Package org.eclipse.rdf4j.query.impl

Class AbstractOperation

java.lang.Object

org.eclipse.rdf4j.query.impl.AbstractOperation

All Implemented Interfaces:

Operation

Direct Known Subclasses:

AbstractQuery, AbstractUpdate

public abstract class AbstractOperation
extends Object
implements Operation

Abstract super class of all operation types.

Author:

Jeen Broekstra

Field Summary

Fields

Modifier and Type	Field	Description
protected final MapBindingSet	bindings
protected Dataset	dataset
protected boolean	includeInferred

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractOperation()	Creates a new operation object.

Method Summary

Modifier and Type	Method	Description
void	clearBindings()	Removes all previously set bindings.
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.
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.

Methods inherited from class java.lang.Object

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

Field Details

bindings

protected final MapBindingSet bindings

dataset

protected Dataset dataset

includeInferred

protected boolean includeInferred

Constructor Details

AbstractOperation

protected AbstractOperation()

Creates a new operation object.

Method Details

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

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

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

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

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

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

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

Parameters:

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

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

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

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

Returns:

The maximum operation execution time, measured in seconds.

See Also:

• Operation.setMaxExecutionTime(int)