Examples of ec.BreedingPipeline

A BreedingPipeline is a BreedingSource which provides "fresh" individuals which can be used to fill a new population. BreedingPipelines might include Crossover pipelines, various Mutation pipelines, etc. This abstract class provides some default versions of various methods to simplify matters for you. It also contains an array of breeding sources for your convenience. You don't have to use them of course, but this means you have to customize the default methods below to make sure they get distributed to your special sources. Note that these sources may contain references to the same object -- they're not necessarily distinct. This is to provide both some simple DAG features and also to conserve space.

A BreedingPipeline implements SteadyStateBSourceForm, meaning that it receives the individualReplaced(...) and sourcesAreProperForm(...) messages. however by default it doesn't do anything with these except distribute them to its sources. You might override these to do something more interesting.

Parameters

base.`num-sources` int >= 1	(User-specified number of sources to the pipeline. Some pipelines have hard-coded numbers of sources; others indicate (with the java constant DYNAMIC_SOURCES) that the number of sources is determined by this user parameter instead.)
base.`source.`n classname, inherits and != BreedingSource, or the value `same`	(Source n for this BreedingPipeline. If the value is set to `same`, then this source is the exact same source object as base.`source.`n-1, and further parameters for this object will be ignored and treated as the same as those for n-1. `same is not valid for base.source.0)`

Parameter bases

base.source.n Source n

@author Sean Luke @version 1.0

                for(int ind=from[subpop] ; ind < numinds[subpop] - from[subpop]; ind++)
                    newpop.subpops[subpop].individuals[ind] = (Individual)(state.population.subpops[subpop].individuals[ind].clone());
                }
            else
                {
                BreedingPipeline bp = (BreedingPipeline)newpop.subpops[subpop].
                    species.pipe_prototype.clone();
                                                                        
                if (!(state.population.subpops[subpop] instanceof Space))
                    state.output.fatal("Subpopulation " + subpop + " does not implement the Space interface.");
                Space space = (Space)(state.population.subpops[subpop]);
                                                        
                // check to make sure that the breeding pipeline produces
                // the right kind of individuals.  Don't want a mistake there! :-)
                if (!bp.produces(state,newpop,subpop,threadnum))
                    state.output.fatal("The Breeding Pipeline of subpopulation " + subpop + " does not produce individuals of the expected species " + newpop.subpops[subpop].species.getClass().getName() + " or fitness " + newpop.subpops[subpop].species.f_prototype );
                bp.prepareToProduce(state,subpop,threadnum);
                                                        
                // start breedin'!
                for(int x = from[subpop]; x < from[subpop] + numinds[subpop]; x++)
                    {
                    space.setIndex(threadnum, x);
                    if (bp.produce(1, 1, x, subpop, newpop.subpops[subpop].individuals, state, threadnum) != 1)
                        state.output.fatal( "The pipelines should produce one individual at a time!" );
                    }
                                                                        
                bp.finishProducing(state,subpop,threadnum);
                }
            }
        }

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                    newpop.subpops[subpop].individuals[ind] = state.population.subpops[subpop].individuals[ind];
                }
            else
                {
                // do regular breeding of this subpopulation
                BreedingPipeline bp = null;
                if (clonePipelineAndPopulation)
                    bp = (BreedingPipeline)newpop.subpops[subpop].species.pipe_prototype.clone();
                else
                    bp = (BreedingPipeline)newpop.subpops[subpop].species.pipe_prototype;
                                        
                // check to make sure that the breeding pipeline produces
                // the right kind of individuals.  Don't want a mistake there! :-)
                int x;
                if (!bp.produces(state,newpop,subpop,threadnum))
                    state.output.fatal("The Breeding Pipeline of subpopulation " + subpop + " does not produce individuals of the expected species " + newpop.subpops[subpop].species.getClass().getName() + " or fitness " + newpop.subpops[subpop].species.f_prototype );
                bp.prepareToProduce(state,subpop,threadnum);
                                        
                // start breedin'!
                                        
                x=from[subpop];
                int upperbound = from[subpop]+numinds[subpop];
                while(x<upperbound)
                    x += bp.produce(1,upperbound-x,x,subpop,
                        newpop.subpops[subpop].individuals,
                        state,threadnum);
                if (x>upperbound) // uh oh!  Someone blew it!
                    state.output.fatal("Whoa!  A breeding pipeline overwrote the space of another pipeline in subpopulation " + subpop + ".  You need to check your breeding pipeline code (in produce() ).");


                bp.finishProducing(state,subpop,threadnum);
                }
            }
        }

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Related Classes of ec.BreedingPipeline

ec.simple.SimpleBreeder

ec.spatial.SpatialBreeder

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