public SVDRecommender(DataModel dataModel, Factorizer factorizer, CandidateItemsStrategy candidateItemsStrategy, PersistenceStrategy persistenceStrategy)
: base(dataModel, candidateItemsStrategy)
{
Action refreshRunnable = null;
this.factorizer = factorizer;
this.persistenceStrategy = persistenceStrategy;
try
{
this.factorization = persistenceStrategy.load();
}
catch (IOException exception)
{
throw new TasteException("Error loading factorization", exception);
}
if (this.factorization == null)
{
this.train();
}
if (refreshRunnable == null)
{
refreshRunnable = () => this.train();
}
this.refreshHelper = new RefreshHelper(refreshRunnable);
this.refreshHelper.addDependency(this.getDataModel());
this.refreshHelper.addDependency(factorizer);
this.refreshHelper.addDependency(candidateItemsStrategy);
}
public KnnItemBasedRecommender(DataModel dataModel,
ItemSimilarity similarity,
Optimizer optimizer,
CandidateItemsStrategy candidateItemsStrategy,
MostSimilarItemsCandidateItemsStrategy mostSimilarItemsCandidateItemsStrategy,
int neighborhoodSize) :
base(dataModel, similarity, candidateItemsStrategy, mostSimilarItemsCandidateItemsStrategy)
{
this.optimizer = optimizer;
this.neighborhoodSize = neighborhoodSize;
}
public GenericItemBasedRecommender(DataModel dataModel, ItemSimilarity similarity, CandidateItemsStrategy candidateItemsStrategy, MostSimilarItemsCandidateItemsStrategy mostSimilarItemsCandidateItemsStrategy)
: base(dataModel, candidateItemsStrategy)
{
Action refreshRunnable = null;
this.similarity = similarity;
this.mostSimilarItemsCandidateItemsStrategy = mostSimilarItemsCandidateItemsStrategy;
if (refreshRunnable == null)
{
refreshRunnable = () => this.capper = this.buildCapper();
}
this.refreshHelper = new RefreshHelper(refreshRunnable);
this.refreshHelper.addDependency(dataModel);
this.refreshHelper.addDependency(similarity);
this.refreshHelper.addDependency(candidateItemsStrategy);
this.refreshHelper.addDependency(mostSimilarItemsCandidateItemsStrategy);
this.capper = this.buildCapper();
}
protected AbstractRecommender(DataModel dataModel, CandidateItemsStrategy candidateItemsStrategy)
{
this.dataModel = dataModel;
this.candidateItemsStrategy = candidateItemsStrategy;
}
public SVDRecommender(DataModel dataModel, Factorizer factorizer, CandidateItemsStrategy candidateItemsStrategy)
: this(dataModel, factorizer, candidateItemsStrategy, getDefaultPersistenceStrategy())
{
}
public GenericBooleanPrefItemBasedRecommender(DataModel dataModel, ItemSimilarity similarity, CandidateItemsStrategy candidateItemsStrategy, MostSimilarItemsCandidateItemsStrategy mostSimilarItemsCandidateItemsStrategy)
: base(dataModel, similarity, candidateItemsStrategy, mostSimilarItemsCandidateItemsStrategy)
{
}
