org.openanzo.glitter
Interface EngineConfig

All Known Implementing Classes:

BasicGraphEngineConfig, ContainerEngineConfig, CoreEngineConfig, DefaultEngineConfig, LdapEngineConfig, RdbEngineConfig, ServerEngineConfig

public interface EngineConfig

Defines configuration options available to direct the behavior of a Glitter Engine

Author:

lee

Method Summary

boolean	allowNaryUnion()
java.lang.Class<? extends RDFDataset<?>>	getDatasetClass()
java.util.Map<java.net.URI,java.lang.Class<? extends FunctionalPredicate>>	getFunctionalPredicates()
java.lang.Class<? extends QueryExecutionPlan>	getQueryExecutionPlan()
java.lang.Iterable<QueryValidator>	getQueryValidators()
SolutionGeneratorFactory	getSolutionGeneratorFactory()
java.lang.Iterable<TreeRewriter>	getTreeRewriters()
boolean	includeInferredTriples()
boolean	substituteFixedBindings() In many cases, an intermediate result set contains solutions that all bind a given variable to the same value.

Method Detail

getSolutionGeneratorFactory

SolutionGeneratorFactory getSolutionGeneratorFactory()

Returns:

A SolutionGeneratorFactory that can produce SolutionGenerators for the Glitter engine.

getDatasetClass

java.lang.Class<? extends RDFDataset<?>> getDatasetClass()

Returns:

The RDFDataset subclass to use for identifying and retrieving data graphs to query against.

getQueryExecutionPlan

java.lang.Class<? extends QueryExecutionPlan> getQueryExecutionPlan()

Returns:

The QueryExecutionPlan class to use for putting together a plan of access for executing the query.

getTreeRewriters

java.lang.Iterable<TreeRewriter> getTreeRewriters()

Returns:

An enumeration of TreeRewriters that will be applied sequentially to transform the SPARQL query tree before query execution.

getQueryValidators

java.lang.Iterable<QueryValidator> getQueryValidators()

Returns:

An enumeration of QueryValidators that will be invoked sequentially to determine if the engine will execute the given query.

allowNaryUnion

boolean allowNaryUnion()

Returns:

Whether the normal form rewriter should combine nested binary UNIONs into a single N-ary UNION operator.

substituteFixedBindings

boolean substituteFixedBindings()

In many cases, an intermediate result set contains solutions that all bind a given variable to the same value. In most cases, this value can be safely substituted in for the variable anywhere else in the query that the variable appears.

Returns:

Whether the engine should aggressively substitute for variables with fixed values.

getFunctionalPredicates

java.util.Map<java.net.URI,java.lang.Class<? extends FunctionalPredicate>> getFunctionalPredicates()

Returns:

A map associating predicate URIs with FunctionalPredicates that implement special semantics for that URI.

includeInferredTriples

boolean includeInferredTriples()

Returns:

whether the underlying solution generator should include inferred triples when providing results