/*
* 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.sdb;
import org.apache.jena.datatypes.xsd.XSDDatatype ;
import org.apache.jena.query.ARQ ;
import org.apache.jena.sdb.assembler.AssemblerVocab ;
import org.apache.jena.sdb.core.SDBConstants ;
import org.apache.jena.sdb.engine.QueryEngineSDB ;
import org.apache.jena.sdb.modify.UpdateEngineSDB ;
import org.apache.jena.sdb.util.DerbyUtils ;
import org.apache.jena.shared.PrefixMapping ;
import org.apache.jena.shared.impl.PrefixMappingImpl ;
import org.apache.jena.sparql.ARQInternalErrorException ;
import org.apache.jena.sparql.SystemARQ ;
import org.apache.jena.sparql.lib.Metadata ;
import org.apache.jena.sparql.mgt.SystemInfo ;
import org.apache.jena.sparql.util.Context ;
import org.apache.jena.sparql.util.MappingRegistry ;
import org.apache.jena.sparql.util.Symbol ;
import org.apache.jena.system.JenaSystem ;
import org.apache.jena.vocabulary.OWL ;
import org.apache.jena.vocabulary.RDF ;
import org.apache.jena.vocabulary.RDFS ;
public class SDB
{
// Must be first, especially the initLock setup.
private static volatile boolean initialized = false ;
private static Object initLock = new Object() ;
/** IRI for SDB */
public static final String sdbIRI = "http://jena.hpl.hp.com/#sdb" ;
/** SDB namespace */
public final static String namespace = "http://jena.hpl.hp.com/2007/sdb#" ;
public final static String symbolPrefix = "sdb" ;
public final static String symbolSpace = "http://jena.hpl.hp.com/SDB/symbol#" ;
// ----------------------------------
public static final Symbol useQuadRewrite = SDBConstants.allocSymbol("useQuadRewrite") ;
public static final Symbol unionDefaultGraph = SDBConstants.allocSymbol("unionDefaultGraph") ;
/** Control whether GraphSDB streams results to find - must ensure all Jena iterators are closed if this is set true */
public static final Symbol streamGraphAPI = SDBConstants.allocSymbol("streamGraphAPI") ;
/** Control/attempt JDBC streaming - mosty databases allow only one outstanding streaming request */
public static final Symbol jdbcStream = SDBConstants.allocSymbol("jdbcStream") ;
public static final Symbol jdbcFetchSize = SDBConstants.allocSymbol("jdbcFetchSize") ;
// See also SDBConstants.jdbcFetchSizeOff
public static final Symbol annotateGeneratedSQL = SDBConstants.allocSymbol("annotateGeneratedSQL") ;
// ----------------------------------
// Global context is the ARQ context.
public static Context getContext() { return ARQ.getContext() ; }
static {
JenaSystem.init();
}
// /** Used by Jena assemblers for registration */
// public static void whenRequiredByAssembler( AssemblerGroup g )
// {
// AssemblerUtils.init() ; // ARQ
// AssemblerVocab.register(g) ; // SDB
// }
public static void init() {
if ( initialized )
return ;
synchronized(initLock) {
if ( initialized ) {
JenaSystem.logLifecycle("SDB.init - skip") ;
return ;
}
initialized = true ;
JenaSystem.logLifecycle("SDB.init - start") ;
MappingRegistry.addPrefixMapping(SDB.symbolPrefix, SDB.symbolSpace) ;
// Default is 1000 4Kpages.
DerbyUtils.setDerbyPageCacheSize(10000) ;
// Wire in the SDB query engine
QueryEngineSDB.register() ;
// Wire in the SDB update engine
UpdateEngineSDB.register() ;
SDB.getContext().setIfUndef(useQuadRewrite, false) ;
SDB.getContext().setIfUndef(streamGraphAPI, false) ;
SDB.getContext().setIfUndef(jdbcStream, true) ;
//SDB.getContext().setIfUndef(jdbcFetchSize, ???) ;
SDB.getContext().setIfUndef(annotateGeneratedSQL, true) ;
//SDB.getContext().setIfUndef(unionDefaultGraph, false) ;
AssemblerVocab.init();
JenaSystem.logLifecycle("SDB.init - finish") ;
}
}
/** RDF namespace prefix */
private static final String rdfPrefix = RDF.getURI() ;
/** RDFS namespace prefix */
private static final String rdfsPrefix = RDFS.getURI() ;
/** OWL namespace prefix */
private static final String owlPrefix = OWL.getURI() ;
/** XSD namespace prefix */
private static final String xsdPrefix = XSDDatatype.XSD+"#" ;
// /** The namespace of the XML results format */
// private static final String srxPrefix = "http://www.w3.org/2005/sparql-results#" ;
protected static PrefixMapping globalPrefixMap = new PrefixMappingImpl() ;
static {
globalPrefixMap.setNsPrefix("rdf", rdfPrefix) ;
globalPrefixMap.setNsPrefix("rdfs", rdfsPrefix) ;
globalPrefixMap.setNsPrefix("xsd", xsdPrefix) ;
globalPrefixMap.setNsPrefix("owl" , owlPrefix) ;
globalPrefixMap.setNsPrefix("sdb" , namespace) ;
}
public static PrefixMapping getGlobalPrefixMapping() { return globalPrefixMap ; }
public static Symbol allocSymbol(String shortName)
{
if ( shortName.startsWith(ARQ.arqParamNS) )
throw new ARQInternalErrorException("Symbol short name begins with the ARQ namespace name: "+shortName) ;
return Symbol.create(ARQ.arqParamNS+shortName) ;
}
// ----------------------------------
static private String metadataLocation = "org/apache/jena/sdb/sdb-properties.xml" ;
static private Metadata metadata = new Metadata(metadataLocation) ;
/** The root package name for SDB */
public static final String PATH = "org.apache.jena.sdb";
/** The product name */
public static final String NAME = "SDB";
/** The full name of the current ARQ version */
public static final String VERSION = metadata.get(PATH+".version", "unknown") ;
/** The date and time at which this release was built */
public static final String BUILD_DATE = metadata.get(PATH+".build.datetime", "unset") ;
// Final initialization (in case any statics in this file are important).
static {
initlization2() ;
}
private static void initlization2()
{
SystemInfo systemInfo = new SystemInfo(SDB.sdbIRI, SDB.PATH, SDB.VERSION, SDB.BUILD_DATE) ;
SystemARQ.registerSubSystem(systemInfo) ;
}
}