net.sf.mpxj

Class Duration

java.lang.Object

net.sf.mpxj.Duration

All Implemented Interfaces:

Comparable<Duration>

public final class Duration
extends Object
implements Comparable<Duration>

This represents time durations as specified in an MPX file.

Method Summary

Modifier and Type	Method and Description
static Duration	add(Duration a, Duration b, TimeUnitDefaultsContainer defaults) If a and b are not null, returns a new duration of a + b.
int	compareTo(Duration rhs)
static Duration	convertUnits(double duration, TimeUnit fromUnits, TimeUnit toUnits, double minutesPerDay, double minutesPerWeek, double daysPerMonth) This method provides an approximate conversion between duration units.
static Duration	convertUnits(double duration, TimeUnit fromUnits, TimeUnit toUnits, TimeUnitDefaultsContainer defaults) This method provides an approximate conversion between duration units.
Duration	convertUnits(TimeUnit type, TimeUnitDefaultsContainer defaults) This method provides an approximate conversion between duration units.
boolean	durationComponentEquals(Duration rhs) Equality test for duration component of a Duration instance.
static boolean	durationValueEquals(double lhs, double rhs) Equality test for two duration values.
boolean	equals(Object o)
double	getDuration() This method is used to retrieve the size of the duration.
static Duration	getInstance(double duration, TimeUnit type) Retrieve a Duration instance.
static Duration	getInstance(int duration, TimeUnit type) Retrieve a Duration instance.
TimeUnit	getUnits() This method is used to retrieve the type of units the duration is expressed in.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

getDuration

public double getDuration()

This method is used to retrieve the size of the duration.

Returns:

size of the duration

getUnits

public TimeUnit getUnits()

This method is used to retrieve the type of units the duration is expressed in. The valid types of units are found in the TimeUnit class.

Returns:

type of units

convertUnits

public Duration convertUnits(TimeUnit type,
                             TimeUnitDefaultsContainer defaults)

This method provides an approximate conversion between duration units. It does take into account the project defaults for number of hours in a day and a week, but it does not take account of calendar details. The results obtained from it should therefore be treated with caution.

Parameters:

type - target duration type

defaults - project properties containing default values

Returns:

new Duration instance

convertUnits

public static Duration convertUnits(double duration,
                                    TimeUnit fromUnits,
                                    TimeUnit toUnits,
                                    TimeUnitDefaultsContainer defaults)

This method provides an approximate conversion between duration units. It does take into account the project defaults for number of hours in a day and a week, but it does not take account of calendar details. The results obtained from it should therefore be treated with caution.

Parameters:

duration - duration value

fromUnits - units to convert from

toUnits - units to convert to

defaults - project properties containing default values

Returns:

new Duration instance

convertUnits

public static Duration convertUnits(double duration,
                                    TimeUnit fromUnits,
                                    TimeUnit toUnits,
                                    double minutesPerDay,
                                    double minutesPerWeek,
                                    double daysPerMonth)

This method provides an approximate conversion between duration units. It does take into account the project defaults for number of hours in a day and a week, but it does not take account of calendar details. The results obtained from it should therefore be treated with caution.

Parameters:

duration - duration value

fromUnits - units to convert from

toUnits - units to convert to

minutesPerDay - number of minutes per day

minutesPerWeek - number of minutes per week

daysPerMonth - number of days per month

Returns:

new Duration instance

getInstance

public static Duration getInstance(double duration,
                                   TimeUnit type)

Retrieve a Duration instance. Use shared objects to represent common values for memory efficiency.

Parameters:

duration - duration value

type - duration type

Returns:

Duration instance

getInstance

public static Duration getInstance(int duration,
                                   TimeUnit type)

Retrieve a Duration instance. Use shared objects to represent common values for memory efficiency.

Parameters:

duration - duration value

type - duration type

Returns:

Duration instance

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

compareTo

public int compareTo(Duration rhs)

Specified by:

compareTo in interface Comparable<Duration>

durationComponentEquals

public boolean durationComponentEquals(Duration rhs)

Equality test for duration component of a Duration instance. Note that this does not take into account the units - use with care!

Parameters:

rhs - duration to compare

Returns:

true if duration components are equal, within the allowable delta

durationValueEquals

public static boolean durationValueEquals(double lhs,
                                          double rhs)

Equality test for two duration values.

Parameters:

lhs - duration value

rhs - duration value

Returns:

true if duration values are equal, within the allowable delta

add

public static Duration add(Duration a,
                           Duration b,
                           TimeUnitDefaultsContainer defaults)

If a and b are not null, returns a new duration of a + b. If a is null and b is not null, returns b. If a is not null and b is null, returns a. If a and b are null, returns null. If needed, b is converted to a's time unit using the project properties.

Parameters:

a - first duration

b - second duration

defaults - project properties containing default values

Returns:

a + b

toString

public String toString()

Overrides:

toString in class Object