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SchemaCrawler is an open-source Java API that makes working with database metadata as easy as working with plain old Java objects. SchemaCrawler is also a database schema discovery and comprehension, and schema documentation tool. You can search for database schema objects using regular expressions, and output the schema and data in a readable text format. The output is designed to be diff-ed against other database schemas.

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/*
 *
 * SchemaCrawler
 * http://www.schemacrawler.com
 * Copyright (c) 2000-2015, Sualeh Fatehi.
 *
 * 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;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 */

package schemacrawler.tools.commandline;


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

import schemacrawler.Version;
import schemacrawler.schemacrawler.Config;
import schemacrawler.schemacrawler.SchemaCrawlerException;

/**
 * Options for the command-line.
 *
 * @author sfatehi
 */
abstract class BaseDatabaseConnectionOptionsParser
  extends BaseConfigOptionsParser
{

  private static final Logger LOGGER = Logger
    .getLogger(BaseDatabaseConnectionOptionsParser.class.getName());

  private static final String USER = "user";
  private static final String PASSWORD = "password";

  BaseDatabaseConnectionOptionsParser(final Config config)
  {
    super(config);
    normalizeOptionName(USER, "u");
    normalizeOptionName(PASSWORD);
  }

  @Override
  public void loadConfig()
    throws SchemaCrawlerException
  {
    setUser();
    setPassword();
  }

  private String promptForPassword()
  {
    final Console console = System.console();
    if (console == null)
    {
      LOGGER.log(Level.WARNING, "System console is not available");
      return null;
    }

    try
    {
      console.format(Version.about());
      final char[] passwordChars = console.readPassword("password: ");
      return new String(passwordChars);
    }
    catch (final Exception e)
    {
      LOGGER.log(Level.WARNING, "System console is not available", e);
      return null;
    }
  }

  private void setPassword()
  {
    final String password;
    if (config.hasValue(PASSWORD))
    {
      password = config.getStringValue(PASSWORD, null);
    }
    else
    {
      password = promptForPassword();
    }
    config.put(PASSWORD, password);
  }

  private void setUser()
  {
    config.put(USER, config.getStringValue(USER, null));
  }

}