org.calrissian.accumulorecipes.graphstore.support

Class EdgeGroupingIterator

java.lang.Object

org.calrissian.accumulorecipes.graphstore.support.EdgeGroupingIterator

All Implemented Interfaces:

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

public class EdgeGroupingIterator
extends Object
implements org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value>

This will group edges together with their respective properties so that they can be easily marshalled back into Entity objects to be filtered.

Constructor Summary

Constructors

Constructor and Description
EdgeGroupingIterator()

Method Summary

Methods

Modifier and Type	Method and Description
static SortedMap<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value>	decodeRow(org.apache.accumulo.core.data.Key rowKey, org.apache.accumulo.core.data.Value rowValue)
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)
static org.apache.accumulo.core.data.Value	encodeRow(List<org.apache.accumulo.core.data.Key> keys, List<org.apache.accumulo.core.data.Value> values)
protected boolean	filter(org.apache.hadoop.io.Text currentRow, List<org.apache.accumulo.core.data.Key> keys, List<org.apache.accumulo.core.data.Value> values)
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 java.lang.Object

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

Constructor Detail

EdgeGroupingIterator

public EdgeGroupingIterator()

Method Detail

decodeRow

public static SortedMap<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value> decodeRow(org.apache.accumulo.core.data.Key rowKey,
                                                                                         org.apache.accumulo.core.data.Value rowValue)
                                                                                                  throws IOException

Throws:

IOException

encodeRow

public static org.apache.accumulo.core.data.Value encodeRow(List<org.apache.accumulo.core.data.Key> keys,
                                            List<org.apache.accumulo.core.data.Value> values)
                                                     throws IOException

Throws:

IOException

filter

protected boolean filter(org.apache.hadoop.io.Text currentRow,
             List<org.apache.accumulo.core.data.Key> keys,
             List<org.apache.accumulo.core.data.Value> values)

Parameters:

currentRow - All keys have this in their row portion (do not modify!).

keys - One key for each key in the row, ordered as they are given by the source iterator (do not modify!).

values - One value for each key in keys, ordered to correspond to the ordering in keys (do not modify!).

Returns:

true if we want to keep the row, false if we want to skip it

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>

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>

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>

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>

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>

Throws:

IOException

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>

Throws:

IOException

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>

Throws:

IOException