Package org.joda.time

Interface ReadablePartial

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

public interface ReadablePartial extends 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
Author:
Stephen Colebourne
  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    equals(Object partial)
    Compares this partial with the specified object for equality based on the supported fields, chronology and values.
    int
    Gets the value of one of the fields.
    Gets the chronology of the partial which is never null.
    getField(int index)
    Gets the field at the specified index.
    getFieldType(int index)
    Gets the field type at the specified index.
    int
    getValue(int index)
    Gets the value at the specified index.
    int
    Gets a hash code for the partial that is compatible with the equals method.
    boolean
    Checks whether the field type specified is supported by this partial.
    int
    Gets the number of fields that this partial supports.
    Converts this partial to a full datetime by resolving it against another datetime.
    Get the value as a String in a recognisable ISO8601 format, only displaying supported fields.

    Methods inherited from interface java.lang.Comparable

    compareTo
  • Method Details

    • 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:
      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:
      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:
      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:
      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(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 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 invalid input: '<' fields.length; i++) {
            total = 23 * total + values[i];
            total = 23 * total + fieldTypes[i].hashCode();
        }
        total += chronology.hashCode();
        return total;
       
      Overrides:
      hashCode in class Object
      Returns:
      a suitable hash code
    • toString

      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 Object
      Returns:
      the value as an ISO8601 string