o3saxreader.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: O3SAXReader.java,v 1.1 2003/07/12 12:13:06 per_nyfelt Exp $
package org.ozoneDB.xml.dom4j.io;

import org.dom4j.DocumentFactory;
import org.dom4j.NodeFactory;
import org.dom4j.XPathFactory;
import org.dom4j.io.SAXContentHandler;
import org.dom4j.io.SAXReader;
import org.ozoneDB.OzoneInterface;
import org.ozoneDB.OzoneRemoteException;
import org.ozoneDB.xml.dom4j.OzoneDocumentFactory;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;

/**
 * $Id: O3SAXReader.java,v 1.1 2003/07/12 12:13:06 per_nyfelt Exp $
 */
public class O3SAXReader extends SAXReader {

    OzoneInterface db;

    public O3SAXReader(OzoneInterface db) {
        this.db = db;
    }

    public O3SAXReader(OzoneInterface db, boolean validating) {
        super(validating);
        this.db = db;
    }

    public O3SAXReader(OzoneInterface db, OzoneDocumentFactory factory) {
        super(factory);
        this.db = db;
    }

    public O3SAXReader(OzoneInterface db, DocumentFactory factory, boolean validating) {
        super(factory, validating);
        this.db = db;
    }

    public O3SAXReader(OzoneInterface db, XMLReader xmlReader) {
        super(xmlReader);
        this.db = db;
    }

    public O3SAXReader(OzoneInterface db, XMLReader xmlReader, boolean validating) {
        super(xmlReader, validating);
        this.db = db;
    }

    public O3SAXReader(OzoneInterface db, String xmlReaderClassName) throws SAXException {
        super(xmlReaderClassName);
        this.db = db;
    }

    public O3SAXReader(OzoneInterface db, String xmlReaderClassName, boolean validating) throws SAXException {
        super(xmlReaderClassName, validating);
        this.db = db;
    }

/*    public DocumentFactory getDocumentFactory() {
        try {
            System.out.println("[O3SAXReader] getting factory for db " + db);
            return OzoneDocumentFactoryImpl.getInstance(db);
        } catch (Exception e) {
            e.printStackTrace();
            throw new OzoneRemoteException("Documentfactory not registered" + e.toString());
        }
    }*/

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

    /** Factory Method to allow user derived SAXContentHandler objects to be used
     * overridden since the super class is still using the deprecated getDocumentFactory()
     */
    protected SAXContentHandler createContentHandler(XMLReader reader) {
        return new SAXContentHandler(
                getNodeFactory(), getDispatchHandler()
        );
    }

    public 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) db.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) db.objectForName(OzoneDocumentFactory.OBJECT_NAME);
        } catch (Exception e) {
            throw new OzoneRemoteException("XPathFactory not registered" + e.toString());
        }
    }

}