| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.jena.query; |
| |
| import java.io.InputStream; |
| |
| import org.apache.jena.atlas.io.IO; |
| import org.apache.jena.riot.system.IRIResolver ; |
| import org.apache.jena.riot.system.stream.StreamManager; |
| import org.apache.jena.shared.NotFoundException; |
| import org.apache.jena.sparql.lang.ParserARQ ; |
| import org.apache.jena.sparql.lang.SPARQLParser ; |
| import org.apache.jena.sparql.lang.SPARQLParserRegistry ; |
| import org.apache.jena.sparql.syntax.Element ; |
| import org.apache.jena.sparql.syntax.Template ; |
| import org.apache.jena.util.FileManager; |
| |
| public class QueryFactory |
| { |
| /** Create a SPARQL query from the given string. |
| * |
| * @param queryString The query string |
| * @throws QueryException Thrown when a parse error occurs |
| */ |
| |
| static public Query create(String queryString) |
| { |
| return create(queryString, Syntax.defaultQuerySyntax) ; |
| } |
| |
| /** Create a query from the given string with the |
| * |
| * @param queryString The query string |
| * @param syntax {@link Syntax} |
| * @throws QueryException Thrown when a parse error occurs |
| */ |
| |
| static public Query create(String queryString, Syntax syntax) |
| { |
| return create(queryString, null, syntax) ; |
| } |
| |
| /** Create a query from the given string by calling the parser. |
| * |
| * @param queryString The query string |
| * @param baseURI Base URI |
| * @throws QueryException Thrown when a parse error occurs |
| */ |
| |
| static public Query create(String queryString, String baseURI) |
| { |
| Query query = new Query() ; |
| return parse(query, queryString, baseURI, Syntax.defaultQuerySyntax) ; |
| } |
| |
| /** Create a query from the given string by calling the parser. |
| * |
| * @param queryString The query string |
| * @param baseURI Base URI |
| * @param syntax {@link Syntax} |
| * @throws QueryException Thrown when a parse error occurs |
| */ |
| |
| static public Query create(String queryString, String baseURI, Syntax syntax) |
| { |
| Query query = new Query() ; |
| return parse(query, queryString, baseURI, syntax) ; |
| } |
| |
| /** |
| * Make a query - no parsing done |
| */ |
| static public Query create() { return new Query() ; } |
| |
| |
| /** |
| * Make a query - no parsing done - old name: {@link #create()} preferred. |
| */ |
| static public Query make() { return create() ; } |
| |
| /** |
| * Make a query from another one by deep copy (a clone). |
| * The returned query will be .equals to the original. |
| * The returned query can be mutated without changing the |
| * original (at which point it will stop being .equals) |
| * |
| * @param originalQuery The query to clone. |
| * |
| */ |
| |
| static public Query create(Query originalQuery) |
| { |
| return originalQuery.cloneQuery() ; |
| } |
| |
| /** Parse a query from the given string by calling the parser. |
| * |
| * @param query Existing, uninitialized query |
| * @param queryString The query string |
| * @param baseURI URI for relative URI expansion |
| * @param syntaxURI URI for the syntax |
| * @throws QueryException Thrown when a parse error occurs |
| */ |
| |
| static public Query parse(Query query, String queryString, String baseURI, Syntax syntaxURI) |
| { |
| if ( syntaxURI == null ) |
| syntaxURI = query.getSyntax() ; |
| else |
| query.setSyntax(syntaxURI) ; |
| |
| SPARQLParser parser = SPARQLParser.createParser(syntaxURI) ; |
| |
| if ( parser == null ) |
| throw new UnsupportedOperationException("Unrecognized syntax for parsing: "+syntaxURI) ; |
| |
| if ( query.getResolver() == null ) |
| { |
| IRIResolver resolver = null ; |
| try { |
| if ( baseURI != null ) { |
| // Sort out the baseURI - if that fails, dump in a dummy one and continue. |
| resolver = IRIResolver.create(baseURI) ; |
| } |
| else { |
| resolver = IRIResolver.create() ; |
| } |
| } |
| catch (Exception ex) {} |
| if ( resolver == null ) |
| resolver = IRIResolver.create("http://localhost/query/defaultBase#") ; |
| query.setResolver(resolver) ; |
| |
| } |
| return parser.parse(query, queryString) ; |
| } |
| |
| static boolean knownParserSyntax(Syntax syntaxURI) |
| { |
| return SPARQLParserRegistry.get().containsFactory(syntaxURI) ; |
| } |
| |
| |
| /** |
| * Read a SPARQL query from a file. |
| * |
| * @param url |
| * URL (file: or http: or anything a FileManager can handle) |
| * @return A new query object |
| */ |
| static public Query read(String url) |
| { |
| return read(url, (StreamManager)null, null, null) ; |
| } |
| |
| /** Read a SPARQL query from a file. |
| * |
| * @param url URL (file: or http: or anything a FileManager can handle) |
| * @param baseURI BaseURI for the query |
| * @return A new query object |
| */ |
| static public Query read(String url, String baseURI) |
| { |
| return read(url, (StreamManager)null, baseURI, null) ; |
| } |
| |
| /** Read a query from a file. |
| * |
| * @param url URL (file: or http: or anything a FileManager can handle) |
| * @param langURI Query syntax |
| * @return A new query object |
| */ |
| static public Query read(String url, Syntax langURI) |
| { |
| return read(url, (StreamManager)null, null, langURI) ; |
| } |
| |
| /** Read a query from a file. |
| * |
| * @param url URL (file: or http: or anything a FileManager can handle) |
| * @param baseURI BaseURI for the query |
| * @param langURI Query syntax |
| * @return A new query object |
| */ |
| static public Query read(String url, String baseURI, Syntax langURI) |
| { |
| return read(url, (StreamManager)null, baseURI, langURI) ; |
| } |
| |
| /** Read a query from a file. |
| * |
| * @param url URL (file: or http: or anything a FileManager can handle) |
| * @param filemanager Optional filemanager |
| * @param baseURI BaseURI for the query |
| * @param langURI Query syntax |
| * @return A new query object |
| * @deprecated Use {@link #read(String, StreamManager, String, Syntax)} |
| */ |
| @Deprecated |
| static public Query read(String url, FileManager filemanager, String baseURI, Syntax langURI) |
| { |
| if ( filemanager == null ) |
| filemanager = org.apache.jena.util.FileManager.getInternal() ; |
| String qStr = filemanager.readWholeFileAsUTF8(url) ; |
| if ( baseURI == null ) |
| baseURI = url ; |
| if ( langURI == null ) |
| langURI = Syntax.guessFileSyntax(url) ; |
| |
| return create(qStr, baseURI, langURI) ; |
| } |
| |
| @Deprecated |
| static public Query read(String url, StreamManager filemanager, String baseURI, Syntax langURI) |
| { |
| if ( filemanager == null ) |
| filemanager = StreamManager.get() ; |
| |
| InputStream in = filemanager.open(url); |
| if ( in == null ) |
| throw new NotFoundException("Not found: "+url); |
| String qStr = IO.readWholeFileAsUTF8(filemanager.open(url)); |
| if ( baseURI == null ) |
| baseURI = url ; |
| if ( langURI == null ) |
| langURI = Syntax.guessFileSyntax(url) ; |
| |
| return create(qStr, baseURI, langURI) ; |
| } |
| |
| |
| static public Element createElement(String elementString) |
| { |
| return ParserARQ.parseElement(elementString) ; |
| } |
| |
| static public Template createTemplate(String templateString) |
| { |
| return ParserARQ.parseTemplate(templateString) ; |
| } |
| } |