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/* DomNotation.java --

   Copyright (C) 1999,2000,2001,2004 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

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any later version.

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

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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

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

permission to link this library with independent modules to produce an

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package gnu.xml.dom;

import org.w3c.dom.Notation;

/**

 * <p> "Notation" implementation.  This is a non-core DOM class, supporting

 * the "XML" feature. </p>

 *

 * <p> Although unparsed entities using this notation can be detected using

 * DOM, neither NOTATIONS nor ENTITY/ENTITIES attributes can be so detected.

 * More, there is no portable way to construct a Notation node, so there's

 * no way that vendor-neutral DOM construction APIs could even report a

 * NOTATION used to identify the intended meaning of a ProcessingInstruction.

 * </p>

 *

 * <p> In short, <em>avoid using this DOM functionality</em>.

 *

 * @see DomDoctype

 * @see DomEntity

 * @see DomPI

 *

 * @author David Brownell

 * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>

 */

public class DomNotation

  extends DomExtern

  implements Notation

{

  /**

   * Constructs a Notation node associated with the specified document,

   * with the specified descriptive data.  Note that at least one of

   * the PUBLIC and SYSTEM identifiers must be provided; unlike other

   * external objects in XML, notations may have only a PUBLIC identifier.

   *

   * <p>This constructor should only be invoked by a DomDoctype object

   * as part of its declareNotation functionality, or through a subclass

   * which is similarly used in a "Sub-DOM" style layer.

   *

   * @param owner The document with which this notation is associated

   * @param name Name of this notation

   * @param publicId If non-null, provides the notation's PUBLIC identifier

   * @param systemId If non-null, rovides the notation's SYSTEM identifier

   */

  protected DomNotation(DomDocument owner,

                        String name,

                        String publicId,

                        String systemId)

  {

    super(NOTATION_NODE, owner, name, publicId, systemId);

    makeReadonly();

  }

  /**

   * The base URI of an external entity is its system ID.

   * The base URI of an internal entity is the parent document's base URI.

   * @since DOM Level 3 Core

   */

  public String getBaseURI()

  {

    String systemId = getSystemId();

    return (systemId == null) ? owner.getBaseURI() : systemId;

  }

}