Java tutorial
/* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2014, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, * USA. * * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. * Other names may be trademarks of their respective owners.] * * ----------------------- * DefaultOHLCDataset.java * ----------------------- * (C) Copyright 2003-2014, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * Changes * ------- * 03-Dec-2003 : Version 1 (DG); * 05-May-2004 : Now extends AbstractXYDataset (DG); * 15-Jul-2004 : Switched getX() with getXValue() and getY() with * getYValue() (DG); * 29-Apr-2005 : Added equals() method (DG); * 22-Apr-2008 : Implemented PublicCloneable, and fixed cloning bug (DG); * 17-Jun-2012 : Removed JCommon dependencies (DG); * */ package org.jfree.data.xy; import java.util.Arrays; import java.util.Date; import org.jfree.chart.util.PublicCloneable; import org.jfree.data.time.ohlc.OHLCSeriesCollection; /** * A simple implementation of the {@link OHLCDataset} interface. This * implementation supports only one series. It is recommended that you use * the {@link OHLCSeriesCollection} dataset instead. */ public class DefaultOHLCDataset extends AbstractXYDataset implements OHLCDataset, PublicCloneable { /** The series key. */ private Comparable key; /** Storage for the data items. */ private OHLCDataItem[] data; /** * Creates a new dataset. * * @param key the series key. * @param data the data items. */ public DefaultOHLCDataset(Comparable key, OHLCDataItem[] data) { this.key = key; this.data = data; } /** * Returns the series key. * * @param series the series index (ignored). * * @return The series key. */ @Override public Comparable getSeriesKey(int series) { return this.key; } /** * Returns the x-value for a data item. * * @param series the series index (ignored). * @param item the item index (zero-based). * * @return The x-value. */ @Override public Number getX(int series, int item) { return this.data[item].getDate().getTime(); } /** * Returns the x-value for a data item as a date. * * @param series the series index (ignored). * @param item the item index (zero-based). * * @return The x-value as a date. */ public Date getXDate(int series, int item) { return this.data[item].getDate(); } /** * Returns the y-value. * * @param series the series index (ignored). * @param item the item index (zero-based). * * @return The y value. */ @Override public Number getY(int series, int item) { return getClose(series, item); } /** * Returns the high value. * * @param series the series index (ignored). * @param item the item index (zero-based). * * @return The high value. */ @Override public Number getHigh(int series, int item) { return this.data[item].getHigh(); } /** * 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. */ @Override public double getHighValue(int series, int item) { double result = Double.NaN; Number high = getHigh(series, item); if (high != null) { result = high.doubleValue(); } return result; } /** * Returns the low value. * * @param series the series index (ignored). * @param item the item index (zero-based). * * @return The low value. */ @Override public Number getLow(int series, int item) { return this.data[item].getLow(); } /** * 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. */ @Override public double getLowValue(int series, int item) { double result = Double.NaN; Number low = getLow(series, item); if (low != null) { result = low.doubleValue(); } return result; } /** * Returns the open value. * * @param series the series index (ignored). * @param item the item index (zero-based). * * @return The open value. */ @Override public Number getOpen(int series, int item) { return this.data[item].getOpen(); } /** * 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. */ @Override public double getOpenValue(int series, int item) { double result = Double.NaN; Number open = getOpen(series, item); if (open != null) { result = open.doubleValue(); } return result; } /** * Returns the close value. * * @param series the series index (ignored). * @param item the item index (zero-based). * * @return The close value. */ @Override public Number getClose(int series, int item) { return this.data[item].getClose(); } /** * 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. */ @Override public double getCloseValue(int series, int item) { double result = Double.NaN; Number close = getClose(series, item); if (close != null) { result = close.doubleValue(); } return result; } /** * Returns the trading volume. * * @param series the series index (ignored). * @param item the item index (zero-based). * * @return The trading volume. */ @Override public Number getVolume(int series, int item) { return this.data[item].getVolume(); } /** * 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. */ @Override public double getVolumeValue(int series, int item) { double result = Double.NaN; Number volume = getVolume(series, item); if (volume != null) { result = volume.doubleValue(); } return result; } /** * Returns the series count. * * @return 1. */ @Override public int getSeriesCount() { return 1; } /** * Returns the item count for the specified series. * * @param series the series index (ignored). * * @return The item count. */ @Override public int getItemCount(int series) { return this.data.length; } /** * Sorts the data into ascending order by date. */ public void sortDataByDate() { Arrays.sort(this.data); } /** * Tests this instance for equality with an arbitrary object. * * @param obj the object (<code>null</code> permitted). * * @return A boolean. */ @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (!(obj instanceof DefaultOHLCDataset)) { return false; } DefaultOHLCDataset that = (DefaultOHLCDataset) obj; if (!this.key.equals(that.key)) { return false; } if (!Arrays.equals(this.data, that.data)) { return false; } return true; } /** * Returns an independent copy of this dataset. * * @return A clone. * * @throws CloneNotSupportedException if there is a problem cloning. */ @Override public Object clone() throws CloneNotSupportedException { DefaultOHLCDataset clone = (DefaultOHLCDataset) super.clone(); clone.data = new OHLCDataItem[this.data.length]; System.arraycopy(this.data, 0, clone.data, 0, this.data.length); return clone; } }