Package org.eclipse.rdf4j.federated.structures

Class FedXGraphQuery

java.lang.Object

org.eclipse.rdf4j.query.impl.AbstractOperation

org.eclipse.rdf4j.query.impl.AbstractQuery

org.eclipse.rdf4j.query.impl.AbstractParserQuery

org.eclipse.rdf4j.repository.sail.SailQuery

org.eclipse.rdf4j.repository.sail.SailGraphQuery

org.eclipse.rdf4j.federated.structures.FedXGraphQuery

All Implemented Interfaces:

GraphQuery, Operation, Query

public class FedXGraphQuery
extends SailGraphQuery

Abstraction of a SailGraphQuery which takes care for tracking the FedXRepositoryConnection.BINDING_ORIGINAL_MAX_EXECUTION_TIME during evaluation. All methods are delegated to the actual SailGraphQuery.

Author:

Andreas Schwarte

Nested Class Summary

Nested classes/interfaces inherited from interface org.eclipse.rdf4j.query.Query

Query.QueryType

Field Summary

Fields

Modifier and Type	Field	Description
protected final SailGraphQuery	delegate

Fields inherited from class org.eclipse.rdf4j.query.impl.AbstractParserQuery

DEFAULT_EXPLANATION_EXECUTION_TIMEOUT

Fields inherited from class org.eclipse.rdf4j.query.impl.AbstractOperation

bindings, dataset, includeInferred

Constructor Summary

Constructors

Constructor	Description
FedXGraphQuery(SailGraphQuery delegate)

Method Summary

Modifier and Type	Method	Description
void	clearBindings()	Removes all previously set bindings.
boolean	equals(Object obj)
GraphQueryResult	evaluate()
void	evaluate(RDFHandler handler)
Dataset	getActiveDataset()	Gets the "active" dataset for this query.
BindingSet	getBindings()	Retrieves the bindings that have been set on this operation.
Dataset	getDataset()	Gets the dataset that has been set using Operation.setDataset(Dataset), if any.
boolean	getIncludeInferred()	Returns whether or not this operation will return inferred statements (if any are present in the repository).
int	getMaxExecutionTime()	Returns the maximum operation execution time.
int	getMaxQueryTime()	Returns the maximum query evaluation time.
ParsedGraphQuery	getParsedQuery()
int	hashCode()
void	removeBinding(String name)	Removes a previously set binding on the supplied variable.
void	setBinding(String name, Value value)	Binds the specified variable to the supplied value.
void	setDataset(Dataset dataset)	Specifies the dataset against which to execute an operation, overriding any dataset that is specified in the operation itself.
void	setIncludeInferred(boolean includeInferred)	Determine whether evaluation results of this operation should include inferred statements (if any inferred statements are present in the repository).
void	setMaxExecutionTime(int maxExecutionTimeSeconds)	Specifies the maximum time that an operation is allowed to run.
void	setMaxQueryTime(int maxQueryTime)	Specifies the maximum time that a query is allowed to run.
String	toString()

Methods inherited from class org.eclipse.rdf4j.repository.sail.SailQuery

explain, getConnection

Methods inherited from class org.eclipse.rdf4j.query.impl.AbstractParserQuery

enforceMaxQueryTime

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.eclipse.rdf4j.query.Query

explain

Field Details

delegate

protected final SailGraphQuery delegate

Constructor Details

FedXGraphQuery

public FedXGraphQuery(SailGraphQuery delegate)

Method Details

evaluate

public GraphQueryResult evaluate()
                          throws QueryEvaluationException

Specified by:

evaluate in interface GraphQuery

Overrides:

evaluate in class SailGraphQuery

Throws:

QueryEvaluationException

evaluate

public void evaluate(RDFHandler handler)
              throws QueryEvaluationException,
RDFHandlerException

Specified by:

evaluate in interface GraphQuery

Overrides:

evaluate in class SailGraphQuery

Throws:

QueryEvaluationException

RDFHandlerException

setMaxQueryTime

public void setMaxQueryTime(int maxQueryTime)

Description copied from interface: Query

Specifies the maximum time that a query is allowed to run. The query will be interrupted when it exceeds the time limit. Any consecutive requests to fetch query results will result in QueryInterruptedExceptions.

Specified by:

setMaxQueryTime in interface Query

Overrides:

setMaxQueryTime in class AbstractQuery

Parameters:

maxQueryTime - The maximum query time, measured in seconds. A negative or zero value indicates an unlimited query time (which is the default).

getMaxQueryTime

public int getMaxQueryTime()

Description copied from interface: Query

Returns the maximum query evaluation time.

Specified by:

getMaxQueryTime in interface Query

Overrides:

getMaxQueryTime in class AbstractQuery

Returns:

The maximum query evaluation time, measured in seconds.

See Also:

• Query.setMaxQueryTime(int)

setBinding

public void setBinding(String name,
 Value value)

Description copied from interface: Operation

Binds the specified variable to the supplied value. Any value that was previously bound to the specified value will be overwritten.

Specified by:

setBinding in interface Operation

Overrides:

setBinding in class AbstractOperation

Parameters:

name - The name of the variable that should be bound.

value - The (new) value for the specified variable.

removeBinding

public void removeBinding(String name)

Description copied from interface: Operation

Removes a previously set binding on the supplied variable. Calling this method with an unbound variable name has no effect.

Specified by:

removeBinding in interface Operation

Overrides:

removeBinding in class AbstractOperation

Parameters:

name - The name of the variable from which the binding is to be removed.

clearBindings

public void clearBindings()

Description copied from interface: Operation

Removes all previously set bindings.

Specified by:

clearBindings in interface Operation

Overrides:

clearBindings in class AbstractOperation

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractParserQuery

getBindings

public BindingSet getBindings()

Description copied from interface: Operation

Retrieves the bindings that have been set on this operation.

Specified by:

getBindings in interface Operation

Overrides:

getBindings in class AbstractOperation

Returns:

A (possibly empty) set of operation variable bindings.

See Also:

• Operation.setBinding(String, Value)

setDataset

public void setDataset(Dataset dataset)

Description copied from interface: Operation

Specifies the dataset against which to execute an operation, overriding any dataset that is specified in the operation itself.

Specified by:

setDataset in interface Operation

Overrides:

setDataset in class AbstractOperation

getDataset

public Dataset getDataset()

Description copied from interface: Operation

Gets the dataset that has been set using Operation.setDataset(Dataset), if any.

Specified by:

getDataset in interface Operation

Overrides:

getDataset in class AbstractOperation

setIncludeInferred

public void setIncludeInferred(boolean includeInferred)

Description copied from interface: Operation

Determine whether evaluation results of this operation should include inferred statements (if any inferred statements are present in the repository). The default setting is 'true'.

Specified by:

setIncludeInferred in interface Operation

Overrides:

setIncludeInferred in class AbstractOperation

Parameters:

includeInferred - indicates whether inferred statements should be included in the result.

getActiveDataset

public Dataset getActiveDataset()

Description copied from class: AbstractParserQuery

Gets the "active" dataset for this query. The active dataset is either the dataset that has been specified using AbstractOperation.setDataset(Dataset) or the dataset that has been specified in the query, where the former takes precedence over the latter.

Overrides:

getActiveDataset in class AbstractParserQuery

Returns:

The active dataset, or null if there is no dataset.

getParsedQuery

public ParsedGraphQuery getParsedQuery()

Overrides:

getParsedQuery in class SailGraphQuery

getIncludeInferred

public boolean getIncludeInferred()

Description copied from interface: Operation

Returns whether or not this operation will return inferred statements (if any are present in the repository).

Specified by:

getIncludeInferred in interface Operation

Overrides:

getIncludeInferred in class AbstractOperation

Returns:

true if inferred statements will be returned, false otherwise.

setMaxExecutionTime

public void setMaxExecutionTime(int maxExecutionTimeSeconds)

Description copied from interface: Operation

Specifies the maximum time that an operation is allowed to run. The operation will be interrupted when it exceeds the time limit. Any consecutive requests to fetch query results will result in QueryInterruptedExceptions or UpdateExecutionExceptions (depending on whether the operation is a query or an update).

Specified by:

setMaxExecutionTime in interface Operation

Overrides:

setMaxExecutionTime in class AbstractOperation

Parameters:

maxExecutionTimeSeconds - The maximum query time, measured in seconds. A negative or zero value indicates an unlimited execution time (which is the default).

getMaxExecutionTime

public int getMaxExecutionTime()

Description copied from interface: Operation

Returns the maximum operation execution time.

Specified by:

getMaxExecutionTime in interface Operation

Overrides:

getMaxExecutionTime in class AbstractOperation

Returns:

The maximum operation execution time, measured in seconds.

See Also:

• Operation.setMaxExecutionTime(int)

toString

public String toString()

Overrides:

toString in class AbstractParserQuery

equals

public boolean equals(Object obj)

Overrides:

equals in class AbstractParserQuery