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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.util;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import org.apache.commons.lang3.StringUtils;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span><a name="line.22"></a> |
| <span class="sourceLineNo">023</span>/**<a name="line.23"></a> |
| <span class="sourceLineNo">024</span> * Utility for Strings.<a name="line.24"></a> |
| <span class="sourceLineNo">025</span> */<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>@InterfaceAudience.Private<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>public final class Strings {<a name="line.27"></a> |
| <span class="sourceLineNo">028</span> public static final String DEFAULT_SEPARATOR = "=";<a name="line.28"></a> |
| <span class="sourceLineNo">029</span> public static final String DEFAULT_KEYVALUE_SEPARATOR = ", ";<a name="line.29"></a> |
| <span class="sourceLineNo">030</span><a name="line.30"></a> |
| <span class="sourceLineNo">031</span> private Strings() {<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> }<a name="line.32"></a> |
| <span class="sourceLineNo">033</span><a name="line.33"></a> |
| <span class="sourceLineNo">034</span> /**<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * Append to a StringBuilder a key/value. Uses default separators.<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> * @param sb StringBuilder to use<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * @param key Key to append.<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * @param value Value to append.<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * @return Passed <code>sb</code> populated with key/value.<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> */<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> public static StringBuilder appendKeyValue(final StringBuilder sb, final String key,<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> final Object value) {<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> return appendKeyValue(sb, key, value, DEFAULT_SEPARATOR, DEFAULT_KEYVALUE_SEPARATOR);<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> }<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> /**<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * Append to a StringBuilder a key/value. Uses default separators.<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * @param sb StringBuilder to use<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * @param key Key to append.<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * @param value Value to append.<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * @param separator Value to use between key and value.<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * @param keyValueSeparator Value to use between key/value sets.<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * @return Passed <code>sb</code> populated with key/value.<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> */<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> public static StringBuilder appendKeyValue(final StringBuilder sb, final String key,<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> final Object value, final String separator, final String keyValueSeparator) {<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> if (sb.length() > 0) {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> sb.append(keyValueSeparator);<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> }<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> return sb.append(key).append(separator).append(value);<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> }<a name="line.61"></a> |
| <span class="sourceLineNo">062</span><a name="line.62"></a> |
| <span class="sourceLineNo">063</span> /**<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> * Given a PTR string generated via reverse DNS lookup, return everything except the trailing<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> * period. Example for host.example.com., return host.example.com<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> * @param dnPtr a domain name pointer (PTR) string.<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> * @return Sanitized hostname with last period stripped off.<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> */<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> public static String domainNamePointerToHostName(String dnPtr) {<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> if (dnPtr == null) {<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> return null;<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> }<a name="line.72"></a> |
| <span class="sourceLineNo">073</span><a name="line.73"></a> |
| <span class="sourceLineNo">074</span> return dnPtr.endsWith(".") ? dnPtr.substring(0, dnPtr.length() - 1) : dnPtr;<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> }<a name="line.75"></a> |
| <span class="sourceLineNo">076</span><a name="line.76"></a> |
| <span class="sourceLineNo">077</span> /**<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * Push the input string to the right by appending a character before it, usually a space.<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> * @param input the string to pad<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> * @param padding the character to repeat to the left of the input string<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> * @param length the desired total length including the padding<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> * @return padding characters + input<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> */<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> public static String padFront(String input, char padding, int length) {<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> if (input.length() > length) {<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> throw new IllegalArgumentException("input \"" + input + "\" longer than maxLength=" + length);<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> }<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> int numPaddingCharacters = length - input.length();<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> return StringUtils.repeat(padding, numPaddingCharacters) + input;<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> }<a name="line.90"></a> |
| <span class="sourceLineNo">091</span>}<a name="line.91"></a> |
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