Class HeFQUINEngineImpl

java.lang.Object

se.liu.ida.hefquin.engine.HeFQUINEngineImpl

All Implemented Interfaces:

HeFQUINEngine

public class HeFQUINEngineImpl
extends Object
implements HeFQUINEngine

Field Summary

Fields

Modifier and Type	Field	Description
protected final FederationAccessManager	fedAccessMgr
protected final QueryProcessor	qProc

Constructor Summary

Constructors

Constructor	Description
HeFQUINEngineImpl(FederationAccessManager fedAccessMgr, QueryProcessor qProc)

Method Summary

Modifier and Type	Method	Description
protected void	executeNonSelectQuery(org.apache.jena.query.QueryExecution qe, org.apache.jena.sparql.resultset.ResultsFormat outputFormat, PrintStream output)
Pair<QueryProcStats,List<Exception>>	executeQuery(org.apache.jena.query.Query query, org.apache.jena.sparql.resultset.ResultsFormat outputFormat, PrintStream output)	Executes the given query, prints the result to the given output (in the given format), and returns a statistics collected during the query execution process, together with a list of exception that were caught during query execution (if any).
protected void	executeSelectQuery(org.apache.jena.query.QueryExecution qe, org.apache.jena.sparql.resultset.ResultsFormat outputFormat, PrintStream output)
FederationAccessStats	getFederationAccessStats()
void	integrateIntoJena()	Call this one after the engine has been created.
void	shutdown()	Shuts down the relevant components used by this engine, such as the federation access manager and the query processor component.

Methods inherited from class java.lang.Object

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

Methods inherited from interface se.liu.ida.hefquin.engine.HeFQUINEngine

executeQuery, executeQuery, executeQuery

Field Details

fedAccessMgr

protected final FederationAccessManager fedAccessMgr

qProc

protected final QueryProcessor qProc

Constructor Details

HeFQUINEngineImpl

public HeFQUINEngineImpl(FederationAccessManager fedAccessMgr,
 QueryProcessor qProc)

Method Details

integrateIntoJena

public void integrateIntoJena()

Description copied from interface: HeFQUINEngine

Call this one after the engine has been created.

Specified by:

integrateIntoJena in interface HeFQUINEngine

getFederationAccessStats

public FederationAccessStats getFederationAccessStats()

Specified by:

getFederationAccessStats in interface HeFQUINEngine

executeQuery

public Pair<QueryProcStats,List<Exception>> executeQuery(org.apache.jena.query.Query query,
 org.apache.jena.sparql.resultset.ResultsFormat outputFormat,
 PrintStream output)
                                                  throws UnsupportedQueryException,
IllegalQueryException

Description copied from interface: HeFQUINEngine

Executes the given query, prints the result to the given output (in the given format), and returns a statistics collected during the query execution process, together with a list of exception that were caught during query execution (if any). An UnsupportedQueryException is thrown if the given query uses features that are not supported by HeFQUIN; the message of the exception describes the specific limitation and can be passed directly to the user. An IllegalQueryException is thrown if the given query is invalid; the message of the exception describes the issue and can be passed directly to the user.

Specified by:

executeQuery in interface HeFQUINEngine

Throws:

UnsupportedQueryException

IllegalQueryException

executeSelectQuery

protected void executeSelectQuery(org.apache.jena.query.QueryExecution qe,
 org.apache.jena.sparql.resultset.ResultsFormat outputFormat,
 PrintStream output)
                           throws Exception

Throws:

Exception

executeNonSelectQuery

protected void executeNonSelectQuery(org.apache.jena.query.QueryExecution qe,
 org.apache.jena.sparql.resultset.ResultsFormat outputFormat,
 PrintStream output)
                              throws Exception

Throws:

Exception

shutdown

public void shutdown()

Description copied from interface: HeFQUINEngine

Shuts down the relevant components used by this engine, such as the federation access manager and the query processor component.

Specified by:

shutdown in interface HeFQUINEngine