org.apache.accumulo.core.iterators.system
Class DeletingIterator
java.lang.Object
org.apache.accumulo.core.iterators.WrappingIterator
org.apache.accumulo.core.iterators.system.DeletingIterator
- All Implemented Interfaces:
- SortedKeyValueIterator<Key,Value>
public class DeletingIterator
- extends WrappingIterator
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
DeletingIterator
public DeletingIterator(DeletingIterator other,
IteratorEnvironment env)
DeletingIterator
public DeletingIterator()
DeletingIterator
public DeletingIterator(SortedKeyValueIterator<Key,Value> iterator,
boolean propogateDeletes)
throws IOException
- Throws:
IOException
deepCopy
public DeletingIterator deepCopy(IteratorEnvironment env)
- Description copied from interface:
SortedKeyValueIterator
- Creates a deep copy of this iterator as though seek had not yet been called. init should be called on an iterator before deepCopy is called. init should
not need to be called on the copy that is returned by deepCopy; that is, when necessary init should be called in the deepCopy method on the iterator it
returns. The behavior is unspecified if init is called after deepCopy either on the original or the copy.
- Specified by:
deepCopy
in interface SortedKeyValueIterator<Key,Value>
- Overrides:
deepCopy
in class WrappingIterator
- Parameters:
env
- IteratorEnvironment environment in which iterator is being run.
- Returns:
- SortedKeyValueIterator a copy of this iterator (with the same source and settings).
next
public void next()
throws IOException
- Description copied from interface:
SortedKeyValueIterator
- Advances to the next K,V pair. Note that in minor compaction scope and in non-full major compaction scopes the iterator may see deletion entries. These
entries should be preserved by all iterators except ones that are strictly scan-time iterators that will never be configured for the minc or majc scopes.
Deletion entries are only removed during full major compactions.
- Specified by:
next
in interface SortedKeyValueIterator<Key,Value>
- Overrides:
next
in class WrappingIterator
- Throws:
IOException
- if an I/O error occurs.
seek
public void seek(Range range,
Collection<ByteSequence> columnFamilies,
boolean inclusive)
throws IOException
- Description copied from interface:
SortedKeyValueIterator
- Seeks to the first key in the Range, restricting the resulting K,V pairs to those with the specified columns. 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:
IOException
- if an I/O error occurs.
init
public void init(SortedKeyValueIterator<Key,Value> source,
Map<String,String> options,
IteratorEnvironment env)
- Description copied from interface:
SortedKeyValueIterator
- Initializes the iterator. Data should not be read from the source in this method.
- Specified by:
init
in interface SortedKeyValueIterator<Key,Value>
- Overrides:
init
in class WrappingIterator
- Parameters:
source
- SortedKeyValueIterator source to read data from.options
- Map map of string option names to option values.env
- IteratorEnvironment environment in which iterator is being run.
Copyright © 2012 The Apache Software Foundation. All Rights Reserved.