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:

Serql, Sparql

public abstract class QueryEvaluator
extends ConsoleCommand

Abstract query evaluator command

Author:

Dale Visser, Bart Hanssens

Constructor Summary

Constructors

Constructor and Description
QueryEvaluator(TupleAndGraphQueryEvaluator evaluator) Constructor

Method Summary

Modifier and Type	Method and Description
protected abstract void	addQueryPrefixes(StringBuffer result, Collection<Namespace> namespaces) Add namespace prefixes to query
void	executeQuery(String command, String operation) Execute a SPARQL or SERQL query, defaults to SPARQL
protected abstract boolean	hasQueryPrefixes(String query) Check if query string already contains query prefixes

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

execute, getConsoleIO, getConsoleState, getHelpLong, getHelpShort

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

executeQuery

public void executeQuery(String command,
                         String operation)

Execute a SPARQL or SERQL query, defaults to SPARQL

Parameters:

command - to execute

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