Package org.apache.accumulo.iteratortest

Class SimpleKVReusingIterator

java.lang.Object

org.apache.accumulo.iteratortest.SimpleKVReusingIterator

All Implemented Interfaces:

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

public class SimpleKVReusingIterator
extends Object
implements SortedKeyValueIterator<Key,Value>

Internally, Accumulo reuses the same instance of Key and Value to reduce the number of objects to be garbage collected. This iterator simulates that.

Constructor Summary

Constructors

Constructor	Description
SimpleKVReusingIterator(SortedKeyValueIterator<Key,Value> source)

Method Summary

Modifier and Type	Method	Description
SortedKeyValueIterator<Key,Value>	deepCopy(IteratorEnvironment env)
Key	getTopKey()
Value	getTopValue()
boolean	hasTop()
void	init(SortedKeyValueIterator<Key,Value> source, Map<String,String> options, IteratorEnvironment env)
void	next()
void	seek(Range range, Collection<ByteSequence> columnFamilies, boolean inclusive)

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 Detail

SimpleKVReusingIterator

public SimpleKVReusingIterator(SortedKeyValueIterator<Key,Value> source)

Method Detail

init

public void init(SortedKeyValueIterator<Key,Value> source,
                 Map<String,String> options,
                 IteratorEnvironment env)
          throws IOException

Specified by:

init in interface SortedKeyValueIterator<Key,Value>

Throws:

IOException

hasTop

public boolean hasTop()

Specified by:

hasTop in interface SortedKeyValueIterator<Key,Value>

next

public void next()
          throws IOException

Specified by:

next in interface SortedKeyValueIterator<Key,Value>

Throws:

IOException

seek

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

Specified by:

seek in interface SortedKeyValueIterator<Key,Value>

Throws:

IOException

getTopKey

public Key getTopKey()

Specified by:

getTopKey in interface SortedKeyValueIterator<Key,Value>

getTopValue

public Value getTopValue()

Specified by:

getTopValue in interface SortedKeyValueIterator<Key,Value>

deepCopy

public SortedKeyValueIterator<Key,Value> deepCopy(IteratorEnvironment env)

Specified by:

deepCopy in interface SortedKeyValueIterator<Key,Value>