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/*
* $Id: DomNsNode.java,v 1.1.1.1 2003-02-01 02:10:17 cbj Exp $
* Copyright (C) 1999-2001 David Brownell
*
* 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
*
* As a special exception, if you link this library with other files to
* produce an executable, this library does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* This exception does not however invalidate any other reasons why the
* executable file might be covered by the GNU General Public License.
*/
package gnu.xml.dom;
import org.w3c.dom.*;
// $Id: DomNsNode.java,v 1.1.1.1 2003-02-01 02:10:17 cbj Exp $
/**
* <p> Abstract implemention of namespace support. This facilitates
* sharing code for attribute and element nodes.
*
* @author David Brownell
* @version $Date: 2003-02-01 02:10:17 $
*/
public abstract class DomNsNode extends DomNode
{
private String name; // changed by setPrefix
private final String namespace;
/**
* Constructs a node associated with the specified document, and
* with the specified namespace information.
*
* @param owner The document with which this entity is associated
* @param namespaceURI Combined with the local part of the name,
* this identifies a type of element or attribute; may be null.
* If this is the empty string, it is reassigned as null so that
* applications only need to test that case.
* @param name Name of this node, which may include a prefix
*/
// package private
DomNsNode (Document owner, String namespaceURI, String name)
{
super (owner);
this.name = name;
if ("".equals (namespaceURI))
namespaceURI = null;
this.namespace = namespaceURI;
}
/**
* <b>DOM L1</b>
* Returns the node's name, including any namespace prefix.
*/
final public String getNodeName ()
{
return name;
}
/**
* <b>DOM L2</b>
* Returns the node's namespace URI
* <em>or null</em> if the node name is not namespace scoped.
*/
final public String getNamespaceURI ()
{
return namespace;
}
/**
* <b>DOM L2</b>
* Returns any prefix part of the node's name (before any colon).
*/
public String getPrefix ()
{
if (namespace == null)
return null;
int index = name.indexOf (':');
if (index < 0)
return null;
else
return name.substring (0, index);
}
/**
* <b>DOM L2</b>
* Assigns the prefix part of the node's name (before any colon).
*/
public void setPrefix (String prefix)
{
String local = getLocalName ();
if (isReadonly ())
throw new DomEx (DomEx.NO_MODIFICATION_ALLOWED_ERR);
if (prefix == null) {
name = local;
return;
} else if (namespace == null)
throw new DomEx (DomEx.NAMESPACE_ERR,
"can't set prefix, node has no namespace URI", this, 0);
DomDocument.verifyXmlName (prefix);
if (prefix.indexOf (':') != -1)
throw new DomEx (DomEx.NAMESPACE_ERR,
"illegal prefix " + prefix, this, 0);
if ("xml".equals (prefix)
&& !DomDocument.xmlNamespace.equals (namespace))
throw new DomEx (DomEx.NAMESPACE_ERR,
"xml namespace is always " + DomDocument.xmlNamespace, this, 0);
if ("xmlns".equals (prefix)) {
if (namespace != null || getNodeType () != ATTRIBUTE_NODE)
throw new DomEx (DomEx.NAMESPACE_ERR,
"xmlns attribute prefix is reserved", this, 0);
} else if (getNodeType () == ATTRIBUTE_NODE
&& ("xmlns".equals (name) || name.startsWith ("xmlns:")))
throw new DomEx (DomEx.NAMESPACE_ERR,
"namespace declarations can't change names", this, 0);
name = prefix + ':' + local;
}
/**
* <b>DOM L2</b>
* Returns the local part of the node's name (after any colon),
* <em>or null</em> if the node name is not namespace scoped.
*/
public String getLocalName ()
{
if (namespace == null)
return null;
int index = name.indexOf (':');
if (index < 0)
return name;
else
return name.substring (index + 1);
}
}
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