/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 *
 */
package org.geotools.arcsde.data.view;

import java.io.IOException;

import net.sf.jsqlparser.schema.Table;

import org.geotools.arcsde.session.ISession;

/**
 * Utility used to qualify table names
 * 
 * @author Gabriel Roldan, Axios Engineering
 * @version $Id$
 * @source $URL:
 *         http://svn.geotools.org/geotools/trunk/gt/modules/plugin/arcsde/datastore/src/main/java
 *         /org/geotools/arcsde/data/view/TableQualifier.java $
 * @since 2.3.x
 */
class TableQualifier {
    /**
     * Returns a Table with the same name as the argument one but fully qualified in the ArcSDE
     * sense.
     * 
     * @param session
     *            connection to obtain database and user name from
     * @param table
     *            table whose schema name is to be qualified
     * @return a qualified Table.
     * @throws IllegalStateException
     *             if an SDE error is catched up while asking <code>conn</code> for the database and
     *             user name.
     */
    public static Table qualify(ISession session, Table table) throws IllegalStateException {
        if (table == null) {
            return null;
        }

        final Table qualifiedTable = new Table();
        final String databaseName;
        final String userName;

        qualifiedTable.setName(table.getName());
        qualifiedTable.setAlias(table.getAlias());

        // String schema = table.getSchemaName(); // user name in sde land

        // if (schema != null) {
        try {
            databaseName = session.getDatabaseName();
            userName = session.getUser();
        } catch (IOException e) {
            throw new IllegalStateException("getting database name: " + e.getMessage());
        }

        // we'll replace the table schema name by
        // databaseName.userName
        String qualifiedSchema = databaseName;
        if ("".equals(qualifiedSchema)) {
            qualifiedSchema = userName;
        } else {
            qualifiedSchema += ("." + userName);
        }

        qualifiedTable.setSchemaName(qualifiedSchema.toUpperCase());
        // }

        return qualifiedTable;
    }
}