transactiondata.java

用Java写的面相对象的数据库管理系统

// You can redistribute this software and/or modify it under the terms of
// the Ozone Core License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-2000 by SMB GmbH. All rights reserved.
//
// $Id: TransactionData.java,v 1.8 2000/10/28 16:55:18 daniela Exp $

package org.ozoneDB.core.wizardStore;

import org.ozoneDB.core.*;
import org.ozoneDB.util.*;
import org.ozoneDB.DxLib.*;


/**
 * @author <a href="http://www.softwarebuero.de/">SMB</a>
 * @version $Revision: 1.8 $Date: 2000/10/28 16:55:18 $
 */
final class TransactionData {
    
    public final static int DEFAULT_TABLE_SIZE = 1024;
    
    protected ClusterID lrucid;
    
    protected DxMap idTable;
    
    // initialized by WizardStore.nameContainer() if needed
    protected DxMap nameTable;
    
    protected DxSet commitClusterIDs;
    
    private DxDeque idTableChanges;
    
    private DxDeque nameTableChanges;
    
    
    public TransactionData() {
        idTable = new DxHashMap( DEFAULT_TABLE_SIZE );
    }
    
    
    public void nameTableChanges_push( NameTableChange change ) {
        if (nameTableChanges == null) {
            nameTableChanges = new DxArrayDeque( DEFAULT_TABLE_SIZE );
        } 
        nameTableChanges.push( change );
    } 
    
    
    public NameTableChange nameTableChanges_pop() {
        return nameTableChanges != null ? (NameTableChange)nameTableChanges.pop() : null;
    } 
    
    
    public void idTableChanges_push( IDTableChange change ) {
        if (idTableChanges == null) {
            idTableChanges = new DxArrayDeque( DEFAULT_TABLE_SIZE );
        } 
        idTableChanges.push( change );
    } 
    
    
    public IDTableChange idTableChanges_pop() {
        return idTableChanges != null ? (IDTableChange)idTableChanges.pop() : null;
    } 
}