eu.bandm.music.entities

Class Metric2Duration

java.lang.Object

eu.bandm.music.entities.Metric2Duration

public class Metric2Duration
extends Object

Lists all note values which may be used at a certain metric position in a bar. Some things are quite natural and have a canonical decision: E.g. normally you do not want a half note starting one-eights after the start of the bar. A doubly-dotted half note but may be permitted. In a four-quarter bar it is a matter of taste whether you allow a dotted quarter on the "two" beat (one quarter after the start of the bar). And whether you allow a syncopized half note or prefer to write it using a tie. So there are some default methods for filling a Metric2Duration according to some standards. You are free to create a modifiable clone of these and adjust them to your needs.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Metric2Duration.TreeMultimap<A,B>

Field Summary

Fields

Modifier and Type	Field and Description
static Rational	ONE_HALF
static Metric2Duration	standard_1_4
static Metric2Duration	standard_1_8
static Metric2Duration	standard_2_4
static Metric2Duration	standard_4_4

Constructor Summary

Constructors

Constructor and Description
Metric2Duration(Rational barLength)

Method Summary

Methods

Modifier and Type	Method and Description
Metric2Duration	add(int posNum, int posDen, int durNum, int durDen) Allows at a certain position a certain duration.
Metric2Duration	add(Multimap<Rational,Rational> additional) Adds for certain positions a set of allowed durations each.
Metric2Duration	add(Rational pos, Rational dur) Allows at a certain position a certain duration.
Metric2Duration	addAllDoubleAlignedDotted(Rational baseValue, int maxDotCount) Adds all dotted versions up to the given dot count of the given base value to all metric positions where it either starts or ends on an integer multiple of its double value.
Metric2Duration	addIncreasingDoubleAlignedDotted(Rational startValue, int startDotCount)
Multimap<Rational,Rational>	getAllowed()
Rational	getLongestAllowed(Rational pos, Rational dur) returns null iff no lower limit at this metric position.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ONE_HALF

public static final Rational ONE_HALF

standard_1_8

public static final Metric2Duration standard_1_8

standard_1_4

public static final Metric2Duration standard_1_4

standard_2_4

public static final Metric2Duration standard_2_4

standard_4_4

public static final Metric2Duration standard_4_4

Constructor Detail

Metric2Duration

public Metric2Duration(Rational barLength)

Method Detail

getAllowed

public Multimap<Rational,Rational> getAllowed()

getLongestAllowed

public Rational getLongestAllowed(Rational pos,
                         Rational dur)

returns null iff no lower limit at this metric position. On caller level, this is mostly an error!

add

public Metric2Duration add(Multimap<Rational,Rational> additional)

Adds for certain positions a set of allowed durations each.

add

public Metric2Duration add(Rational pos,
                  Rational dur)

Allows at a certain position a certain duration.

add

public Metric2Duration add(int posNum,
                  int posDen,
                  int durNum,
                  int durDen)

Allows at a certain position a certain duration.

addAllDoubleAlignedDotted

public Metric2Duration addAllDoubleAlignedDotted(Rational baseValue,
                                        int maxDotCount)

Adds all dotted versions up to the given dot count of the given base value to all metric positions where it either starts or ends on an integer multiple of its double value. E.g.

   quarter     0  .  .   .  1   .   .   .   2   .   .   .  3   .   .   .  |
   starts of quarter without dots:
               X            X               X              X 
   starts of dotted quarter:
               X     X                      X       X 
   starts of double dotted quarter:
               X  X                         X   X 

   starts of dotted eighth:
               X  X         X   X           X   X          X   X    
 

addIncreasingDoubleAlignedDotted

public Metric2Duration addIncreasingDoubleAlignedDotted(Rational startValue,
                                               int startDotCount)