ParsedGraphQuery.java
/*******************************************************************************
* Copyright (c) 2015 Eclipse RDF4J contributors, Aduna, and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Distribution License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*******************************************************************************/
package org.eclipse.rdf4j.query.parser;
import java.util.Collections;
import java.util.Map;
import org.eclipse.rdf4j.query.algebra.TupleExpr;
/**
* A query forumalated in the OpenRDF query algebra that produces an RDF graph (a set of statements) as its result.
*
* @author Arjohn Kampman
*/
public class ParsedGraphQuery extends ParsedQuery {
/*-----------*
* Variables *
*-----------*/
private Map<String, String> queryNamespaces;
/*--------------*
* Constructors *
*--------------*/
/**
* Creates a new graph query. To complete this query, a tuple expression needs to be supplied to it using
* {@link #setTupleExpr(TupleExpr)}.
*/
public ParsedGraphQuery() {
super();
}
/**
* Creates a new graph query. To complete this query, a tuple expression needs to be supplied to it using
* {@link #setTupleExpr(TupleExpr)}.
*
* @param namespaces A mapping of namespace prefixes to namespace names representing the namespaces that are used in
* the query.
*/
public ParsedGraphQuery(Map<String, String> namespaces) {
super();
queryNamespaces = namespaces;
}
/**
* Creates a new graph query for the supplied tuple expression.
*
* @param tupleExpr A tuple expression representing the query, formulated in Sail Query Model objects.
*/
public ParsedGraphQuery(TupleExpr tupleExpr) {
super(tupleExpr);
}
/**
* Creates a new graph query for the supplied tuple expression.
*
* @param tupleExpr A tuple expression representing the query, formulated in Sail Query Model objects.
*/
public ParsedGraphQuery(String sourceString, TupleExpr tupleExpr) {
super(sourceString, tupleExpr);
}
/**
* Creates a new graph query.
*
* @param tupleExpr A tuple expression representing the query, formulated in Sail Query Model objects.
* @param namespaces A mapping of namespace prefixes to namespace names representing the namespaces that are used in
* the query.
*/
public ParsedGraphQuery(TupleExpr tupleExpr, Map<String, String> namespaces) {
this(tupleExpr);
queryNamespaces = namespaces;
}
/**
* Creates a new graph query.
*
* @param tupleExpr A tuple expression representing the query, formulated in Sail Query Model objects.
* @param namespaces A mapping of namespace prefixes to namespace names representing the namespaces that are used in
* the query.
*/
public ParsedGraphQuery(String sourceString, TupleExpr tupleExpr, Map<String, String> namespaces) {
this(sourceString, tupleExpr);
queryNamespaces = namespaces;
}
/*---------*
* Methods *
*---------*/
public Map<String, String> getQueryNamespaces() {
if (queryNamespaces != null) {
return queryNamespaces;
} else {
return Collections.emptyMap();
}
}
}