org.cloudgraph.hbase.key

Class CompositeRowKeyFactory

java.lang.Object

org.cloudgraph.hbase.key.ByteBufferKeyFactory

org.cloudgraph.hbase.key.CompositeRowKeyFactory

All Implemented Interfaces:

ConfigurableKeyFactory, GraphRowKeyFactory

public class CompositeRowKeyFactory
extends ByteBufferKeyFactory
implements GraphRowKeyFactory

Generates an HBase row key based on the configured CloudGraph Row Key Model for a specific HTable Configuration.

The initial creation and subsequent reconstitution for query retrieval purposes of both row and column keys in CloudGraph™ is efficient, as it leverages byte array level API in both Java and the current underlying SDO 2.1 implementation, PlasmaSDO™. Both composite row and column keys are composed in part of structural metadata, and the lightweight metadata API within PlasmaSDO™ contains byte-array level, cached lookup of all basic metadata elements including logical and physical type and property names.

Since:

0.5

Author:

Scott Cinnamond

Field Summary

Fields inherited from class org.cloudgraph.hbase.key.ByteBufferKeyFactory

buf, bufsize, charset, graph, keySupport, rootType, table

Constructor Summary

Constructors

Constructor and Description
CompositeRowKeyFactory(org.plasma.sdo.PlasmaType rootType, StoreMappingContext mappingContext)
CompositeRowKeyFactory(RowOperation graphRow)

Method Summary

Modifier and Type	Method and Description
byte[]	createRowKeyBytes(commonj.sdo.DataGraph dataGraph)
byte[]	createRowKeyBytes(commonj.sdo.DataObject rootDataObject)
byte[]	createRowKeyBytes(List<KeyValue> values)
byte[]	createRowKeyBytes(commonj.sdo.Type type) Creates a row key using only the given type information.

Methods inherited from class org.cloudgraph.hbase.key.ByteBufferKeyFactory

getBuf, getGraph, getRootType, getTable

Methods inherited from class java.lang.Object

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

Constructor Detail

CompositeRowKeyFactory

public CompositeRowKeyFactory(RowOperation graphRow)

CompositeRowKeyFactory

public CompositeRowKeyFactory(org.plasma.sdo.PlasmaType rootType,
                              StoreMappingContext mappingContext)

Method Detail

createRowKeyBytes

public byte[] createRowKeyBytes(commonj.sdo.Type type)

Creates a row key using only the given type information. The key is therefore composed of only "metadata" fields which are pre-defined.

Specified by:

createRowKeyBytes in interface GraphRowKeyFactory

Parameters:

type - the data object type

Returns:

the row key

createRowKeyBytes

public byte[] createRowKeyBytes(commonj.sdo.DataGraph dataGraph)

Specified by:

createRowKeyBytes in interface GraphRowKeyFactory

createRowKeyBytes

public byte[] createRowKeyBytes(commonj.sdo.DataObject rootDataObject)

Specified by:

createRowKeyBytes in interface GraphRowKeyFactory

createRowKeyBytes

public byte[] createRowKeyBytes(List<KeyValue> values)

Specified by:

createRowKeyBytes in interface GraphRowKeyFactory