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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.core.pattern;<a name="line.17"></a> |
| <span class="sourceLineNo">018</span><a name="line.18"></a> |
| <span class="sourceLineNo">019</span>import java.util.ArrayList;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.util.List;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span><a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.apache.logging.log4j.util.PerformanceSensitive;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span><a name="line.23"></a> |
| <span class="sourceLineNo">024</span><a name="line.24"></a> |
| <span class="sourceLineNo">025</span>/**<a name="line.25"></a> |
| <span class="sourceLineNo">026</span> * NameAbbreviator generates abbreviated logger and class names.<a name="line.26"></a> |
| <span class="sourceLineNo">027</span> */<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>@PerformanceSensitive("allocation")<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>public abstract class NameAbbreviator {<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> /**<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> * Default (no abbreviation) abbreviator.<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> */<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> private static final NameAbbreviator DEFAULT = new NOPAbbreviator();<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> * Gets an abbreviator.<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * <p><a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * For example, "%logger{2}" will output only 2 elements of the logger name, "%logger{1.}" will output only the<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * first character of the non-final elements in the name, "%logger(1~.2~} will output the first character of the<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * first element, two characters of the second and subsequent elements and will use a tilde to indicate abbreviated<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * characters.<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * </p><a name="line.42"></a> |
| <span class="sourceLineNo">043</span> *<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * @param pattern<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * abbreviation pattern.<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * @return abbreviator, will not be null.<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> */<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> public static NameAbbreviator getAbbreviator(final String pattern) {<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> if (pattern.length() > 0) {<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> // if pattern is just spaces and numbers then<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> // use MaxElementAbbreviator<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> final String trimmed = pattern.trim();<a name="line.52"></a> |
| <span class="sourceLineNo">053</span><a name="line.53"></a> |
| <span class="sourceLineNo">054</span> if (trimmed.isEmpty()) {<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> return DEFAULT;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> }<a name="line.56"></a> |
| <span class="sourceLineNo">057</span><a name="line.57"></a> |
| <span class="sourceLineNo">058</span> boolean isNegativeNumber;<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> final String number;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span><a name="line.60"></a> |
| <span class="sourceLineNo">061</span> // check if number is a negative number<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> if (trimmed.length() > 1 && trimmed.charAt(0) == '-') {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> isNegativeNumber = true;<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> number = trimmed.substring(1);<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> } else {<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> isNegativeNumber = false;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> number = trimmed;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> }<a name="line.68"></a> |
| <span class="sourceLineNo">069</span><a name="line.69"></a> |
| <span class="sourceLineNo">070</span> int i = 0;<a name="line.70"></a> |
| <span class="sourceLineNo">071</span><a name="line.71"></a> |
| <span class="sourceLineNo">072</span> while (i < number.length() && number.charAt(i) >= '0'<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> && number.charAt(i) <= '9') {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> i++;<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> // if all blanks and digits<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> //<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> if (i == number.length()) {<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> return new MaxElementAbbreviator(Integer.parseInt(number),<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> isNegativeNumber? MaxElementAbbreviator.Strategy.DROP : MaxElementAbbreviator.Strategy.RETAIN);<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> }<a name="line.83"></a> |
| <span class="sourceLineNo">084</span><a name="line.84"></a> |
| <span class="sourceLineNo">085</span> final ArrayList<PatternAbbreviatorFragment> fragments = new ArrayList<>(5);<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> char ellipsis;<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> int charCount;<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> int pos = 0;<a name="line.88"></a> |
| <span class="sourceLineNo">089</span><a name="line.89"></a> |
| <span class="sourceLineNo">090</span> while (pos < trimmed.length() && pos >= 0) {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> int ellipsisPos = pos;<a name="line.91"></a> |
| <span class="sourceLineNo">092</span><a name="line.92"></a> |
| <span class="sourceLineNo">093</span> if (trimmed.charAt(pos) == '*') {<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> charCount = Integer.MAX_VALUE;<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> ellipsisPos++;<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> } else {<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> if (trimmed.charAt(pos) >= '0' && trimmed.charAt(pos) <= '9') {<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> charCount = trimmed.charAt(pos) - '0';<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> ellipsisPos++;<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> } else {<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> charCount = 0;<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> }<a name="line.103"></a> |
| <span class="sourceLineNo">104</span><a name="line.104"></a> |
| <span class="sourceLineNo">105</span> ellipsis = '\0';<a name="line.105"></a> |
| <span class="sourceLineNo">106</span><a name="line.106"></a> |
| <span class="sourceLineNo">107</span> if (ellipsisPos < trimmed.length()) {<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> ellipsis = trimmed.charAt(ellipsisPos);<a name="line.108"></a> |
| <span class="sourceLineNo">109</span><a name="line.109"></a> |
| <span class="sourceLineNo">110</span> if (ellipsis == '.') {<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> ellipsis = '\0';<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> }<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> }<a name="line.113"></a> |
| <span class="sourceLineNo">114</span><a name="line.114"></a> |
| <span class="sourceLineNo">115</span> fragments.add(new PatternAbbreviatorFragment(charCount, ellipsis));<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> pos = trimmed.indexOf('.', pos);<a name="line.116"></a> |
| <span class="sourceLineNo">117</span><a name="line.117"></a> |
| <span class="sourceLineNo">118</span> if (pos == -1) {<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> break;<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> }<a name="line.120"></a> |
| <span class="sourceLineNo">121</span><a name="line.121"></a> |
| <span class="sourceLineNo">122</span> pos++;<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> }<a name="line.123"></a> |
| <span class="sourceLineNo">124</span><a name="line.124"></a> |
| <span class="sourceLineNo">125</span> return new PatternAbbreviator(fragments);<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> }<a name="line.126"></a> |
| <span class="sourceLineNo">127</span><a name="line.127"></a> |
| <span class="sourceLineNo">128</span> //<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> // no matching abbreviation, return defaultAbbreviator<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> //<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> return DEFAULT;<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> }<a name="line.132"></a> |
| <span class="sourceLineNo">133</span><a name="line.133"></a> |
| <span class="sourceLineNo">134</span> /**<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> * Gets default abbreviator.<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> *<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> * @return default abbreviator.<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> */<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> public static NameAbbreviator getDefaultAbbreviator() {<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> return DEFAULT;<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> }<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> * Abbreviates a name in a String.<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> *<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> * @param original the text to abbreviate, may not be null.<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> * @param destination StringBuilder to write the result to<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> */<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> public abstract void abbreviate(final String original, final StringBuilder destination);<a name="line.149"></a> |
| <span class="sourceLineNo">150</span><a name="line.150"></a> |
| <span class="sourceLineNo">151</span> /**<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> * Abbreviator that simply appends full name to buffer.<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> */<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> private static class NOPAbbreviator extends NameAbbreviator {<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> /**<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> * Constructor.<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> */<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> public NOPAbbreviator() {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> }<a name="line.159"></a> |
| <span class="sourceLineNo">160</span><a name="line.160"></a> |
| <span class="sourceLineNo">161</span> /**<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> * {@inheritDoc}<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> */<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> @Override<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> public void abbreviate(final String original, final StringBuilder destination) {<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> destination.append(original);<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><a name="line.169"></a> |
| <span class="sourceLineNo">170</span> /**<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> * Abbreviator that drops starting path elements.<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> */<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> private static class MaxElementAbbreviator extends NameAbbreviator {<a name="line.173"></a> |
| <span class="sourceLineNo">174</span><a name="line.174"></a> |
| <span class="sourceLineNo">175</span> /**<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> * <p>When the name is reduced in length by cutting parts, there can be two ways to do it.</p><a name="line.176"></a> |
| <span class="sourceLineNo">177</span> * 1. Remove a given number of parts starting from front - called DROP <br/><a name="line.177"></a> |
| <span class="sourceLineNo">178</span> * 2. Retain a given number of parts starting from the end - called RETAIN<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> */<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> private enum Strategy {<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> DROP(0) {<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> @Override<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> void abbreviate(final int count, final String original, final StringBuilder destination) {<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> // If a path does not contain enough path elements to drop, none will be dropped.<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> int start = 0;<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> int nextStart;<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> for (int i = 0; i < count; i++) {<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> nextStart = original.indexOf('.', start);<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> if (nextStart == -1) {<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> destination.append(original);<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> return;<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> }<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> start = nextStart + 1;<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> }<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> destination.append(original, start, original.length());<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> }<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> },<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> RETAIN(1) {<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> @Override<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> void abbreviate(final int count, final String original, final StringBuilder destination) {<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> // We subtract 1 from 'len' when assigning to 'end' to avoid out of<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> // bounds exception in return r.substring(end+1, len). This can happen if<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> // precision is 1 and the category name ends with a dot.<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> int end = original.length() - 1;<a name="line.204"></a> |
| <span class="sourceLineNo">205</span><a name="line.205"></a> |
| <span class="sourceLineNo">206</span> for (int i = count; i > 0; i--) {<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> end = original.lastIndexOf('.', end - 1);<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> if (end == -1) {<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> destination.append(original);<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> return;<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> }<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> }<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> destination.append(original, end + 1, original.length());<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> }<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> };<a name="line.215"></a> |
| <span class="sourceLineNo">216</span><a name="line.216"></a> |
| <span class="sourceLineNo">217</span> final int minCount;<a name="line.217"></a> |
| <span class="sourceLineNo">218</span><a name="line.218"></a> |
| <span class="sourceLineNo">219</span> Strategy(final int minCount) {<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> this.minCount = minCount;<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> abstract void abbreviate(final int count, final String original, final StringBuilder destination);<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> }<a name="line.224"></a> |
| <span class="sourceLineNo">225</span><a name="line.225"></a> |
| <span class="sourceLineNo">226</span> /**<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> * Maximum number of path elements to output.<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> */<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> private final int count;<a name="line.229"></a> |
| <span class="sourceLineNo">230</span><a name="line.230"></a> |
| <span class="sourceLineNo">231</span> /**<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> * Strategy used for cutting down the size of the name<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> */<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> private final Strategy strategy;<a name="line.234"></a> |
| <span class="sourceLineNo">235</span><a name="line.235"></a> |
| <span class="sourceLineNo">236</span> /**<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> * Create new instance.<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> *<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> * @param count maximum number of path elements to drop or output.<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> * @param strategy drop or retain<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> */<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> public MaxElementAbbreviator(final int count, final Strategy strategy) {<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> this.count = Math.max(count, strategy.minCount);<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> this.strategy = strategy;<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> }<a name="line.245"></a> |
| <span class="sourceLineNo">246</span><a name="line.246"></a> |
| <span class="sourceLineNo">247</span> /**<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> * Abbreviate name.<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> *<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> * @param original The String to abbreviate.<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> * @param destination the buffer to write the abbreviated name into<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> */<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> @Override<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> public void abbreviate(final String original, final StringBuilder destination) {<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> strategy.abbreviate(count, original, destination);<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> }<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> }<a name="line.257"></a> |
| <span class="sourceLineNo">258</span><a name="line.258"></a> |
| <span class="sourceLineNo">259</span> /**<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> * Fragment of an pattern abbreviator.<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> */<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> private static class PatternAbbreviatorFragment {<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> /**<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> * Count of initial characters of element to output.<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> */<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> private final int charCount;<a name="line.266"></a> |
| <span class="sourceLineNo">267</span><a name="line.267"></a> |
| <span class="sourceLineNo">268</span> /**<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> * Character used to represent dropped characters.<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> * '\0' indicates no representation of dropped characters.<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> */<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> private final char ellipsis;<a name="line.272"></a> |
| <span class="sourceLineNo">273</span><a name="line.273"></a> |
| <span class="sourceLineNo">274</span> /**<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> * Creates a PatternAbbreviatorFragment.<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> *<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> * @param charCount number of initial characters to preserve.<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> * @param ellipsis character to represent elimination of characters,<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> * '\0' if no ellipsis is desired.<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> */<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> public PatternAbbreviatorFragment(<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> final int charCount, final char ellipsis) {<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> this.charCount = charCount;<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> this.ellipsis = ellipsis;<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> }<a name="line.285"></a> |
| <span class="sourceLineNo">286</span><a name="line.286"></a> |
| <span class="sourceLineNo">287</span> /**<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> * Abbreviate element of name.<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> *<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> * @param buf buffer to receive element.<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> * @param startPos starting index of name element.<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> * @return starting index of next element.<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> */<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> public int abbreviate(final StringBuilder buf, final int startPos) {<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> final int start = (startPos < 0) ? 0 : startPos;<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> final int max = buf.length();<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> int nextDot = -1;<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> for (int i = start; i < max; i++) {<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> if (buf.charAt(i) == '.') {<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> nextDot = i;<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> break;<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> }<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> }<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> if (nextDot != -1) {<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> if (nextDot - startPos > charCount) {<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> buf.delete(startPos + charCount, nextDot);<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> nextDot = startPos + charCount;<a name="line.307"></a> |
| <span class="sourceLineNo">308</span><a name="line.308"></a> |
| <span class="sourceLineNo">309</span> if (ellipsis != '\0') {<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> buf.insert(nextDot, ellipsis);<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> nextDot++;<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> }<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> }<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> nextDot++;<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> }<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> return nextDot;<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> }<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> }<a name="line.318"></a> |
| <span class="sourceLineNo">319</span><a name="line.319"></a> |
| <span class="sourceLineNo">320</span> /**<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> * Pattern abbreviator.<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> */<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> private static class PatternAbbreviator extends NameAbbreviator {<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> /**<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> * Element abbreviation patterns.<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> */<a name="line.326"></a> |
| <span class="sourceLineNo">327</span> private final PatternAbbreviatorFragment[] fragments;<a name="line.327"></a> |
| <span class="sourceLineNo">328</span><a name="line.328"></a> |
| <span class="sourceLineNo">329</span> /**<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> * Create PatternAbbreviator.<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> *<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> * @param fragments element abbreviation patterns.<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> */<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> public PatternAbbreviator(final List<PatternAbbreviatorFragment> fragments) {<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> if (fragments.isEmpty()) {<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> throw new IllegalArgumentException(<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> "fragments must have at least one element");<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> }<a name="line.338"></a> |
| <span class="sourceLineNo">339</span><a name="line.339"></a> |
| <span class="sourceLineNo">340</span> this.fragments = new PatternAbbreviatorFragment[fragments.size()];<a name="line.340"></a> |
| <span class="sourceLineNo">341</span> fragments.toArray(this.fragments);<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> }<a name="line.342"></a> |
| <span class="sourceLineNo">343</span><a name="line.343"></a> |
| <span class="sourceLineNo">344</span> /**<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> * Abbreviates name.<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> *<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> * @param original the original string to abbreviate<a name="line.347"></a> |
| <span class="sourceLineNo">348</span> * @param destination buffer that abbreviated name is appended to<a name="line.348"></a> |
| <span class="sourceLineNo">349</span> */<a name="line.349"></a> |
| <span class="sourceLineNo">350</span> @Override<a name="line.350"></a> |
| <span class="sourceLineNo">351</span> public void abbreviate(final String original, final StringBuilder destination) {<a name="line.351"></a> |
| <span class="sourceLineNo">352</span> //<a name="line.352"></a> |
| <span class="sourceLineNo">353</span> // all non-terminal patterns are executed once<a name="line.353"></a> |
| <span class="sourceLineNo">354</span> //<a name="line.354"></a> |
| <span class="sourceLineNo">355</span> int pos = destination.length();<a name="line.355"></a> |
| <span class="sourceLineNo">356</span> final int max = pos + original.length();<a name="line.356"></a> |
| <span class="sourceLineNo">357</span><a name="line.357"></a> |
| <span class="sourceLineNo">358</span> destination.append(original);<a name="line.358"></a> |
| <span class="sourceLineNo">359</span><a name="line.359"></a> |
| <span class="sourceLineNo">360</span> int fragmentIndex = 0;<a name="line.360"></a> |
| <span class="sourceLineNo">361</span> while (pos < max && pos >= 0) {<a name="line.361"></a> |
| <span class="sourceLineNo">362</span> pos = fragments[fragmentIndex].abbreviate(destination, pos);<a name="line.362"></a> |
| <span class="sourceLineNo">363</span> // last pattern in executed repeatedly<a name="line.363"></a> |
| <span class="sourceLineNo">364</span> if (fragmentIndex < fragments.length - 1) {<a name="line.364"></a> |
| <span class="sourceLineNo">365</span> fragmentIndex++;<a name="line.365"></a> |
| <span class="sourceLineNo">366</span> }<a name="line.366"></a> |
| <span class="sourceLineNo">367</span> }<a name="line.367"></a> |
| <span class="sourceLineNo">368</span> }<a name="line.368"></a> |
| <span class="sourceLineNo">369</span> }<a name="line.369"></a> |
| <span class="sourceLineNo">370</span>}<a name="line.370"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
