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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 or more<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * contributor license agreements. See the NOTICE file distributed with<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache license, Version 2.0<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * the License. You may obtain a copy of the License at<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> *<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> *<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * See the license for the specific language governing permissions and<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * limitations under the license.<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> */<a name="line.16"></a> |
| <span class="sourceLineNo">017</span>package org.apache.logging.log4j.util;<a name="line.17"></a> |
| <span class="sourceLineNo">018</span><a name="line.18"></a> |
| <span class="sourceLineNo">019</span>import java.util.Iterator;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.util.Locale;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.util.Objects;<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> * <em>Consider this class private.</em><a name="line.24"></a> |
| <span class="sourceLineNo">025</span> * <a name="line.25"></a> |
| <span class="sourceLineNo">026</span> * @see <a href="http://commons.apache.org/proper/commons-lang/">Apache Commons Lang</a><a name="line.26"></a> |
| <span class="sourceLineNo">027</span> */<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>public final class Strings {<a name="line.28"></a> |
| <span class="sourceLineNo">029</span><a name="line.29"></a> |
| <span class="sourceLineNo">030</span> /**<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> * The empty string.<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> */<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> public static final String EMPTY = "";<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> <a name="line.34"></a> |
| <span class="sourceLineNo">035</span> /**<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> * OS-dependent line separator, defaults to {@code "\n"} if the system property {@code ""line.separator"} cannot be<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * read.<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> */<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> public static final String LINE_SEPARATOR = PropertiesUtil.getProperties().getStringProperty("line.separator",<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> "\n");<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> /**<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * Returns a double quoted string.<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * <a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * @param str a String<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * @return {@code "str"}<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> */<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> public static String dquote(final String str) {<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> return Chars.DQUOTE + str + Chars.DQUOTE;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> }<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> <a name="line.51"></a> |
| <span class="sourceLineNo">052</span> /**<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * Checks if a String is blank. A blank string is one that is {@code null}, empty, or when trimmed using<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * {@link String#trim()} is empty.<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> *<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> * @param s the String to check, may be {@code null}<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> * @return {@code true} if the String is {@code null}, empty, or trims to empty.<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> */<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> public static boolean isBlank(final String s) {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> return s == null || s.trim().isEmpty();<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> * <p><a name="line.64"></a> |
| <span class="sourceLineNo">065</span> * Checks if a CharSequence is empty ("") or null.<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> * </p><a name="line.66"></a> |
| <span class="sourceLineNo">067</span> *<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> * <pre><a name="line.68"></a> |
| <span class="sourceLineNo">069</span> * Strings.isEmpty(null) = true<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * Strings.isEmpty("") = true<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * Strings.isEmpty(" ") = false<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * Strings.isEmpty("bob") = false<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * Strings.isEmpty(" bob ") = false<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * </pre><a name="line.74"></a> |
| <span class="sourceLineNo">075</span> *<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * <p><a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * NOTE: This method changed in Lang version 2.0. It no longer trims the CharSequence. That functionality is<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * available in isBlank().<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> * </p><a name="line.79"></a> |
| <span class="sourceLineNo">080</span> *<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> * <p><a name="line.81"></a> |
| <span class="sourceLineNo">082</span> * Copied from Apache Commons Lang org.apache.commons.lang3.StringUtils.isEmpty(CharSequence)<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> * </p><a name="line.83"></a> |
| <span class="sourceLineNo">084</span> *<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> * @param cs the CharSequence to check, may be null<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> * @return {@code true} if the CharSequence is empty or null<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> */<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> public static boolean isEmpty(final CharSequence cs) {<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> return cs == null || cs.length() == 0;<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> |
| <span class="sourceLineNo">092</span> /**<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> * Checks if a String is not blank. The opposite of {@link #isBlank(String)}.<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> *<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> * @param s the String to check, may be {@code null}<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> * @return {@code true} if the String is non-{@code null} and has content after being trimmed.<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> */<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> public static boolean isNotBlank(final String s) {<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> return !isBlank(s);<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> }<a name="line.100"></a> |
| <span class="sourceLineNo">101</span><a name="line.101"></a> |
| <span class="sourceLineNo">102</span> /**<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> * <p><a name="line.103"></a> |
| <span class="sourceLineNo">104</span> * Checks if a CharSequence is not empty ("") and not null.<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> * </p><a name="line.105"></a> |
| <span class="sourceLineNo">106</span> *<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> * <pre><a name="line.107"></a> |
| <span class="sourceLineNo">108</span> * Strings.isNotEmpty(null) = false<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> * Strings.isNotEmpty("") = false<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> * Strings.isNotEmpty(" ") = true<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> * Strings.isNotEmpty("bob") = true<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> * Strings.isNotEmpty(" bob ") = true<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> * </pre><a name="line.113"></a> |
| <span class="sourceLineNo">114</span> *<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> * <p><a name="line.115"></a> |
| <span class="sourceLineNo">116</span> * Copied from Apache Commons Lang org.apache.commons.lang3.StringUtils.isNotEmpty(CharSequence)<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> * </p><a name="line.117"></a> |
| <span class="sourceLineNo">118</span> *<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> * @param cs the CharSequence to check, may be null<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> * @return {@code true} if the CharSequence is not empty and not null<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> */<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> public static boolean isNotEmpty(final CharSequence cs) {<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> return !isEmpty(cs);<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> }<a name="line.124"></a> |
| <span class="sourceLineNo">125</span><a name="line.125"></a> |
| <span class="sourceLineNo">126</span> /**<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> * <p>Joins the elements of the provided {@code Iterable} into<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> * a single String containing the provided elements.</p><a name="line.128"></a> |
| <span class="sourceLineNo">129</span> *<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> * <p>No delimiter is added before or after the list. Null objects or empty<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> * strings within the iteration are represented by empty strings.</p><a name="line.131"></a> |
| <span class="sourceLineNo">132</span> *<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> * @param iterable the {@code Iterable} providing the values to join together, may be null<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> * @param separator the separator character to use<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> * @return the joined String, {@code null} if null iterator input<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> */<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> public static String join(final Iterable<?> iterable, final char separator) {<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> if (iterable == null) {<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> return null;<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> }<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> return join(iterable.iterator(), separator);<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> }<a name="line.142"></a> |
| <span class="sourceLineNo">143</span><a name="line.143"></a> |
| <span class="sourceLineNo">144</span> /**<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> * <p>Joins the elements of the provided {@code Iterator} into<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> * a single String containing the provided elements.</p><a name="line.146"></a> |
| <span class="sourceLineNo">147</span> *<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> * <p>No delimiter is added before or after the list. Null objects or empty<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> * strings within the iteration are represented by empty strings.</p><a name="line.149"></a> |
| <span class="sourceLineNo">150</span> *<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> * @param iterator the {@code Iterator} of values to join together, may be null<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> * @param separator the separator character to use<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> * @return the joined String, {@code null} if null iterator input<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> */<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> public static String join(final Iterator<?> iterator, final char separator) {<a name="line.155"></a> |
| <span class="sourceLineNo">156</span><a name="line.156"></a> |
| <span class="sourceLineNo">157</span> // handle null, zero and one elements before building a buffer<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> if (iterator == null) {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> return null;<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> }<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> if (!iterator.hasNext()) {<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> return EMPTY;<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> }<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> final Object first = iterator.next();<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> if (!iterator.hasNext()) {<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> return Objects.toString(first, EMPTY);<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> }<a name="line.167"></a> |
| <span class="sourceLineNo">168</span><a name="line.168"></a> |
| <span class="sourceLineNo">169</span> // two or more elements<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> final StringBuilder buf = new StringBuilder(256); // Java default is 16, probably too small<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> if (first != null) {<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> buf.append(first);<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> }<a name="line.173"></a> |
| <span class="sourceLineNo">174</span><a name="line.174"></a> |
| <span class="sourceLineNo">175</span> while (iterator.hasNext()) {<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> buf.append(separator);<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> final Object obj = iterator.next();<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> if (obj != null) {<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> buf.append(obj);<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> }<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> }<a name="line.181"></a> |
| <span class="sourceLineNo">182</span><a name="line.182"></a> |
| <span class="sourceLineNo">183</span> return buf.toString();<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> }<a name="line.184"></a> |
| <span class="sourceLineNo">185</span><a name="line.185"></a> |
| <span class="sourceLineNo">186</span> /**<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> * <p>Gets the leftmost {@code len} characters of a String.</p><a name="line.187"></a> |
| <span class="sourceLineNo">188</span> *<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> * <p>If {@code len} characters are not available, or the<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> * String is {@code null}, the String will be returned without<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> * an exception. An empty String is returned if len is negative.</p><a name="line.191"></a> |
| <span class="sourceLineNo">192</span> *<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> * <pre><a name="line.193"></a> |
| <span class="sourceLineNo">194</span> * StringUtils.left(null, *) = null<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> * StringUtils.left(*, -ve) = ""<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> * StringUtils.left("", *) = ""<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> * StringUtils.left("abc", 0) = ""<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> * StringUtils.left("abc", 2) = "ab"<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> * StringUtils.left("abc", 4) = "abc"<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> * </pre><a name="line.200"></a> |
| <span class="sourceLineNo">201</span> *<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> * <p><a name="line.202"></a> |
| <span class="sourceLineNo">203</span> * Copied from Apache Commons Lang org.apache.commons.lang3.StringUtils.<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> * </p><a name="line.204"></a> |
| <span class="sourceLineNo">205</span> * <a name="line.205"></a> |
| <span class="sourceLineNo">206</span> * @param str the String to get the leftmost characters from, may be null<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> * @param len the length of the required String<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> * @return the leftmost characters, {@code null} if null String input<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> */<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> public static String left(final String str, final int len) {<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> if (str == null) {<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> return null;<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> }<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> if (len < 0) {<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> return EMPTY;<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> }<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> if (str.length() <= len) {<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> return str;<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> }<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> return str.substring(0, len);<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> }<a name="line.221"></a> |
| <span class="sourceLineNo">222</span><a name="line.222"></a> |
| <span class="sourceLineNo">223</span> /**<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> * Returns a quoted string.<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> * <a name="line.225"></a> |
| <span class="sourceLineNo">226</span> * @param str a String<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> * @return {@code 'str'}<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> */<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> public static String quote(final String str) {<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> return Chars.QUOTE + str + Chars.QUOTE;<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> }<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> <a name="line.232"></a> |
| <span class="sourceLineNo">233</span> /**<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> * <p><a name="line.234"></a> |
| <span class="sourceLineNo">235</span> * Removes control characters (char &lt;= 32) from both ends of this String returning {@code null} if the String is<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> * empty ("") after the trim or if it is {@code null}.<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> *<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> * <p><a name="line.238"></a> |
| <span class="sourceLineNo">239</span> * The String is trimmed using {@link String#trim()}. Trim removes start and end characters &lt;= 32.<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> * </p><a name="line.240"></a> |
| <span class="sourceLineNo">241</span> *<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> * <pre><a name="line.242"></a> |
| <span class="sourceLineNo">243</span> * Strings.trimToNull(null) = null<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> * Strings.trimToNull("") = null<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> * Strings.trimToNull(" ") = null<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> * Strings.trimToNull("abc") = "abc"<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> * Strings.trimToNull(" abc ") = "abc"<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> * </pre><a name="line.248"></a> |
| <span class="sourceLineNo">249</span> *<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> * <p><a name="line.250"></a> |
| <span class="sourceLineNo">251</span> * Copied from Apache Commons Lang org.apache.commons.lang3.StringUtils.trimToNull(String)<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> * </p><a name="line.252"></a> |
| <span class="sourceLineNo">253</span> *<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> * @param str the String to be trimmed, may be null<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> * @return the trimmed String, {@code null} if only chars &lt;= 32, empty or null String input<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> */<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> public static String trimToNull(final String str) {<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> final String ts = str == null ? null : str.trim();<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> return isEmpty(ts) ? null : ts;<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> }<a name="line.260"></a> |
| <span class="sourceLineNo">261</span><a name="line.261"></a> |
| <span class="sourceLineNo">262</span> private Strings() {<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> // empty<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> }<a name="line.264"></a> |
| <span class="sourceLineNo">265</span><a name="line.265"></a> |
| <span class="sourceLineNo">266</span> /**<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> * Shorthand for {@code str.toUpperCase(Locale.ROOT);}<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> * @param str The string to upper case.<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> * @return a new string<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> * @see String#toLowerCase(Locale)<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> */<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> public static String toRootUpperCase(final String str) {<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> return str.toUpperCase(Locale.ROOT);<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> }<a name="line.274"></a> |
| <span class="sourceLineNo">275</span><a name="line.275"></a> |
| <span class="sourceLineNo">276</span>}<a name="line.276"></a> |
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| </div> |
| </body> |
| </html> |
