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/*
 * Enhydra Java Application Server Project
 * 
 * The contents of this file are subject to the Enhydra Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License on
 * the Enhydra web site ( http://www.enhydra.org/ ).
 * 
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See 
 * the License for the specific terms governing rights and limitations
 * under the License.
 * 
 * Contributor(s):
 * 
 * $Id: CHTMLDocumentImpl.java,v 1.5 2005/01/26 08:28:45 jkjome Exp $
 */

package org.enhydra.wireless.chtml.dom.xerces;

import java.lang.reflect.Constructor;
import java.util.HashMap;

import org.enhydra.apache.html.dom.HTMLAnchorElementImpl;
import org.enhydra.apache.html.dom.HTMLBRElementImpl;
import org.enhydra.apache.html.dom.HTMLBaseElementImpl;
import org.enhydra.apache.html.dom.HTMLBodyElementImpl;
import org.enhydra.apache.html.dom.HTMLDListElementImpl;
import org.enhydra.apache.html.dom.HTMLDOMImplementationImpl;
import org.enhydra.apache.html.dom.HTMLDirectoryElementImpl;
import org.enhydra.apache.html.dom.HTMLDivElementImpl;
import org.enhydra.apache.html.dom.HTMLDocumentImpl;
import org.enhydra.apache.html.dom.HTMLElementImpl;
import org.enhydra.apache.html.dom.HTMLFontElementImpl;
import org.enhydra.apache.html.dom.HTMLFormElementImpl;
import org.enhydra.apache.html.dom.HTMLHRElementImpl;
import org.enhydra.apache.html.dom.HTMLHeadElementImpl;
import org.enhydra.apache.html.dom.HTMLHeadingElementImpl;
import org.enhydra.apache.html.dom.HTMLHtmlElementImpl;
import org.enhydra.apache.html.dom.HTMLImageElementImpl;
import org.enhydra.apache.html.dom.HTMLInputElementImpl;
import org.enhydra.apache.html.dom.HTMLLIElementImpl;
import org.enhydra.apache.html.dom.HTMLMenuElementImpl;
import org.enhydra.apache.html.dom.HTMLMetaElementImpl;
import org.enhydra.apache.html.dom.HTMLOListElementImpl;
import org.enhydra.apache.html.dom.HTMLOptionElementImpl;
import org.enhydra.apache.html.dom.HTMLParagraphElementImpl;
import org.enhydra.apache.html.dom.HTMLPreElementImpl;
import org.enhydra.apache.html.dom.HTMLQuoteElementImpl;
import org.enhydra.apache.html.dom.HTMLSelectElementImpl;
import org.enhydra.apache.html.dom.HTMLTextAreaElementImpl;
import org.enhydra.apache.html.dom.HTMLTitleElementImpl;
import org.enhydra.apache.html.dom.HTMLUListElementImpl;
import org.enhydra.wireless.chtml.dom.CHTMLDocument;
import org.enhydra.xml.xmlc.XMLObject;
import org.enhydra.xml.xmlc.XMLObjectLink;
import org.w3c.dom.DOMException;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Element;

/**
 * CHTML Document interfaces.  This implements a subset of the HTML DOM that
 * corresponds to CHTML defined by DoCoMo. See
 * CHTML specification
 * for details.
 *
 * @see org.w3c.dom.html.HTMLDocument
 */
public class CHTMLDocumentImpl extends HTMLDocumentImpl
    implements CHTMLDocument, XMLObjectLink {

    /**
     * Names and classes of HTML element types.
     */
    private static HashMap fElementTypes;

    /**
     * Signature used to locate constructor of HTML element classes.
     */
    private static final Class[] fElemClassSig = new Class[] {
	HTMLDocumentImpl.class, String.class
    };


    /**
     * overload in order to return the correct dom implementation for cHTML (actually HTML)
     * @see org.enhydra.apache.xerces.dom.DocumentImpl#getImplementation
     */
    public DOMImplementation getImplementation() {
        return HTMLDOMImplementationImpl.getDOMImplementation();
    }

    /**
     * @see HTMLDocumentImpl#createElementNS
     */
    public Element createElementNS(String namespaceURI, 
				   String qualifiedName) throws DOMException {
        if ((namespaceURI == null) || (namespaceURI.length() == 0)) {
            return createElement(qualifiedName);
        } else {
            return super.createElementNS(namespaceURI, qualifiedName);
        }
    } 

    /**
     * @see HTMLDocumentImpl#createElement
     */
    public Element createElement(String tagName) throws DOMException {
	Class elemClass;
	Constructor cnst;

	elemClass = (Class)fElementTypes.get(tagName.toUpperCase());
	if (elemClass != null) {
	    try {
		cnst = elemClass.getConstructor(fElemClassSig);

		return (Element)cnst.newInstance(new Object[] {
		    this, tagName
		});
	    } catch (Exception except) {
		Throwable thrw;

		if (except instanceof java.lang.reflect.InvocationTargetException) {
		    thrw = 
			((java.lang.reflect.InvocationTargetException) except).getTargetException();
		} else {
		    thrw = except;
		}

		throw new IllegalStateException("HTM15 Tag '" + tagName 
						+ "' associated with an Element class that failed to construct.\n" 
						+ thrw.getClass().getName() + " " + thrw.getMessage());
	    } 
	} 

	return new HTMLElementImpl(this, tagName);
    } 

    /**
     * Class initializer.
     */
    static {
	fElementTypes = new HashMap();

        fElementTypes.put("A", HTMLAnchorElementImpl.class);
        fElementTypes.put("BASE", HTMLBaseElementImpl.class);
        fElementTypes.put("BLOCKQUOTE", HTMLQuoteElementImpl.class);
        fElementTypes.put("BODY", HTMLBodyElementImpl.class);
        fElementTypes.put("BR", HTMLBRElementImpl.class);
        fElementTypes.put("DIR", HTMLDirectoryElementImpl.class);
        fElementTypes.put("DIV", HTMLDivElementImpl.class);
        fElementTypes.put("DL", HTMLDListElementImpl.class);
        fElementTypes.put("FONT", HTMLFontElementImpl.class);
        fElementTypes.put("FORM", HTMLFormElementImpl.class);
        fElementTypes.put("H1", HTMLHeadingElementImpl.class);
        fElementTypes.put("H2", HTMLHeadingElementImpl.class);
        fElementTypes.put("H3", HTMLHeadingElementImpl.class);
        fElementTypes.put("H4", HTMLHeadingElementImpl.class);
        fElementTypes.put("H5", HTMLHeadingElementImpl.class);
        fElementTypes.put("H6", HTMLHeadingElementImpl.class);
        fElementTypes.put("HEAD", HTMLHeadElementImpl.class);
        fElementTypes.put("HEADING", HTMLHeadingElementImpl.class);
        fElementTypes.put("HR", HTMLHRElementImpl.class);
        fElementTypes.put("HTML", HTMLHtmlElementImpl.class);
        fElementTypes.put("IMG", HTMLImageElementImpl.class);
        fElementTypes.put("INPUT", HTMLInputElementImpl.class);
        fElementTypes.put("LI", HTMLLIElementImpl.class);
        fElementTypes.put("MENU", HTMLMenuElementImpl.class);
        fElementTypes.put("META", HTMLMetaElementImpl.class);
        fElementTypes.put("OL", HTMLOListElementImpl.class);
        fElementTypes.put("OPTION", HTMLOptionElementImpl.class);
        fElementTypes.put("P", HTMLParagraphElementImpl.class);
        fElementTypes.put("PLAINTEXT", HTMLPreElementImpl.class);
        fElementTypes.put("PRE", HTMLPreElementImpl.class);
        fElementTypes.put("SELECT", HTMLSelectElementImpl.class);
        fElementTypes.put("TEXTAREA", HTMLTextAreaElementImpl.class);
        fElementTypes.put("TITLE", HTMLTitleElementImpl.class);
        fElementTypes.put("UL", HTMLUListElementImpl.class);
    }

    //-------------------------------------------------------------------------
    // XMLObjectLink implementation
    //-------------------------------------------------------------------------

    /**
     * Reference to XMLObject containing this Document.
     */
    private XMLObject fXmlObjectLink;

    /**
     * @see XMLObjectLink#setXMLObject
     */
    public void setXMLObject(XMLObject xmlObject) {
        fXmlObjectLink = xmlObject;
    }

    /**
     * @see XMLObjectLink#getXMLObject
     */
    public XMLObject getXMLObject() {
        return fXmlObjectLink;
    }

}