biweekly.util
Class Duration

java.lang.Object
  biweekly.util.Duration

public final class Duration
extends Object

Represents a period of time (for example, "2 hours and 30 minutes").

This class is immutable. Use the builder() method to construct a new instance, or the parse(java.lang.String) method to parse a duration string.

Examples:

 Duration duration = Duration.builder().hours(2).minutes(30).build();
 Duration duration = Duration.parse("PT2H30M");
 
 //add a duration value to a Date
 Date start = ...
 Date end = duration.add(start);
 

Author:

Michael Angstadt

Nested Class Summary

static class

Duration.Builder Builds Duration objects.

Method Summary

Date	add(Date date) Adds this duration value to a Date object.
static Duration.Builder	builder() Creates a builder object for constructing new instances of this class.
static Duration	diff(Date start, Date end) Builds a duration based on the difference between two dates.
boolean	equals(Object obj)
static Duration	fromMillis(long milliseconds) Builds a duration from a number of milliseconds.
Integer	getDays() Gets the number of days.
Integer	getHours() Gets the number of hours.
Integer	getMinutes() Gets the number of minutes.
Integer	getSeconds() Gets the number of seconds.
Integer	getWeeks() Gets the number of weeks.
int	hashCode()
boolean	hasTime() Determines if any time components are present.
boolean	isPrior() Gets whether the duration is negative.
static Duration	parse(String value) Parses a duration string.
long	toMillis() Converts the duration value to milliseconds.
String	toString() Converts the duration to its string representation.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

parse

public static Duration parse(String value)

Parses a duration string.

Parameters:

value - the duration string (e.g. "P30DT10H")

Returns:

the parsed duration

Throws:

IllegalArgumentException - if the duration string is invalid

diff

public static Duration diff(Date start,
                            Date end)

Builds a duration based on the difference between two dates.

Parameters:

start - the start date

end - the end date

Returns:

the duration

fromMillis

public static Duration fromMillis(long milliseconds)

Builds a duration from a number of milliseconds.

Parameters:

milliseconds - the number of milliseconds

Returns:

the duration

builder

public static Duration.Builder builder()

Creates a builder object for constructing new instances of this class.

Returns:

the builder object

isPrior

public boolean isPrior()

Gets whether the duration is negative.

Returns:

true if it's negative, false if not

getWeeks

public Integer getWeeks()

Gets the number of weeks.

Returns:

the number of weeks or null if not set

getDays

public Integer getDays()

Gets the number of days.

Returns:

the number of days or null if not set

getHours

public Integer getHours()

Gets the number of hours.

Returns:

the number of hours or null if not set

getMinutes

public Integer getMinutes()

Gets the number of minutes.

Returns:

the number of minutes or null if not set

getSeconds

public Integer getSeconds()

Gets the number of seconds.

Returns:

the number of seconds or null if not set

add

public Date add(Date date)

Adds this duration value to a Date object.

Parameters:

date - the date to add to

Returns:

the new date value

toMillis

public long toMillis()

Converts the duration value to milliseconds.

Returns:

the duration value in milliseconds (will be negative if isPrior() is true)

hasTime

public boolean hasTime()

Determines if any time components are present.

Returns:

true if the duration has at least one time component, false if not

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Converts the duration to its string representation.

Overrides:

toString in class Object

Returns:

the string representation (e.g. "P4DT1H" for "4 days and 1 hour")