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ARQ is a SPARQL 1.1 query engine for Apache Jena
/*
* 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.update;
import static org.apache.jena.query.Syntax.defaultUpdateSyntax ;
import java.io.InputStream ;
import org.apache.jena.atlas.io.IO ;
import org.apache.jena.query.Syntax ;
import org.apache.jena.riot.system.IRIResolver ;
import org.apache.jena.sparql.core.Prologue ;
import org.apache.jena.sparql.lang.UpdateParser ;
import org.apache.jena.sparql.modify.UpdateRequestSink ;
import org.apache.jena.sparql.modify.UpdateSink ;
import org.apache.jena.sparql.modify.UsingList ;
import org.apache.jena.sparql.modify.UsingUpdateSink ;
public class UpdateFactory
{
/** Create an empty UpdateRequest */
public static UpdateRequest create() { return new UpdateRequest() ; }
/** Create an UpdateRequest by parsing from a string.
* See also read operations for parsing contents of a file.
* @param string The update request as a string.
*/
public static UpdateRequest create(String string)
{
return create(string, defaultUpdateSyntax) ;
}
/** Create an UpdateRequest by parsing from a string.
* See also read operations for parsing contents of a file.
* @param string The update request as a string.
* @param syntax The update language syntax
*/
public static UpdateRequest create(String string, Syntax syntax)
{
return create(string, null, syntax) ;
}
/** Create an UpdateRequest by parsing from a string.
* See also read operations for parsing contents of a file.
* @param string The update request as a string.
* @param baseURI The base URI for resolving relative URIs.
*/
public static UpdateRequest create(String string, String baseURI)
{
return create(string, baseURI, defaultUpdateSyntax) ;
}
/** Create an UpdateRequest by parsing from a string.
* See also read operations for parsing contents of a file.
* @param string The update request as a string.
* @param baseURI The base URI for resolving relative URIs.
* @param syntax The update language syntax
*/
public static UpdateRequest create(String string, String baseURI, Syntax syntax)
{
UpdateRequest request = new UpdateRequest() ;
make(request, string, baseURI, syntax) ;
return request ;
}
// Worker.
/** Append update operations to a request */
private static void make(UpdateRequest request, String input, String baseURI, Syntax syntax)
{
UpdateParser parser = setupParser(request, baseURI, syntax) ;
parser.parse(new UpdateRequestSink(request), input) ;
}
/* Parse operations and add to an UpdateRequest */
public static void parse(UpdateRequest request, String updateString)
{
make(request, updateString, null, defaultUpdateSyntax) ;
}
/* Parse operations and add to an UpdateRequest */
public static void parse(UpdateRequest request, String updateString, Syntax syntax)
{
make(request, updateString, null, syntax) ;
}
/* Parse operations and add to an UpdateRequest */
public static void parse(UpdateRequest request, String updateString, String baseURI)
{
make(request, updateString, baseURI, defaultUpdateSyntax) ;
}
/* Parse operations and add to an UpdateRequest */
public static void parse(UpdateRequest request, String updateString, String baseURI, Syntax syntax)
{
make(request, updateString, baseURI, syntax) ;
}
/** Append update operations to a request */
protected static UpdateParser setupParser(Prologue prologue, String baseURI, Syntax syntax)
{
UpdateParser parser = UpdateParser.createParser(syntax) ;
if ( parser == null )
throw new UnsupportedOperationException("Unrecognized syntax for parsing update: "+syntax) ;
if ( prologue.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/update/defaultBase#") ;
prologue.setResolver(resolver) ;
}
return parser ;
}
/** Create an UpdateRequest by reading it from a file */
public static UpdateRequest read(UsingList usingList, String fileName)
{
return read(usingList, fileName, null, defaultUpdateSyntax) ;
}
/** Create an UpdateRequest by reading it from a file */
public static UpdateRequest read(String fileName)
{
return read(fileName, fileName, defaultUpdateSyntax) ;
}
/** Create an UpdateRequest by reading it from a file */
public static UpdateRequest read(String fileName, Syntax syntax)
{
return read(fileName, fileName, syntax) ;
}
/** Create an UpdateRequest by reading it from a file */
public static UpdateRequest read(UsingList usingList, String fileName, Syntax syntax)
{
return read(usingList, fileName, fileName, syntax) ;
}
/** Create an UpdateRequest by reading it from a file */
public static UpdateRequest read(String fileName, String baseURI, Syntax syntax)
{
return read(null, fileName, baseURI, syntax);
}
/** Create an UpdateRequest by reading it from a file */
public static UpdateRequest read(UsingList usingList, String fileName, String baseURI, Syntax syntax)
{
InputStream in = null ;
try {
if ( fileName.equals("-") )
in = System.in ;
else
{
in = IO.openFile(fileName) ;
if ( in == null )
throw new UpdateException("File could not be opened: "+fileName) ;
}
return read(usingList, in, baseURI, syntax) ;
} finally {
if ( in != null && ! fileName.equals("-") )
IO.close(in) ;
}
}
/** Create an UpdateRequest by parsing from an InputStream.
* See also read operations for parsing contents of a file.
* @param input The source of the update request (must be UTF-8).
*/
public static UpdateRequest read(InputStream input)
{
return read(input, defaultUpdateSyntax) ;
}
/** Create an UpdateRequest by parsing from an InputStream.
* See also read operations for parsing contents of a file.
* @param usingList The list of externally defined USING statements
* @param input The source of the update request (must be UTF-8).
*/
public static UpdateRequest read(UsingList usingList, InputStream input)
{
return read(usingList, input, defaultUpdateSyntax) ;
}
/** Create an UpdateRequest by parsing from an InputStream.
* See also read operations for parsing contents of a file.
* @param input The source of the update request (must be UTF-8).
* @param syntax The update language syntax
*/
public static UpdateRequest read(InputStream input, Syntax syntax)
{
return read(input, null, syntax) ;
}
/** Create an UpdateRequest by parsing from an InputStream.
* See also read operations for parsing contents of a file.
* @param usingList The list of externally defined USING statements
* @param input The source of the update request (must be UTF-8).
* @param syntax The update language syntax
*/
public static UpdateRequest read(UsingList usingList, InputStream input, Syntax syntax)
{
return read(usingList, input, null, syntax) ;
}
/** Create an UpdateRequest by parsing from an InputStream.
* See also read operations for parsing contents of a file.
* @param input The source of the update request (must be UTF-8).
* @param baseURI The base URI for resolving relative URIs.
*/
public static UpdateRequest read(InputStream input, String baseURI)
{
return read(input, baseURI, defaultUpdateSyntax) ;
}
/** Create an UpdateRequest by parsing from an InputStream.
* See also read operations for parsing contents of a file.
* @param usingList The list of externally defined USING statements
* @param input The source of the update request (must be UTF-8).
* @param baseURI The base URI for resolving relative URIs.
*/
public static UpdateRequest read(UsingList usingList, InputStream input, String baseURI)
{
return read(usingList, input, baseURI, defaultUpdateSyntax) ;
}
/** Create an UpdateRequest by parsing from an InputStream.
* See also read operations for parsing contents of a file.
* @param input The source of the update request (must be UTF-8).
* @param baseURI The base URI for resolving relative URIs.
* @param syntax The update language syntax
*/
public static UpdateRequest read(InputStream input, String baseURI, Syntax syntax)
{
return read(null, input, baseURI, syntax);
}
/** Create an UpdateRequest by parsing from an InputStream.
* See also read operations for parsing contents of a file.
* @param usingList The list of externally defined USING statements
* @param input The source of the update request (must be UTF-8).
* @param baseURI The base URI for resolving relative URIs.
* @param syntax The update language syntax
*/
public static UpdateRequest read(UsingList usingList, InputStream input, String baseURI, Syntax syntax)
{
UpdateRequest request = new UpdateRequest() ;
make(request, usingList, input, baseURI, syntax) ;
return request ;
}
/** Append update operations to a request */
private static void make(UpdateRequest request, UsingList usingList, InputStream input, String baseURI, Syntax syntax)
{
UpdateParser parser = setupParser(request, baseURI, syntax) ;
UpdateSink sink = new UsingUpdateSink(new UpdateRequestSink(request), usingList) ;
try
{
parser.parse(sink, input) ;
}
finally
{
sink.close() ;
}
}
}