org.apache.accumulo.core.iterators
Class SkippingIterator

java.lang.Object
  org.apache.accumulo.core.iterators.WrappingIterator
      org.apache.accumulo.core.iterators.SkippingIterator

All Implemented Interfaces:

SortedKeyValueIterator<Key,Value>

Direct Known Subclasses:

ColumnFamilySkippingIterator, FirstEntryInRowIterator, GrepIterator, NoLabelIterator, RegExIterator

public abstract class SkippingIterator
extends WrappingIterator

Constructor Summary

SkippingIterator()

Method Summary

protected abstract void	consume()
void	next() Advances to the next K,V pair.
void	seek(Range range, java.util.Collection<ByteSequence> columnFamilies, boolean inclusive) An iterator must seek to the first key in the range taking inclusiveness into account.

Methods inherited from class org.apache.accumulo.core.iterators.WrappingIterator

deepCopy, getSource, getTopKey, getTopValue, hasTop, init, setSource

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SkippingIterator

public SkippingIterator()

Method Detail

next

public void next()
          throws java.io.IOException

Description copied from interface: SortedKeyValueIterator

Advances to the next K,V pair.

Specified by:

next in interface SortedKeyValueIterator<Key,Value>

Overrides:

next in class WrappingIterator

Throws:

java.io.IOException - if an I/O error occurs.

consume

protected abstract void consume()
                         throws java.io.IOException

Throws:

java.io.IOException

seek

public void seek(Range range,
                 java.util.Collection<ByteSequence> columnFamilies,
                 boolean inclusive)
          throws java.io.IOException

Description copied from interface: SortedKeyValueIterator

An iterator must seek to the first key in the range taking inclusiveness into account. However, an iterator does not have to stop at the end of the range. The whole range is provided so that iterators can make optimizations.

Specified by:

seek in interface SortedKeyValueIterator<Key,Value>

Overrides:

seek in class WrappingIterator

Parameters:

range - Range of keys to iterate over.

columnFamilies - Collection of column families to include or exclude.

inclusive - boolean that indicates whether to include (true) or exclude (false) column families.

Throws:

java.io.IOException - if an I/O error occurs.