/*
* 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 com.hp.hpl.jena.sdb.assembler;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.hp.hpl.jena.rdf.model.Resource;
import com.hp.hpl.jena.assembler.Assembler;
import com.hp.hpl.jena.assembler.Mode;
import com.hp.hpl.jena.assembler.assemblers.AssemblerBase;
import com.hp.hpl.jena.sparql.util.graph.GraphUtils;
import com.hp.hpl.jena.sdb.SDB;
import com.hp.hpl.jena.sdb.SDBException;
import com.hp.hpl.jena.sdb.StoreDesc;
import com.hp.hpl.jena.sdb.sql.MySQLEngineType;
import com.hp.hpl.jena.sdb.sql.SAPStorageType;
import com.hp.hpl.jena.sdb.sql.SDBConnectionDesc;
import com.hp.hpl.jena.sdb.store.Feature;
import com.hp.hpl.jena.sdb.store.FeatureSet;
public class StoreDescAssembler extends AssemblerBase implements Assembler
{
static { SDB.init() ; }
private static Logger log = LoggerFactory.getLogger(StoreDescAssembler.class) ;
@Override
public StoreDesc open(Assembler a, Resource root, Mode mode)
{
SDBConnectionDesc sdbConnDesc = null ;
Resource c = GraphUtils.getResourceValue(root, AssemblerVocab.pConnection) ;
if ( c != null )
sdbConnDesc = (SDBConnectionDesc)a.open(c) ;
String layoutName = GraphUtils.getStringValue(root, AssemblerVocab.pLayout) ;
String dbType = chooseDBType(root, sdbConnDesc) ;
// Features
List<Resource> x = GraphUtils.multiValueResource(root, AssemblerVocab.featureProperty) ;
FeatureSet fSet = new FeatureSet() ;
for ( Resource r : x )
{
String n = GraphUtils.getStringValue(r, AssemblerVocab.featureNameProperty) ;
String v = GraphUtils.getStringValue(r, AssemblerVocab.featureValueProperty) ;
Feature f = new Feature(new Feature.Name(n), v) ;
fSet.addFeature(f) ;
}
StoreDesc storeDesc = new StoreDesc(layoutName, dbType, fSet) ;
storeDesc.connDesc = sdbConnDesc ;
// MySQL specials
String engineName = GraphUtils.getStringValue(root, AssemblerVocab.pMySQLEngine) ;
storeDesc.engineType = null ;
if ( engineName != null )
try { storeDesc.engineType= MySQLEngineType.convert(engineName) ; }
catch (SDBException ex) {}
// SAP specials
String storageType = GraphUtils.getStringValue(root, AssemblerVocab.pStorageType) ;
if ( storageType != null )
try { storeDesc.storageType= SAPStorageType.convert(storageType) ; }
catch (SDBException ex) {}
return storeDesc ;
}
private String chooseDBType(Resource root, SDBConnectionDesc sdbConnDesc)
{
// --- DB Type
// Two places the dbType can be (it's needed twice)
// The connection description and the store description
// Propagate one ot the other.
// If specified twice, make sure they are the same.
String dbTypeConn = (sdbConnDesc != null) ? sdbConnDesc.getType() : null ;
String dbType = GraphUtils.getStringValue(root, AssemblerVocab.pSDBtype) ;
if ( dbTypeConn != null && dbType != null )
{
if ( ! dbTypeConn.equals(dbType) )
{
String $ = String.format(
"Connection-specified DB type and store description dbtype are different : %s %s", dbTypeConn, dbType ) ;
log.warn($) ;
}
}
else if ( dbType != null )
{
if ( sdbConnDesc != null )
sdbConnDesc.setType(dbType) ;
}
else if ( dbTypeConn != null )
dbType = dbTypeConn ;
else
{
// Both null.
log.warn("Failed to determine the database type (not in store description, no connection description)") ;
throw new SDBException("No database type found") ;
}
return dbType ;
}
}