ozonedocumentimpl.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: OzoneDocumentImpl.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.OzoneRemote;
import org.ozoneDB.OzoneRemoteException;
import org.ozoneDB.xml.dom4j.OzoneBranch;
import org.ozoneDB.xml.dom4j.OzoneDocument;
import org.ozoneDB.xml.dom4j.OzoneDocumentFactory;

import java.util.Iterator;
import java.util.List;

/**
 *
 * @author Per Nyfelt
 */
public class OzoneDocumentImpl extends DefaultDocument implements OzoneDocument, OzoneCompatible {

    final static long serialVersionUID = 1L;

    private void init() {
    }

    public static OzoneDocument create(OzoneInterface db) {
        return (OzoneDocument) db.createObject(OzoneDocumentImpl.class);
    }

    public OzoneDocumentImpl() {
        init();
    }

    /** creates a named Document. Document name and object name should
     * be the same here i think
     **/
    public static OzoneDocument create(OzoneInterface db, String name) {
        return (OzoneDocument) db.createObject(OzoneDocumentImpl.class,
                OzoneInterface.Public,
                name,
                new Class[] {String.class},
                new Object[]{name});
    }

    public OzoneDocumentImpl(String name) {
        super(name);
        init();
    }

    public static OzoneDocument create(OzoneInterface db, Element rootElement) {
        return (OzoneDocument) db.createObject(OzoneDocumentImpl.class,
                new Class[] {Element.class},
                new Object[]{rootElement});
    }

    public OzoneDocumentImpl(Element rootElement) {
        super(rootElement);
        init();
    }


    public static OzoneDocument create(OzoneInterface db, DocumentType docType) {
        return (OzoneDocument) db.createObject(OzoneDocumentImpl.class,
                new Class[] {DocumentType.class},
                new Object[]{docType});
    }

    public OzoneDocumentImpl(DocumentType docType) {
        super(docType);
        init();
    }

    public static OzoneDocument create(OzoneInterface db, Element rootElement, DocumentType docType) {
        final Class[] signature = new Class[] {Element.class, DocumentType.class};
        return (OzoneDocument) db.createObject(OzoneDocumentImpl.class,
                signature,
                new Object[]{rootElement, docType});
    }

    public OzoneDocumentImpl(Element rootElement, DocumentType docType) {
        super(rootElement, docType);
        init();
    }

    public static OzoneDocument create(OzoneInterface db, String name, Element rootElement, DocumentType docType) {
        final Class[] signature = new Class[] {Element.class, DocumentType.class, String.class};
        return (OzoneDocument) db.createObject(OzoneDocumentImpl.class,
                signature,
                new Object[]{name, rootElement, docType});
    }

    public OzoneDocumentImpl(String name, Element rootElement, DocumentType docType) {
        super(name, rootElement, docType);
        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 List content() {
        List backingList = contentList();
        return new O3ContentListFacade((OzoneBranch) self(), backingList);
    }

    /** Called when an invalid node has been added.
     * Throws an {@link org.dom4j.IllegalAddException}.
     */
    public void invalidNodeTypeAddException(Node node) {
        super.invalidNodeTypeAddException(node);
    }

    /** Called when the given List content has been removed so
     * each node should have its parent and document relationships
     * cleared
     */
    public void contentRemoved() {
        super.contentRemoved();
    }

    /** @return the text value of the given content object
     * as text which returns the text value of CDATA, Entity or Text nodes
     */
    public String getContentAsText(Object content) {
        return super.getContentAsText(content);
    }

    /** @return the XPath defined string-value of the given content object
     */
    public String getContentAsStringValue(Object content) {
        return super.getContentAsStringValue(content);
    }

    /** @return the ID of the given <code>Element</code>
     */
    public String elementID(Element element) {
        return super.elementID(element);
    }

    /** A Factory Method pattern which creates
     * a List implementation used to store content
     */
    public List createContentList() {
        return super.createContentList();
    }

    /** A Factory Method pattern which creates
     * a List implementation used to store content
     */
    public List createContentList(int size) {
        return super.createContentList(size);
    }

    /** A Factory Method pattern which creates
     * a BackedList implementation used to store results of
     * a filtered content query.     */
    public BackedList createResultList() {
        return super.createResultList();
    }

    /** A Factory Method pattern which creates
     * a BackedList implementation which contains a single result
     */
    public List createSingleResultList(Object result) {
        return super.createSingleResultList(result);
    }

    /** A Factory Method pattern which creates an empty
     * a BackedList implementation
     */
    public List createEmptyList() {
        return super.createEmptyList();
    }

    public void childRemoved(Node node) {
        super.childRemoved(node);
    }

    public void childAdded(Node node) {
        super.childAdded(node);
    }

    public boolean removeNode(Node node) {
        return super.removeNode(node);
    }

    public void addNode(Node node) {
        super.addNode(node);
    }

    public List contentList() {
        return super.contentList();
    }

    public void addNode(int index, Node node) {
        super.addNode(index, node);
    }

    public Object clone() {
        try {
            System.out.println("OzoneDocumentImpl, cloning...");
            // first get a copy of the document
            Document document = (Document) database().copyObject(self());
            // now we need to copy the content, otherwist all the content would be
            // referenced fromn both documents
            document.setRootElement(null);
            document.setContent(null);
            document.appendContent((Document) self());
            return document;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public void onCreate() {
    }

    public void onActivate() {
    }

    public void onPassivate() {
    }

    public void onDelete() {
        OzoneInterface db = database();
        DocumentType docType = getDocType();
        if (docType != null && docType instanceof OzoneRemote) {
            System.out.println("deleting doctype " + docType);
            db.deleteObject((OzoneRemote) docType);
        }
        List contentList = content();
        Object content;
        for (Iterator it = contentList.iterator(); it.hasNext();) {
            content = it.next();
            if (content instanceof OzoneRemote) {
                db.deleteObject((OzoneRemote) content);
            }
        }
    }

}