MutablePrimaryKey.java

/* 
 *
 * SchemaCrawler
 * http://sourceforge.net/projects/schemacrawler
 * Copyright (c) 2000-2010, 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.build;


import schemacrawler.schema.Index;
import schemacrawler.schema.PrimaryKey;

/**
 * Represents a primary key in a table.
 * 
 * @author Sualeh Fatehi
 */
class MutablePrimaryKey
  extends MutableIndex
  implements PrimaryKey
{

  private static final long serialVersionUID = -7169206178562782087L;

  public final static class PrimaryKeyBuilder
    extends IndexBuilder
  {

    public PrimaryKeyBuilder(Index index)
    {
      super(index);
    }

    public final PrimaryKey build()
    {
      return new MutablePrimaryKey(this);
    }

  }

  /**
   * Copies information from an index.
   * 
   * @param index
   *        Index
   */
  private MutablePrimaryKey(final PrimaryKeyBuilder builder)
  {
    super(builder);
  }

  /**
   * {@inheritDoc}
   * 
   * @see Index#isUnique()
   */
  @Override
  public final boolean isUnique()
  {
    return true;
  }

}