Package cz.cvut.kbss.jopa.query.sparql.loader

Class SparqlQueryResultLoadingOptimizer

java.lang.Object

cz.cvut.kbss.jopa.query.sparql.loader.QueryResultLoadingOptimizer<TokenStreamSparqlQueryHolder>

cz.cvut.kbss.jopa.query.sparql.loader.SparqlQueryResultLoadingOptimizer

public class SparqlQueryResultLoadingOptimizer
extends QueryResultLoadingOptimizer<TokenStreamSparqlQueryHolder>

Allows optimizing queries that load entity instances.

Field Summary

Fields inherited from class cz.cvut.kbss.jopa.query.sparql.loader.QueryResultLoadingOptimizer

optimizationEnabled, queryHolder

Constructor Summary

Constructors

Constructor	Description
SparqlQueryResultLoadingOptimizer(TokenStreamSparqlQueryHolder queryHolder, UnitOfWork uow)

Method Summary

Modifier and Type	Method	Description
<T> QueryResultLoader<T>	getQueryResultLoader(Class<T> resultClass, Descriptor descriptor)	Gets loader of query results for the specified query.
void	optimizeQueryAssembly(Class<?> resultClass, Descriptor descriptor)	Modifies the query assembly for optimized entity loading, if possible.

Methods inherited from class cz.cvut.kbss.jopa.query.sparql.loader.QueryResultLoadingOptimizer

disableOptimization, enableOptimization

Methods inherited from class java.lang.Object

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

Constructor Details

SparqlQueryResultLoadingOptimizer

public SparqlQueryResultLoadingOptimizer(TokenStreamSparqlQueryHolder queryHolder,
 UnitOfWork uow)

Method Details

optimizeQueryAssembly

public void optimizeQueryAssembly(Class<?> resultClass,
 Descriptor descriptor)

Description copied from class: QueryResultLoadingOptimizer

Modifies the query assembly for optimized entity loading, if possible.

Specified by:

optimizeQueryAssembly in class QueryResultLoadingOptimizer<TokenStreamSparqlQueryHolder>

Parameters:

resultClass - Query result class

descriptor - Descriptor specified for query result loading

getQueryResultLoader

public <T> QueryResultLoader<T> getQueryResultLoader(Class<T> resultClass,
 Descriptor descriptor)

Gets loader of query results for the specified query.

If possible, a version supporting optimized entity loading is returned.

Specified by:

getQueryResultLoader in class QueryResultLoadingOptimizer<TokenStreamSparqlQueryHolder>

Type Parameters:

T - Result type

Parameters:

resultClass - Result class

descriptor - Descriptor specified for results

Returns:

Query result loader