/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ----------------
 * OHLCDataset.java
 * ----------------
 * (C) Copyright 2001-2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Sylvain Vieujot;
 *
 * $Id: OHLCDataset.java,v 1.2 2004/09/08 09:14:58 mungady Exp $
 *
 * Changes (from 18-Sep-2001)
 * --------------------------
 * 18-Sep-2001 : Updated header info (DG);
 * 16-Oct-2001 : Moved to package com.jrefinery.data.* (DG);
 * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);
 * 05-Feb-2002 : Added getVolumeValue() method, as requested by Sylvain Vieujot (DG);
 * 05-May-2004 : Added methods that return double primitives (DG);
 * 26-Jul-2004 : Switched names of methods that return Number vs primitives (DG);
 * 06-Sep-2004 : Renamed HighLowDataset --> OHLCDataset (DG);
 * 
 */

package org.jfree.data.xy;

/**
 * An interface that defines data in the form of (x, high, low, open, close) tuples.
 */
public interface OHLCDataset extends XYDataset {

    /**
     * Returns the high-value for the specified series and item.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The value.
     */
    public Number getHigh(int series, int item);

    /**
     * Returns the high-value (as a double primitive) for an item within a series.
     * 
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     * 
     * @return The high-value.
     */
    public double getHighValue(int series, int item);
    
    /**
     * Returns the low-value for the specified series and item.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The value.
     */
    public Number getLow(int series, int item);

    /**
     * Returns the low-value (as a double primitive) for an item within a series.
     * 
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     * 
     * @return The low-value.
     */
    public double getLowValue(int series, int item);
    
    /**
     * Returns the open-value for the specified series and item.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The value.
     */
    public Number getOpen(int series, int item);

    /**
     * Returns the open-value (as a double primitive) for an item within a series.
     * 
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     * 
     * @return The open-value.
     */
    public double getOpenValue(int series, int item);
    
    /**
     * Returns the y-value for the specified series and item.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The value.
     */
    public Number getClose(int series, int item);

    /**
     * Returns the close-value (as a double primitive) for an item within a series.
     * 
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     * 
     * @return The close-value.
     */
    public double getCloseValue(int series, int item);
    
    /**
     * Returns the volume for the specified series and item.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The value.
     */
    public Number getVolume(int series, int item);
    
    /**
     * Returns the volume-value (as a double primitive) for an item within a series.
     * 
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     * 
     * @return The volume-value.
     */
    public double getVolumeValue(int series, int item);
    

}