org.apache.mahout.cf.taste.impl.similarity.jdbc
Class SQL92JDBCInMemoryItemSimilarity

java.lang.Object
  extended by org.apache.mahout.cf.taste.impl.common.jdbc.AbstractJDBCComponent
      extended by org.apache.mahout.cf.taste.impl.similarity.jdbc.SQL92JDBCInMemoryItemSimilarity
All Implemented Interfaces:
Refreshable, ItemSimilarity
Direct Known Subclasses:
MySQLJDBCInMemoryItemSimilarity

public class SQL92JDBCInMemoryItemSimilarity
extends AbstractJDBCComponent


Field Summary
 
Fields inherited from class org.apache.mahout.cf.taste.impl.common.jdbc.AbstractJDBCComponent
DEFAULT_DATASOURCE_NAME
 
Constructor Summary
SQL92JDBCInMemoryItemSimilarity()
           
SQL92JDBCInMemoryItemSimilarity(DataSource dataSource)
           
SQL92JDBCInMemoryItemSimilarity(DataSource dataSource, String getAllItemSimilaritiesSQL)
           
SQL92JDBCInMemoryItemSimilarity(String dataSourceName)
           
 
Method Summary
 long[] allSimilarItemIDs(long itemID)
           
 double[] itemSimilarities(long itemID1, long[] itemID2s)
           
 double itemSimilarity(long itemID1, long itemID2)
           
 void refresh(Collection<Refreshable> alreadyRefreshed)
           
protected  void reload()
           
 
Methods inherited from class org.apache.mahout.cf.taste.impl.common.jdbc.AbstractJDBCComponent
checkNotNullAndLog, checkNotNullAndLog, getFetchSize, lookupDataSource
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SQL92JDBCInMemoryItemSimilarity

public SQL92JDBCInMemoryItemSimilarity()
                                throws TasteException
Throws:
TasteException

SQL92JDBCInMemoryItemSimilarity

public SQL92JDBCInMemoryItemSimilarity(String dataSourceName)
                                throws TasteException
Throws:
TasteException

SQL92JDBCInMemoryItemSimilarity

public SQL92JDBCInMemoryItemSimilarity(DataSource dataSource)

SQL92JDBCInMemoryItemSimilarity

public SQL92JDBCInMemoryItemSimilarity(DataSource dataSource,
                                       String getAllItemSimilaritiesSQL)
Method Detail

itemSimilarity

public double itemSimilarity(long itemID1,
                             long itemID2)
                      throws TasteException
Specified by:
itemSimilarity in interface ItemSimilarity
Throws:
TasteException

itemSimilarities

public double[] itemSimilarities(long itemID1,
                                 long[] itemID2s)
                          throws TasteException
Specified by:
itemSimilarities in interface ItemSimilarity
Throws:
TasteException

allSimilarItemIDs

public long[] allSimilarItemIDs(long itemID)
                         throws TasteException
Specified by:
allSimilarItemIDs in interface ItemSimilarity
Throws:
TasteException

refresh

public void refresh(Collection<Refreshable> alreadyRefreshed)
Specified by:
refresh in interface Refreshable

reload

protected void reload()


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