/*
* 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.layout1;
import static com.hp.hpl.jena.sdb.sql.SQLUtils.sqlStr;
import java.sql.SQLException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.hp.hpl.jena.sdb.SDBException;
import com.hp.hpl.jena.sdb.layout2.TablePrefixes;
import com.hp.hpl.jena.sdb.sql.MySQLEngineType;
import com.hp.hpl.jena.sdb.sql.SDBConnection;
import com.hp.hpl.jena.sdb.sql.SDBExceptionSQL;
public class FormatterSimpleMySQL extends FormatterSimple
{
private static Logger log = LoggerFactory.getLogger(FormatterSimpleMySQL.class) ;
private MySQLEngineType engineType ;
// MySQL keys are limited to 765 bytes, and a key is S/P/O
private static final String colDecl = "VARCHAR(200) BINARY NOT NULL" ;
public FormatterSimpleMySQL(SDBConnection connection, MySQLEngineType tableType)
{
super(connection) ;
engineType = tableType ;
if ( engineType == null )
{
log.error("Engine type is null") ;
throw new SDBException("Engine type is null") ;
}
}
@Override
public void truncate()
{
try {
connection().exec("TRUNCATE TABLE Triples") ;
} catch (SQLException ex)
{
log.warn("Exception truncating tables") ;
throw new SDBException("SQLException truncating tables",ex) ;
}
}
@Override
public void format()
{
reformatPrefixesWorker(false) ;
reformatDataWorker() ;
}
private void reformatPrefixesWorker() { reformatPrefixesWorker(false) ; }
private void reformatPrefixesWorker(boolean loadPrefixes)
{
try {
connection().exec("DROP TABLE IF EXISTS Prefixes") ;
connection().exec(sqlStr(
"CREATE TABLE Prefixes (",
" prefix VARCHAR("+TablePrefixes.prefixColWidth+") BINARY NOT NULL ,",
" uri VARCHAR("+TablePrefixes.uriColWidth+") BINARY NOT NULL ,",
" PRIMARY KEY(prefix)",
") ENGINE="+engineType.getEngineName()
)) ;
if ( loadPrefixes )
{
connection().execUpdate("INSERT INTO Prefixes VALUES ('x', 'http://example/')") ;
connection().execUpdate("INSERT INTO Prefixes VALUES ('ex', 'http://example.org/')") ;
connection().execUpdate("INSERT INTO Prefixes VALUES ('rdf', 'http://www.w3.org/1999/02/22-rdf-syntax-ns#')") ;
connection().execUpdate("INSERT INTO Prefixes VALUES ('rdfs', 'http://www.w3.org/2000/01/rdf-schema#')") ;
connection().execUpdate("INSERT INTO Prefixes VALUES ('xsd', 'http://www.w3.org/2001/XMLSchema#')") ;
connection().execUpdate("INSERT INTO Prefixes VALUES ('owl' , 'http://www.w3.org/2002/07/owl#')") ;
connection().execUpdate("INSERT INTO Prefixes VALUES ('foaf', 'http://xmlns.com/foaf/0.1/')") ;
connection().execUpdate("INSERT INTO Prefixes VALUES ('dc', 'http://purl.org/dc/elements/1.1/')") ;
connection().execUpdate("INSERT INTO Prefixes VALUES ('dcterms', 'http://purl.org/dc/terms/')") ;
}
} catch (SQLException ex)
{
log.warn("Exception resetting table 'Prefixes'") ;
throw new SDBException("SQLException resetting table 'Prefixes'",ex) ;
}
}
private void reformatDataWorker()
{
try {
connection().exec("DROP TABLE IF EXISTS Triples") ;
connection().exec(sqlStr(
"CREATE TABLE Triples",
"(",
" s "+colDecl+" ,",
" p "+colDecl+" ,",
" o "+colDecl+" ,",
" PRIMARY KEY (s,p,o)",
")",
"ENGINE="+engineType.getEngineName()+" CHARSET=utf8"
)) ;
} catch (SQLException ex)
{
log.warn("Exception resetting table 'Triples'") ;
throw new SDBException("SQLException resetting table 'Triples'",ex) ;
}
}
// Need this if we need to limit the index lengths
// @Override
// public void addIndexes()
// {
// try {
// connection().exec("CREATE INDEX SubjObj ON "+TableTriples.tableName+" (s(100),o(100))") ;
// connection().exec("CREATE INDEX ObjPred ON "+TableTriples.tableName+" (o(100),p(100))") ;
// connection().exec("CREATE INDEX Pred ON "+TableTriples.tableName+" (p(100))") ;
// } catch (SQLException ex)
// {
// throw new SDBException("SQLException indexing table 'Triples'",ex) ;
// }
// }
@Override
public void dropIndexes()
{
try {
connection().exec("DROP INDEX PredObj ON "+TableDescSPO.name()) ;
connection().exec("DROP INDEX ObjSubj ON "+TableDescSPO.name()) ;
} catch (SQLException ex)
{ throw new SDBExceptionSQL("SQLException dropping indexes for table 'Triples'",ex) ; }
}
}