org.calrissian.accumulorecipes.rangestore.iterator

Class ReverseScanFilter

java.lang.Object

org.apache.accumulo.core.iterators.WrappingIterator

org.apache.accumulo.core.iterators.Filter

org.calrissian.accumulorecipes.rangestore.iterator.ReverseScanFilter

All Implemented Interfaces:

org.apache.accumulo.core.iterators.OptionDescriber, org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value>

public class ReverseScanFilter
extends org.apache.accumulo.core.iterators.Filter

Filters out all intervals that have a lower bound greater than the criteria lower bound. This should only be run against data that is upper bound indexed.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.accumulo.core.iterators.OptionDescriber

org.apache.accumulo.core.iterators.OptionDescriber.IteratorOptions

Field Summary

Fields inherited from class org.apache.accumulo.core.iterators.Filter

NEGATE

Constructor Summary

Constructors

Constructor and Description
ReverseScanFilter()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	accept(org.apache.accumulo.core.data.Key key, org.apache.accumulo.core.data.Value value)
void	init(org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value> source, Map<String,String> options, org.apache.accumulo.core.iterators.IteratorEnvironment env)
static void	setQueryLowBound(org.apache.accumulo.core.client.IteratorSetting iterConfig, String queryLowBound) A convenience method for setting the filter condition for the iterator.

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

deepCopy, describeOptions, findTop, next, seek, setNegate, validateOptions

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

getSource, getTopKey, getTopValue, hasTop, setSource

Methods inherited from class java.lang.Object

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

Constructor Detail

ReverseScanFilter

public ReverseScanFilter()

Method Detail

setQueryLowBound

public static void setQueryLowBound(org.apache.accumulo.core.client.IteratorSetting iterConfig,
                    String queryLowBound)

A convenience method for setting the filter condition for the iterator.

Parameters:

iterConfig - Iterator settings to configure

queryLowBound - The normalized representation of the criteria low bound for a range.

init

public void init(org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value> source,
        Map<String,String> options,
        org.apache.accumulo.core.iterators.IteratorEnvironment env)
          throws IOException

Specified by:

init in interface org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value>

Overrides:

init in class org.apache.accumulo.core.iterators.Filter

Throws:

IOException

accept

public boolean accept(org.apache.accumulo.core.data.Key key,
             org.apache.accumulo.core.data.Value value)

Specified by:

accept in class org.apache.accumulo.core.iterators.Filter