ozoneentityimpl.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: OzoneEntityImpl.java,v 1.1 2003/11/02 18:10:03 per_nyfelt Exp $
package org.ozoneDB.xml.dom4j.o3impl;

import org.dom4j.*;
import org.ozoneDB.OzoneCompatible;
import org.ozoneDB.OzoneInterface;
import org.ozoneDB.OzoneRemoteException;
import org.ozoneDB.xml.dom4j.OzoneDocumentFactory;
import org.ozoneDB.xml.dom4j.OzoneEntity;

/**
 *
 * @author Per Nyfelt
 */
public class OzoneEntityImpl extends DefaultEntity implements OzoneEntity, OzoneCompatible {

    final static long serialVersionUID = 1L;

    private void init() {
    }

    public static OzoneEntity create(OzoneInterface db, String name) {
        return (OzoneEntity) db.createObject(OzoneEntityImpl.class,
                new Class[] {String.class},
                new Object[]{name});
    }

    /** Creates the <code>Entity</code> with the specified name
     *
     * @param name is the name of the entity
     */
    public OzoneEntityImpl(String name) {
        super(name);
        init();
    }

    public static OzoneEntity create(OzoneInterface db, String name, String text) {
        final Class[] signature = new Class[] {String.class, String.class};
        return (OzoneEntity) db.createObject(OzoneEntityImpl.class,
                signature,
                new Object[]{name, text});
    }

    /** Creates the <code>Entity</code> with the specified name
     * and text.
     *
     * @param name is the name of the entity
     * @param text is the text of the entity
     */
    public OzoneEntityImpl(String name, String text) {
        super(name, text);
        init();
    }

    public static OzoneEntity create(OzoneInterface db, Element parent, String name, String text) {
        final Class[] signature = new Class[] {Element.class, String.class, String.class};
        return (OzoneEntity) db.createObject(OzoneEntityImpl.class,
                signature,
                new Object[]{parent, name, text});
    }

    /** Creates the <code>Entity</code> with the specified name
     * and text.
     *
     * @param parent is the parent element
     * @param name is the name of the entity
     * @param text is the text of the entity
     */
    public OzoneEntityImpl(Element parent, String name, String text) {
        super(parent, name, text);
        init();
    }

    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() {
    }
}