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public static interface ReduceContext.ValueIterator<VALUEIN>
Iterator
to iterate over values for a given group of records.
Method Summary | |
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void |
clearMark()
Clear any previously set mark |
void |
mark()
Mark the current record. |
void |
reset()
Reset the iterator to the last record before a call to the previous mark |
void |
resetBackupStore()
This method is called when the reducer moves from one key to another. |
Methods inherited from interface java.util.Iterator |
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hasNext, next, remove |
Method Detail |
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void resetBackupStore() throws IOException
IOException
void mark() throws IOException
IOException
void reset() throws IOException
IOException
void clearMark() throws IOException
IOException
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