org.apache.mahout.cf.taste.impl.recommender.svd
Class AbstractFactorizer
java.lang.Object
org.apache.mahout.cf.taste.impl.recommender.svd.AbstractFactorizer
- All Implemented Interfaces:
- Refreshable, Factorizer
- Direct Known Subclasses:
- ALSWRFactorizer, ParallelSGDFactorizer, RatingSGDFactorizer
public abstract class AbstractFactorizer
- extends Object
- implements Factorizer
base class for Factorizer
s, provides ID to index mapping
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface org.apache.mahout.cf.taste.impl.recommender.svd.Factorizer |
factorize |
AbstractFactorizer
protected AbstractFactorizer(DataModel dataModel)
throws TasteException
- Throws:
TasteException
createFactorization
protected Factorization createFactorization(double[][] userFeatures,
double[][] itemFeatures)
userIndex
protected Integer userIndex(long userID)
itemIndex
protected Integer itemIndex(long itemID)
refresh
public void refresh(Collection<Refreshable> alreadyRefreshed)
- Description copied from interface:
Refreshable
Triggers "refresh" -- whatever that means -- of the implementation. The general contract is that any
Refreshable
should always leave itself in a consistent, operational state, and that the refresh
atomically updates internal state from old to new.
- Specified by:
refresh
in interface Refreshable
- Parameters:
alreadyRefreshed
- Refreshable
s that are known to have already been
refreshed as a result of an initial call to a Refreshable.refresh(Collection)
method on some
object. This ensure that objects in a refresh dependency graph aren't refreshed twice
needlessly.
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