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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<a name="line.2"></a>
<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<span class="sourceLineNo">011</span> *<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing,<a name="line.12"></a>
<span class="sourceLineNo">013</span> * software distributed under the License is distributed on an<a name="line.13"></a>
<span class="sourceLineNo">014</span> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.14"></a>
<span class="sourceLineNo">015</span> * KIND, either express or implied. See the License for the<a name="line.15"></a>
<span class="sourceLineNo">016</span> * specific language governing permissions and limitations<a name="line.16"></a>
<span class="sourceLineNo">017</span> * under the License.<a name="line.17"></a>
<span class="sourceLineNo">018</span> */<a name="line.18"></a>
<span class="sourceLineNo">019</span>package org.apache.felix.ipojo;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.lang.reflect.Member;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.lang.reflect.Method;<a name="line.22"></a>
<span class="sourceLineNo">023</span><a name="line.23"></a>
<span class="sourceLineNo">024</span>import org.apache.felix.ipojo.parser.PojoMetadata;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.apache.felix.ipojo.util.Logger;<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span>/**<a name="line.28"></a>
<span class="sourceLineNo">029</span>* This class defines common mechanisms of primitive handlers.<a name="line.29"></a>
<span class="sourceLineNo">030</span>* Primitive handlers are handler composing the container of primitive<a name="line.30"></a>
<span class="sourceLineNo">031</span>* component instances (declared by the 'component' element inside the<a name="line.31"></a>
<span class="sourceLineNo">032</span>* iPOJO descriptor).<a name="line.32"></a>
<span class="sourceLineNo">033</span>* Note that this class also defines default method implementation.<a name="line.33"></a>
<span class="sourceLineNo">034</span>* Classes overriding this class can change the behavior of those methods.<a name="line.34"></a>
<span class="sourceLineNo">035</span>* @author &lt;a href="mailto:dev@felix.apache.org"&gt;Felix Project Team&lt;/a&gt;<a name="line.35"></a>
<span class="sourceLineNo">036</span>*/<a name="line.36"></a>
<span class="sourceLineNo">037</span>public abstract class PrimitiveHandler extends Handler implements FieldInterceptor, MethodInterceptor,<a name="line.37"></a>
<span class="sourceLineNo">038</span> ConstructorInjector {<a name="line.38"></a>
<span class="sourceLineNo">039</span><a name="line.39"></a>
<span class="sourceLineNo">040</span> /**<a name="line.40"></a>
<span class="sourceLineNo">041</span> * The "Primitive" Handler type (value).<a name="line.41"></a>
<span class="sourceLineNo">042</span> */<a name="line.42"></a>
<span class="sourceLineNo">043</span> public static final String HANDLER_TYPE = "primitive";<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span> /**<a name="line.45"></a>
<span class="sourceLineNo">046</span> * The reference on the instance manager.<a name="line.46"></a>
<span class="sourceLineNo">047</span> */<a name="line.47"></a>
<span class="sourceLineNo">048</span> private InstanceManager m_manager;<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span><a name="line.50"></a>
<span class="sourceLineNo">051</span> /**<a name="line.51"></a>
<span class="sourceLineNo">052</span> * The factory of the instance manager.<a name="line.52"></a>
<span class="sourceLineNo">053</span> */<a name="line.53"></a>
<span class="sourceLineNo">054</span> private ComponentFactory m_factory;<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span> /**<a name="line.56"></a>
<span class="sourceLineNo">057</span> * Instance Logger used by the handler.<a name="line.57"></a>
<span class="sourceLineNo">058</span> */<a name="line.58"></a>
<span class="sourceLineNo">059</span> private Logger m_instanceLogger;<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> * Attaches the current handler to the given instance.<a name="line.62"></a>
<span class="sourceLineNo">063</span> * This method must be called only once, and should not be overridden.<a name="line.63"></a>
<span class="sourceLineNo">064</span> * @param manager the instance on which the current handler will be attached.<a name="line.64"></a>
<span class="sourceLineNo">065</span> * @see org.apache.felix.ipojo.Handler#attach(org.apache.felix.ipojo.ComponentInstance)<a name="line.65"></a>
<span class="sourceLineNo">066</span> */<a name="line.66"></a>
<span class="sourceLineNo">067</span> protected void attach(ComponentInstance manager) {<a name="line.67"></a>
<span class="sourceLineNo">068</span> m_manager = (InstanceManager) manager;<a name="line.68"></a>
<span class="sourceLineNo">069</span> m_instanceLogger = m_manager.getLogger();<a name="line.69"></a>
<span class="sourceLineNo">070</span> }<a name="line.70"></a>
<span class="sourceLineNo">071</span><a name="line.71"></a>
<span class="sourceLineNo">072</span> /**<a name="line.72"></a>
<span class="sourceLineNo">073</span> * Sets the factory of the managed instance.<a name="line.73"></a>
<span class="sourceLineNo">074</span> * @param factory the factory<a name="line.74"></a>
<span class="sourceLineNo">075</span> * @see org.apache.felix.ipojo.Handler#setFactory(org.apache.felix.ipojo.Factory)<a name="line.75"></a>
<span class="sourceLineNo">076</span> */<a name="line.76"></a>
<span class="sourceLineNo">077</span> public final void setFactory(Factory factory) {<a name="line.77"></a>
<span class="sourceLineNo">078</span> m_factory = (ComponentFactory) factory;<a name="line.78"></a>
<span class="sourceLineNo">079</span> }<a name="line.79"></a>
<span class="sourceLineNo">080</span><a name="line.80"></a>
<span class="sourceLineNo">081</span> /**<a name="line.81"></a>
<span class="sourceLineNo">082</span> * Gets the logger of the managed instance.<a name="line.82"></a>
<span class="sourceLineNo">083</span> * IF no instance attached yet, use the factory logger.<a name="line.83"></a>
<span class="sourceLineNo">084</span> * @return the logger to use to log messages.<a name="line.84"></a>
<span class="sourceLineNo">085</span> * @see org.apache.felix.ipojo.Handler#getLogger()<a name="line.85"></a>
<span class="sourceLineNo">086</span> */<a name="line.86"></a>
<span class="sourceLineNo">087</span> public Logger getLogger() {<a name="line.87"></a>
<span class="sourceLineNo">088</span> if (m_instanceLogger == null) {<a name="line.88"></a>
<span class="sourceLineNo">089</span> return m_factory.getLogger();<a name="line.89"></a>
<span class="sourceLineNo">090</span> }<a name="line.90"></a>
<span class="sourceLineNo">091</span> return m_instanceLogger;<a name="line.91"></a>
<span class="sourceLineNo">092</span> }<a name="line.92"></a>
<span class="sourceLineNo">093</span><a name="line.93"></a>
<span class="sourceLineNo">094</span> /**<a name="line.94"></a>
<span class="sourceLineNo">095</span> * Gets the instance manager managing the instance.<a name="line.95"></a>
<span class="sourceLineNo">096</span> * @return the instance manager<a name="line.96"></a>
<span class="sourceLineNo">097</span> */<a name="line.97"></a>
<span class="sourceLineNo">098</span> public InstanceManager getInstanceManager() {<a name="line.98"></a>
<span class="sourceLineNo">099</span> return m_manager;<a name="line.99"></a>
<span class="sourceLineNo">100</span> }<a name="line.100"></a>
<span class="sourceLineNo">101</span><a name="line.101"></a>
<span class="sourceLineNo">102</span> /**<a name="line.102"></a>
<span class="sourceLineNo">103</span> * Gets the factory which creates the managed instance.<a name="line.103"></a>
<span class="sourceLineNo">104</span> * @return the factory which creates the managed instance.<a name="line.104"></a>
<span class="sourceLineNo">105</span> */<a name="line.105"></a>
<span class="sourceLineNo">106</span> public ComponentFactory getFactory() {<a name="line.106"></a>
<span class="sourceLineNo">107</span> return m_factory;<a name="line.107"></a>
<span class="sourceLineNo">108</span> }<a name="line.108"></a>
<span class="sourceLineNo">109</span><a name="line.109"></a>
<span class="sourceLineNo">110</span> /**<a name="line.110"></a>
<span class="sourceLineNo">111</span> * Gets the PojoMetadata of the content of the managed<a name="line.111"></a>
<span class="sourceLineNo">112</span> * instance. This method allows getting manipulation<a name="line.112"></a>
<span class="sourceLineNo">113</span> * metadata.<a name="line.113"></a>
<span class="sourceLineNo">114</span> * @return the information about the content of the<a name="line.114"></a>
<span class="sourceLineNo">115</span> * managed instance.<a name="line.115"></a>
<span class="sourceLineNo">116</span> */<a name="line.116"></a>
<span class="sourceLineNo">117</span> public PojoMetadata getPojoMetadata() {<a name="line.117"></a>
<span class="sourceLineNo">118</span> return m_factory.getPojoMetadata();<a name="line.118"></a>
<span class="sourceLineNo">119</span> }<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> * Gets a plugged handler of the same container.<a name="line.122"></a>
<span class="sourceLineNo">123</span> * This method must be called only in the start method (or after).<a name="line.123"></a>
<span class="sourceLineNo">124</span> * In the configure method, this method can be inconsistent<a name="line.124"></a>
<span class="sourceLineNo">125</span> * as all handlers are not initialized.<a name="line.125"></a>
<span class="sourceLineNo">126</span> * @param name the name of the handler to find (class name or qualified<a name="line.126"></a>
<span class="sourceLineNo">127</span> * handler name (&lt;code&gt;ns:name&lt;/code&gt;)).<a name="line.127"></a>
<span class="sourceLineNo">128</span> * @return the handler object or &lt;code&gt;null&lt;/code&gt; if the handler is not found.<a name="line.128"></a>
<span class="sourceLineNo">129</span> */<a name="line.129"></a>
<span class="sourceLineNo">130</span> public final Handler getHandler(String name) {<a name="line.130"></a>
<span class="sourceLineNo">131</span> return m_manager.getHandler(name);<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> * Callback method called when a managed field<a name="line.135"></a>
<span class="sourceLineNo">136</span> * receives a new value. The given pojo can be<a name="line.136"></a>
<span class="sourceLineNo">137</span> * null if the new value is set by another handler.<a name="line.137"></a>
<span class="sourceLineNo">138</span> * This default implementation does nothing.<a name="line.138"></a>
<span class="sourceLineNo">139</span> * @param pojo the pojo object setting the value<a name="line.139"></a>
<span class="sourceLineNo">140</span> * @param fieldName the field name<a name="line.140"></a>
<span class="sourceLineNo">141</span> * @param value the value received by the field<a name="line.141"></a>
<span class="sourceLineNo">142</span> * @see FieldInterceptor#onSet(Object, String, Object)<a name="line.142"></a>
<span class="sourceLineNo">143</span> */<a name="line.143"></a>
<span class="sourceLineNo">144</span> public void onSet(Object pojo, String fieldName, Object value) {<a name="line.144"></a>
<span class="sourceLineNo">145</span> // Nothing to do in the default implementation<a name="line.145"></a>
<span class="sourceLineNo">146</span> }<a name="line.146"></a>
<span class="sourceLineNo">147</span><a name="line.147"></a>
<span class="sourceLineNo">148</span> /**<a name="line.148"></a>
<span class="sourceLineNo">149</span> * Callback method called when a managed field<a name="line.149"></a>
<span class="sourceLineNo">150</span> * asks for a value.<a name="line.150"></a>
<span class="sourceLineNo">151</span> * The default implementation returned the previously<a name="line.151"></a>
<span class="sourceLineNo">152</span> * injected value.<a name="line.152"></a>
<span class="sourceLineNo">153</span> * @param pojo the pojo object requiring the value<a name="line.153"></a>
<span class="sourceLineNo">154</span> * @param fieldName the field name<a name="line.154"></a>
<span class="sourceLineNo">155</span> * @param value the value passed to the field (by the previous call)<a name="line.155"></a>
<span class="sourceLineNo">156</span> * @return the value to inject, of the previous value if the handler<a name="line.156"></a>
<span class="sourceLineNo">157</span> * don't want to inject a value.<a name="line.157"></a>
<span class="sourceLineNo">158</span> * @see FieldInterceptor#onGet(Object, String, Object)<a name="line.158"></a>
<span class="sourceLineNo">159</span> */<a name="line.159"></a>
<span class="sourceLineNo">160</span> public Object onGet(Object pojo, String fieldName, Object value) {<a name="line.160"></a>
<span class="sourceLineNo">161</span> return value;<a name="line.161"></a>
<span class="sourceLineNo">162</span> }<a name="line.162"></a>
<span class="sourceLineNo">163</span><a name="line.163"></a>
<span class="sourceLineNo">164</span> /**<a name="line.164"></a>
<span class="sourceLineNo">165</span> * Gets the object to inject as a constructor parameter<a name="line.165"></a>
<span class="sourceLineNo">166</span> * @param index the index of the parameter<a name="line.166"></a>
<span class="sourceLineNo">167</span> * @return the object to inject, or &lt;code&gt;null&lt;/code&gt; if no<a name="line.167"></a>
<span class="sourceLineNo">168</span> * objects are injected. This implementation returns &lt;code&gt;null&lt;/code&gt;<a name="line.168"></a>
<span class="sourceLineNo">169</span> * @see org.apache.felix.ipojo.ConstructorInjector#getConstructorParameter(int)<a name="line.169"></a>
<span class="sourceLineNo">170</span> */<a name="line.170"></a>
<span class="sourceLineNo">171</span> public Object getConstructorParameter(int index) {<a name="line.171"></a>
<span class="sourceLineNo">172</span> return null;<a name="line.172"></a>
<span class="sourceLineNo">173</span> }<a name="line.173"></a>
<span class="sourceLineNo">174</span><a name="line.174"></a>
<span class="sourceLineNo">175</span> /**<a name="line.175"></a>
<span class="sourceLineNo">176</span> * Gets the type of the object to inject in the constructor parameter.<a name="line.176"></a>
<span class="sourceLineNo">177</span> * This is the type looked into the Pojo class, so it must match.<a name="line.177"></a>
<span class="sourceLineNo">178</span> * Returning &lt;code&gt;null&lt;/code&gt; will try to get the class from the<a name="line.178"></a>
<span class="sourceLineNo">179</span> * injected object, however this can be wrong (implementation instead of interface,<a name="line.179"></a>
<span class="sourceLineNo">180</span> * boxed objects...) and error-prone.<a name="line.180"></a>
<span class="sourceLineNo">181</span> * @param index the parameter index<a name="line.181"></a>
<span class="sourceLineNo">182</span> * @return the Class object (must fit for primitive type), this implementation<a name="line.182"></a>
<span class="sourceLineNo">183</span> * just returns &lt;code&gt;null&lt;/code&gt;<a name="line.183"></a>
<span class="sourceLineNo">184</span> * @see org.apache.felix.ipojo.ConstructorInjector#getConstructorParameterType(int)<a name="line.184"></a>
<span class="sourceLineNo">185</span> */<a name="line.185"></a>
<span class="sourceLineNo">186</span> public Class getConstructorParameterType(int index) {<a name="line.186"></a>
<span class="sourceLineNo">187</span> return null;<a name="line.187"></a>
<span class="sourceLineNo">188</span> }<a name="line.188"></a>
<span class="sourceLineNo">189</span><a name="line.189"></a>
<span class="sourceLineNo">190</span> /**<a name="line.190"></a>
<span class="sourceLineNo">191</span> * Callback method called when a method will be invoked.<a name="line.191"></a>
<span class="sourceLineNo">192</span> * This default implementation does nothing.<a name="line.192"></a>
<span class="sourceLineNo">193</span> * @param pojo the pojo on which the method is called.<a name="line.193"></a>
<span class="sourceLineNo">194</span> * @param method the method invoked.<a name="line.194"></a>
<span class="sourceLineNo">195</span> * @param args the arguments array.<a name="line.195"></a>
<span class="sourceLineNo">196</span> * @see MethodInterceptor#onEntry(Object, java.lang.reflect.Member, Object[])<a name="line.196"></a>
<span class="sourceLineNo">197</span> */<a name="line.197"></a>
<span class="sourceLineNo">198</span> public void onEntry(Object pojo, Member method, Object[] args) {<a name="line.198"></a>
<span class="sourceLineNo">199</span> // Nothing to do in the default implementation<a name="line.199"></a>
<span class="sourceLineNo">200</span> }<a name="line.200"></a>
<span class="sourceLineNo">201</span><a name="line.201"></a>
<span class="sourceLineNo">202</span> /**<a name="line.202"></a>
<span class="sourceLineNo">203</span> * Callback method called when a method ends.<a name="line.203"></a>
<span class="sourceLineNo">204</span> * This method is called when a thread exits a method (before a return or a throw).<a name="line.204"></a>
<span class="sourceLineNo">205</span> * If the given returned object is &lt;code&gt;null&lt;/code&gt;, either the method is<a name="line.205"></a>
<span class="sourceLineNo">206</span> * &lt;code&gt;void&lt;/code&gt;, or it returns &lt;code&gt;null&lt;/code&gt;.<a name="line.206"></a>
<span class="sourceLineNo">207</span> * You must not modified the returned object.<a name="line.207"></a>
<span class="sourceLineNo">208</span> * The default implementation does nothing.<a name="line.208"></a>
<span class="sourceLineNo">209</span> * @param pojo the pojo on which the method exits.<a name="line.209"></a>
<span class="sourceLineNo">210</span> * @param method the exiting method.<a name="line.210"></a>
<span class="sourceLineNo">211</span> * @param returnedObj the returned object (boxed for primitive type)<a name="line.211"></a>
<span class="sourceLineNo">212</span> * @see MethodInterceptor#onExit(Object, java.lang.reflect.Member, Object)<a name="line.212"></a>
<span class="sourceLineNo">213</span> */<a name="line.213"></a>
<span class="sourceLineNo">214</span> public void onExit(Object pojo, Member method, Object returnedObj) {<a name="line.214"></a>
<span class="sourceLineNo">215</span> // Nothing to do in the default implementation<a name="line.215"></a>
<span class="sourceLineNo">216</span> }<a name="line.216"></a>
<span class="sourceLineNo">217</span><a name="line.217"></a>
<span class="sourceLineNo">218</span> /**<a name="line.218"></a>
<span class="sourceLineNo">219</span> * Callback method called when an error occurs.<a name="line.219"></a>
<span class="sourceLineNo">220</span> * This method is called when the execution throws an exception<a name="line.220"></a>
<span class="sourceLineNo">221</span> * in the given method.<a name="line.221"></a>
<span class="sourceLineNo">222</span> * The default implementation does nothing.<a name="line.222"></a>
<span class="sourceLineNo">223</span> * @param pojo the pojo on which the method was accessed.<a name="line.223"></a>
<span class="sourceLineNo">224</span> * @param method the invoked method.<a name="line.224"></a>
<span class="sourceLineNo">225</span> * @param throwable the thrown exception<a name="line.225"></a>
<span class="sourceLineNo">226</span> * @see org.apache.felix.ipojo.MethodInterceptor#onError(Object, java.lang.reflect.Member, Throwable)<a name="line.226"></a>
<span class="sourceLineNo">227</span> */<a name="line.227"></a>
<span class="sourceLineNo">228</span> public void onError(Object pojo, Member method, Throwable throwable) {<a name="line.228"></a>
<span class="sourceLineNo">229</span> // Nothing to do in the default implementation<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> /**<a name="line.232"></a>
<span class="sourceLineNo">233</span> * Callback method called when the execution of a method will terminate :<a name="line.233"></a>
<span class="sourceLineNo">234</span> * just before to throw an exception or before to return. This callback is called after<a name="line.234"></a>
<span class="sourceLineNo">235</span> * {@link MethodInterceptor#onExit(Object, java.lang.reflect.Member, Object)} and<a name="line.235"></a>
<span class="sourceLineNo">236</span> * {@link MethodInterceptor#onError(Object, java.lang.reflect.Member, Throwable)}<a name="line.236"></a>
<span class="sourceLineNo">237</span> * This default implementation does nothing.<a name="line.237"></a>
<span class="sourceLineNo">238</span> * @param pojo the pojo on which the method was accessed.<a name="line.238"></a>
<span class="sourceLineNo">239</span> * @param method the invoked method.<a name="line.239"></a>
<span class="sourceLineNo">240</span> */<a name="line.240"></a>
<span class="sourceLineNo">241</span> public void onFinally(Object pojo, Member method) {<a name="line.241"></a>
<span class="sourceLineNo">242</span> // Nothing to do in the default implementation<a name="line.242"></a>
<span class="sourceLineNo">243</span> }<a name="line.243"></a>
<span class="sourceLineNo">244</span><a name="line.244"></a>
<span class="sourceLineNo">245</span> /**<a name="line.245"></a>
<span class="sourceLineNo">246</span> * Callback method called when an instance of the component is created, but<a name="line.246"></a>
<span class="sourceLineNo">247</span> * before someone can use it.<a name="line.247"></a>
<span class="sourceLineNo">248</span> * The default implementation does nothing.<a name="line.248"></a>
<span class="sourceLineNo">249</span> * @param instance the created instance<a name="line.249"></a>
<span class="sourceLineNo">250</span> */<a name="line.250"></a>
<span class="sourceLineNo">251</span> public void onCreation(Object instance) {<a name="line.251"></a>
<span class="sourceLineNo">252</span> // Nothing to do in the default implementation<a name="line.252"></a>
<span class="sourceLineNo">253</span> }<a name="line.253"></a>
<span class="sourceLineNo">254</span><a name="line.254"></a>
<span class="sourceLineNo">255</span><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>
</pre>
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