row.java

开源的axion的数据库代码

/*
 * $Id: Row.java,v 1.14 2002/12/16 15:27:35 rwald Exp $
 * =======================================================================
 * Copyright (c) 2002 Axion Development Team.  All rights reserved.
 *  
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met:
 * 
 * 1. Redistributions of source code must retain the above 
 *    copyright notice, this list of conditions and the following 
 *    disclaimer. 
 *   
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in 
 *    the documentation and/or other materials provided with the 
 *    distribution. 
 *   
 * 3. The names "Tigris", "Axion", nor the names of its contributors may 
 *    not be used to endorse or promote products derived from this 
 *    software without specific prior written permission. 
 *  
 * 4. Products derived from this software may not be called "Axion", nor 
 *    may "Tigris" or "Axion" appear in their names without specific prior
 *    written permission.
 *   
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * =======================================================================
 */

package org.axiondb;

/**
 * Contains the data for a single row in a table, view, result set, etc.
 * 
 * @version $Revision: 1.14 $ $Date: 2002/12/16 15:27:35 $
 * @author Rodney Waldhoff
 */
public interface Row {
    /**
     * Returns the value of the field at <i>i</i> (zero indexed). 
     */
    public Object get(int i);

    /**
     * Sets the value of the field at <i>i</i> (zero indexed). 
     * This operation is optional.
     */
    public void set(int i, Object val) throws UnsupportedOperationException;

    /**
     * Returns the number of fields in me.
     */
    public int size();

    /**
     * Return a hash code for me, in keeping
     * with the generic {@link Object#hashCode}
     * contract.
     */
    public int hashCode();

    /**
     * Returns <code>true</code> iff <i>that</i>
     * is a <code>Row</code> with the same number of 
     * fields and each is equal to the corresponding
     * field in me.
     * <p>
     * Adheres to the generic {@link Object#equals}
     * contract.
     */
    public boolean equals(Object that);

    public int getIdentifier();
    public void setIdentifier(int id);
}