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apache / logging-log4j-site / 9755b12b39efbc0142688f9b1a11ec68db89f97b / . / 2.13.3 / log4j-core / xref / org / apache / logging / log4j / core / config / plugins / convert / TypeConverterRegistry.html
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<div id="overview"><a href="../../../../../../../../../apidocs/org/apache/logging/log4j/core/config/plugins/convert/TypeConverterRegistry.html">View Javadoc</a></div><pre>
<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.config.plugins.convert;
<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.lang.reflect.ParameterizedType;
<a class="jxr_linenumber" name="L20" href="#L20">20</a> <strong class="jxr_keyword">import</strong> java.lang.reflect.Type;
<a class="jxr_linenumber" name="L21" href="#L21">21</a> <strong class="jxr_keyword">import</strong> java.util.Collection;
<a class="jxr_linenumber" name="L22" href="#L22">22</a> <strong class="jxr_keyword">import</strong> java.util.Map;
<a class="jxr_linenumber" name="L23" href="#L23">23</a> <strong class="jxr_keyword">import</strong> java.util.Objects;
<a class="jxr_linenumber" name="L24" href="#L24">24</a> <strong class="jxr_keyword">import</strong> java.util.UnknownFormatConversionException;
<a class="jxr_linenumber" name="L25" href="#L25">25</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.ConcurrentHashMap;
<a class="jxr_linenumber" name="L26" href="#L26">26</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.ConcurrentMap;
<a class="jxr_linenumber" name="L27" href="#L27">27</a>
<a class="jxr_linenumber" name="L28" href="#L28">28</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.Logger;
<a class="jxr_linenumber" name="L29" href="#L29">29</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.core.config.plugins.util.PluginManager;
<a class="jxr_linenumber" name="L30" href="#L30">30</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.core.config.plugins.util.PluginType;
<a class="jxr_linenumber" name="L31" href="#L31">31</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.core.util.ReflectionUtil;
<a class="jxr_linenumber" name="L32" href="#L32">32</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.core.util.TypeUtil;
<a class="jxr_linenumber" name="L33" href="#L33">33</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.status.StatusLogger;
<a class="jxr_linenumber" name="L34" href="#L34">34</a>
<a class="jxr_linenumber" name="L35" href="#L35">35</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L36" href="#L36">36</a> <em class="jxr_javadoccomment"> * Registry for {@link TypeConverter} plugins.</em>
<a class="jxr_linenumber" name="L37" href="#L37">37</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="L38" href="#L38">38</a> <em class="jxr_javadoccomment"> * @since 2.1</em>
<a class="jxr_linenumber" name="L39" href="#L39">39</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L40" href="#L40">40</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../../../org/apache/logging/log4j/core/config/plugins/convert/TypeConverterRegistry.html">TypeConverterRegistry</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">static</strong> <strong class="jxr_keyword">final</strong> Logger LOGGER = StatusLogger.getLogger();
<a class="jxr_linenumber" name="L43" href="#L43">43</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">volatile</strong> <a href="../../../../../../../../org/apache/logging/log4j/core/config/plugins/convert/TypeConverterRegistry.html">TypeConverterRegistry</a> INSTANCE;
<a class="jxr_linenumber" name="L44" href="#L44">44</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Object INSTANCE_LOCK = <strong class="jxr_keyword">new</strong> Object();
<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> ConcurrentMap&lt;Type, TypeConverter&lt;?&gt;&gt; registry = <strong class="jxr_keyword">new</strong> ConcurrentHashMap&lt;&gt;();
<a class="jxr_linenumber" name="L47" href="#L47">47</a>
<a class="jxr_linenumber" name="L48" href="#L48">48</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L49" href="#L49">49</a> <em class="jxr_javadoccomment"> * Gets the singleton instance of the TypeConverterRegistry.</em>
<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"> * @return the singleton instance.</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> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../../../org/apache/logging/log4j/core/config/plugins/convert/TypeConverterRegistry.html">TypeConverterRegistry</a> getInstance() {
<a class="jxr_linenumber" name="L54" href="#L54">54</a> <a href="../../../../../../../../org/apache/logging/log4j/core/config/plugins/convert/TypeConverterRegistry.html">TypeConverterRegistry</a> result = INSTANCE;
<a class="jxr_linenumber" name="L55" href="#L55">55</a> <strong class="jxr_keyword">if</strong> (result == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="L56" href="#L56">56</a> <strong class="jxr_keyword">synchronized</strong> (INSTANCE_LOCK) {
<a class="jxr_linenumber" name="L57" href="#L57">57</a> result = INSTANCE;
<a class="jxr_linenumber" name="L58" href="#L58">58</a> <strong class="jxr_keyword">if</strong> (result == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="L59" href="#L59">59</a> INSTANCE = result = <strong class="jxr_keyword">new</strong> <a href="../../../../../../../../org/apache/logging/log4j/core/config/plugins/convert/TypeConverterRegistry.html">TypeConverterRegistry</a>();
<a class="jxr_linenumber" name="L60" href="#L60">60</a> }
<a class="jxr_linenumber" name="L61" href="#L61">61</a> }
<a class="jxr_linenumber" name="L62" href="#L62">62</a> }
<a class="jxr_linenumber" name="L63" href="#L63">63</a> <strong class="jxr_keyword">return</strong> result;
<a class="jxr_linenumber" name="L64" href="#L64">64</a> }
<a class="jxr_linenumber" name="L65" href="#L65">65</a>
<a class="jxr_linenumber" name="L66" href="#L66">66</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L67" href="#L67">67</a> <em class="jxr_javadoccomment"> * Finds a {@link TypeConverter} for the given {@link Type}, falling back to an assignment-compatible TypeConverter</em>
<a class="jxr_linenumber" name="L68" href="#L68">68</a> <em class="jxr_javadoccomment"> * if none exist for the given type. That is, if the given Type does not have a TypeConverter, but another Type</em>
<a class="jxr_linenumber" name="L69" href="#L69">69</a> <em class="jxr_javadoccomment"> * which can be assigned to the given Type &lt;em&gt;does&lt;/em&gt; have a TypeConverter, then that TypeConverter will be</em>
<a class="jxr_linenumber" name="L70" href="#L70">70</a> <em class="jxr_javadoccomment"> * used and registered.</em>
<a class="jxr_linenumber" name="L71" href="#L71">71</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="L72" href="#L72">72</a> <em class="jxr_javadoccomment"> * @param type the Type to find a TypeConverter for (must not be {@code null}).</em>
<a class="jxr_linenumber" name="L73" href="#L73">73</a> <em class="jxr_javadoccomment"> * @return a TypeConverter for the given Type.</em>
<a class="jxr_linenumber" name="L74" href="#L74">74</a> <em class="jxr_javadoccomment"> * @throws UnknownFormatConversionException if no TypeConverter can be found for the given type.</em>
<a class="jxr_linenumber" name="L75" href="#L75">75</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L76" href="#L76">76</a> <strong class="jxr_keyword">public</strong> TypeConverter&lt;?&gt; findCompatibleConverter(<strong class="jxr_keyword">final</strong> Type type) {
<a class="jxr_linenumber" name="L77" href="#L77">77</a> Objects.requireNonNull(type, <span class="jxr_string">"No type was provided"</span>);
<a class="jxr_linenumber" name="L78" href="#L78">78</a> <strong class="jxr_keyword">final</strong> TypeConverter&lt;?&gt; primary = registry.get(type);
<a class="jxr_linenumber" name="L79" href="#L79">79</a> <em class="jxr_comment">// cached type converters</em>
<a class="jxr_linenumber" name="L80" href="#L80">80</a> <strong class="jxr_keyword">if</strong> (primary != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="L81" href="#L81">81</a> <strong class="jxr_keyword">return</strong> primary;
<a class="jxr_linenumber" name="L82" href="#L82">82</a> }
<a class="jxr_linenumber" name="L83" href="#L83">83</a> <em class="jxr_comment">// dynamic enum support</em>
<a class="jxr_linenumber" name="L84" href="#L84">84</a> <strong class="jxr_keyword">if</strong> (type instanceof Class&lt;?&gt;) {
<a class="jxr_linenumber" name="L85" href="#L85">85</a> <strong class="jxr_keyword">final</strong> Class&lt;?&gt; clazz = (Class&lt;?&gt;) type;
<a class="jxr_linenumber" name="L86" href="#L86">86</a> <strong class="jxr_keyword">if</strong> (clazz.isEnum()) {
<a class="jxr_linenumber" name="L87" href="#L87">87</a> @SuppressWarnings({<span class="jxr_string">"unchecked"</span>,<span class="jxr_string">"rawtypes"</span>})
<a class="jxr_linenumber" name="L88" href="#L88">88</a> <strong class="jxr_keyword">final</strong> EnumConverter&lt;? <strong class="jxr_keyword">extends</strong> Enum&gt; converter = <strong class="jxr_keyword">new</strong> <a href="../../../../../../../../org/apache/logging/log4j/core/config/plugins/convert/EnumConverter.html">EnumConverter</a>(clazz.asSubclass(Enum.<strong class="jxr_keyword">class</strong>));
<a class="jxr_linenumber" name="L89" href="#L89">89</a> registry.putIfAbsent(type, converter);
<a class="jxr_linenumber" name="L90" href="#L90">90</a> <strong class="jxr_keyword">return</strong> converter;
<a class="jxr_linenumber" name="L91" href="#L91">91</a> }
<a class="jxr_linenumber" name="L92" href="#L92">92</a> }
<a class="jxr_linenumber" name="L93" href="#L93">93</a> <em class="jxr_comment">// look for compatible converters</em>
<a class="jxr_linenumber" name="L94" href="#L94">94</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> Map.Entry&lt;Type, TypeConverter&lt;?&gt;&gt; entry : registry.entrySet()) {
<a class="jxr_linenumber" name="L95" href="#L95">95</a> <strong class="jxr_keyword">final</strong> Type key = entry.getKey();
<a class="jxr_linenumber" name="L96" href="#L96">96</a> <strong class="jxr_keyword">if</strong> (TypeUtil.isAssignable(type, key)) {
<a class="jxr_linenumber" name="L97" href="#L97">97</a> LOGGER.debug(<span class="jxr_string">"Found compatible TypeConverter&lt;{}&gt; for type [{}]."</span>, key, type);
<a class="jxr_linenumber" name="L98" href="#L98">98</a> <strong class="jxr_keyword">final</strong> TypeConverter&lt;?&gt; value = entry.getValue();
<a class="jxr_linenumber" name="L99" href="#L99">99</a> registry.putIfAbsent(type, value);
<a class="jxr_linenumber" name="L100" href="#L100">100</a> <strong class="jxr_keyword">return</strong> value;
<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> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> UnknownFormatConversionException(type.toString());
<a class="jxr_linenumber" name="L104" href="#L104">104</a> }
<a class="jxr_linenumber" name="L105" href="#L105">105</a>
<a class="jxr_linenumber" name="L106" href="#L106">106</a> <strong class="jxr_keyword">private</strong> <a href="../../../../../../../../org/apache/logging/log4j/core/config/plugins/convert/TypeConverterRegistry.html">TypeConverterRegistry</a>() {
<a class="jxr_linenumber" name="L107" href="#L107">107</a> LOGGER.trace(<span class="jxr_string">"TypeConverterRegistry initializing."</span>);
<a class="jxr_linenumber" name="L108" href="#L108">108</a> <strong class="jxr_keyword">final</strong> <a href="../../../../../../../../org/apache/logging/log4j/core/config/plugins/util/PluginManager.html">PluginManager</a> manager = <strong class="jxr_keyword">new</strong> <a href="../../../../../../../../org/apache/logging/log4j/core/config/plugins/util/PluginManager.html">PluginManager</a>(TypeConverters.CATEGORY);
<a class="jxr_linenumber" name="L109" href="#L109">109</a> manager.collectPlugins();
<a class="jxr_linenumber" name="L110" href="#L110">110</a> loadKnownTypeConverters(manager.getPlugins().values());
<a class="jxr_linenumber" name="L111" href="#L111">111</a> registerPrimitiveTypes();
<a class="jxr_linenumber" name="L112" href="#L112">112</a> }
<a class="jxr_linenumber" name="L113" href="#L113">113</a>
<a class="jxr_linenumber" name="L114" href="#L114">114</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> loadKnownTypeConverters(<strong class="jxr_keyword">final</strong> Collection&lt;PluginType&lt;?&gt;&gt; knownTypes) {
<a class="jxr_linenumber" name="L115" href="#L115">115</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> PluginType&lt;?&gt; knownType : knownTypes) {
<a class="jxr_linenumber" name="L116" href="#L116">116</a> <strong class="jxr_keyword">final</strong> Class&lt;?&gt; clazz = knownType.getPluginClass();
<a class="jxr_linenumber" name="L117" href="#L117">117</a> <strong class="jxr_keyword">if</strong> (TypeConverter.<strong class="jxr_keyword">class</strong>.isAssignableFrom(clazz)) {
<a class="jxr_linenumber" name="L118" href="#L118">118</a> @SuppressWarnings(<span class="jxr_string">"rawtypes"</span>)
<a class="jxr_linenumber" name="L119" href="#L119">119</a> <strong class="jxr_keyword">final</strong> Class&lt;? <strong class="jxr_keyword">extends</strong> TypeConverter&gt; pluginClass = clazz.asSubclass(TypeConverter.<strong class="jxr_keyword">class</strong>);
<a class="jxr_linenumber" name="L120" href="#L120">120</a> <strong class="jxr_keyword">final</strong> Type conversionType = getTypeConverterSupportedType(pluginClass);
<a class="jxr_linenumber" name="L121" href="#L121">121</a> <strong class="jxr_keyword">final</strong> TypeConverter&lt;?&gt; converter = ReflectionUtil.instantiate(pluginClass);
<a class="jxr_linenumber" name="L122" href="#L122">122</a> <strong class="jxr_keyword">if</strong> (registry.putIfAbsent(conversionType, converter) != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="L123" href="#L123">123</a> LOGGER.warn(<span class="jxr_string">"Found a TypeConverter [{}] for type [{}] that already exists."</span>, converter,
<a class="jxr_linenumber" name="L124" href="#L124">124</a> conversionType);
<a class="jxr_linenumber" name="L125" href="#L125">125</a> }
<a class="jxr_linenumber" name="L126" href="#L126">126</a> }
<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> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> Type getTypeConverterSupportedType(@SuppressWarnings(<span class="jxr_string">"rawtypes"</span>) <strong class="jxr_keyword">final</strong> Class&lt;? <strong class="jxr_keyword">extends</strong> TypeConverter&gt; typeConverterClass) {
<a class="jxr_linenumber" name="L131" href="#L131">131</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> Type type : typeConverterClass.getGenericInterfaces()) {
<a class="jxr_linenumber" name="L132" href="#L132">132</a> <strong class="jxr_keyword">if</strong> (type instanceof ParameterizedType) {
<a class="jxr_linenumber" name="L133" href="#L133">133</a> <strong class="jxr_keyword">final</strong> ParameterizedType pType = (ParameterizedType) type;
<a class="jxr_linenumber" name="L134" href="#L134">134</a> <strong class="jxr_keyword">if</strong> (TypeConverter.<strong class="jxr_keyword">class</strong>.equals(pType.getRawType())) {
<a class="jxr_linenumber" name="L135" href="#L135">135</a> <em class="jxr_comment">// TypeConverter&lt;T&gt; has only one type argument (T), so return that</em>
<a class="jxr_linenumber" name="L136" href="#L136">136</a> <strong class="jxr_keyword">return</strong> pType.getActualTypeArguments()[0];
<a class="jxr_linenumber" name="L137" href="#L137">137</a> }
<a class="jxr_linenumber" name="L138" href="#L138">138</a> }
<a class="jxr_linenumber" name="L139" href="#L139">139</a> }
<a class="jxr_linenumber" name="L140" href="#L140">140</a> <strong class="jxr_keyword">return</strong> Void.TYPE;
<a class="jxr_linenumber" name="L141" href="#L141">141</a> }
<a class="jxr_linenumber" name="L142" href="#L142">142</a>
<a class="jxr_linenumber" name="L143" href="#L143">143</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> registerPrimitiveTypes() {
<a class="jxr_linenumber" name="L144" href="#L144">144</a> registerTypeAlias(Boolean.<strong class="jxr_keyword">class</strong>, Boolean.TYPE);
<a class="jxr_linenumber" name="L145" href="#L145">145</a> registerTypeAlias(Byte.<strong class="jxr_keyword">class</strong>, Byte.TYPE);
<a class="jxr_linenumber" name="L146" href="#L146">146</a> registerTypeAlias(Character.<strong class="jxr_keyword">class</strong>, Character.TYPE);
<a class="jxr_linenumber" name="L147" href="#L147">147</a> registerTypeAlias(Double.<strong class="jxr_keyword">class</strong>, Double.TYPE);
<a class="jxr_linenumber" name="L148" href="#L148">148</a> registerTypeAlias(Float.<strong class="jxr_keyword">class</strong>, Float.TYPE);
<a class="jxr_linenumber" name="L149" href="#L149">149</a> registerTypeAlias(Integer.<strong class="jxr_keyword">class</strong>, Integer.TYPE);
<a class="jxr_linenumber" name="L150" href="#L150">150</a> registerTypeAlias(Long.<strong class="jxr_keyword">class</strong>, Long.TYPE);
<a class="jxr_linenumber" name="L151" href="#L151">151</a> registerTypeAlias(Short.<strong class="jxr_keyword">class</strong>, Short.TYPE);
<a class="jxr_linenumber" name="L152" href="#L152">152</a> }
<a class="jxr_linenumber" name="L153" href="#L153">153</a>
<a class="jxr_linenumber" name="L154" href="#L154">154</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> registerTypeAlias(<strong class="jxr_keyword">final</strong> Type knownType, <strong class="jxr_keyword">final</strong> Type aliasType) {
<a class="jxr_linenumber" name="L155" href="#L155">155</a> registry.putIfAbsent(aliasType, registry.get(knownType));
<a class="jxr_linenumber" name="L156" href="#L156">156</a> }
<a class="jxr_linenumber" name="L157" href="#L157">157</a>
<a class="jxr_linenumber" name="L158" href="#L158">158</a> }
</pre>
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