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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 org.apache.hadoop.fs.PathFilter |
PARTS_FILTER
A path filter used to read files written by Hadoop. |
Method Summary | |
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static int |
idToIndex(long id)
Maps a long to an int |
static int |
readIntFromFile(org.apache.hadoop.conf.Configuration conf,
org.apache.hadoop.fs.Path outputDir)
Reads a text-based outputfile that only contains an int |
static org.apache.mahout.math.map.OpenIntLongHashMap |
readItemIDIndexMap(java.lang.String itemIDIndexPathStr,
org.apache.hadoop.conf.Configuration conf)
Reads a binary mapping file |
static java.lang.String[] |
splitPrefTokens(java.lang.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 org.apache.hadoop.fs.PathFilter PARTS_FILTER
Method Detail |
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public static java.lang.String[] splitPrefTokens(java.lang.CharSequence line)
public static int idToIndex(long id)
public static org.apache.mahout.math.map.OpenIntLongHashMap readItemIDIndexMap(java.lang.String itemIDIndexPathStr, org.apache.hadoop.conf.Configuration conf)
public static int readIntFromFile(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.Path outputDir) throws java.io.IOException
java.io.IOException
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