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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> */<a name="line.19"></a>
<span class="sourceLineNo">020</span>package org.apache.mina.statemachine;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.lang.reflect.InvocationHandler;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.lang.reflect.Method;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.lang.reflect.Proxy;<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.apache.mina.statemachine.context.SingletonStateContextLookup;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.mina.statemachine.context.StateContext;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.mina.statemachine.context.StateContextLookup;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.mina.statemachine.event.DefaultEventFactory;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.mina.statemachine.event.Event;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.mina.statemachine.event.EventArgumentsInterceptor;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.mina.statemachine.event.EventFactory;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.mina.statemachine.event.UnhandledEventException;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.slf4j.Logger;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.slf4j.LoggerFactory;<a name="line.35"></a>
<span class="sourceLineNo">036</span><a name="line.36"></a>
<span class="sourceLineNo">037</span>/**<a name="line.37"></a>
<span class="sourceLineNo">038</span> * Used to create proxies which will forward all method calls on them to a<a name="line.38"></a>
<span class="sourceLineNo">039</span> * {@link StateMachine}.<a name="line.39"></a>
<span class="sourceLineNo">040</span> *<a name="line.40"></a>
<span class="sourceLineNo">041</span> * @author &lt;a href="http://mina.apache.org"&gt;Apache MINA Project&lt;/a&gt;<a name="line.41"></a>
<span class="sourceLineNo">042</span> */<a name="line.42"></a>
<span class="sourceLineNo">043</span>public class StateMachineProxyBuilder {<a name="line.43"></a>
<span class="sourceLineNo">044</span> private static final Logger log = LoggerFactory.getLogger(StateMachineProxyBuilder.class);<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span> private static final Object[] EMPTY_ARGUMENTS = new Object[0];<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span> private StateContextLookup contextLookup = new SingletonStateContextLookup();<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span> private EventFactory eventFactory = new DefaultEventFactory();<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span> private EventArgumentsInterceptor interceptor = null;<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span> private boolean ignoreUnhandledEvents = false;<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span> private boolean ignoreStateContextLookupFailure = false;<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span> private String name = null;<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span> /*<a name="line.60"></a>
<span class="sourceLineNo">061</span> * The classloader to use. Iif null we will use the current thread's <a name="line.61"></a>
<span class="sourceLineNo">062</span> * context classloader.<a name="line.62"></a>
<span class="sourceLineNo">063</span> */<a name="line.63"></a>
<span class="sourceLineNo">064</span> private ClassLoader defaultCl = null;<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span> public StateMachineProxyBuilder() {<a name="line.66"></a>
<span class="sourceLineNo">067</span> }<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> * Sets the name of the proxy created by this builder. This will be used <a name="line.70"></a>
<span class="sourceLineNo">071</span> * by the proxies &lt;code&gt;toString()&lt;/code&gt; method. If not specified a default<a name="line.71"></a>
<span class="sourceLineNo">072</span> * auto generated name will be used.<a name="line.72"></a>
<span class="sourceLineNo">073</span> * <a name="line.73"></a>
<span class="sourceLineNo">074</span> * @param name the name.<a name="line.74"></a>
<span class="sourceLineNo">075</span> * @return this {@link StateMachineProxyBuilder} for method chaining.<a name="line.75"></a>
<span class="sourceLineNo">076</span> */<a name="line.76"></a>
<span class="sourceLineNo">077</span> public StateMachineProxyBuilder setName(String name) {<a name="line.77"></a>
<span class="sourceLineNo">078</span> this.name = name;<a name="line.78"></a>
<span class="sourceLineNo">079</span> return this;<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> /**<a name="line.82"></a>
<span class="sourceLineNo">083</span> * Sets the {@link StateContextLookup} to be used. The default is to use<a name="line.83"></a>
<span class="sourceLineNo">084</span> * a {@link SingletonStateContextLookup}.<a name="line.84"></a>
<span class="sourceLineNo">085</span> * <a name="line.85"></a>
<span class="sourceLineNo">086</span> * @param contextLookup the {@link StateContextLookup} to use.<a name="line.86"></a>
<span class="sourceLineNo">087</span> * @return this {@link StateMachineProxyBuilder} for method chaining. <a name="line.87"></a>
<span class="sourceLineNo">088</span> */<a name="line.88"></a>
<span class="sourceLineNo">089</span> public StateMachineProxyBuilder setStateContextLookup(StateContextLookup contextLookup) {<a name="line.89"></a>
<span class="sourceLineNo">090</span> this.contextLookup = contextLookup;<a name="line.90"></a>
<span class="sourceLineNo">091</span> return this;<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> * Sets the {@link EventFactory} to be used. The default is to use a <a name="line.95"></a>
<span class="sourceLineNo">096</span> * {@link DefaultEventFactory}.<a name="line.96"></a>
<span class="sourceLineNo">097</span> * <a name="line.97"></a>
<span class="sourceLineNo">098</span> * @param eventFactory the {@link EventFactory} to use.<a name="line.98"></a>
<span class="sourceLineNo">099</span> * @return this {@link StateMachineProxyBuilder} for method chaining.<a name="line.99"></a>
<span class="sourceLineNo">100</span> */<a name="line.100"></a>
<span class="sourceLineNo">101</span> public StateMachineProxyBuilder setEventFactory(EventFactory eventFactory) {<a name="line.101"></a>
<span class="sourceLineNo">102</span> this.eventFactory = eventFactory;<a name="line.102"></a>
<span class="sourceLineNo">103</span> return this;<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> /**<a name="line.106"></a>
<span class="sourceLineNo">107</span> * Sets the {@link EventArgumentsInterceptor} to be used. By default no<a name="line.107"></a>
<span class="sourceLineNo">108</span> * {@link EventArgumentsInterceptor} will be used.<a name="line.108"></a>
<span class="sourceLineNo">109</span> * <a name="line.109"></a>
<span class="sourceLineNo">110</span> * @param interceptor the {@link EventArgumentsInterceptor} to use.<a name="line.110"></a>
<span class="sourceLineNo">111</span> * @return this {@link StateMachineProxyBuilder} for method chaining.<a name="line.111"></a>
<span class="sourceLineNo">112</span> */<a name="line.112"></a>
<span class="sourceLineNo">113</span> public StateMachineProxyBuilder setEventArgumentsInterceptor(EventArgumentsInterceptor interceptor) {<a name="line.113"></a>
<span class="sourceLineNo">114</span> this.interceptor = interceptor;<a name="line.114"></a>
<span class="sourceLineNo">115</span> return this;<a name="line.115"></a>
<span class="sourceLineNo">116</span> }<a name="line.116"></a>
<span class="sourceLineNo">117</span><a name="line.117"></a>
<span class="sourceLineNo">118</span> /**<a name="line.118"></a>
<span class="sourceLineNo">119</span> * Sets whether events which have no handler in the current state will raise <a name="line.119"></a>
<span class="sourceLineNo">120</span> * an exception or be silently ignored. The default is to raise an <a name="line.120"></a>
<span class="sourceLineNo">121</span> * exception. <a name="line.121"></a>
<span class="sourceLineNo">122</span> * <a name="line.122"></a>
<span class="sourceLineNo">123</span> * @param b &lt;tt&gt;true&lt;/tt&gt; to ignore context lookup failures.<a name="line.123"></a>
<span class="sourceLineNo">124</span> * @return this {@link StateMachineProxyBuilder} for method chaining. <a name="line.124"></a>
<span class="sourceLineNo">125</span> */<a name="line.125"></a>
<span class="sourceLineNo">126</span> public StateMachineProxyBuilder setIgnoreUnhandledEvents(boolean b) {<a name="line.126"></a>
<span class="sourceLineNo">127</span> this.ignoreUnhandledEvents = b;<a name="line.127"></a>
<span class="sourceLineNo">128</span> return this;<a name="line.128"></a>
<span class="sourceLineNo">129</span> }<a name="line.129"></a>
<span class="sourceLineNo">130</span><a name="line.130"></a>
<span class="sourceLineNo">131</span> /**<a name="line.131"></a>
<span class="sourceLineNo">132</span> * Sets whether the failure to lookup a {@link StateContext} corresponding<a name="line.132"></a>
<span class="sourceLineNo">133</span> * to a method call on the proxy produced by this builder will raise an<a name="line.133"></a>
<span class="sourceLineNo">134</span> * exception or be silently ignored. The default is to raise an exception.<a name="line.134"></a>
<span class="sourceLineNo">135</span> * <a name="line.135"></a>
<span class="sourceLineNo">136</span> * @param b &lt;tt&gt;true&lt;/tt&gt; to ignore context lookup failures.<a name="line.136"></a>
<span class="sourceLineNo">137</span> * @return this {@link StateMachineProxyBuilder} for method chaining. <a name="line.137"></a>
<span class="sourceLineNo">138</span> */<a name="line.138"></a>
<span class="sourceLineNo">139</span> public StateMachineProxyBuilder setIgnoreStateContextLookupFailure(boolean b) {<a name="line.139"></a>
<span class="sourceLineNo">140</span> this.ignoreStateContextLookupFailure = b;<a name="line.140"></a>
<span class="sourceLineNo">141</span> return this;<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> /**<a name="line.144"></a>
<span class="sourceLineNo">145</span> * Sets the class loader to use for instantiating proxies. The default is<a name="line.145"></a>
<span class="sourceLineNo">146</span> * to use the current threads context {@link ClassLoader} as returned by <a name="line.146"></a>
<span class="sourceLineNo">147</span> * {@link Thread#getContextClassLoader()}.<a name="line.147"></a>
<span class="sourceLineNo">148</span> * <a name="line.148"></a>
<span class="sourceLineNo">149</span> * @param cl the class loader<a name="line.149"></a>
<span class="sourceLineNo">150</span> * @return this {@link StateMachineProxyBuilder} for method chaining. <a name="line.150"></a>
<span class="sourceLineNo">151</span> */<a name="line.151"></a>
<span class="sourceLineNo">152</span> public StateMachineProxyBuilder setClassLoader(ClassLoader cl) {<a name="line.152"></a>
<span class="sourceLineNo">153</span> this.defaultCl = cl;<a name="line.153"></a>
<span class="sourceLineNo">154</span> return this;<a name="line.154"></a>
<span class="sourceLineNo">155</span> }<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> * Creates a proxy for the specified interface and which uses the specified <a name="line.158"></a>
<span class="sourceLineNo">159</span> * {@link StateMachine}.<a name="line.159"></a>
<span class="sourceLineNo">160</span> * <a name="line.160"></a>
<span class="sourceLineNo">161</span> * @param &lt;T&gt; The specified interface type<a name="line.161"></a>
<span class="sourceLineNo">162</span> * @param iface the interface the proxy will implement.<a name="line.162"></a>
<span class="sourceLineNo">163</span> * @param sm the {@link StateMachine} which will receive the events <a name="line.163"></a>
<span class="sourceLineNo">164</span> * generated by the method calls on the proxy.<a name="line.164"></a>
<span class="sourceLineNo">165</span> * @return the proxy object.<a name="line.165"></a>
<span class="sourceLineNo">166</span> */<a name="line.166"></a>
<span class="sourceLineNo">167</span> @SuppressWarnings("unchecked")<a name="line.167"></a>
<span class="sourceLineNo">168</span> public &lt;T&gt; T create(Class&lt;T&gt; iface, StateMachine sm) {<a name="line.168"></a>
<span class="sourceLineNo">169</span> return (T) create(new Class[] { iface }, sm);<a name="line.169"></a>
<span class="sourceLineNo">170</span> }<a name="line.170"></a>
<span class="sourceLineNo">171</span><a name="line.171"></a>
<span class="sourceLineNo">172</span> /**<a name="line.172"></a>
<span class="sourceLineNo">173</span> * Creates a proxy for the specified interfaces and which uses the specified <a name="line.173"></a>
<span class="sourceLineNo">174</span> * {@link StateMachine}.<a name="line.174"></a>
<span class="sourceLineNo">175</span> * <a name="line.175"></a>
<span class="sourceLineNo">176</span> * @param ifaces the interfaces the proxy will implement.<a name="line.176"></a>
<span class="sourceLineNo">177</span> * @param sm the {@link StateMachine} which will receive the events <a name="line.177"></a>
<span class="sourceLineNo">178</span> * generated by the method calls on the proxy.<a name="line.178"></a>
<span class="sourceLineNo">179</span> * @return the proxy object.<a name="line.179"></a>
<span class="sourceLineNo">180</span> */<a name="line.180"></a>
<span class="sourceLineNo">181</span> public Object create(Class&lt;?&gt;[] ifaces, StateMachine sm) {<a name="line.181"></a>
<span class="sourceLineNo">182</span> ClassLoader cl = defaultCl;<a name="line.182"></a>
<span class="sourceLineNo">183</span> if (cl == null) {<a name="line.183"></a>
<span class="sourceLineNo">184</span> cl = Thread.currentThread().getContextClassLoader();<a name="line.184"></a>
<span class="sourceLineNo">185</span> }<a name="line.185"></a>
<span class="sourceLineNo">186</span><a name="line.186"></a>
<span class="sourceLineNo">187</span> InvocationHandler handler = new MethodInvocationHandler(sm, contextLookup, interceptor, eventFactory,<a name="line.187"></a>
<span class="sourceLineNo">188</span> ignoreUnhandledEvents, ignoreStateContextLookupFailure, name);<a name="line.188"></a>
<span class="sourceLineNo">189</span><a name="line.189"></a>
<span class="sourceLineNo">190</span> return Proxy.newProxyInstance(cl, ifaces, handler);<a name="line.190"></a>
<span class="sourceLineNo">191</span> }<a name="line.191"></a>
<span class="sourceLineNo">192</span><a name="line.192"></a>
<span class="sourceLineNo">193</span> private static class MethodInvocationHandler implements InvocationHandler {<a name="line.193"></a>
<span class="sourceLineNo">194</span> private final StateMachine sm;<a name="line.194"></a>
<span class="sourceLineNo">195</span><a name="line.195"></a>
<span class="sourceLineNo">196</span> private final StateContextLookup contextLookup;<a name="line.196"></a>
<span class="sourceLineNo">197</span><a name="line.197"></a>
<span class="sourceLineNo">198</span> private final EventArgumentsInterceptor interceptor;<a name="line.198"></a>
<span class="sourceLineNo">199</span><a name="line.199"></a>
<span class="sourceLineNo">200</span> private final EventFactory eventFactory;<a name="line.200"></a>
<span class="sourceLineNo">201</span><a name="line.201"></a>
<span class="sourceLineNo">202</span> private final boolean ignoreUnhandledEvents;<a name="line.202"></a>
<span class="sourceLineNo">203</span><a name="line.203"></a>
<span class="sourceLineNo">204</span> private final boolean ignoreStateContextLookupFailure;<a name="line.204"></a>
<span class="sourceLineNo">205</span><a name="line.205"></a>
<span class="sourceLineNo">206</span> private final String name;<a name="line.206"></a>
<span class="sourceLineNo">207</span><a name="line.207"></a>
<span class="sourceLineNo">208</span> public MethodInvocationHandler(StateMachine sm, StateContextLookup contextLookup,<a name="line.208"></a>
<span class="sourceLineNo">209</span> EventArgumentsInterceptor interceptor, EventFactory eventFactory, boolean ignoreUnhandledEvents,<a name="line.209"></a>
<span class="sourceLineNo">210</span> boolean ignoreStateContextLookupFailure, String name) {<a name="line.210"></a>
<span class="sourceLineNo">211</span><a name="line.211"></a>
<span class="sourceLineNo">212</span> this.contextLookup = contextLookup;<a name="line.212"></a>
<span class="sourceLineNo">213</span> this.sm = sm;<a name="line.213"></a>
<span class="sourceLineNo">214</span> this.interceptor = interceptor;<a name="line.214"></a>
<span class="sourceLineNo">215</span> this.eventFactory = eventFactory;<a name="line.215"></a>
<span class="sourceLineNo">216</span> this.ignoreUnhandledEvents = ignoreUnhandledEvents;<a name="line.216"></a>
<span class="sourceLineNo">217</span> this.ignoreStateContextLookupFailure = ignoreStateContextLookupFailure;<a name="line.217"></a>
<span class="sourceLineNo">218</span> this.name = name;<a name="line.218"></a>
<span class="sourceLineNo">219</span> }<a name="line.219"></a>
<span class="sourceLineNo">220</span><a name="line.220"></a>
<span class="sourceLineNo">221</span> public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {<a name="line.221"></a>
<span class="sourceLineNo">222</span> if ("hashCode".equals(method.getName()) &amp;&amp; args == null) {<a name="line.222"></a>
<span class="sourceLineNo">223</span> return Integer.valueOf(System.identityHashCode(proxy));<a name="line.223"></a>
<span class="sourceLineNo">224</span> }<a name="line.224"></a>
<span class="sourceLineNo">225</span> if ("equals".equals(method.getName()) &amp;&amp; args.length == 1) {<a name="line.225"></a>
<span class="sourceLineNo">226</span> return Boolean.valueOf(proxy == args[0]);<a name="line.226"></a>
<span class="sourceLineNo">227</span> }<a name="line.227"></a>
<span class="sourceLineNo">228</span> if ("toString".equals(method.getName()) &amp;&amp; args == null) {<a name="line.228"></a>
<span class="sourceLineNo">229</span> return (name != null ? name : proxy.getClass().getName()) + "@"<a name="line.229"></a>
<span class="sourceLineNo">230</span> + Integer.toHexString(System.identityHashCode(proxy));<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> if (log.isDebugEnabled()) {<a name="line.233"></a>
<span class="sourceLineNo">234</span> log.debug("Method invoked: " + method);<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> args = args == null ? EMPTY_ARGUMENTS : args;<a name="line.237"></a>
<span class="sourceLineNo">238</span> if (interceptor != null) {<a name="line.238"></a>
<span class="sourceLineNo">239</span> args = interceptor.modify(args);<a name="line.239"></a>
<span class="sourceLineNo">240</span> }<a name="line.240"></a>
<span class="sourceLineNo">241</span><a name="line.241"></a>
<span class="sourceLineNo">242</span> StateContext context = contextLookup.lookup(args);<a name="line.242"></a>
<span class="sourceLineNo">243</span><a name="line.243"></a>
<span class="sourceLineNo">244</span> if (context == null) {<a name="line.244"></a>
<span class="sourceLineNo">245</span> if (ignoreStateContextLookupFailure) {<a name="line.245"></a>
<span class="sourceLineNo">246</span> return null;<a name="line.246"></a>
<span class="sourceLineNo">247</span> }<a name="line.247"></a>
<span class="sourceLineNo">248</span> throw new IllegalStateException("Cannot determine state " + "context for method invocation: " + method);<a name="line.248"></a>
<span class="sourceLineNo">249</span> }<a name="line.249"></a>
<span class="sourceLineNo">250</span><a name="line.250"></a>
<span class="sourceLineNo">251</span> Event event = eventFactory.create(context, method, args);<a name="line.251"></a>
<span class="sourceLineNo">252</span><a name="line.252"></a>
<span class="sourceLineNo">253</span> try {<a name="line.253"></a>
<span class="sourceLineNo">254</span> sm.handle(event);<a name="line.254"></a>
<span class="sourceLineNo">255</span> } catch (UnhandledEventException uee) {<a name="line.255"></a>
<span class="sourceLineNo">256</span> if (!ignoreUnhandledEvents) {<a name="line.256"></a>
<span class="sourceLineNo">257</span> throw uee;<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><a name="line.260"></a>
<span class="sourceLineNo">261</span> return null;<a name="line.261"></a>
<span class="sourceLineNo">262</span> }<a name="line.262"></a>
<span class="sourceLineNo">263</span> }<a name="line.263"></a>
<span class="sourceLineNo">264</span>}<a name="line.264"></a>
</pre>
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