org.cloudgraph.hbase.key

Class CompositeRowKeyExpressionFactory

java.lang.Object

org.cloudgraph.hbase.key.ByteBufferKeyFactory

org.cloudgraph.hbase.key.CompositeRowKeyExpressionFactory

All Implemented Interfaces:

ConfigurableKeyFactory, GraphRowKeyExpressionFactory

public class CompositeRowKeyExpressionFactory
extends ByteBufferKeyFactory
implements GraphRowKeyExpressionFactory

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

The initial creation and subsequent re-constitution 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
CompositeRowKeyExpressionFactory(org.plasma.sdo.PlasmaType rootType, StoreMappingContext mappingContext)
CompositeRowKeyExpressionFactory(RowOperation graphRow)

Method Summary

Modifier and Type	Method and Description
String	createRowKeyExpr(List<KeyValue> values)
byte[]	createRowKeyExprBytes(List<KeyValue> values)
boolean	hasUserDefinedRowKeyToken(commonj.sdo.Type type, String path) Returns true if the data graph configured for the given type has a user defined token which maps to the given property path.

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

CompositeRowKeyExpressionFactory

public CompositeRowKeyExpressionFactory(RowOperation graphRow)

CompositeRowKeyExpressionFactory

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

Method Detail

createRowKeyExpr

public String createRowKeyExpr(List<KeyValue> values)

Specified by:

createRowKeyExpr in interface GraphRowKeyExpressionFactory

createRowKeyExprBytes

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

Specified by:

createRowKeyExprBytes in interface GraphRowKeyExpressionFactory

hasUserDefinedRowKeyToken

public boolean hasUserDefinedRowKeyToken(commonj.sdo.Type type,
                                         String path)

Returns true if the data graph configured for the given type has a user defined token which maps to the given property path.

Specified by:

hasUserDefinedRowKeyToken in interface GraphRowKeyExpressionFactory

Parameters:

type - the SDO type

path - the property path

Returns:

true if the data graph configured for the given type has a user defined token which maps to the given property path.