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<HTML><BODY BGCOLOR="white"><PRE><FONT color="green">001</FONT> /* ===========================================================<a name="line.1"></a><FONT color="green">002</FONT> * JFreeChart : a free chart library for the Java(tm) platform<a name="line.2"></a><FONT color="green">003</FONT> * ===========================================================<a name="line.3"></a><FONT color="green">004</FONT> *<a name="line.4"></a><FONT color="green">005</FONT> * (C) Copyright 2000-2006, by Object Refinery Limited and Contributors.<a name="line.5"></a><FONT color="green">006</FONT> *<a name="line.6"></a><FONT color="green">007</FONT> * Project Info: http://www.jfree.org/jfreechart/index.html<a name="line.7"></a><FONT color="green">008</FONT> *<a name="line.8"></a><FONT color="green">009</FONT> * This library is free software; you can redistribute it and/or modify it <a name="line.9"></a><FONT color="green">010</FONT> * under the terms of the GNU Lesser General Public License as published by <a name="line.10"></a><FONT color="green">011</FONT> * the Free Software Foundation; either version 2.1 of the License, or <a name="line.11"></a><FONT color="green">012</FONT> * (at your option) any later version.<a name="line.12"></a><FONT color="green">013</FONT> *<a name="line.13"></a><FONT color="green">014</FONT> * This library is distributed in the hope that it will be useful, but <a name="line.14"></a><FONT color="green">015</FONT> * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY <a name="line.15"></a><FONT color="green">016</FONT> * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public <a name="line.16"></a><FONT color="green">017</FONT> * License for more details.<a name="line.17"></a><FONT color="green">018</FONT> *<a name="line.18"></a><FONT color="green">019</FONT> * You should have received a copy of the GNU Lesser General Public<a name="line.19"></a><FONT color="green">020</FONT> * License along with this library; if not, write to the Free Software<a name="line.20"></a><FONT color="green">021</FONT> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, <a name="line.21"></a><FONT color="green">022</FONT> * USA. <a name="line.22"></a><FONT color="green">023</FONT> *<a name="line.23"></a><FONT color="green">024</FONT> * [Java is a trademark or registered trademark of Sun Microsystems, Inc. <a name="line.24"></a><FONT color="green">025</FONT> * in the United States and other countries.]<a name="line.25"></a><FONT color="green">026</FONT> *<a name="line.26"></a><FONT color="green">027</FONT> * ---------------------<a name="line.27"></a><FONT color="green">028</FONT> * DatasetUtilities.java<a name="line.28"></a><FONT color="green">029</FONT> * ---------------------<a name="line.29"></a><FONT color="green">030</FONT> * (C) Copyright 2000-2006, by Object Refinery Limited and Contributors.<a name="line.30"></a><FONT color="green">031</FONT> *<a name="line.31"></a><FONT color="green">032</FONT> * Original Author: David Gilbert (for Object Refinery Limited);<a name="line.32"></a><FONT color="green">033</FONT> * Contributor(s): Andrzej Porebski (bug fix);<a name="line.33"></a><FONT color="green">034</FONT> * Jonathan Nash (bug fix);<a name="line.34"></a><FONT color="green">035</FONT> * Richard Atkinson;<a name="line.35"></a><FONT color="green">036</FONT> * Andreas Schroeder (beatification)<a name="line.36"></a><FONT color="green">037</FONT> *<a name="line.37"></a><FONT color="green">038</FONT> * $Id: DatasetUtilities.java,v 1.18.2.4 2006/08/02 15:27:14 mungady Exp $<a name="line.38"></a><FONT color="green">039</FONT> *<a name="line.39"></a><FONT color="green">040</FONT> * Changes (from 18-Sep-2001)<a name="line.40"></a><FONT color="green">041</FONT> * --------------------------<a name="line.41"></a><FONT color="green">042</FONT> * 18-Sep-2001 : Added standard header and fixed DOS encoding problem (DG);<a name="line.42"></a><FONT color="green">043</FONT> * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);<a name="line.43"></a><FONT color="green">044</FONT> * 15-Nov-2001 : Moved to package com.jrefinery.data.* in the JCommon class <a name="line.44"></a><FONT color="green">045</FONT> * library (DG);<a name="line.45"></a><FONT color="green">046</FONT> * Changed to handle null values from datasets (DG);<a name="line.46"></a><FONT color="green">047</FONT> * Bug fix (thanks to Andrzej Porebski) - initial value now set <a name="line.47"></a><FONT color="green">048</FONT> * to positive or negative infinity when iterating (DG);<a name="line.48"></a><FONT color="green">049</FONT> * 22-Nov-2001 : Datasets with containing no data now return null for min and <a name="line.49"></a><FONT color="green">050</FONT> * max calculations (DG);<a name="line.50"></a><FONT color="green">051</FONT> * 13-Dec-2001 : Extended to handle HighLowDataset and IntervalXYDataset (DG);<a name="line.51"></a><FONT color="green">052</FONT> * 15-Feb-2002 : Added getMinimumStackedRangeValue() and <a name="line.52"></a><FONT color="green">053</FONT> * getMaximumStackedRangeValue() (DG);<a name="line.53"></a><FONT color="green">054</FONT> * 28-Feb-2002 : Renamed Datasets.java --> DatasetUtilities.java (DG);<a name="line.54"></a><FONT color="green">055</FONT> * 18-Mar-2002 : Fixed bug in min/max domain calculation for datasets that <a name="line.55"></a><FONT color="green">056</FONT> * implement the CategoryDataset interface AND the XYDataset <a name="line.56"></a><FONT color="green">057</FONT> * interface at the same time. Thanks to Jonathan Nash for the <a name="line.57"></a><FONT color="green">058</FONT> * fix (DG);<a name="line.58"></a><FONT color="green">059</FONT> * 23-Apr-2002 : Added getDomainExtent() and getRangeExtent() methods (DG);<a name="line.59"></a><FONT color="green">060</FONT> * 13-Jun-2002 : Modified range measurements to handle <a name="line.60"></a><FONT color="green">061</FONT> * IntervalCategoryDataset (DG);<a name="line.61"></a><FONT color="green">062</FONT> * 12-Jul-2002 : Method name change in DomainInfo interface (DG);<a name="line.62"></a><FONT color="green">063</FONT> * 30-Jul-2002 : Added pie dataset summation method (DG);<a name="line.63"></a><FONT color="green">064</FONT> * 01-Oct-2002 : Added a method for constructing an XYDataset from a Function2D<a name="line.64"></a><FONT color="green">065</FONT> * instance (DG);<a name="line.65"></a><FONT color="green">066</FONT> * 24-Oct-2002 : Amendments required following changes to the CategoryDataset <a name="line.66"></a><FONT color="green">067</FONT> * interface (DG);<a name="line.67"></a><FONT color="green">068</FONT> * 18-Nov-2002 : Changed CategoryDataset to TableDataset (DG);<a name="line.68"></a><FONT color="green">069</FONT> * 04-Mar-2003 : Added isEmpty(XYDataset) method (DG);<a name="line.69"></a><FONT color="green">070</FONT> * 05-Mar-2003 : Added a method for creating a CategoryDataset from a <a name="line.70"></a><FONT color="green">071</FONT> * KeyedValues instance (DG);<a name="line.71"></a><FONT color="green">072</FONT> * 15-May-2003 : Renamed isEmpty --> isEmptyOrNull (DG);<a name="line.72"></a><FONT color="green">073</FONT> * 25-Jun-2003 : Added limitPieDataset methods (RA);<a name="line.73"></a><FONT color="green">074</FONT> * 26-Jun-2003 : Modified getDomainExtent() method to accept null datasets (DG);<a name="line.74"></a><FONT color="green">075</FONT> * 27-Jul-2003 : Added getStackedRangeExtent(TableXYDataset data) (RA);<a name="line.75"></a><FONT color="green">076</FONT> * 18-Aug-2003 : getStackedRangeExtent(TableXYDataset data) now handles null <a name="line.76"></a><FONT color="green">077</FONT> * values (RA);<a name="line.77"></a><FONT color="green">078</FONT> * 02-Sep-2003 : Added method to check for null or empty PieDataset (DG);<a name="line.78"></a><FONT color="green">079</FONT> * 18-Sep-2003 : Fix for bug 803660 (getMaximumRangeValue for <a name="line.79"></a><FONT color="green">080</FONT> * CategoryDataset) (DG);<a name="line.80"></a><FONT color="green">081</FONT> * 20-Oct-2003 : Added getCumulativeRangeExtent() method (DG);<a name="line.81"></a><FONT color="green">082</FONT> * 09-Jan-2003 : Added argument checking code to the createCategoryDataset() <a name="line.82"></a><FONT color="green">083</FONT> * method (DG);<a name="line.83"></a><FONT color="green">084</FONT> * 23-Mar-2004 : Fixed bug in getMaximumStackedRangeValue() method (DG);<a name="line.84"></a><FONT color="green">085</FONT> * 31-Mar-2004 : Exposed the extent iteration algorithms to use one of them and <a name="line.85"></a><FONT color="green">086</FONT> * applied noninstantiation pattern (AS);<a name="line.86"></a><FONT color="green">087</FONT> * 11-May-2004 : Renamed getPieDatasetTotal --> calculatePieDatasetTotal (DG);<a name="line.87"></a><FONT color="green">088</FONT> * 15-Jul-2004 : Switched getX() with getXValue() and getY() with getYValue();<a name="line.88"></a><FONT color="green">089</FONT> * 24-Aug-2004 : Added argument checks to createCategoryDataset() method (DG);<a name="line.89"></a><FONT color="green">090</FONT> * 04-Oct-2004 : Renamed ArrayUtils --> ArrayUtilities (DG);<a name="line.90"></a><FONT color="green">091</FONT> * 06-Oct-2004 : Renamed findDomainExtent() --> findDomainBounds(),<a name="line.91"></a><FONT color="green">092</FONT> * findRangeExtent() --> findRangeBounds() (DG);<a name="line.92"></a><FONT color="green">093</FONT> * 07-Jan-2005 : Renamed findStackedRangeExtent() --> findStackedRangeBounds(),<a name="line.93"></a><FONT color="green">094</FONT> * findCumulativeRangeExtent() --> findCumulativeRangeBounds(),<a name="line.94"></a><FONT color="green">095</FONT> * iterateXYRangeExtent() --> iterateXYRangeBounds(), <a name="line.95"></a><FONT color="green">096</FONT> * removed deprecated methods (DG);<a name="line.96"></a><FONT color="green">097</FONT> * 03-Feb-2005 : The findStackedRangeBounds() methods now return null for <a name="line.97"></a><FONT color="green">098</FONT> * empty datasets (DG);<a name="line.98"></a><FONT color="green">099</FONT> * 03-Mar-2005 : Moved createNumberArray() and createNumberArray2D() methods<a name="line.99"></a><FONT color="green">100</FONT> * from DatasetUtilities --> DataUtilities (DG);<a name="line.100"></a><FONT color="green">101</FONT> * 22-Sep-2005 : Added new findStackedRangeBounds() method that takes base<a name="line.101"></a><FONT color="green">102</FONT> * argument (DG);<a name="line.102"></a><FONT color="green">103</FONT> * <a name="line.103"></a><FONT color="green">104</FONT> */<a name="line.104"></a><FONT color="green">105</FONT> <a name="line.105"></a><FONT color="green">106</FONT> package org.jfree.data.general;<a name="line.106"></a><FONT color="green">107</FONT> <a name="line.107"></a><FONT color="green">108</FONT> import java.util.ArrayList;<a name="line.108"></a><FONT color="green">109</FONT> import java.util.Iterator;<a name="line.109"></a><FONT color="green">110</FONT> import java.util.List;<a name="line.110"></a><FONT color="green">111</FONT> <a name="line.111"></a><FONT color="green">112</FONT> import org.jfree.data.DomainInfo;<a name="line.112"></a><FONT color="green">113</FONT> import org.jfree.data.KeyToGroupMap;<a name="line.113"></a><FONT color="green">114</FONT> import org.jfree.data.KeyedValues;<a name="line.114"></a><FONT color="green">115</FONT> import org.jfree.data.Range;<a name="line.115"></a><FONT color="green">116</FONT> import org.jfree.data.RangeInfo;<a name="line.116"></a><FONT color="green">117</FONT> import org.jfree.data.category.CategoryDataset;<a name="line.117"></a><FONT color="green">118</FONT> import org.jfree.data.category.DefaultCategoryDataset;<a name="line.118"></a><FONT color="green">119</FONT> import org.jfree.data.category.IntervalCategoryDataset;<a name="line.119"></a><FONT color="green">120</FONT> import org.jfree.data.function.Function2D;<a name="line.120"></a><FONT color="green">121</FONT> import org.jfree.data.xy.OHLCDataset;<a name="line.121"></a><FONT color="green">122</FONT> import org.jfree.data.xy.IntervalXYDataset;<a name="line.122"></a><FONT color="green">123</FONT> import org.jfree.data.xy.TableXYDataset;<a name="line.123"></a><FONT color="green">124</FONT> import org.jfree.data.xy.XYDataset;<a name="line.124"></a><FONT color="green">125</FONT> import org.jfree.data.xy.XYSeries;<a name="line.125"></a><FONT color="green">126</FONT> import org.jfree.data.xy.XYSeriesCollection;<a name="line.126"></a><FONT color="green">127</FONT> import org.jfree.util.ArrayUtilities;<a name="line.127"></a><FONT color="green">128</FONT> <a name="line.128"></a><FONT color="green">129</FONT> /**<a name="line.129"></a><FONT color="green">130</FONT> * A collection of useful static methods relating to datasets.<a name="line.130"></a><FONT color="green">131</FONT> */<a name="line.131"></a><FONT color="green">132</FONT> public final class DatasetUtilities {<a name="line.132"></a><FONT color="green">133</FONT> <a name="line.133"></a><FONT color="green">134</FONT> /**<a name="line.134"></a>⌨️ 快捷键说明
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