Package org.joda.time

Interface ReadablePartial

  • All Superinterfaces:
    java.lang.Comparable<ReadablePartial>
    All Known Implementing Classes:
    AbstractPartial, BaseLocal, BasePartial, LocalDate, LocalDateTime, LocalTime, MonthDay, Partial, TimeOfDay, YearMonth, YearMonthDay

    public interface ReadablePartial
    extends java.lang.Comparable<ReadablePartial>
    Defines a partial time that does not support every datetime field, and is thus a local time.

    A ReadablePartial supports a subset of those fields on the chronology. It cannot be compared to a ReadableInstant, as it does not fully specify an instant in time. The time it does specify is a local time, and does not include a time zone.

    A ReadablePartial can be converted to a ReadableInstant using the toDateTime method. This works by providing a full base instant that can be used to 'fill in the gaps' and specify a time zone.

    ReadablePartial is Comparable from v2.0. The comparison is based on the fields, compared in order, from largest to smallest. The first field that is non-equal is used to determine the result.

    Since:
    1.0
    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      boolean equals​(java.lang.Object partial)
      Compares this partial with the specified object for equality based on the supported fields, chronology and values.
      int get​(DateTimeFieldType field)
      Gets the value of one of the fields.
      Chronology getChronology()
      Gets the chronology of the partial which is never null.
      DateTimeField getField​(int index)
      Gets the field at the specified index.
      DateTimeFieldType getFieldType​(int index)
      Gets the field type at the specified index.
      int getValue​(int index)
      Gets the value at the specified index.
      int hashCode()
      Gets a hash code for the partial that is compatible with the equals method.
      boolean isSupported​(DateTimeFieldType field)
      Checks whether the field type specified is supported by this partial.
      int size()
      Gets the number of fields that this partial supports.
      DateTime toDateTime​(ReadableInstant baseInstant)
      Converts this partial to a full datetime by resolving it against another datetime.
      java.lang.String toString()
      Get the value as a String in a recognisable ISO8601 format, only displaying supported fields.
      • Methods inherited from interface java.lang.Comparable

        compareTo
    • Method Detail

      • size

        int size()
        Gets the number of fields that this partial supports.
        Returns:
        the number of fields supported
      • getFieldType

        DateTimeFieldType getFieldType​(int index)
        Gets the field type at the specified index.
        Parameters:
        index - the index to retrieve
        Returns:
        the field at the specified index
        Throws:
        java.lang.IndexOutOfBoundsException - if the index is invalid
      • getField

        DateTimeField getField​(int index)
        Gets the field at the specified index.
        Parameters:
        index - the index to retrieve
        Returns:
        the field at the specified index
        Throws:
        java.lang.IndexOutOfBoundsException - if the index is invalid
      • getValue

        int getValue​(int index)
        Gets the value at the specified index.
        Parameters:
        index - the index to retrieve
        Returns:
        the value of the field at the specified index
        Throws:
        java.lang.IndexOutOfBoundsException - if the index is invalid
      • getChronology

        Chronology getChronology()
        Gets the chronology of the partial which is never null.

        The Chronology is the calculation engine behind the partial and provides conversion and validation of the fields in a particular calendar system.

        Returns:
        the chronology, never null
      • get

        int get​(DateTimeFieldType field)
        Gets the value of one of the fields.

        The field type specified must be one of those that is supported by the partial.

        Parameters:
        field - a DateTimeFieldType instance that is supported by this partial
        Returns:
        the value of that field
        Throws:
        java.lang.IllegalArgumentException - if the field is null or not supported
      • isSupported

        boolean isSupported​(DateTimeFieldType field)
        Checks whether the field type specified is supported by this partial.
        Parameters:
        field - the field to check, may be null which returns false
        Returns:
        true if the field is supported
      • toDateTime

        DateTime toDateTime​(ReadableInstant baseInstant)
        Converts this partial to a full datetime by resolving it against another datetime.

        This method takes the specified datetime and sets the fields from this instant on top. The chronology from the base instant is used.

        For example, if this partial represents a time, then the result of this method will be the datetime from the specified base instant plus the time from this partial.

        Parameters:
        baseInstant - the instant that provides the missing fields, null means now
        Returns:
        the combined datetime
      • equals

        boolean equals​(java.lang.Object partial)
        Compares this partial with the specified object for equality based on the supported fields, chronology and values.

        Two instances of ReadablePartial are equal if they have the same chronology, same field types (in same order) and same values.

        Overrides:
        equals in class java.lang.Object
        Parameters:
        partial - the object to compare to
        Returns:
        true if equal
      • hashCode

        int hashCode()
        Gets a hash code for the partial that is compatible with the equals method.

        The formula used must be:

          int total = 157;
          for (int i = 0; i < fields.length; i++) {
              total = 23 * total + values[i];
              total = 23 * total + fieldTypes[i].hashCode();
          }
          total += chronology.hashCode();
          return total;
         
        Overrides:
        hashCode in class java.lang.Object
        Returns:
        a suitable hash code
      • toString

        java.lang.String toString()
        Get the value as a String in a recognisable ISO8601 format, only displaying supported fields.

        The string output is in ISO8601 format to enable the String constructor to correctly parse it.

        Overrides:
        toString in class java.lang.Object
        Returns:
        the value as an ISO8601 string