MetaDataUtility.java

/* 
 *
 * SchemaCrawler
 * http://sourceforge.net/projects/schemacrawler
 * Copyright (c) 2000-2014, 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.utility;


import schemacrawler.schema.Column;

/**
 * SchemaCrawler utility methods.
 * 
 * @author sfatehi
 */
public final class MetaDataUtility
{

  public enum Connectivity
  {
    unknown,
    zero_one,
    zero_many,
    one_one;
  }

  public static Connectivity getConnectivity(final Column fkColumn)
  {
    if (fkColumn == null)
    {
      return Connectivity.unknown;
    }

    boolean isColumnReference;
    try
    {
      fkColumn.getColumnDataType();
      isColumnReference = false;
    }
    catch (final Exception e)
    {
      isColumnReference = true;
    }
    if (isColumnReference)
    {
      return Connectivity.unknown;
    }

    if (fkColumn.isPartOfPrimaryKey() || fkColumn.isPartOfUniqueIndex())
    {
      return Connectivity.zero_one;
    }
    else
    {
      return Connectivity.zero_many;
    }
  }

  private MetaDataUtility()
  {
    // Prevent instantiation
  }

}