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java.lang.Objectorg.apache.mahout.cf.taste.hadoop.TasteHadoopUtils
public final class TasteHadoopUtils
Some helper methods for the hadoop-related stuff in org.apache.mahout.cf.taste
Field Summary | |
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static int |
ITEM_ID_POS
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static int |
USER_ID_POS
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Method Summary | |
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static int |
idToIndex(long id)
Maps a long to an int with range of 0 to Integer.MAX_VALUE-1 |
static int |
readID(String token,
boolean usesLongIDs)
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static OpenIntLongHashMap |
readIDIndexMap(String idIndexPathStr,
org.apache.hadoop.conf.Configuration conf)
Reads a binary mapping file |
static String[] |
splitPrefTokens(CharSequence line)
Splits a preference data line into string tokens |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final int USER_ID_POS
public static final int ITEM_ID_POS
Method Detail |
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public static String[] splitPrefTokens(CharSequence line)
public static int idToIndex(long id)
public static int readID(String token, boolean usesLongIDs)
public static OpenIntLongHashMap readIDIndexMap(String idIndexPathStr, org.apache.hadoop.conf.Configuration conf)
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