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/*
 * (c) Copyright 2006, 2007, 2008, 2009 Hewlett-Packard Development Company, LP
 * All rights reserved.
 * [See end of file]
 */

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.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 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) {}
            
        // ModelRDB special
        storeDesc.rdbModelName = GraphUtils.getStringValue(root, AssemblerVocab.pModelRDBname) ;
        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 ;
    }
    
}

/*
 * (c) Copyright 2006, 2007, 2008, 2009 Hewlett-Packard Development Company, LP
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */