org.cloudgraph.hbase.scan

Class FuzzyRowKeyScanAssembler

java.lang.Object

org.cloudgraph.hbase.scan.FuzzyRowKeyScanAssembler

All Implemented Interfaces:

Assembler, HBaseFilterAssembler, FuzzyRowKey, RowKeyScanAssembler

public class FuzzyRowKeyScanAssembler
extends Object
implements RowKeyScanAssembler, FuzzyRowKey, HBaseFilterAssembler

Assembles a composite fuzzy row key bytes / fuzzy info bytes pair where each field within the composite row keys are constructed based a set of query predicates.

Since:

0.5.3

Author:

Scott Cinnamond

See Also:

DataGraphMapping, TableMapping, DataField, MetaField, MetaFieldName

Field Summary

Fields

Modifier and Type	Field and Description
protected int	bufsize
protected byte[]	delimMask
protected int	fieldCount
protected byte	fixedMaskByte
protected DataGraphMapping	graph
protected ByteBuffer	infoBytes
protected ByteBuffer	keyBytes
protected StoreMappingContext	mappingContext
protected org.plasma.sdo.PlasmaType	rootType
protected String	rootUUID
protected ScanLiterals	scanLiterals
protected TableMapping	table
protected byte	variableMaskByte

Constructor Summary

Constructors

Constructor and Description
FuzzyRowKeyScanAssembler(org.plasma.sdo.PlasmaType rootType, StoreMappingContext mappingContext) Constructor
FuzzyRowKeyScanAssembler(org.plasma.sdo.PlasmaType rootType, String rootUUID, StoreMappingContext mappingContext) Constructor which enables the use of data object UUID as a pre-defined row key field.

Method Summary

Modifier and Type	Method and Description
void	assemble() Assemble row key scan information based only on any pre-defined row-key fields such as the data graph root type or URI.
void	assemble(ScanLiterals literals) Assemble row key scan information based on the given scan literals as well as pre-defined row-key fields such as the data graph root type or URI.
void	assemble(org.plasma.query.model.Where where, org.plasma.sdo.PlasmaType contextType) Assemble row key scan information based on one or more given query predicates.
void	clear()
org.apache.hadoop.hbase.filter.Filter	getFilter() Returns the assembled filter, filter list or filter hierarchy root.
byte[]	getFuzzyInfoBytes()
byte[]	getFuzzyKeyBytes()

Methods inherited from class java.lang.Object

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

Field Detail

bufsize

protected int bufsize

keyBytes

protected ByteBuffer keyBytes

infoBytes

protected ByteBuffer infoBytes

rootType

protected org.plasma.sdo.PlasmaType rootType

mappingContext

protected StoreMappingContext mappingContext

graph

protected DataGraphMapping graph

table

protected TableMapping table

scanLiterals

protected ScanLiterals scanLiterals

fieldCount

protected int fieldCount

rootUUID

protected String rootUUID

fixedMaskByte

protected byte fixedMaskByte

variableMaskByte

protected byte variableMaskByte

delimMask

protected byte[] delimMask

Constructor Detail

FuzzyRowKeyScanAssembler

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

Constructor

Parameters:

rootType - the root type

FuzzyRowKeyScanAssembler

public FuzzyRowKeyScanAssembler(org.plasma.sdo.PlasmaType rootType,
                                String rootUUID,
                                StoreMappingContext mappingContext)

Constructor which enables the use of data object UUID as a pre-defined row key field.

Parameters:

rootType - the root type

rootUUID - the root UUID.

Method Detail

assemble

public void assemble()

Assemble row key scan information based only on any pre-defined row-key fields such as the data graph root type or URI.

Specified by:

assemble in interface RowKeyScanAssembler

See Also:

MetaField, MetaFieldName

assemble

public void assemble(ScanLiterals literals)

Assemble row key scan information based on the given scan literals as well as pre-defined row-key fields such as the data graph root type or URI.

Specified by:

assemble in interface RowKeyScanAssembler

Parameters:

literalList - the scan literals

See Also:

MetaField, MetaFieldName

assemble

public void assemble(org.plasma.query.model.Where where,
                     org.plasma.sdo.PlasmaType contextType)

Assemble row key scan information based on one or more given query predicates.

Specified by:

assemble in interface RowKeyScanAssembler

Parameters:

where - the row predicate hierarchy

contextType - the context type which may be the root type or another type linked by one or more relations to the root

getFuzzyKeyBytes

public byte[] getFuzzyKeyBytes()

Specified by:

getFuzzyKeyBytes in interface FuzzyRowKey

getFuzzyInfoBytes

public byte[] getFuzzyInfoBytes()

Specified by:

getFuzzyInfoBytes in interface FuzzyRowKey

clear

public void clear()

Specified by:

clear in interface Assembler

getFilter

public org.apache.hadoop.hbase.filter.Filter getFilter()

Description copied from interface: FuzzyRowKey

Returns the assembled filter, filter list or filter hierarchy root.

Specified by:

getFilter in interface HBaseFilterAssembler

Specified by:

getFilter in interface FuzzyRowKey

Returns:

the assembled filter, filter list or or filter hierarchy root.