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package com.sun.gjc.spi;

import com.sun.gjc.spi.ManagedConnection;

import java.sql.SQLException;
import javax.resource.ResourceException;

import com.sun.logging.*;

import java.util.logging.Logger;
import java.util.logging.Level;

/**
 * <code>ManagedConnectionMetaData</code> implementation for Generic JDBC Connector.
 *
 * @author Evani Sai Surya Kiran
 * @version 1.0, 02/08/03
 */
public class ManagedConnectionMetaData implements javax.resource.spi.ManagedConnectionMetaData {

    private java.sql.DatabaseMetaData dmd = null;
    private ManagedConnection mc;

    private static Logger _logger;

    static {
        _logger = LogDomains.getLogger(LogDomains.RSR_LOGGER);
    }

    private boolean debug = false;

    /**
     * Constructor for <code>ManagedConnectionMetaData</code>
     *
     * @param mc <code>ManagedConnection</code>
     * @throws <code>ResourceException</code> if getting the DatabaseMetaData object fails
     */
    public ManagedConnectionMetaData(ManagedConnection mc) throws ResourceException {
        try {
            this.mc = mc;
            dmd = mc.getActualConnection().getMetaData();
        } catch (SQLException sqle) {
            _logger.log(Level.SEVERE, "jdbc.exc_md", sqle);
            throw new ResourceException(sqle.getMessage());
        }
    }

    /**
     * Returns product name of the underlying EIS instance connected
     * through the ManagedConnection.
     *
     * @return Product name of the EIS instance
     * @throws <code>ResourceException</code>
     */
    public String getEISProductName() throws ResourceException {
        try {
            return dmd.getDatabaseProductName();
        } catch (SQLException sqle) {
            _logger.log(Level.SEVERE, "jdbc.exc_eis_prodname", sqle);
            throw new ResourceException(sqle.getMessage());
        }
    }

    /**
     * Returns product version of the underlying EIS instance connected
     * through the ManagedConnection.
     *
     * @return Product version of the EIS instance
     * @throws <code>ResourceException</code>
     */
    public String getEISProductVersion() throws ResourceException {
        try {
            return dmd.getDatabaseProductVersion();
        } catch (SQLException sqle) {
            _logger.log(Level.SEVERE, "jdbc.exc_eis_prodvers", sqle);
            throw new ResourceException(sqle.getMessage(), sqle.getMessage());
        }
    }

    /**
     * Returns maximum limit on number of active concurrent connections
     * that an EIS instance can support across client processes.
     *
     * @return Maximum limit for number of active concurrent connections
     * @throws <code>ResourceException</code>
     */
    public int getMaxConnections() throws ResourceException {
        try {
            return dmd.getMaxConnections();
        } catch (SQLException sqle) {
            _logger.log(Level.SEVERE, "jdbc.exc_eis_maxconn");
            throw new ResourceException(sqle.getMessage());
        }
    }

    /**
     * Returns name of the user associated with the ManagedConnection instance. The name
     * corresponds to the resource principal under whose whose security context, a connection
     * to the EIS instance has been established.
     *
     * @return name of the user
     * @throws <code>ResourceException</code>
     */
    public String getUserName() throws ResourceException {
        javax.resource.spi.security.PasswordCredential pc = mc.getPasswordCredential();
        if (pc != null) {
            return pc.getUserName();
        }

        return mc.getManagedConnectionFactory().getUser();
    }
}