ec
Class SelectionMethod
java.lang.Object
|
+--ec.BreedingSource
|
+--ec.SelectionMethod
- Direct Known Subclasses:
- BestSelection, ESSelection, FirstSelection, FitProportionateSelection, GreedyOverselection, MultiSelection, TournamentSelection
- public abstract class SelectionMethod
- extends BreedingSource
A SelectionMethod is a BreedingSource which provides direct IMMUTABLE pointers
to original individuals in an old population, not fresh mutable copies.
If you use a SelectionMethod as your BreedingSource, you must
SelectionMethods might include Tournament Selection, Fitness Proportional Selection, etc.
SelectionMethods don't have parent sources.
Typical Number of Individuals Produced Per produce(...) call
Always 1.
- See Also:
- Serialized Form
Method Summary |
void |
finishProducing(EvolutionState s,
int subpopulation,
int thread)
A default version of finishProducing, which does nothing. |
void |
preparePipeline(java.lang.Object hook)
A hook which should be passed to all your subsidiary breeding
sources. |
void |
prepareToProduce(EvolutionState s,
int subpopulation,
int thread)
A default version of prepareToProduce which does nothing. |
abstract int |
produce(int subpopulation,
EvolutionState state,
int thread)
An alternative form of "produce" special to Selection Methods;
selects an individual from the given subpopulation and
returns its position in that subpopulation. |
int |
produce(int min,
int max,
int start,
int subpopulation,
Individual[] inds,
EvolutionState state,
int thread)
Produces n individuals from the given subpopulation
and puts them into inds[start...start+n-1],
where n = Min(Max(q,min),max), where q is the "typical" number of
individuals the BreedingSource produces in one shot, and returns
n. |
boolean |
produces(EvolutionState state,
Population newpop,
int subpopulation,
int thread)
A default version of produces -- this method always returns
true under the assumption that the selection method works
with all Fitnesses. |
int |
typicalIndsProduced()
Returns 1 (the typical default value) |
Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
INDS_PRODUCED
public static final int INDS_PRODUCED
SelectionMethod
public SelectionMethod()
typicalIndsProduced
public int typicalIndsProduced()
- Returns 1 (the typical default value)
- Overrides:
- typicalIndsProduced in class BreedingSource
produce
public abstract int produce(int subpopulation,
EvolutionState state,
int thread)
- An alternative form of "produce" special to Selection Methods;
selects an individual from the given subpopulation and
returns its position in that subpopulation.
produces
public boolean produces(EvolutionState state,
Population newpop,
int subpopulation,
int thread)
- A default version of produces -- this method always returns
true under the assumption that the selection method works
with all Fitnesses. If this isn't the case, you should override
this to return your own assessment.
- Overrides:
- produces in class BreedingSource
prepareToProduce
public void prepareToProduce(EvolutionState s,
int subpopulation,
int thread)
- A default version of prepareToProduce which does nothing.
- Overrides:
- prepareToProduce in class BreedingSource
finishProducing
public void finishProducing(EvolutionState s,
int subpopulation,
int thread)
- A default version of finishProducing, which does nothing.
produce
public int produce(int min,
int max,
int start,
int subpopulation,
Individual[] inds,
EvolutionState state,
int thread)
throws java.lang.CloneNotSupportedException
- Description copied from class: BreedingSource
- Produces n individuals from the given subpopulation
and puts them into inds[start...start+n-1],
where n = Min(Max(q,min),max), where q is the "typical" number of
individuals the BreedingSource produces in one shot, and returns
n. max must be >= min, and min must be >= 1. For example, crossover
might typically produce two individuals, tournament selection might typically
produce a single individual, etc.
- Overrides:
- produce in class BreedingSource
preparePipeline
public void preparePipeline(java.lang.Object hook)
- Description copied from class: BreedingSource
- A hook which should be passed to all your subsidiary breeding
sources. If you are a BreedingPipeline and you
implement your sources in a way different
than using the sources[] array, be sure to override this method
so that it calls preparePipeline(hook) on all of your sources.
This method might get called more than once, and by various objects
as needed. If you use it, you should determine somehow how to use
it to send information under the assumption that it might be sent
by nested items in the pipeline; you don't want to scribble over
each other's calls! Note that this method should travel *all*
breeding source paths regardless of whether or not it's redundant to
do so.
- Overrides:
- preparePipeline in class BreedingSource