/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
*/

package org.pentaho.reporting.libraries.resourceloader;

import java.io.Serializable;

public class ParameterKey implements Serializable {
  private String name;
  private transient int hashKey;
  private static final long serialVersionUID = 4574332935778105499L;

  /**
   * Constructor is package-protected so that no third-party can create subclasses.
   *
   * @param name
   */
  ParameterKey( final String name ) {
    if ( name == null ) {
      throw new NullPointerException();
    }
    this.name = name;
  }

  public boolean equals( final Object o ) {
    if ( this == o ) {
      return true;
    }
    if ( o == null || getClass() != o.getClass() ) {
      return false;
    }

    final ParameterKey that = (ParameterKey) o;

    if ( !name.equals( that.name ) ) {
      return false;
    }

    return true;
  }

  public int hashCode() {
    if ( hashKey == 0 ) {
      hashKey = name.hashCode();
    }
    return hashKey;
  }

  public String getName() {
    return name;
  }

  public String toString() {
    return getClass().getName() + "{name=" + getName() + "}";
  }
}