net.sf.sparql.benchmarking.operations.query.callables

Class LongValueCallable<T extends Options,TCallable extends AbstractQueryCallable<T>>

java.lang.Object

net.sf.sparql.benchmarking.operations.AbstractOperationCallable<T>

net.sf.sparql.benchmarking.operations.query.callables.AbstractQueryCallable<T>

net.sf.sparql.benchmarking.operations.query.callables.WrapperQueryCallable<T,TCallable>

net.sf.sparql.benchmarking.operations.query.callables.AbstractScalarValueCallable<T,TCallable>

net.sf.sparql.benchmarking.operations.query.callables.LongValueCallable<T,TCallable>

Type Parameters:

T - Options type

TCallable - Callable type

All Implemented Interfaces:

Callable<OperationRun>, OperationCallable<T>

public class LongValueCallable<T extends Options,TCallable extends AbstractQueryCallable<T>>
extends AbstractScalarValueCallable<T,TCallable>

A callable for getting the value of a specific variable in the first row of a result set as a long

Usually used in conjunction with custom operations like DatasetSizeOperation which calculate some aggregate on the data using a SELECT query and want to return that aggregate value as the number of results rather than the number of results rows as the basic RemoteQueryCallable would return.

Author:

rvesse

Constructor Summary

Constructors

Constructor and Description
LongValueCallable(Runner<T> runner, T options, TCallable callable, String var) Creates a new callable

Method Summary

Methods

Modifier and Type	Method and Description
protected long	nodeToLong(Node n) Method that should be implemented by derived classes to convert the node into an integer

Methods inherited from class net.sf.sparql.benchmarking.operations.query.callables.AbstractScalarValueCallable

countResults

Methods inherited from class net.sf.sparql.benchmarking.operations.query.callables.WrapperQueryCallable

call, countResults, countResults, createQueryExecution, customizeRequest, getQuery

Methods inherited from class net.sf.sparql.benchmarking.operations.AbstractOperationCallable

cancel, getOptions, getRunner, isCancelled

Methods inherited from class java.lang.Object

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

Constructor Detail

LongValueCallable

public LongValueCallable(Runner<T> runner,
                 T options,
                 TCallable callable,
                 String var)

Creates a new callable

Parameters:

var - Variable whose value is to be retrieved

runner - Runner

options - Options

callable - Callable to decorate

Method Detail

nodeToLong

protected long nodeToLong(Node n)

Description copied from class: AbstractScalarValueCallable

Method that should be implemented by derived classes to convert the node into an integer

Specified by:

nodeToLong in class AbstractScalarValueCallable<T extends Options,TCallable extends AbstractQueryCallable<T>>

Parameters:

n - Node

Returns:

Long integer