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<FONT color="green">001</FONT> /*<a name="line.1"></a>
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<FONT color="green">002</FONT> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
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<FONT color="green">003</FONT> * contributor license agreements. See the NOTICE file distributed with<a name="line.3"></a>
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<FONT color="green">004</FONT> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
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<FONT color="green">005</FONT> * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
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<FONT color="green">006</FONT> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
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<FONT color="green">007</FONT> * the License. You may obtain a copy of the License at<a name="line.7"></a>
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<FONT color="green">008</FONT> * <a name="line.8"></a>
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<FONT color="green">009</FONT> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
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<FONT color="green">010</FONT> * <a name="line.10"></a>
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<FONT color="green">011</FONT> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
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<FONT color="green">012</FONT> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
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<FONT color="green">013</FONT> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
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<FONT color="green">014</FONT> * See the License for the specific language governing permissions and<a name="line.14"></a>
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<FONT color="green">015</FONT> * limitations under the License.<a name="line.15"></a>
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<FONT color="green">016</FONT> */<a name="line.16"></a>
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<FONT color="green">017</FONT> <a name="line.17"></a>
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<FONT color="green">018</FONT> package org.apache.commons.codec;<a name="line.18"></a>
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<FONT color="green">019</FONT> <a name="line.19"></a>
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<FONT color="green">020</FONT> import java.util.Comparator;<a name="line.20"></a>
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<FONT color="green">021</FONT> <a name="line.21"></a>
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<FONT color="green">022</FONT> /**<a name="line.22"></a>
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<FONT color="green">023</FONT> * Strings are comparable, and this comparator allows <a name="line.23"></a>
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<FONT color="green">024</FONT> * you to configure it with an instance of a class<a name="line.24"></a>
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<FONT color="green">025</FONT> * which implements StringEncoder. This comparator<a name="line.25"></a>
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<FONT color="green">026</FONT> * is used to sort Strings by an encoding scheme such<a name="line.26"></a>
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<FONT color="green">027</FONT> * as Soundex, Metaphone, etc. This class can come in<a name="line.27"></a>
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<FONT color="green">028</FONT> * handy if one need to sort Strings by an encoded<a name="line.28"></a>
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<FONT color="green">029</FONT> * form of a name such as Soundex.<a name="line.29"></a>
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<FONT color="green">030</FONT> *<a name="line.30"></a>
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<FONT color="green">031</FONT> * @author Apache Software Foundation<a name="line.31"></a>
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<FONT color="green">032</FONT> * @version $Id: StringEncoderComparator.java 793391 2009-07-12 18:38:08Z ggregory $<a name="line.32"></a>
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<FONT color="green">033</FONT> */<a name="line.33"></a>
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<FONT color="green">034</FONT> public class StringEncoderComparator implements Comparator {<a name="line.34"></a>
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<FONT color="green">035</FONT> <a name="line.35"></a>
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<FONT color="green">036</FONT> /**<a name="line.36"></a>
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<FONT color="green">037</FONT> * Internal encoder instance.<a name="line.37"></a>
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<FONT color="green">038</FONT> */<a name="line.38"></a>
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<FONT color="green">039</FONT> private final StringEncoder stringEncoder;<a name="line.39"></a>
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<FONT color="green">040</FONT> <a name="line.40"></a>
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<FONT color="green">041</FONT> /**<a name="line.41"></a>
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<FONT color="green">042</FONT> * Constructs a new instance.<a name="line.42"></a>
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<FONT color="green">043</FONT> * @deprecated as creating without a StringEncoder will lead to a <a name="line.43"></a>
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<FONT color="green">044</FONT> * broken NullPointerException creating comparator.<a name="line.44"></a>
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<FONT color="green">045</FONT> */<a name="line.45"></a>
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<FONT color="green">046</FONT> public StringEncoderComparator() {<a name="line.46"></a>
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<FONT color="green">047</FONT> this.stringEncoder = null; // Trying to use this will cause things to break<a name="line.47"></a>
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<FONT color="green">048</FONT> }<a name="line.48"></a>
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<FONT color="green">049</FONT> <a name="line.49"></a>
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<FONT color="green">050</FONT> /**<a name="line.50"></a>
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<FONT color="green">051</FONT> * Constructs a new instance with the given algorithm.<a name="line.51"></a>
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<FONT color="green">052</FONT> * @param stringEncoder the StringEncoder used for comparisons.<a name="line.52"></a>
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<FONT color="green">053</FONT> */<a name="line.53"></a>
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<FONT color="green">054</FONT> public StringEncoderComparator(StringEncoder stringEncoder) {<a name="line.54"></a>
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<FONT color="green">055</FONT> this.stringEncoder = stringEncoder;<a name="line.55"></a>
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<FONT color="green">056</FONT> }<a name="line.56"></a>
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<FONT color="green">057</FONT> <a name="line.57"></a>
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<FONT color="green">058</FONT> /**<a name="line.58"></a>
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<FONT color="green">059</FONT> * Compares two strings based not on the strings <a name="line.59"></a>
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<FONT color="green">060</FONT> * themselves, but on an encoding of the two <a name="line.60"></a>
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<FONT color="green">061</FONT> * strings using the StringEncoder this Comparator<a name="line.61"></a>
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<FONT color="green">062</FONT> * was created with.<a name="line.62"></a>
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<FONT color="green">063</FONT> * <a name="line.63"></a>
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<FONT color="green">064</FONT> * If an {@link EncoderException} is encountered, return <code>0</code>.<a name="line.64"></a>
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<FONT color="green">065</FONT> * <a name="line.65"></a>
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<FONT color="green">066</FONT> * @param o1 the object to compare<a name="line.66"></a>
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<FONT color="green">067</FONT> * @param o2 the object to compare to<a name="line.67"></a>
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<FONT color="green">068</FONT> * @return the Comparable.compareTo() return code or 0 if an encoding error was caught.<a name="line.68"></a>
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<FONT color="green">069</FONT> * @see Comparable<a name="line.69"></a>
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<FONT color="green">070</FONT> */<a name="line.70"></a>
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<FONT color="green">071</FONT> public int compare(Object o1, Object o2) {<a name="line.71"></a>
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<FONT color="green">072</FONT> <a name="line.72"></a>
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<FONT color="green">073</FONT> int compareCode = 0;<a name="line.73"></a>
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<FONT color="green">074</FONT> <a name="line.74"></a>
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<FONT color="green">075</FONT> try {<a name="line.75"></a>
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<FONT color="green">076</FONT> Comparable s1 = (Comparable) this.stringEncoder.encode(o1);<a name="line.76"></a>
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<FONT color="green">077</FONT> Comparable s2 = (Comparable) this.stringEncoder.encode(o2);<a name="line.77"></a>
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<FONT color="green">078</FONT> compareCode = s1.compareTo(s2);<a name="line.78"></a>
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<FONT color="green">079</FONT> } <a name="line.79"></a>
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<FONT color="green">080</FONT> catch (EncoderException ee) {<a name="line.80"></a>
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<FONT color="green">081</FONT> compareCode = 0;<a name="line.81"></a>
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<FONT color="green">082</FONT> }<a name="line.82"></a>
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<FONT color="green">083</FONT> return compareCode;<a name="line.83"></a>
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<FONT color="green">084</FONT> }<a name="line.84"></a>
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<FONT color="green">085</FONT> <a name="line.85"></a>
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<FONT color="green">086</FONT> }<a name="line.86"></a>