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

Class AbstractScalarValueCallable<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>

Type Parameters:

T - Options type

TCallable - Callable type

All Implemented Interfaces:

Callable<OperationRun>, OperationCallable<T>

Direct Known Subclasses:

LongValueCallable

public abstract class AbstractScalarValueCallable<T extends Options,TCallable extends AbstractQueryCallable<T>>
extends WrapperQueryCallable<T,TCallable>

A callable which counts SELECT results by retrieving the value of a specific column of the first row and then converting that value into an integer

Author:

rvesse

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
protected long	countResults(T options, ResultSet rset) Counts results for queries that return a result set
protected abstract 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.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

AbstractScalarValueCallable

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

Creates a new scalar value callable

Parameters:

runner - Runner

options - Options

callable - Callable to decorate

var - Variable name to take the value from

Method Detail

countResults

protected long countResults(T options,
                ResultSet rset)

Description copied from class: AbstractQueryCallable

Counts results for queries that return a result set

The default implementation either returns OperationRun.UNKNOWN if the options indicate that counting is disabled or iterates over the results to count them.

Overrides:

countResults in class WrapperQueryCallable<T extends Options,TCallable extends AbstractQueryCallable<T>>

Parameters:

options - Options

rset - Result Set

Returns:

Number of results

nodeToLong

protected abstract long nodeToLong(Node n)

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

Parameters:

n - Node

Returns:

Long integer