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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> * DefaultPieDataset.java<a name="line.28"></a><FONT color="green">029</FONT> * ----------------------<a name="line.29"></a><FONT color="green">030</FONT> * (C) Copyright 2001-2006, by Object Refinery Limited.<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): Sam (oldman);<a name="line.33"></a><FONT color="green">034</FONT> *<a name="line.34"></a><FONT color="green">035</FONT> * $Id: DefaultPieDataset.java,v 1.6.2.4 2006/08/01 14:35:38 mungady Exp $<a name="line.35"></a><FONT color="green">036</FONT> *<a name="line.36"></a><FONT color="green">037</FONT> * Changes<a name="line.37"></a><FONT color="green">038</FONT> * -------<a name="line.38"></a><FONT color="green">039</FONT> * 17-Nov-2001 : Version 1 (DG);<a name="line.39"></a><FONT color="green">040</FONT> * 22-Jan-2002 : Removed legend methods from dataset implementations (DG);<a name="line.40"></a><FONT color="green">041</FONT> * 07-Apr-2002 : Modified implementation to guarantee data sequence to remain <a name="line.41"></a><FONT color="green">042</FONT> * in the order categories are added (oldman);<a name="line.42"></a><FONT color="green">043</FONT> * 23-Oct-2002 : Added getCategory(int) method and getItemCount() method, in <a name="line.43"></a><FONT color="green">044</FONT> * line with changes to the PieDataset interface (DG);<a name="line.44"></a><FONT color="green">045</FONT> * 04-Feb-2003 : Changed underlying data storage to DefaultKeyedValues (DG);<a name="line.45"></a><FONT color="green">046</FONT> * 04-Mar-2003 : Inserted DefaultKeyedValuesDataset class into hierarchy (DG);<a name="line.46"></a><FONT color="green">047</FONT> * 24-Apr-2003 : Switched places with DefaultKeyedValuesDataset (DG);<a name="line.47"></a><FONT color="green">048</FONT> * 18-Aug-2003 : Implemented Cloneable (DG);<a name="line.48"></a><FONT color="green">049</FONT> * 03-Mar-2005 : Implemented PublicCloneable (DG);<a name="line.49"></a><FONT color="green">050</FONT> * 29-Jun-2005 : Added remove() method (DG);<a name="line.50"></a><FONT color="green">051</FONT> * ------------- JFREECHART 1.0.0 ---------------------------------------------<a name="line.51"></a><FONT color="green">052</FONT> * 31-Jul-2006 : Added a clear() method to clear all values from the <a name="line.52"></a><FONT color="green">053</FONT> * dataset (DG);<a name="line.53"></a><FONT color="green">054</FONT> * <a name="line.54"></a><FONT color="green">055</FONT> */<a name="line.55"></a><FONT color="green">056</FONT> <a name="line.56"></a><FONT color="green">057</FONT> package org.jfree.data.general;<a name="line.57"></a><FONT color="green">058</FONT> <a name="line.58"></a><FONT color="green">059</FONT> import java.io.Serializable;<a name="line.59"></a><FONT color="green">060</FONT> import java.util.Collections;<a name="line.60"></a><FONT color="green">061</FONT> import java.util.List;<a name="line.61"></a><FONT color="green">062</FONT> <a name="line.62"></a><FONT color="green">063</FONT> import org.jfree.data.DefaultKeyedValues;<a name="line.63"></a><FONT color="green">064</FONT> import org.jfree.data.KeyedValues;<a name="line.64"></a><FONT color="green">065</FONT> import org.jfree.data.UnknownKeyException;<a name="line.65"></a><FONT color="green">066</FONT> import org.jfree.util.PublicCloneable;<a name="line.66"></a><FONT color="green">067</FONT> <a name="line.67"></a><FONT color="green">068</FONT> /**<a name="line.68"></a><FONT color="green">069</FONT> * A default implementation of the {@link PieDataset} interface.<a name="line.69"></a><FONT color="green">070</FONT> */<a name="line.70"></a><FONT color="green">071</FONT> public class DefaultPieDataset extends AbstractDataset<a name="line.71"></a><FONT color="green">072</FONT> implements PieDataset, <a name="line.72"></a><FONT color="green">073</FONT> Cloneable, PublicCloneable, <a name="line.73"></a><FONT color="green">074</FONT> Serializable {<a name="line.74"></a><FONT color="green">075</FONT> <a name="line.75"></a><FONT color="green">076</FONT> /** For serialization. */<a name="line.76"></a><FONT color="green">077</FONT> private static final long serialVersionUID = 2904745139106540618L;<a name="line.77"></a><FONT color="green">078</FONT> <a name="line.78"></a><FONT color="green">079</FONT> /** Storage for the data. */<a name="line.79"></a><FONT color="green">080</FONT> private DefaultKeyedValues data;<a name="line.80"></a><FONT color="green">081</FONT> <a name="line.81"></a><FONT color="green">082</FONT> /**<a name="line.82"></a><FONT color="green">083</FONT> * Constructs a new dataset, initially empty.<a name="line.83"></a><FONT color="green">084</FONT> */<a name="line.84"></a><FONT color="green">085</FONT> public DefaultPieDataset() {<a name="line.85"></a><FONT color="green">086</FONT> this.data = new DefaultKeyedValues();<a name="line.86"></a><FONT color="green">087</FONT> }<a name="line.87"></a><FONT color="green">088</FONT> <a name="line.88"></a><FONT color="green">089</FONT> /**<a name="line.89"></a><FONT color="green">090</FONT> * Creates a new dataset by copying data from a {@link KeyedValues} <a name="line.90"></a><FONT color="green">091</FONT> * instance.<a name="line.91"></a><FONT color="green">092</FONT> *<a name="line.92"></a><FONT color="green">093</FONT> * @param data the data (<code>null</code> not permitted).<a name="line.93"></a><FONT color="green">094</FONT> */<a name="line.94"></a><FONT color="green">095</FONT> public DefaultPieDataset(KeyedValues data) {<a name="line.95"></a><FONT color="green">096</FONT> if (data == null) {<a name="line.96"></a><FONT color="green">097</FONT> throw new IllegalArgumentException("Null 'data' argument."); <a name="line.97"></a><FONT color="green">098</FONT> }<a name="line.98"></a><FONT color="green">099</FONT> this.data = new DefaultKeyedValues();<a name="line.99"></a><FONT color="green">100</FONT> for (int i = 0; i < data.getItemCount(); i++) {<a name="line.100"></a><FONT color="green">101</FONT> this.data.addValue(data.getKey(i), data.getValue(i));<a name="line.101"></a><FONT color="green">102</FONT> }<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> * Returns the number of items in the dataset.<a name="line.106"></a><FONT color="green">107</FONT> *<a name="line.107"></a><FONT color="green">108</FONT> * @return The item count.<a name="line.108"></a><FONT color="green">109</FONT> */<a name="line.109"></a><FONT color="green">110</FONT> public int getItemCount() {<a name="line.110"></a><FONT color="green">111</FONT> return this.data.getItemCount();<a name="line.111"></a><FONT color="green">112</FONT> }<a name="line.112"></a><FONT color="green">113</FONT> <a name="line.113"></a><FONT color="green">114</FONT> /**<a name="line.114"></a><FONT color="green">115</FONT> * Returns the categories in the dataset. The returned list is <a name="line.115"></a><FONT color="green">116</FONT> * unmodifiable.<a name="line.116"></a><FONT color="green">117</FONT> *<a name="line.117"></a><FONT color="green">118</FONT> * @return The categories in the dataset.<a name="line.118"></a><FONT color="green">119</FONT> */<a name="line.119"></a><FONT color="green">120</FONT> public List getKeys() {<a name="line.120"></a><FONT color="green">121</FONT> return Collections.unmodifiableList(this.data.getKeys());<a name="line.121"></a><FONT color="green">122</FONT> }<a name="line.122"></a><FONT color="green">123</FONT> <a name="line.123"></a><FONT color="green">124</FONT> /**<a name="line.124"></a><FONT color="green">125</FONT> * Returns the key for the specified item, or <code>null</code>. <a name="line.125"></a><FONT color="green">126</FONT> *<a name="line.126"></a><FONT color="green">127</FONT> * @param item the item index (in the range <code>0</code> to <a name="line.127"></a><FONT color="green">128</FONT> * <code>getItemCount() - 1</code>).<a name="line.128"></a><FONT color="green">129</FONT> *<a name="line.129"></a><FONT color="green">130</FONT> * @return The key, or <code>null</code>.<a name="line.130"></a><FONT color="green">131</FONT> * <a name="line.131"></a><FONT color="green">132</FONT> * @throws IndexOutOfBoundsException if <code>item</code> is not in the<a name="line.132"></a><FONT color="green">133</FONT> * specified range.<a name="line.133"></a><FONT color="green">134</FONT> */<a name="line.134"></a><FONT color="green">135</FONT> public Comparable getKey(int item) {<a name="line.135"></a><FONT color="green">136</FONT> return this.data.getKey(item);<a name="line.136"></a><FONT color="green">137</FONT> }<a name="line.137"></a><FONT color="green">138</FONT> <a name="line.138"></a><FONT color="green">139</FONT> /**<a name="line.139"></a><FONT color="green">140</FONT> * Returns the index for a key, or -1 if the key is not recognised.<a name="line.140"></a><FONT color="green">141</FONT> *<a name="line.141"></a><FONT color="green">142</FONT> * @param key the key (<code>null</code> not permitted).<a name="line.142"></a><FONT color="green">143</FONT> *<a name="line.143"></a><FONT color="green">144</FONT> * @return The index, or <code>-1</code> if the key is unrecognised.<a name="line.144"></a><FONT color="green">145</FONT> * <a name="line.145"></a><FONT color="green">146</FONT> * @throws IllegalArgumentException if <code>key</code> is <a name="line.146"></a><FONT color="green">147</FONT> * <code>null</code>.<a name="line.147"></a><FONT color="green">148</FONT> */<a name="line.148"></a><FONT color="green">149</FONT> public int getIndex(Comparable key) {<a name="line.149"></a><FONT color="green">150</FONT> return this.data.getIndex(key);<a name="line.150"></a><FONT color="green">151</FONT> }<a name="line.151"></a><FONT color="green">152</FONT> <a name="line.152"></a><FONT color="green">153</FONT> /**<a name="line.153"></a><FONT color="green">154</FONT> * Returns a value.<a name="line.154"></a><FONT color="green">155</FONT> *<a name="line.155"></a><FONT color="green">156</FONT> * @param item the value index.<a name="line.156"></a><FONT color="green">157</FONT> *<a name="line.157"></a><FONT color="green">158</FONT> * @return The value (possibly <code>null</code>).<a name="line.158"></a><FONT color="green">159</FONT> */<a name="line.159"></a><FONT color="green">160</FONT> public Number getValue(int item) {<a name="line.160"></a><FONT color="green">161</FONT> <a name="line.161"></a><FONT color="green">162</FONT> Number result = null;<a name="line.162"></a><FONT color="green">163</FONT> if (getItemCount() > item) {<a name="line.163"></a><FONT color="green">164</FONT> result = this.data.getValue(item);<a name="line.164"></a><FONT color="green">165</FONT> }<a name="line.165"></a><FONT color="green">166</FONT> return result;<a name="line.166"></a><FONT color="green">167</FONT> <a name="line.167"></a><FONT color="green">168</FONT> }<a name="line.168"></a><FONT color="green">169</FONT> <a name="line.169"></a><FONT color="green">170</FONT> /**<a name="line.170"></a><FONT color="green">171</FONT> * Returns the data value associated with a key.<a name="line.171"></a><FONT color="green">172</FONT> *<a name="line.172"></a><FONT color="green">173</FONT> * @param key the key (<code>null</code> not permitted).<a name="line.173"></a><FONT color="green">174</FONT> *<a name="line.174"></a><FONT color="green">175</FONT> * @return The value (possibly <code>null</code>).<a name="line.175"></a><FONT color="green">176</FONT> * <a name="line.176"></a><FONT color="green">177</FONT> * @throws UnknownKeyException if the key is not recognised.<a name="line.177"></a><FONT color="green">178</FONT> */<a name="line.178"></a><FONT color="green">179</FONT> public Number getValue(Comparable key) {<a name="line.179"></a><FONT color="green">180</FONT> if (key == null) {<a name="line.180"></a><FONT color="green">181</FONT> throw new IllegalArgumentException("Null 'key' argument.");<a name="line.181"></a><FONT color="green">182</FONT> }<a name="line.182"></a><FONT color="green">183</FONT> return this.data.getValue(key);<a name="line.183"></a><FONT color="green">184</FONT> }<a name="line.184"></a><FONT color="green">185</FONT> <a name="line.185"></a><FONT color="green">186</FONT> /**<a name="line.186"></a>⌨️ 快捷键说明
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