org.apache.accumulo.core.iterators.user
Class GrepIterator
java.lang.Object
org.apache.accumulo.core.iterators.WrappingIterator
org.apache.accumulo.core.iterators.Filter
org.apache.accumulo.core.iterators.user.GrepIterator
- All Implemented Interfaces:
- OptionDescriber, SortedKeyValueIterator<Key,Value>
- Direct Known Subclasses:
- GrepIterator
public class GrepIterator
- extends Filter
This iterator provides exact string matching. It searches both the Key and Value for the string. The string to match is specified by the "term" option.
Fields inherited from class org.apache.accumulo.core.iterators.Filter |
NEGATE |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
GrepIterator
public GrepIterator()
accept
public boolean accept(Key k,
Value v)
- Specified by:
accept
in class Filter
- Returns:
- true if the key/value pair is accepted by the filter.
deepCopy
public SortedKeyValueIterator<Key,Value> 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 Filter
- Parameters:
env
- IteratorEnvironment environment in which iterator is being run.
- Returns:
- SortedKeyValueIterator a copy of this iterator (with the same source and settings).
init
public void init(SortedKeyValueIterator<Key,Value> source,
Map<String,String> options,
IteratorEnvironment env)
throws IOException
- 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 Filter
- 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.
- Throws:
IOException
- unused.
setTerm
public static void setTerm(IteratorSetting cfg,
String term)
- Encode the grep term as an option for a ScanIterator
Copyright © 2015 Apache Accumulo Project. All rights reserved.