buffer. Time values are formatted in W3C XML Schema standard format as hh:mm:ss, with optional trailing seconds decimal, as necessary. This form uses a supplied buffer to support flexible use, including with dateTime combination values.- Parameters:
time
- time to be converted, as milliseconds in daybuff
- buffer for appending time text- Throws:
IllegalArgumentException
- on conversion error
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serializeDateTime
public static String serializeDateTime(long time, boolean zone) throws IllegalArgumentException
Serialize time to general dateTime text. Date values are formatted in W3C XML Schema standard format as CCYY-MM-DDThh:mm:ss, with optional leading sign and trailing seconds decimal, as necessary.- Parameters:
time
- time to be converted, as milliseconds from January 1, 1970zone
- flag for trailing 'Z' to be appended to indicate UTC- Returns:
- converted dateTime text
- Throws:
IllegalArgumentException
- on conversion error
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serializeDateTime
public static String serializeDateTime(long time) throws IllegalArgumentException
Serialize time to general dateTime text. This method is provided for backward compatibility. It generates the dateTime text without the trailing 'Z' to indicate UTC.- Parameters:
time
- time to be converted, as milliseconds from January 1, 1970- Returns:
- converted dateTime text
- Throws:
IllegalArgumentException
- on conversion error
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serializeDateTime
public static String serializeDateTime(Date date) throws IllegalArgumentException
Serialize date to general dateTime text. Date values are formatted in W3C XML Schema standard format as CCYY-MM-DDThh:mm:ss, with optional leading sign and trailing seconds decimal, as necessary.- Parameters:
date
- date to be converted- Returns:
- converted dateTime text
- Throws:
IllegalArgumentException
- on conversion error
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serializeTimestamp
public static String serializeTimestamp(Timestamp stamp) throws IllegalArgumentException
Serialize timestamp to general dateTime text. Timestamp values are represented in the same way as regular dates, but allow more precision in the fractional second value (down to nanoseconds).- Parameters:
stamp
- timestamp to be converted- Returns:
- converted dateTime text
- Throws:
IllegalArgumentException
- on conversion error
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serializeSqlTime
public static String serializeSqlTime(Time time) throws IllegalArgumentException
Serialize time to standard text. Time values are formatted in W3C XML Schema standard format as hh:mm:ss, with optional trailing seconds decimal, as necessary. The standard conversion does not append a time zone indication.- Parameters:
time
- time to be converted- Returns:
- converted time text
- Throws:
IllegalArgumentException
- on conversion error
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isEqual
public static boolean isEqual(Object a, Object b)
General object comparison method. Don't know why Sun hasn't seen fit to include this somewhere, but at least it's easy to write (over and over again).- Parameters:
a
- first object to be comparedb
- second object to be compared- Returns:
true
if both objects arenull
, or ifa.equals(b)
;false
otherwise
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enumValue
public static int enumValue(String target, String[] enums, int[] vals) throws IllegalArgumentException
Find text value in enumeration. This first does a binary search through an array of allowed text matches. If a separate array of corresponding values is supplied, the value at the matched position is returned; otherwise the match index is returned directly.- Parameters:
target
- text to be found in enumerationenums
- ordered array of texts included in enumerationvals
- array of values to be returned for corresponding text match positions (position returned directly if this isnull
)- Returns:
- enumeration value for target text
- Throws:
IllegalArgumentException
- if target text not found in enumeration
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parseBase64
public static byte[] parseBase64(String text) throws IllegalArgumentException
Parse base64 data from text. This converts the base64 data into a byte array of the appopriate length. In keeping with the recommendations,- Parameters:
text
- text to be parsed (may include extra characters)- Returns:
- byte array of data
- Throws:
IllegalArgumentException
- if invalid character in base64 representation
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deserializeBase64
public static byte[] deserializeBase64(String text) throws IllegalArgumentException
Parse base64 data from text. This converts the base64 data into a byte array of the appopriate length. In keeping with the recommendations,- Parameters:
text
- text to be parsed (may be null, or include extra characters)- Returns:
- byte array of data
- Throws:
IllegalArgumentException
- if invalid character in base64 representation
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encodeChunk
public static void encodeChunk(int base, byte[] byts, StringBuffer buff)
Encode a chunk of data to base64 encoding. Converts the next three bytes of data into four characters of text representation, using padding at the end of less than three bytes of data remain.- Parameters:
base
- starting offset within byte arraybyts
- byte data arraybuff
- buffer for encoded text
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serializeBase64
public static String serializeBase64(byte[] byts)
Serialize byte array to base64 text. In keeping with the specification, this adds a line break every 76 characters in the encoded representation.- Parameters:
byts
- byte data array- Returns:
- base64 encoded text
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arrayListFactory
public static List arrayListFactory()
Factory method to create ajava.util.ArrayList
as the implementation of ajava.util.List
.- Returns:
- new
java.util.ArrayList
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