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apache / logging-site / a4f88a44f9ece0268ea2d36ba57a00f2b881cabc / . / content / log4j / 2.13.0 / log4j-core / xref / org / apache / logging / log4j / core / pattern / StyleConverter.html
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<a class="jxr_linenumber" name="L1" href="#L1">1</a> <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="L2" href="#L2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</em>
<a class="jxr_linenumber" name="L3" href="#L3">3</a> <em class="jxr_comment"> * contributor license agreements. See the NOTICE file distributed with</em>
<a class="jxr_linenumber" name="L4" href="#L4">4</a> <em class="jxr_comment"> * this work for additional information regarding copyright ownership.</em>
<a class="jxr_linenumber" name="L5" href="#L5">5</a> <em class="jxr_comment"> * The ASF licenses this file to You under the Apache license, Version 2.0</em>
<a class="jxr_linenumber" name="L6" href="#L6">6</a> <em class="jxr_comment"> * (the "License"); you may not use this file except in compliance with</em>
<a class="jxr_linenumber" name="L7" href="#L7">7</a> <em class="jxr_comment"> * the License. You may obtain a copy of the License at</em>
<a class="jxr_linenumber" name="L8" href="#L8">8</a> <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="L9" href="#L9">9</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2." target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.</a>0</em>
<a class="jxr_linenumber" name="L10" href="#L10">10</a> <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="L11" href="#L11">11</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="L12" href="#L12">12</a> <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a class="jxr_linenumber" name="L13" href="#L13">13</a> <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a class="jxr_linenumber" name="L14" href="#L14">14</a> <em class="jxr_comment"> * See the license for the specific language governing permissions and</em>
<a class="jxr_linenumber" name="L15" href="#L15">15</a> <em class="jxr_comment"> * limitations under the license.</em>
<a class="jxr_linenumber" name="L16" href="#L16">16</a> <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="L17" href="#L17">17</a> <strong class="jxr_keyword">package</strong> org.apache.logging.log4j.core.pattern;
<a class="jxr_linenumber" name="L18" href="#L18">18</a>
<a class="jxr_linenumber" name="L19" href="#L19">19</a> <strong class="jxr_keyword">import</strong> java.util.Arrays;
<a class="jxr_linenumber" name="L20" href="#L20">20</a> <strong class="jxr_keyword">import</strong> java.util.List;
<a class="jxr_linenumber" name="L21" href="#L21">21</a>
<a class="jxr_linenumber" name="L22" href="#L22">22</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.core.LogEvent;
<a class="jxr_linenumber" name="L23" href="#L23">23</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.core.config.Configuration;
<a class="jxr_linenumber" name="L24" href="#L24">24</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.core.config.plugins.Plugin;
<a class="jxr_linenumber" name="L25" href="#L25">25</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.core.layout.PatternLayout;
<a class="jxr_linenumber" name="L26" href="#L26">26</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.core.util.Patterns;
<a class="jxr_linenumber" name="L27" href="#L27">27</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.util.PerformanceSensitive;
<a class="jxr_linenumber" name="L28" href="#L28">28</a>
<a class="jxr_linenumber" name="L29" href="#L29">29</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L30" href="#L30">30</a> <em class="jxr_javadoccomment"> * Style pattern converter. Adds ANSI color styling to the result of the enclosed pattern.</em>
<a class="jxr_linenumber" name="L31" href="#L31">31</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="L32" href="#L32">32</a> <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="L33" href="#L33">33</a> <em class="jxr_javadoccomment"> * To disable ANSI output unconditionally, specify an additional option &lt;code&gt;disableAnsi=true&lt;/code&gt;, or to</em>
<a class="jxr_linenumber" name="L34" href="#L34">34</a> <em class="jxr_javadoccomment"> * disable ANSI output if no console is detected, specify option &lt;code&gt;noConsoleNoAnsi=true&lt;/code&gt;.</em>
<a class="jxr_linenumber" name="L35" href="#L35">35</a> <em class="jxr_javadoccomment"> * &lt;/p&gt;</em>
<a class="jxr_linenumber" name="L36" href="#L36">36</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L37" href="#L37">37</a> @Plugin(name = <span class="jxr_string">"style"</span>, category = PatternConverter.CATEGORY)
<a class="jxr_linenumber" name="L38" href="#L38">38</a> @ConverterKeys({ <span class="jxr_string">"style"</span> })
<a class="jxr_linenumber" name="L39" href="#L39">39</a> @PerformanceSensitive(<span class="jxr_string">"allocation"</span>)
<a class="jxr_linenumber" name="L40" href="#L40">40</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/logging/log4j/core/pattern/StyleConverter.html">StyleConverter</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../../org/apache/logging/log4j/core/pattern/LogEventPatternConverter.html">LogEventPatternConverter</a> <strong class="jxr_keyword">implements</strong> <a href="../../../../../../org/apache/logging/log4j/core/pattern/AnsiConverter.html">AnsiConverter</a> {
<a class="jxr_linenumber" name="L41" href="#L41">41</a>
<a class="jxr_linenumber" name="L42" href="#L42">42</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> List&lt;PatternFormatter&gt; patternFormatters;
<a class="jxr_linenumber" name="L43" href="#L43">43</a>
<a class="jxr_linenumber" name="L44" href="#L44">44</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> noAnsi;
<a class="jxr_linenumber" name="L45" href="#L45">45</a>
<a class="jxr_linenumber" name="L46" href="#L46">46</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> String style;
<a class="jxr_linenumber" name="L47" href="#L47">47</a>
<a class="jxr_linenumber" name="L48" href="#L48">48</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> String defaultStyle;
<a class="jxr_linenumber" name="L49" href="#L49">49</a>
<a class="jxr_linenumber" name="L50" href="#L50">50</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L51" href="#L51">51</a> <em class="jxr_javadoccomment"> * Constructs the converter.</em>
<a class="jxr_linenumber" name="L52" href="#L52">52</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="L53" href="#L53">53</a> <em class="jxr_javadoccomment"> * @param patternFormatters</em>
<a class="jxr_linenumber" name="L54" href="#L54">54</a> <em class="jxr_javadoccomment"> * The PatternFormatters to generate the text to manipulate.</em>
<a class="jxr_linenumber" name="L55" href="#L55">55</a> <em class="jxr_javadoccomment"> * @param style</em>
<a class="jxr_linenumber" name="L56" href="#L56">56</a> <em class="jxr_javadoccomment"> * The style that should encapsulate the pattern.</em>
<a class="jxr_linenumber" name="L57" href="#L57">57</a> <em class="jxr_javadoccomment"> * @param noAnsi</em>
<a class="jxr_linenumber" name="L58" href="#L58">58</a> <em class="jxr_javadoccomment"> * If true, do not output ANSI escape codes.</em>
<a class="jxr_linenumber" name="L59" href="#L59">59</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L60" href="#L60">60</a> <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/apache/logging/log4j/core/pattern/StyleConverter.html">StyleConverter</a>(<strong class="jxr_keyword">final</strong> List&lt;PatternFormatter&gt; patternFormatters, <strong class="jxr_keyword">final</strong> String style, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> noAnsi) {
<a class="jxr_linenumber" name="L61" href="#L61">61</a> <strong class="jxr_keyword">super</strong>(<span class="jxr_string">"style"</span>, <span class="jxr_string">"style"</span>);
<a class="jxr_linenumber" name="L62" href="#L62">62</a> <strong class="jxr_keyword">this</strong>.patternFormatters = patternFormatters;
<a class="jxr_linenumber" name="L63" href="#L63">63</a> <strong class="jxr_keyword">this</strong>.style = style;
<a class="jxr_linenumber" name="L64" href="#L64">64</a> <strong class="jxr_keyword">this</strong>.defaultStyle = AnsiEscape.getDefaultStyle();
<a class="jxr_linenumber" name="L65" href="#L65">65</a> <strong class="jxr_keyword">this</strong>.noAnsi = noAnsi;
<a class="jxr_linenumber" name="L66" href="#L66">66</a> }
<a class="jxr_linenumber" name="L67" href="#L67">67</a>
<a class="jxr_linenumber" name="L68" href="#L68">68</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L69" href="#L69">69</a> <em class="jxr_javadoccomment"> * Gets an instance of the class.</em>
<a class="jxr_linenumber" name="L70" href="#L70">70</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="L71" href="#L71">71</a> <em class="jxr_javadoccomment"> * @param config</em>
<a class="jxr_linenumber" name="L72" href="#L72">72</a> <em class="jxr_javadoccomment"> * The current Configuration.</em>
<a class="jxr_linenumber" name="L73" href="#L73">73</a> <em class="jxr_javadoccomment"> * @param options</em>
<a class="jxr_linenumber" name="L74" href="#L74">74</a> <em class="jxr_javadoccomment"> * pattern options, may be null. If first element is "short", only the first line of the throwable will</em>
<a class="jxr_linenumber" name="L75" href="#L75">75</a> <em class="jxr_javadoccomment"> * be formatted.</em>
<a class="jxr_linenumber" name="L76" href="#L76">76</a> <em class="jxr_javadoccomment"> * @return instance of class.</em>
<a class="jxr_linenumber" name="L77" href="#L77">77</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L78" href="#L78">78</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/apache/logging/log4j/core/pattern/StyleConverter.html">StyleConverter</a> newInstance(<strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/logging/log4j/core/config/Configuration.html">Configuration</a> config, <strong class="jxr_keyword">final</strong> String[] options) {
<a class="jxr_linenumber" name="L79" href="#L79">79</a> <strong class="jxr_keyword">if</strong> (options == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="L80" href="#L80">80</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="L81" href="#L81">81</a> }
<a class="jxr_linenumber" name="L82" href="#L82">82</a> <strong class="jxr_keyword">if</strong> (options.length &lt; 2) {
<a class="jxr_linenumber" name="L83" href="#L83">83</a> LOGGER.error(<span class="jxr_string">"Incorrect number of options on style. Expected at least 1, received "</span> + options.length);
<a class="jxr_linenumber" name="L84" href="#L84">84</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="L85" href="#L85">85</a> }
<a class="jxr_linenumber" name="L86" href="#L86">86</a> <strong class="jxr_keyword">if</strong> (options[0] == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="L87" href="#L87">87</a> LOGGER.error(<span class="jxr_string">"No pattern supplied for style converter"</span>);
<a class="jxr_linenumber" name="L88" href="#L88">88</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="L89" href="#L89">89</a> }
<a class="jxr_linenumber" name="L90" href="#L90">90</a> <strong class="jxr_keyword">if</strong> (options[1] == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="L91" href="#L91">91</a> LOGGER.error(<span class="jxr_string">"No style attributes supplied for style converter"</span>);
<a class="jxr_linenumber" name="L92" href="#L92">92</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="L93" href="#L93">93</a> }
<a class="jxr_linenumber" name="L94" href="#L94">94</a> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/logging/log4j/core/pattern/PatternParser.html">PatternParser</a> parser = PatternLayout.createPatternParser(config);
<a class="jxr_linenumber" name="L95" href="#L95">95</a> <strong class="jxr_keyword">final</strong> List&lt;PatternFormatter&gt; formatters = parser.parse(options[0]);
<a class="jxr_linenumber" name="L96" href="#L96">96</a> <strong class="jxr_keyword">final</strong> String style = AnsiEscape.createSequence(options[1].split(Patterns.COMMA_SEPARATOR));
<a class="jxr_linenumber" name="L97" href="#L97">97</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> disableAnsi = Arrays.toString(options).contains(PatternParser.DISABLE_ANSI + <span class="jxr_string">"=true"</span>);
<a class="jxr_linenumber" name="L98" href="#L98">98</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> noConsoleNoAnsi = Arrays.toString(options).contains(PatternParser.NO_CONSOLE_NO_ANSI + <span class="jxr_string">"=true"</span>);
<a class="jxr_linenumber" name="L99" href="#L99">99</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> hideAnsi = disableAnsi || (noConsoleNoAnsi &amp;&amp; System.console() == <strong class="jxr_keyword">null</strong>);
<a class="jxr_linenumber" name="L100" href="#L100">100</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/logging/log4j/core/pattern/StyleConverter.html">StyleConverter</a>(formatters, style, hideAnsi);
<a class="jxr_linenumber" name="L101" href="#L101">101</a> }
<a class="jxr_linenumber" name="L102" href="#L102">102</a>
<a class="jxr_linenumber" name="L103" href="#L103">103</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L104" href="#L104">104</a> <em class="jxr_javadoccomment"> * {@inheritDoc}</em>
<a class="jxr_linenumber" name="L105" href="#L105">105</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L106" href="#L106">106</a> @Override
<a class="jxr_linenumber" name="L107" href="#L107">107</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> format(<strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/logging/log4j/core/LogEvent.html">LogEvent</a> event, <strong class="jxr_keyword">final</strong> StringBuilder toAppendTo) {
<a class="jxr_linenumber" name="L108" href="#L108">108</a> <strong class="jxr_keyword">int</strong> start = 0;
<a class="jxr_linenumber" name="L109" href="#L109">109</a> <strong class="jxr_keyword">int</strong> end = 0;
<a class="jxr_linenumber" name="L110" href="#L110">110</a> <strong class="jxr_keyword">if</strong> (!noAnsi) { <em class="jxr_comment">// use ANSI: set prefix</em>
<a class="jxr_linenumber" name="L111" href="#L111">111</a> start = toAppendTo.length();
<a class="jxr_linenumber" name="L112" href="#L112">112</a> toAppendTo.append(style);
<a class="jxr_linenumber" name="L113" href="#L113">113</a> end = toAppendTo.length();
<a class="jxr_linenumber" name="L114" href="#L114">114</a> }
<a class="jxr_linenumber" name="L115" href="#L115">115</a>
<a class="jxr_linenumber" name="L116" href="#L116">116</a> <em class="jxr_comment">//noinspection ForLoopReplaceableByForEach</em>
<a class="jxr_linenumber" name="L117" href="#L117">117</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0, size = patternFormatters.size(); i &lt; size; i++) {
<a class="jxr_linenumber" name="L118" href="#L118">118</a> patternFormatters.get(i).format(event, toAppendTo);
<a class="jxr_linenumber" name="L119" href="#L119">119</a> }
<a class="jxr_linenumber" name="L120" href="#L120">120</a>
<a class="jxr_linenumber" name="L121" href="#L121">121</a> <em class="jxr_comment">// if we use ANSI we need to add the postfix or erase the unnecessary prefix</em>
<a class="jxr_linenumber" name="L122" href="#L122">122</a> <strong class="jxr_keyword">if</strong> (!noAnsi) {
<a class="jxr_linenumber" name="L123" href="#L123">123</a> <strong class="jxr_keyword">if</strong> (toAppendTo.length() == end) {
<a class="jxr_linenumber" name="L124" href="#L124">124</a> toAppendTo.setLength(start); <em class="jxr_comment">// erase prefix</em>
<a class="jxr_linenumber" name="L125" href="#L125">125</a> } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="L126" href="#L126">126</a> toAppendTo.append(defaultStyle); <em class="jxr_comment">// add postfix</em>
<a class="jxr_linenumber" name="L127" href="#L127">127</a> }
<a class="jxr_linenumber" name="L128" href="#L128">128</a> }
<a class="jxr_linenumber" name="L129" href="#L129">129</a> }
<a class="jxr_linenumber" name="L130" href="#L130">130</a>
<a class="jxr_linenumber" name="L131" href="#L131">131</a> @Override
<a class="jxr_linenumber" name="L132" href="#L132">132</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> handlesThrowable() {
<a class="jxr_linenumber" name="L133" href="#L133">133</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> PatternFormatter formatter : patternFormatters) {
<a class="jxr_linenumber" name="L134" href="#L134">134</a> <strong class="jxr_keyword">if</strong> (formatter.handlesThrowable()) {
<a class="jxr_linenumber" name="L135" href="#L135">135</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="L136" href="#L136">136</a> }
<a class="jxr_linenumber" name="L137" href="#L137">137</a> }
<a class="jxr_linenumber" name="L138" href="#L138">138</a> <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="L139" href="#L139">139</a> }
<a class="jxr_linenumber" name="L140" href="#L140">140</a>
<a class="jxr_linenumber" name="L141" href="#L141">141</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L142" href="#L142">142</a> <em class="jxr_javadoccomment"> * Returns a String suitable for debugging.</em>
<a class="jxr_linenumber" name="L143" href="#L143">143</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="L144" href="#L144">144</a> <em class="jxr_javadoccomment"> * @return a String suitable for debugging.</em>
<a class="jxr_linenumber" name="L145" href="#L145">145</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L146" href="#L146">146</a> @Override
<a class="jxr_linenumber" name="L147" href="#L147">147</a> <strong class="jxr_keyword">public</strong> String toString() {
<a class="jxr_linenumber" name="L148" href="#L148">148</a> <strong class="jxr_keyword">final</strong> StringBuilder sb = <strong class="jxr_keyword">new</strong> StringBuilder();
<a class="jxr_linenumber" name="L149" href="#L149">149</a> sb.append(<strong class="jxr_keyword">super</strong>.toString());
<a class="jxr_linenumber" name="L150" href="#L150">150</a> sb.append(<span class="jxr_string">"[style="</span>);
<a class="jxr_linenumber" name="L151" href="#L151">151</a> sb.append(style);
<a class="jxr_linenumber" name="L152" href="#L152">152</a> sb.append(<span class="jxr_string">", defaultStyle="</span>);
<a class="jxr_linenumber" name="L153" href="#L153">153</a> sb.append(defaultStyle);
<a class="jxr_linenumber" name="L154" href="#L154">154</a> sb.append(<span class="jxr_string">", patternFormatters="</span>);
<a class="jxr_linenumber" name="L155" href="#L155">155</a> sb.append(patternFormatters);
<a class="jxr_linenumber" name="L156" href="#L156">156</a> sb.append(<span class="jxr_string">", noAnsi="</span>);
<a class="jxr_linenumber" name="L157" href="#L157">157</a> sb.append(noAnsi);
<a class="jxr_linenumber" name="L158" href="#L158">158</a> sb.append(']');
<a class="jxr_linenumber" name="L159" href="#L159">159</a> <strong class="jxr_keyword">return</strong> sb.toString();
<a class="jxr_linenumber" name="L160" href="#L160">160</a> }
<a class="jxr_linenumber" name="L161" href="#L161">161</a>
<a class="jxr_linenumber" name="L162" href="#L162">162</a> }
</pre>
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