org.cloudgraph.hbase.filter

Class GraphFetchColumnFilterAssembler

java.lang.Object

org.cloudgraph.hbase.filter.FilterListAssembler

org.cloudgraph.hbase.filter.GraphFetchColumnFilterAssembler

All Implemented Interfaces:

Assembler, HBaseFilterAssembler

public class GraphFetchColumnFilterAssembler
extends FilterListAssembler
implements HBaseFilterAssembler

Creates an HBase column filter set based on the given criteria which leverages the HBase MultipleColumnPrefixFilter to return only columns which make up the selected data graph. The advantage of this strategy is that a complete graph of any complexity may be returned in a single round trip.

Since:

0.5

Author:

Scott Cinnamond

See Also:

GraphColumnKeyFactory, InitialFetchColumnFilterAssembler

Field Summary

Fields inherited from class org.cloudgraph.hbase.filter.FilterListAssembler

params, rootFilter, rootType

Constructor Summary

Constructors

Constructor and Description
GraphFetchColumnFilterAssembler(org.plasma.query.collector.Selection selection, org.plasma.sdo.PlasmaType rootType, StoreMappingContext mappingContext)

Method Summary

Modifier and Type	Method and Description
void	clear()
protected void	log(org.plasma.query.model.Select root)

Methods inherited from class org.cloudgraph.hbase.filter.FilterListAssembler

getFilter, getParams

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.cloudgraph.hbase.filter.HBaseFilterAssembler

getFilter

Constructor Detail

GraphFetchColumnFilterAssembler

public GraphFetchColumnFilterAssembler(org.plasma.query.collector.Selection selection,
                                       org.plasma.sdo.PlasmaType rootType,
                                       StoreMappingContext mappingContext)

Method Detail

clear

public void clear()

Specified by:

clear in interface Assembler

Overrides:

clear in class FilterListAssembler

log

protected void log(org.plasma.query.model.Select root)