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/* NaturalLanguageSyntax.java --

   Copyright (C) 2006 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath 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

General Public License for more details.

You should have received a copy of the GNU General Public License

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package gnu.javax.print.ipp.attribute;

import java.io.Serializable;

/**

 * <code>NaturalLanguageSyntax</code> is the abstract base class of all

 * attribute classes which provide a natural language (US-ASCII)

 * string as value.

 *

 * @author Wolfgang Baer (WBaer@gmx.de)

 */

public abstract class NaturalLanguageSyntax

  implements Cloneable, Serializable

{

  private final String value;

  /**

   * Creates a <code>NaturalLanguageSyntax</code> object with the given value

   * and locale.

   *

   * @param value the value for this syntax

   *

   * @exception NullPointerException if value is null

   */

  protected NaturalLanguageSyntax(String value)

  {

    if (value == null)

      throw new NullPointerException("value may not be null");

    this.value = value;

  }

  /**

   * Returns the value of this syntax object.

   *

   * @return The value.

   */

  public String getValue()

  {

    return value;

  }

  /**

   * Returns the hashcode for this object.

   *

   * @return The hashcode.

   */

  public int hashCode()

  {

    return value.hashCode();

  }

  /**

   * Tests if the given object is equal to this object.

   *

   * @param obj the object to test

   *

   * @return true if both objects are equal, false otherwise.

   */

  public boolean equals(Object obj)

  {

    if (! (obj instanceof NaturalLanguageSyntax))

      return false;

    NaturalLanguageSyntax tmp = (NaturalLanguageSyntax) obj;

    return value.equals(tmp.getValue());

  }

  /**

   * Returns a string representing the object. The returned

   * string is the underlying text value of this object.

   *

   * @return The string representation.

   */

  public String toString()

  {

    return getValue();

  }

}