org.cloudgraph.hbase.key

Class ByteBufferKeyFactory

java.lang.Object

org.cloudgraph.hbase.key.ByteBufferKeyFactory

All Implemented Interfaces:

ConfigurableKeyFactory

Direct Known Subclasses:

CompositeColumnKeyFactory, CompositeRowKeyExpressionFactory, CompositeRowKeyFactory

public abstract class ByteBufferKeyFactory
extends Object
implements ConfigurableKeyFactory

A configuration driven abstract class which helps subclasses leverage table and data graph specific configuration information, such as the hashing algorithm and field level row and column model settings, as well as java ByteBuffer for composite row and column key creation using byte arrays.

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

See Also:

StoreMapping, TableMapping, DataGraphMapping

Field Summary

Fields

Modifier and Type	Field and Description
protected ByteBuffer	buf
protected int	bufsize
protected Charset	charset
protected DataGraphMapping	graph
protected KeySupport	keySupport
protected org.plasma.sdo.PlasmaType	rootType
protected TableMapping	table

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ByteBufferKeyFactory(org.plasma.sdo.PlasmaType rootType, StoreMappingContext mappingContext) Constructor given pure metadata without any operational state, which looks up table and data graph specific configuration information for the given SDO type.
protected	ByteBufferKeyFactory(RowOperation rowOperation) Constructor for read/write operations where we have already found or are creating the underlying row.

Method Summary

Modifier and Type	Method and Description
ByteBuffer	getBuf()
DataGraphMapping	getGraph()
org.plasma.sdo.PlasmaType	getRootType()
TableMapping	getTable()

Methods inherited from class java.lang.Object

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

Field Detail

bufsize

protected int bufsize

buf

protected ByteBuffer buf

charset

protected Charset charset

keySupport

protected KeySupport keySupport

table

protected TableMapping table

graph

protected DataGraphMapping graph

rootType

protected org.plasma.sdo.PlasmaType rootType

Constructor Detail

ByteBufferKeyFactory

protected ByteBufferKeyFactory(RowOperation rowOperation)

Constructor for read/write operations where we have already found or are creating the underlying row. Not for query operations where we have nothing but metadata.

Parameters:

rowOperation -

ByteBufferKeyFactory

protected ByteBufferKeyFactory(org.plasma.sdo.PlasmaType rootType,
                               StoreMappingContext mappingContext)

Constructor given pure metadata without any operational state, which looks up table and data graph specific configuration information for the given SDO type.

Parameters:

rootType - the SDO type

Method Detail

getTable

public TableMapping getTable()

Specified by:

getTable in interface ConfigurableKeyFactory

getGraph

public DataGraphMapping getGraph()

Specified by:

getGraph in interface ConfigurableKeyFactory

getBuf

public ByteBuffer getBuf()

getRootType

public org.plasma.sdo.PlasmaType getRootType()

Specified by:

getRootType in interface ConfigurableKeyFactory