/*
 * @(#)DOMAttrMapImpl.java   1.11 2000/08/16
 *
 */

package org.w3c.tidy;

import org.w3c.dom.DOMException;

/**
 *
 * DOMAttrMapImpl
 *
 * (c) 1998-2000 (W3C) MIT, INRIA, Keio University
 * See Tidy.java for the copyright notice.
 * Derived from <a href="http://www.w3.org/People/Raggett/tidy">
 * HTML Tidy Release 4 Aug 2000</a>
 *
 * @author  Dave Raggett <dsr@w3.org>
 * @author  Andy Quick <ac.quick@sympatico.ca> (translation to Java)
 * @version 1.4, 1999/09/04 DOM support
 * @version 1.5, 1999/10/23 Tidy Release 27 Sep 1999
 * @version 1.6, 1999/11/01 Tidy Release 22 Oct 1999
 * @version 1.7, 1999/12/06 Tidy Release 30 Nov 1999
 * @version 1.8, 2000/01/22 Tidy Release 13 Jan 2000
 * @version 1.9, 2000/06/03 Tidy Release 30 Apr 2000
 * @version 1.10, 2000/07/22 Tidy Release 8 Jul 2000
 * @version 1.11, 2000/08/16 Tidy Release 4 Aug 2000
 */

public class DOMAttrMapImpl implements org.w3c.dom.NamedNodeMap {

    private AttVal first = null;

    protected DOMAttrMapImpl(AttVal first)
    {
        this.first = first;
    }

    /**
     * @see org.w3c.dom.NamedNodeMap#getNamedItem
     */
    public org.w3c.dom.Node getNamedItem(String name)
    {
        AttVal att = this.first;
        while (att != null) {
            if (att.attribute.equals(name)) break;
            att = att.next;
        }
        if (att != null)
            return att.getAdapter();
        else
            return null;
    }

    /**
     * @see org.w3c.dom.NamedNodeMap#setNamedItem
     */
    public org.w3c.dom.Node setNamedItem(org.w3c.dom.Node arg)
                                             throws DOMException
    {
        // NOT SUPPORTED
        return null;
    }

    /**
     * @see org.w3c.dom.NamedNodeMap#removeNamedItem
     */
    public org.w3c.dom.Node removeNamedItem(String name)
                                                throws DOMException
    {
        // NOT SUPPORTED
        return null;
    }

    /**
     * @see org.w3c.dom.NamedNodeMap#item
     */
    public org.w3c.dom.Node item(int index)
    {
        int i = 0;
        AttVal att = this.first;
        while (att != null) {
            if (i >= index) break;
            i++;
            att = att.next;
        }
        if (att != null)
            return att.getAdapter();
        else
            return null;
    }

    /**
     * @see org.w3c.dom.NamedNodeMap#getLength
     */
    public int getLength()
    {
        int len = 0;
        AttVal att = this.first;
        while (att != null) {
            len++;
            att = att.next;
        }
        return len;
    }

    /**
     * DOM2 - not implemented.
     */
    public org.w3c.dom.Node getNamedItemNS(String namespaceURI,
                                           String localName)
    {
	return null;
    }

    /**
     * DOM2 - not implemented.
     * @exception   org.w3c.dom.DOMException
     */
    public org.w3c.dom.Node setNamedItemNS(org.w3c.dom.Node arg)
        throws org.w3c.dom.DOMException
    {
	return null;
    }

    /**
     * DOM2 - not implemented.
     * @exception   org.w3c.dom.DOMException
     */
    public org.w3c.dom.Node removeNamedItemNS(String namespaceURI,
                                              String localName)
        throws org.w3c.dom.DOMException
    {
	return null;
    }

}