/*
 * DomExtern.java
 * Copyright (C) 1999,2000,2001,2004 The Free Software Foundation
 * 
 * This file is part of GNU JAXP, a library.
 *
 * GNU JAXP 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 of the License, or
 * (at your option) any later version.
 * 
 * GNU JAXP 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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
 * obliged to do so.  If you do not wish to do so, delete this
 * exception statement from your version. 
 */

package gnu.xml.dom;

/**
 * <p> Abstract implemention of nodes describing external DTD-related
 * objects.  This facilitates reusing code for Entity, Notation, and
 * DocumentType (really, external subset) nodes.  Such support is not
 * part of the core DOM; it's for the "XML" feature.  </p>
 *
 * <p> Note that you are strongly advised to avoid using the DOM
 * features that take advantage of this class, since (as of L2) none
 * of them is defined fully enough to permit full use of the
 * XML feature they partially expose. </p>
 *
 * @author David Brownell 
 * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
 */
public abstract class DomExtern
  extends DomNode
{
 
  private final String name;
  private final String publicId;
  private final String systemId;
  
  /**
   * Constructs a node associated with the specified document,
   * with the specified descriptive data.
   *
   * @param owner The document with which this object is associated
   * @param name Name of this object
   * @param publicId If non-null, provides the entity's PUBLIC identifier
   * @param systemId If non-null, provides the entity's SYSTEM identifier
   */
  // package private
  DomExtern(short nodeType,
            DomDocument owner,
            String name,
            String publicId,
            String systemId)
  {
    super(nodeType, owner);
    this.name = name;
    this.publicId = publicId;
    this.systemId = systemId;
  }

  /**
   * <b>DOM L1</b>
   * Returns the SYSTEM identifier associated with this object, if any.
   */
  public final String getSystemId()
  {
    return systemId;
  }

  /**
   * <b>DOM L1</b>
   * Returns the PUBLIC identifier associated with this object, if any.
   */
  public final String getPublicId()
  {
    return publicId;
  }
  
  /**
   * <b>DOM L1</b>
   * Returns the object's name.
   */
  public final String getNodeName()
  {
    return name;
  }

  public final String getLocalName()
  {
    return name;
  }
  
}

