Class DateTimeConverter

java.lang.Object
org.apache.commons.beanutils.converters.AbstractConverter
org.apache.commons.beanutils.converters.DateTimeConverter
All Implemented Interfaces:
Converter
Direct Known Subclasses:
CalendarConverter, DateConverter, SqlDateConverter, SqlTimeConverter, SqlTimestampConverter

public abstract class DateTimeConverter extends AbstractConverter
Converter implementaion that handles conversion to and from date/time objects.

This implementation handles conversion for the following date/time types.

  • java.util.Date
  • java.util.Calendar
  • java.sql.Date
  • java.sql.Time
  • java.sql.Timestamp

String Conversions (to and from)

This class provides a number of ways in which date/time conversions to/from Strings can be achieved:
  • Using the SHORT date format for the default Locale, configure using:
    • setUseLocaleFormat(true)
  • Using the SHORT date format for a specified Locale, configure using:
    • setLocale(Locale)
  • Using the specified date pattern(s) for the default Locale, configure using:
    • Either setPattern(String) or setPatterns(String[])
  • Using the specified date pattern(s) for a specified Locale, configure using:
    • setPattern(String) or setPatterns(String[]) and...
    • setLocale(Locale)
  • If none of the above are configured the toDate(String) method is used to convert from String to Date and the Dates's toString() method used to convert from Date to String.

The Time Zone to use with the date format can be specified using the setTimeZone() method.

Since:
1.8.0
Version:
$Id$
  • Field Details

    • patterns

      private String[] patterns
    • displayPatterns

      private String displayPatterns
    • locale

      private Locale locale
    • timeZone

      private TimeZone timeZone
    • useLocaleFormat

      private boolean useLocaleFormat
  • Constructor Details

    • DateTimeConverter

      public DateTimeConverter()
      Construct a Date/Time Converter that throws a ConversionException if an error occurs.
    • DateTimeConverter

      public DateTimeConverter(Object defaultValue)
      Construct a Date/Time Converter that returns a default value if an error occurs.
      Parameters:
      defaultValue - The default value to be returned if the value to be converted is missing or an error occurs converting the value.
  • Method Details

    • setUseLocaleFormat

      public void setUseLocaleFormat(boolean useLocaleFormat)
      Indicate whether conversion should use a format/pattern or not.
      Parameters:
      useLocaleFormat - true if the format for the locale should be used, otherwise false
    • getTimeZone

      public TimeZone getTimeZone()
      Return the Time Zone to use when converting dates (or null if none specified.
      Returns:
      The Time Zone.
    • setTimeZone

      public void setTimeZone(TimeZone timeZone)
      Set the Time Zone to use when converting dates.
      Parameters:
      timeZone - The Time Zone.
    • getLocale

      public Locale getLocale()
      Return the Locale for the Converter (or null if none specified).
      Returns:
      The locale to use for conversion
    • setLocale

      public void setLocale(Locale locale)
      Set the Locale for the Converter.
      Parameters:
      locale - The Locale.
    • setPattern

      public void setPattern(String pattern)
      Set a date format pattern to use to convert dates to/from a java.lang.String.
      Parameters:
      pattern - The format pattern.
      See Also:
    • getPatterns

      public String[] getPatterns()
      Return the date format patterns used to convert dates to/from a java.lang.String (or null if none specified).
      Returns:
      Array of format patterns.
      See Also:
    • setPatterns

      public void setPatterns(String[] patterns)
      Set the date format patterns to use to convert dates to/from a java.lang.String.
      Parameters:
      patterns - Array of format patterns.
      See Also:
    • convertToString

      protected String convertToString(Object value) throws Throwable
      Convert an input Date/Calendar object into a String.

      N.B.If the converter has been configured to with one or more patterns (using setPatterns()), then the first pattern will be used to format the date into a String. Otherwise the default DateFormat for the default locale (and style if configured) will be used.

      Overrides:
      convertToString in class AbstractConverter
      Parameters:
      value - The input value to be converted
      Returns:
      the converted String value.
      Throws:
      Throwable - if an error occurs converting to a String
    • convertToType

      protected <T> T convertToType(Class<T> targetType, Object value) throws Exception
      Convert the input object into a Date object of the specified type.

      This method handles conversions between the following types:

      • java.util.Date
      • java.util.Calendar
      • java.sql.Date
      • java.sql.Time
      • java.sql.Timestamp
      It also handles conversion from a String to any of the above types.

      For String conversion, if the converter has been configured with one or more patterns (using setPatterns()), then the conversion is attempted with each of the specified patterns. Otherwise the default DateFormat for the default locale (and style if configured) will be used.

      Specified by:
      convertToType in class AbstractConverter
      Type Parameters:
      T - The desired target type of the conversion.
      Parameters:
      targetType - Data type to which this value should be converted.
      value - The input value to be converted.
      Returns:
      The converted value.
      Throws:
      Exception - if conversion cannot be performed successfully
    • toDate

      private <T> T toDate(Class<T> type, long value)
      Convert a long value to the specified Date type for this Converter.

      This method handles conversion to the following types:

      • java.util.Date
      • java.util.Calendar
      • java.sql.Date
      • java.sql.Time
      • java.sql.Timestamp
      Type Parameters:
      T - The target type
      Parameters:
      type - The Date type to convert to
      value - The long value to convert.
      Returns:
      The converted date value.
    • toDate

      private <T> T toDate(Class<T> type, String value)
      Default String to Date conversion.

      This method handles conversion from a String to the following types:

      • java.sql.Date
      • java.sql.Time
      • java.sql.Timestamp

      N.B. No default String conversion mechanism is provided for java.util.Date and java.util.Calendar type.

      Type Parameters:
      T - The target type
      Parameters:
      type - The date type to convert to
      value - The String value to convert.
      Returns:
      The converted Number value.
    • getFormat

      protected DateFormat getFormat(Locale locale, TimeZone timeZone)
      Return a DateFormat for the Locale.
      Parameters:
      locale - The Locale to create the Format with (may be null)
      timeZone - The Time Zone create the Format with (may be null)
      Returns:
      A Date Format.
    • getFormat

      private DateFormat getFormat(String pattern)
      Create a date format for the specified pattern.
      Parameters:
      pattern - The date pattern
      Returns:
      The DateFormat
    • parse

      private Calendar parse(Class<?> sourceType, Class<?> targetType, String value) throws Exception
      Parse a String date value using the set of patterns.
      Parameters:
      sourceType - The type of the value being converted
      targetType - The type to convert the value to.
      value - The String date value.
      Returns:
      The converted Date object.
      Throws:
      Exception - if an error occurs parsing the date.
    • parse

      private Calendar parse(Class<?> sourceType, Class<?> targetType, String value, DateFormat format)
      Parse a String into a Calendar object using the specified DateFormat.
      Parameters:
      sourceType - The type of the value being converted
      targetType - The type to convert the value to
      value - The String date value.
      format - The DateFormat to parse the String value.
      Returns:
      The converted Calendar object.
      Throws:
      ConversionException - if the String cannot be converted.
    • toString

      public String toString()
      Provide a String representation of this date/time converter.
      Overrides:
      toString in class AbstractConverter
      Returns:
      A String representation of this date/time converter
    • logFormat

      private void logFormat(String action, DateFormat format)
      Log the DateFormat creation.
      Parameters:
      action - The action the format is being used for
      format - The Date format