org.openanzo.server.repository.graph
Class RdfMap

java.lang.Object
  org.openanzo.server.repository.graph.RdfMap

public class RdfMap
extends java.lang.Object

Maps the Anzo RDF structures to the Anzo relational database schema. This is a hard coded mapping used by the Query Grounding code ('org.openanzo.model.repository.querybuilder') to dynamically determine which tables and columns to query when looking for statements matching a triple pattern. A couple things complicate the RDF to relational data mapping: - There are significant differences in how Anzo data is represented in RDF and how it is stored - Access control limits what statements are visible to the user performing a query This code builds on both the 'sqlscribe' code (SqlQuery class, etc..) and the query groundings code (SubjectGrounding, PredicateGrounding and ObjectGrounding, etc.. classes).

Author:

Joe Betz, Matthew Roy ( mroy@cambridgesemantics.com )

Nested Class Summary

static class	RdfMap.AclHistory Grounding and constraint definitions for Acl queries
static class	RdfMap.NamedGraphs Grounding and constraint definitions for NamedGraph queries
static class	RdfMap.RoleHistory Grounding and constraint definitions for Role/SubRole queries
static class	RdfMap.UserHistory Grounding and constraint definitions for User queries
static class	RdfMap.UserRoleHistory Grounding and constraint definitions for UserRole queries

Field Summary

static java.lang.String	endVar Variable name for hend
static Literal	FALSE Literal value for FALS
static java.lang.String	namedGraphIdVar Variable name for NamedGraphId
static java.lang.String	startVar Variable name for hstart
static java.lang.String	tempGraphsName Alias name for temporary graph table
static Literal	TRUE Literal value for TRUE

Constructor Summary

RdfMap()

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

namedGraphIdVar

public static final java.lang.String namedGraphIdVar

Variable name for NamedGraphId

See Also:

Constant Field Values

startVar

public static final java.lang.String startVar

Variable name for hstart

See Also:

Constant Field Values

endVar

public static final java.lang.String endVar

Variable name for hend

See Also:

Constant Field Values

tempGraphsName

public static final java.lang.String tempGraphsName

Alias name for temporary graph table

See Also:

Constant Field Values

TRUE

public static final Literal TRUE

Literal value for TRUE

FALSE

public static final Literal FALSE

Literal value for FALS

Constructor Detail

RdfMap

public RdfMap()