/**
 *                                                                            
 * Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
 *                                                                            
 * All rights reserved. This program and the accompanying materials           
 * are made available under the terms of the Eclipse Public License v1.0       
 * which accompanies this distribution, and is available at                  
 * http://www.eclipse.org/legal/epl-v10.html                                 
 *                                                                            
 * Contributors:   
 * Christophe Loetz (Loetz GmbH&Co.KG) - initial implementation 
 */
package org.eclipse.osbp.xtext.reportdsl.oda.datamart.impl;

import org.eclipse.birt.report.model.api.SessionHandle;
import org.eclipse.datatools.connectivity.oda.IConnection;
import org.eclipse.datatools.connectivity.oda.IDriver;
import org.eclipse.datatools.connectivity.oda.LogConfiguration;
import org.eclipse.datatools.connectivity.oda.OdaException;
import org.eclipse.datatools.connectivity.oda.util.manifest.DataTypeMapping;
import org.eclipse.datatools.connectivity.oda.util.manifest.ExtensionManifest;
import org.eclipse.datatools.connectivity.oda.util.manifest.ManifestExplorer;

/**
 * Implementation class of IDriver for an ODA runtime driver.
 */
public class Driver implements IDriver {
    static String ODA_DATA_SOURCE_ID = "org.eclipse.osbp.xtext.reportdsl.oda.datamart";  //$NON-NLS-1$
    
	public Driver() {
		super();
		SessionHandle.setBirtResourcePath("i18n/I18N");
	}

	/*
	 * @see org.eclipse.datatools.connectivity.oda.IDriver#getConnection(java.lang.String)
	 */
	public IConnection getConnection( String dataSourceType ) throws OdaException {
        // assumes that this driver supports only one type of data source,
        // ignores the specified dataSourceType
        return new Connection();
	}

	/*
	 * @see org.eclipse.datatools.connectivity.oda.IDriver#setLogConfiguration(org.eclipse.datatools.connectivity.oda.LogConfiguration)
	 */
	public void setLogConfiguration( LogConfiguration logConfig ) throws OdaException {
		// do nothing; assumes simple driver has no logging
	}

	/*
	 * @see org.eclipse.datatools.connectivity.oda.IDriver#getMaxConnections()
	 */
	public int getMaxConnections() throws OdaException {
		return 0;	// no limit
	}
	
	/*
	 * @see org.eclipse.datatools.connectivity.oda.IDriver#setAppContext(java.lang.Object)
	 */
	public void setAppContext( Object context ) throws OdaException {
//		System.err.println(this.getClass().getSimpleName()+".setAppContext: "+(context == null ? "<null>" : context.toString()));
	    // do nothing; assumes no support for pass-through context
	}

    /**
     * Returns the object that represents this extension's manifest.
     * @throws OdaException
     */
    static ExtensionManifest getManifest() throws OdaException {
        return ManifestExplorer.getInstance().getExtensionManifest( ODA_DATA_SOURCE_ID );
    }

    /**
     * Returns the native data type name of the specified code, as
     * defined in this data source extension's manifest.
     * @param nativeTypeCode    the native data type code
     * @return                  corresponding native data type name
     * @throws OdaException     if lookup fails
     */
    static String getNativeDataTypeName( int nativeDataTypeCode ) throws OdaException {
        DataTypeMapping typeMapping = getManifest().getDataSetType( null ).getDataTypeMapping( nativeDataTypeCode );
        if( typeMapping != null ) {
            return typeMapping.getNativeType();
        }
		throw new OdaException( String.format(
			"%s.getNativeDataTypeName(%d):\nNative data type code %d could not be found in the DataTypeMapping",
			Driver.class.getCanonicalName(),
			nativeDataTypeCode,
			nativeDataTypeCode
		)); //$NON-NLS-1$
    }
}