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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.
 * 
 * The Initial Developer of the Enhydra Application Server is Lutris
 * Technologies, Inc. The Enhydra Application Server and portions created
 * by Lutris Technologies, Inc. are Copyright Lutris Technologies, Inc.
 * All Rights Reserved.
 * 
 * Contributor(s):
 * 
 * $Id: DocumentFormat.java,v 1.1.1.1 2003/03/10 16:36:23 taweili Exp $
 */

package org.enhydra.xml.xmlc.metadata;

/**
 * Enumerated type for the format of a document (HTML or XML).
 */
public class DocumentFormat extends EnumeratedType {
    /**
     * Constant for a XML document.
     */
    public static final DocumentFormat XML = new DocumentFormat("xml");

    /**
     * Constant for a HTML document.
     */
    public static final DocumentFormat HTML = new DocumentFormat("html");

    /**
     * Constant for an unspecified document type.
     */
    public static final DocumentFormat UNSPECIFIED = new DocumentFormat("unspecified");

    /**
     * Internal constructor.  Only a fixed set of types are allowed.
     */
    private DocumentFormat(String name) {
        super(name);
    }

    /**
     * Get the object for the specified type.  If desiredType is null,
     * return UNSPECIFIED.
     */
    public static DocumentFormat getType(String desiredType) {
        if (desiredType == null) {
            return UNSPECIFIED;
        } else if (XML.fName.equals(desiredType)) {
            return XML;
        } else if (HTML.fName.equals(desiredType)) {
            return HTML;
        } else if (UNSPECIFIED.fName.equals(desiredType)) {
            return UNSPECIFIED;
        } else {
            throw new IllegalArgumentException("Invalid DocumentFormat: \""
                                               + desiredType
                                               + "\", expected of \""
                                               + XML.fName + "\", \""
                                               + HTML.fName + "\", or \""
                                               + UNSPECIFIED.fName + "\"");
        }
    }
}