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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.config.plugins.convert;<a name="line.17"></a> |
| <span class="sourceLineNo">018</span><a name="line.18"></a> |
| <span class="sourceLineNo">019</span>import java.lang.reflect.ParameterizedType;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.lang.reflect.Type;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.util.Collection;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.Map;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.Objects;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.UnknownFormatConversionException;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.concurrent.ConcurrentMap;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span><a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.logging.log4j.Logger;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.logging.log4j.core.config.plugins.util.PluginManager;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.logging.log4j.core.config.plugins.util.PluginType;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.logging.log4j.core.util.ReflectionUtil;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.logging.log4j.core.util.TypeUtil;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.logging.log4j.status.StatusLogger;<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> * Registry for {@link TypeConverter} plugins.<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> *<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * @since 2.1<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> */<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>public class TypeConverterRegistry {<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> private static final Logger LOGGER = StatusLogger.getLogger();<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> private static volatile TypeConverterRegistry INSTANCE;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> private static final Object INSTANCE_LOCK = new Object();<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> private final ConcurrentMap<Type, TypeConverter<?>> registry = new ConcurrentHashMap<>();<a name="line.46"></a> |
| <span class="sourceLineNo">047</span><a name="line.47"></a> |
| <span class="sourceLineNo">048</span> /**<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * Gets the singleton instance of the TypeConverterRegistry.<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> *<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * @return the singleton instance.<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> */<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> public static TypeConverterRegistry getInstance() {<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> TypeConverterRegistry result = INSTANCE;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> if (result == null) {<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> synchronized (INSTANCE_LOCK) {<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> result = INSTANCE;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> if (result == null) {<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> INSTANCE = result = new TypeConverterRegistry();<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> }<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> return result;<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> }<a name="line.64"></a> |
| <span class="sourceLineNo">065</span><a name="line.65"></a> |
| <span class="sourceLineNo">066</span> /**<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> * Finds a {@link TypeConverter} for the given {@link Type}, falling back to an assignment-compatible TypeConverter<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> * if none exist for the given type. That is, if the given Type does not have a TypeConverter, but another Type<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> * which can be assigned to the given Type <em>does</em> have a TypeConverter, then that TypeConverter will be<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * used and registered.<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> *<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * @param type the Type to find a TypeConverter for (must not be {@code null}).<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * @return a TypeConverter for the given Type.<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * @throws UnknownFormatConversionException if no TypeConverter can be found for the given type.<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> */<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> public TypeConverter<?> findCompatibleConverter(final Type type) {<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> Objects.requireNonNull(type, "No type was provided");<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> final TypeConverter<?> primary = registry.get(type);<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> // cached type converters<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> if (primary != null) {<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> return primary;<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> }<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> // dynamic enum support<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> if (type instanceof Class<?>) {<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> final Class<?> clazz = (Class<?>) type;<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> if (clazz.isEnum()) {<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> @SuppressWarnings({"unchecked","rawtypes"})<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> final EnumConverter<? extends Enum> converter = new EnumConverter(clazz.asSubclass(Enum.class));<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> registry.putIfAbsent(type, converter);<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> return converter;<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> // look for compatible converters<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> for (final Map.Entry<Type, TypeConverter<?>> entry : registry.entrySet()) {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> final Type key = entry.getKey();<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> if (TypeUtil.isAssignable(type, key)) {<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> LOGGER.debug("Found compatible TypeConverter<{}> for type [{}].", key, type);<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> final TypeConverter<?> value = entry.getValue();<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> registry.putIfAbsent(type, value);<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> return value;<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> throw new UnknownFormatConversionException(type.toString());<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> }<a name="line.104"></a> |
| <span class="sourceLineNo">105</span><a name="line.105"></a> |
| <span class="sourceLineNo">106</span> private TypeConverterRegistry() {<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> LOGGER.trace("TypeConverterRegistry initializing.");<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> final PluginManager manager = new PluginManager(TypeConverters.CATEGORY);<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> manager.collectPlugins();<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> loadKnownTypeConverters(manager.getPlugins().values());<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> registerPrimitiveTypes();<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> private void loadKnownTypeConverters(final Collection<PluginType<?>> knownTypes) {<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> for (final PluginType<?> knownType : knownTypes) {<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> final Class<?> clazz = knownType.getPluginClass();<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> if (TypeConverter.class.isAssignableFrom(clazz)) {<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> @SuppressWarnings("rawtypes")<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> final Class<? extends TypeConverter> pluginClass = clazz.asSubclass(TypeConverter.class);<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> final Type conversionType = getTypeConverterSupportedType(pluginClass);<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> final TypeConverter<?> converter = ReflectionUtil.instantiate(pluginClass);<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> if (registry.putIfAbsent(conversionType, converter) != null) {<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> LOGGER.warn("Found a TypeConverter [{}] for type [{}] that already exists.", converter,<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> conversionType);<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> }<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> }<a name="line.128"></a> |
| <span class="sourceLineNo">129</span><a name="line.129"></a> |
| <span class="sourceLineNo">130</span> private static Type getTypeConverterSupportedType(@SuppressWarnings("rawtypes") final Class<? extends TypeConverter> typeConverterClass) {<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> for (final Type type : typeConverterClass.getGenericInterfaces()) {<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> if (type instanceof ParameterizedType) {<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> final ParameterizedType pType = (ParameterizedType) type;<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> if (TypeConverter.class.equals(pType.getRawType())) {<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> // TypeConverter<T> has only one type argument (T), so return that<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> return pType.getActualTypeArguments()[0];<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> }<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> }<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> }<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> return Void.TYPE;<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> private void registerPrimitiveTypes() {<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> registerTypeAlias(Boolean.class, Boolean.TYPE);<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> registerTypeAlias(Byte.class, Byte.TYPE);<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> registerTypeAlias(Character.class, Character.TYPE);<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> registerTypeAlias(Double.class, Double.TYPE);<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> registerTypeAlias(Float.class, Float.TYPE);<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> registerTypeAlias(Integer.class, Integer.TYPE);<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> registerTypeAlias(Long.class, Long.TYPE);<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> registerTypeAlias(Short.class, Short.TYPE);<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> }<a name="line.152"></a> |
| <span class="sourceLineNo">153</span><a name="line.153"></a> |
| <span class="sourceLineNo">154</span> private void registerTypeAlias(final Type knownType, final Type aliasType) {<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> registry.putIfAbsent(aliasType, registry.get(knownType));<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> }<a name="line.156"></a> |
| <span class="sourceLineNo">157</span><a name="line.157"></a> |
| <span class="sourceLineNo">158</span>}<a name="line.158"></a> |
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| </pre> |
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