Package org.apache.accumulo.core.iteratorsImpl.system

Class SampleIterator

java.lang.Object

org.apache.accumulo.core.iterators.WrappingIterator

org.apache.accumulo.core.iterators.Filter

org.apache.accumulo.core.iteratorsImpl.system.SampleIterator

All Implemented Interfaces:

OptionDescriber, SortedKeyValueIterator<Key,Value>, YieldingKeyValueIterator<Key,Value>

public class SampleIterator
extends Filter

Nested Class Summary

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

OptionDescriber.IteratorOptions

Field Summary

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

NEGATE

Constructor Summary

Constructors

Constructor	Description
SampleIterator(SortedKeyValueIterator<Key,Value> iter, Sampler sampler)

Method Summary

Modifier and Type	Method	Description
boolean	accept(Key k, Value v)
SortedKeyValueIterator<Key,Value>	deepCopy(IteratorEnvironment env)	Creates a deep copy of this iterator as though seek had not yet been called.

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

describeOptions, findTop, init, 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

Methods inherited from interface org.apache.accumulo.core.iterators.YieldingKeyValueIterator

enableYielding

Constructor Details

SampleIterator

public SampleIterator(SortedKeyValueIterator<Key,Value> iter,
 Sampler sampler)

Method Details

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. A proper implementation would call deepCopy on the source.

Specified by:

deepCopy in interface SortedKeyValueIterator<Key,Value>

Overrides:

deepCopy in class Filter

Parameters:

env - IteratorEnvironment environment in which iterator is being run, provided by Accumulo itself and is expected to be non-null.

Returns:

SortedKeyValueIterator a copy of this iterator (with the same source and settings).