Package org.eclipse.rdf4j.console.command

Class QueryEvaluator

java.lang.Object

org.eclipse.rdf4j.console.command.ConsoleCommand

org.eclipse.rdf4j.console.command.QueryEvaluator

All Implemented Interfaces:

Command, Help

Direct Known Subclasses:

Sparql

public abstract class QueryEvaluator
extends ConsoleCommand

Abstract query evaluator command

Author:

Dale Visser, Bart Hanssens

Field Summary

Fields inherited from class org.eclipse.rdf4j.console.command.ConsoleCommand

LOGGER

Constructor Summary

Constructors

Constructor	Description
QueryEvaluator(TupleAndGraphQueryEvaluator evaluator)	Constructor

Method Summary

Modifier and Type	Method	Description
protected abstract void	addQueryPrefixes(StringBuffer result, Collection<Namespace> namespaces)	Add namespace prefixes to query
void	executeQuery(String command, String operation)	Execute a SPARQL query
protected abstract boolean	hasQueryPrefixes(String query)	Check if query string already contains query prefixes
String[]	usesSettings()	Return the names of the settings used.

Methods inherited from class org.eclipse.rdf4j.console.command.ConsoleCommand

askProceed, execute, getConsoleIO, getConsoleSettings, getConsoleState, getHelpLong, getHelpShort, write, writeError, writeError, writeInfo, writeln, writeUnopenedError

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.console.Help

getName

Constructor Detail

QueryEvaluator

public QueryEvaluator(TupleAndGraphQueryEvaluator evaluator)

Constructor

Parameters:

evaluator -

Method Detail

hasQueryPrefixes

protected abstract boolean hasQueryPrefixes(String query)

Check if query string already contains query prefixes

Parameters:

query - query string

Returns:

true if namespaces are already used

addQueryPrefixes

protected abstract void addQueryPrefixes(StringBuffer result,
                                         Collection<Namespace> namespaces)

Add namespace prefixes to query

Parameters:

result -

namespaces - collection of known namespaces

usesSettings

public String[] usesSettings()

Description copied from interface: Command

Return the names of the settings used.

Specified by:

usesSettings in interface Command

Overrides:

usesSettings in class ConsoleCommand

Returns:

string array of settings

executeQuery

public void executeQuery(String command,
                         String operation)

Execute a SPARQL query

Parameters:

command - to execute

operation - "sparql", "base" or SPARQL query form