ozonedocumenttypeimpl.java

Java的面向对象数据库系统的源代码

// You can redistribute this software and/or modify it under the terms of
// the Ozone Library License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-@year@ by SMB GmbH. All rights reserved.
//
// $Id: OzoneDocumentTypeImpl.java,v 1.1 2003/11/02 18:10:03 per_nyfelt Exp $
package org.ozoneDB.xml.dom4j.o3impl;

import org.dom4j.DocumentFactory;
import org.dom4j.Node;
import org.dom4j.NodeFactory;
import org.dom4j.XPathFactory;
import org.ozoneDB.OzoneCompatible;
import org.ozoneDB.OzoneInterface;
import org.ozoneDB.OzoneRemoteException;
import org.ozoneDB.xml.dom4j.OzoneDocumentFactory;
import org.ozoneDB.xml.dom4j.OzoneDocumentType;

/**
 *
 * @author Per Nyfelt
 */
public class OzoneDocumentTypeImpl extends DefaultDocumentType implements OzoneDocumentType, OzoneCompatible {

    final static long serialVersionUID = 1L;

    private void init() {
    }

    public OzoneDocumentTypeImpl() {
        init();
    }

    public static OzoneDocumentType create(OzoneInterface db) {
        return (OzoneDocumentType) db.createObject(OzoneDocumentTypeImpl.class);
    }

    /** <p>This will create a new <code>DocumentType</code>
     * with a reference to the external DTD</p>
     *
     * @param elementName is the root element name of the document type
     * @param systemID is the system ID of the external DTD
     */
    public OzoneDocumentTypeImpl(String elementName, String systemID) {
        super(elementName, systemID);
        init();
    }

    public static OzoneDocumentType create(OzoneInterface db, String elementName, String systemID) {
        final Class[] signature = new Class[] {String.class, String.class};
        return (OzoneDocumentType) db.createObject(OzoneAttributeImpl.class,
                signature,
                new Object[]{elementName, systemID});
    }

    /** <p>This will create a new <code>DocumentType</code>
     * with a reference to the external DTD</p>
     *
     * @param elementName is the root element name of the document type
     * @param publicID is the public ID of the DTD
     * @param systemID is the system ID of the DTD
     */
    public OzoneDocumentTypeImpl(String elementName, String publicID, String systemID) {
        super(elementName, publicID, systemID);
        init();
    }

    public static OzoneDocumentType create(OzoneInterface db, String elementName, String publicID, String systemID) {
        final Class[] signature = new Class[] {String.class, String.class, String.class};
        return (OzoneDocumentType) db.createObject(OzoneAttributeImpl.class,
                signature,
                new Object[]{elementName, publicID, systemID});
    }

    public DocumentFactory getDocumentFactory() {
        throw new OzoneRemoteException("getDocumentFactory will not work in Ozone");
    }

    protected NodeFactory getNodeFactory() {
        try {
            // todo: might be faster to return super.getNodeFactory() if it is instanceof OzoneCompatible first
            // before falling back to object for name look-up
            return (NodeFactory) database().objectForName(OzoneDocumentFactory.OBJECT_NAME);
        } catch (Exception e) {
            throw new OzoneRemoteException("NodeFctory not registered" + e.toString());
        }
    }

    protected XPathFactory getXPathFactory() {
        try {
            // todo: might be faster to return super.getXPathFactory() if it is instanceof OzoneCompatible first
            // before falling back to object for name look-up
            return (XPathFactory) database().objectForName(OzoneDocumentFactory.OBJECT_NAME);
        } catch (Exception e) {
            throw new OzoneRemoteException("XPathFactory not registered" + e.toString());
        }
    }

    public Object clone() {
        try {
            Node answer = (Node) database().copyObject(self());
            answer.setDocument(null);
            answer.setParent(null);
            return answer;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public void onCreate() {
    }

    public void onActivate() {
    }

    public void onPassivate() {
    }

    public void onDelete() {
    }
}