/* DomNotation.java --
Copyright (C) 1999,2000,2001,2004 Free Software Foundation, Inc.
This file is part of GNU Classpath.
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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;
}
}