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commons-math-2.1 added
author dwinter
date Tue, 04 Jan 2011 10:02:07 +0100
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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    <a name="line.17"></a>
<FONT color="green">018</FONT>    package org.apache.commons.math.util;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    import java.io.Serializable;<a name="line.20"></a>
<FONT color="green">021</FONT>    <a name="line.21"></a>
<FONT color="green">022</FONT>    import org.apache.commons.math.MathException;<a name="line.22"></a>
<FONT color="green">023</FONT>    <a name="line.23"></a>
<FONT color="green">024</FONT>    /**<a name="line.24"></a>
<FONT color="green">025</FONT>     * A Default NumberTransformer for java.lang.Numbers and Numeric Strings. This<a name="line.25"></a>
<FONT color="green">026</FONT>     * provides some simple conversion capabilities to turn any java.lang.Number<a name="line.26"></a>
<FONT color="green">027</FONT>     * into a primitive double or to turn a String representation of a Number into<a name="line.27"></a>
<FONT color="green">028</FONT>     * a double.<a name="line.28"></a>
<FONT color="green">029</FONT>     *<a name="line.29"></a>
<FONT color="green">030</FONT>     * @version $Revision: 811685 $ $Date: 2009-09-05 13:36:48 -0400 (Sat, 05 Sep 2009) $<a name="line.30"></a>
<FONT color="green">031</FONT>     */<a name="line.31"></a>
<FONT color="green">032</FONT>    public class DefaultTransformer implements NumberTransformer, Serializable {<a name="line.32"></a>
<FONT color="green">033</FONT>    <a name="line.33"></a>
<FONT color="green">034</FONT>        /** Serializable version identifier */<a name="line.34"></a>
<FONT color="green">035</FONT>        private static final long serialVersionUID = 4019938025047800455L;<a name="line.35"></a>
<FONT color="green">036</FONT>    <a name="line.36"></a>
<FONT color="green">037</FONT>        /**<a name="line.37"></a>
<FONT color="green">038</FONT>         * @param o  the object that gets transformed.<a name="line.38"></a>
<FONT color="green">039</FONT>         * @return a double primitive representation of the Object o.<a name="line.39"></a>
<FONT color="green">040</FONT>         * @throws org.apache.commons.math.MathException If it cannot successfully<a name="line.40"></a>
<FONT color="green">041</FONT>         * be transformed or is null.<a name="line.41"></a>
<FONT color="green">042</FONT>         * @see &lt;a href="http://commons.apache.org/collections/api-release/org/apache/commons/collections/Transformer.html"/&gt;<a name="line.42"></a>
<FONT color="green">043</FONT>         */<a name="line.43"></a>
<FONT color="green">044</FONT>        public double transform(Object o) throws MathException{<a name="line.44"></a>
<FONT color="green">045</FONT>    <a name="line.45"></a>
<FONT color="green">046</FONT>            if (o == null) {<a name="line.46"></a>
<FONT color="green">047</FONT>                throw new MathException("Conversion Exception in Transformation, Object is null");<a name="line.47"></a>
<FONT color="green">048</FONT>            }<a name="line.48"></a>
<FONT color="green">049</FONT>    <a name="line.49"></a>
<FONT color="green">050</FONT>            if (o instanceof Number) {<a name="line.50"></a>
<FONT color="green">051</FONT>                return ((Number)o).doubleValue();<a name="line.51"></a>
<FONT color="green">052</FONT>            }<a name="line.52"></a>
<FONT color="green">053</FONT>    <a name="line.53"></a>
<FONT color="green">054</FONT>            try {<a name="line.54"></a>
<FONT color="green">055</FONT>                return Double.valueOf(o.toString()).doubleValue();<a name="line.55"></a>
<FONT color="green">056</FONT>            } catch (NumberFormatException e) {<a name="line.56"></a>
<FONT color="green">057</FONT>                throw new MathException(e,<a name="line.57"></a>
<FONT color="green">058</FONT>                                        "Conversion Exception in Transformation: {0}", e.getMessage());<a name="line.58"></a>
<FONT color="green">059</FONT>            }<a name="line.59"></a>
<FONT color="green">060</FONT>        }<a name="line.60"></a>
<FONT color="green">061</FONT>    <a name="line.61"></a>
<FONT color="green">062</FONT>        /** {@inheritDoc} */<a name="line.62"></a>
<FONT color="green">063</FONT>        @Override<a name="line.63"></a>
<FONT color="green">064</FONT>        public boolean equals(Object other) {<a name="line.64"></a>
<FONT color="green">065</FONT>            if (this == other) {<a name="line.65"></a>
<FONT color="green">066</FONT>                return true;<a name="line.66"></a>
<FONT color="green">067</FONT>            }<a name="line.67"></a>
<FONT color="green">068</FONT>            if (other == null) {<a name="line.68"></a>
<FONT color="green">069</FONT>                return false;<a name="line.69"></a>
<FONT color="green">070</FONT>            }<a name="line.70"></a>
<FONT color="green">071</FONT>            return other instanceof DefaultTransformer;<a name="line.71"></a>
<FONT color="green">072</FONT>        }<a name="line.72"></a>
<FONT color="green">073</FONT>    <a name="line.73"></a>
<FONT color="green">074</FONT>        /** {@inheritDoc} */<a name="line.74"></a>
<FONT color="green">075</FONT>        @Override<a name="line.75"></a>
<FONT color="green">076</FONT>        public int hashCode() {<a name="line.76"></a>
<FONT color="green">077</FONT>            // some arbitrary number ...<a name="line.77"></a>
<FONT color="green">078</FONT>            return 401993047;<a name="line.78"></a>
<FONT color="green">079</FONT>        }<a name="line.79"></a>
<FONT color="green">080</FONT>    <a name="line.80"></a>
<FONT color="green">081</FONT>    }<a name="line.81"></a>




























































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