org.teiid.translator.accumulo

Class CountStarIterator

java.lang.Object

org.apache.accumulo.core.iterators.WrappingIterator

org.teiid.translator.accumulo.CountStarIterator

All Implemented Interfaces:

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

public class CountStarIterator
extends org.apache.accumulo.core.iterators.WrappingIterator

Implements aggregate function Count(*) over Accumulo

Field Summary

Fields

Modifier and Type	Field and Description
static String	ALIAS

Constructor Summary

Constructors

Constructor and Description
CountStarIterator()

Method Summary

Modifier and Type	Method and Description
org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value>	deepCopy(org.apache.accumulo.core.iterators.IteratorEnvironment env)
org.apache.accumulo.core.data.Key	getTopKey()
org.apache.accumulo.core.data.Value	getTopValue()
boolean	hasTop()
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)
void	next()
void	seek(org.apache.accumulo.core.data.Range range, Collection<org.apache.accumulo.core.data.ByteSequence> columnFamilies, boolean inclusive)

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

getSource, setSource

Methods inherited from class java.lang.Object

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

Field Detail

ALIAS

public static final String ALIAS

See Also:

Constant Field Values

Constructor Detail

CountStarIterator

public CountStarIterator()

Method Detail

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.WrappingIterator

Throws:

IOException

deepCopy

public org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value> deepCopy(org.apache.accumulo.core.iterators.IteratorEnvironment env)

Specified by:

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

Overrides:

deepCopy in class org.apache.accumulo.core.iterators.WrappingIterator

seek

public void seek(org.apache.accumulo.core.data.Range range,
                 Collection<org.apache.accumulo.core.data.ByteSequence> columnFamilies,
                 boolean inclusive)
          throws IOException

Specified by:

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

Overrides:

seek in class org.apache.accumulo.core.iterators.WrappingIterator

Throws:

IOException

getTopValue

public org.apache.accumulo.core.data.Value getTopValue()

Specified by:

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

Overrides:

getTopValue in class org.apache.accumulo.core.iterators.WrappingIterator

getTopKey

public org.apache.accumulo.core.data.Key getTopKey()

Specified by:

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

Overrides:

getTopKey in class org.apache.accumulo.core.iterators.WrappingIterator

hasTop

public boolean hasTop()

Specified by:

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

Overrides:

hasTop in class org.apache.accumulo.core.iterators.WrappingIterator

next

public void next()
          throws IOException

Specified by:

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

Overrides:

next in class org.apache.accumulo.core.iterators.WrappingIterator

Throws:

IOException