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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.annotation.Annotation;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.lang.reflect.Field;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.lang.reflect.Method;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.lang.reflect.Modifier;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.ArrayList;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.Arrays;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.Comparator;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import java.util.HashMap;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import java.util.LinkedHashMap;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import java.util.LinkedList;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import java.util.List;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import java.util.Map;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span><a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.mina.statemachine.annotation.OnEntry;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.mina.statemachine.annotation.OnExit;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.mina.statemachine.annotation.Transition;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.mina.statemachine.annotation.TransitionAnnotation;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.apache.mina.statemachine.annotation.Transitions;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.mina.statemachine.event.Event;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.apache.mina.statemachine.transition.MethodSelfTransition;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import org.apache.mina.statemachine.transition.MethodTransition;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import org.apache.mina.statemachine.transition.SelfTransition;<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> * Creates {@link StateMachine}s by reading {@link org.apache.mina.statemachine.annotation.State},<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * {@link Transition} and {@link Transitions} (or equivalent) and {@link SelfTransition} annotations from one or more arbitrary<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * objects.<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> * @author <a href="http://mina.apache.org">Apache MINA Project</a><a name="line.51"></a> |
| <span class="sourceLineNo">052</span> */<a name="line.52"></a> |
| <span class="sourceLineNo">053</span>public class StateMachineFactory {<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> private final Class<? extends Annotation> transitionAnnotation;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span><a name="line.55"></a> |
| <span class="sourceLineNo">056</span> private final Class<? extends Annotation> transitionsAnnotation;<a name="line.56"></a> |
| <span class="sourceLineNo">057</span><a name="line.57"></a> |
| <span class="sourceLineNo">058</span> private final Class<? extends Annotation> entrySelfTransitionsAnnotation;<a name="line.58"></a> |
| <span class="sourceLineNo">059</span><a name="line.59"></a> |
| <span class="sourceLineNo">060</span> private final Class<? extends Annotation> exitSelfTransitionsAnnotation;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span><a name="line.61"></a> |
| <span class="sourceLineNo">062</span> protected StateMachineFactory(Class<? extends Annotation> transitionAnnotation,<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> Class<? extends Annotation> transitionsAnnotation,<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> Class<? extends Annotation> entrySelfTransitionsAnnotation,<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> Class<? extends Annotation> exitSelfTransitionsAnnotation) {<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> this.transitionAnnotation = transitionAnnotation;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> this.transitionsAnnotation = transitionsAnnotation;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> this.entrySelfTransitionsAnnotation = entrySelfTransitionsAnnotation;<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> this.exitSelfTransitionsAnnotation = exitSelfTransitionsAnnotation;<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> * Returns a new {@link StateMachineFactory} instance which creates<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * {@link StateMachine}s by reading the specified {@link Transition}<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * equivalent annotation.<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * <a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * @param transitionAnnotation the {@link Transition} equivalent annotation.<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * @return the {@link StateMachineFactory}.<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> */<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> public static StateMachineFactory getInstance(Class<? extends Annotation> transitionAnnotation) {<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> TransitionAnnotation a = transitionAnnotation.getAnnotation(TransitionAnnotation.class);<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> if (a == null) {<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> throw new IllegalArgumentException("The annotation class " + transitionAnnotation<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> + " has not been annotated with the " + TransitionAnnotation.class.getName() + " annotation");<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> }<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> return new StateMachineFactory(transitionAnnotation, a.value(), OnEntry.class, OnExit.class);<a name="line.86"></a> |
| <span class="sourceLineNo">087</span><a name="line.87"></a> |
| <span class="sourceLineNo">088</span> }<a name="line.88"></a> |
| <span class="sourceLineNo">089</span><a name="line.89"></a> |
| <span class="sourceLineNo">090</span> /**<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> * Creates a new {@link StateMachine} from the specified handler object and<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> * using a start state with id <code>start</code>.<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> * <a name="line.93"></a> |
| <span class="sourceLineNo">094</span> * @param handler the object containing the annotations describing the<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> * state machine.<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> * @return the {@link StateMachine} object.<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> */<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> public StateMachine create(Object handler) {<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> return create(handler, new Object[0]);<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> * Creates a new {@link StateMachine} from the specified handler object and<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> * using the {@link State} with the specified id as start state.<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> * <a name="line.105"></a> |
| <span class="sourceLineNo">106</span> * @param start the id of the start {@link State} to use.<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> * @param handler the object containing the annotations describing the<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> * state machine.<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> * @return the {@link StateMachine} object.<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> */<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> public StateMachine create(String start, Object handler) {<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> return create(start, handler, new Object[0]);<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> }<a name="line.113"></a> |
| <span class="sourceLineNo">114</span><a name="line.114"></a> |
| <span class="sourceLineNo">115</span> /**<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> * Creates a new {@link StateMachine} from the specified handler objects and<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> * using a start state with id <code>start</code>.<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> * <a name="line.118"></a> |
| <span class="sourceLineNo">119</span> * @param handler the first object containing the annotations describing the<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> * state machine.<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> * @param handlers zero or more additional objects containing the<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> * annotations describing the state machine.<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> * @return the {@link StateMachine} object.<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> */<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> public StateMachine create(Object handler, Object... handlers) {<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> return create("start", handler, handlers);<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> * Creates a new {@link StateMachine} from the specified handler objects and<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> * using the {@link State} with the specified id as start state.<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> * <a name="line.132"></a> |
| <span class="sourceLineNo">133</span> * @param start the id of the start {@link State} to use.<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> * @param handler the first object containing the annotations describing the<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> * state machine.<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> * @param handlers zero or more additional objects containing the<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> * annotations describing the state machine.<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> * @return the {@link StateMachine} object.<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> */<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> public StateMachine create(String start, Object handler, Object... handlers) {<a name="line.140"></a> |
| <span class="sourceLineNo">141</span><a name="line.141"></a> |
| <span class="sourceLineNo">142</span> Map<String, State> states = new HashMap<String, State>();<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> List<Object> handlersList = new ArrayList<Object>(1 + handlers.length);<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> handlersList.add(handler);<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> handlersList.addAll(Arrays.asList(handlers));<a name="line.145"></a> |
| <span class="sourceLineNo">146</span><a name="line.146"></a> |
| <span class="sourceLineNo">147</span> LinkedList<Field> fields = new LinkedList<Field>();<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> for (Object h : handlersList) {<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> fields.addAll(getFields(h instanceof Class ? (Class<?>) h : h.getClass()));<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> }<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> for (State state : createStates(fields)) {<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> states.put(state.getId(), state);<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> }<a name="line.153"></a> |
| <span class="sourceLineNo">154</span><a name="line.154"></a> |
| <span class="sourceLineNo">155</span> if (!states.containsKey(start)) {<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> throw new StateMachineCreationException("Start state '" + start + "' not found.");<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> |
| <span class="sourceLineNo">159</span> setupTransitions(transitionAnnotation, transitionsAnnotation, entrySelfTransitionsAnnotation,<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> exitSelfTransitionsAnnotation, states, handlersList);<a name="line.160"></a> |
| <span class="sourceLineNo">161</span><a name="line.161"></a> |
| <span class="sourceLineNo">162</span> return new StateMachine(states.values(), start);<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> private static void setupTransitions(Class<? extends Annotation> transitionAnnotation,<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> Class<? extends Annotation> transitionsAnnotation,<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> Class<? extends Annotation> onEntrySelfTransitionAnnotation,<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> Class<? extends Annotation> onExitSelfTransitionAnnotation, Map<String, State> states, List<Object> handlers) {<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> for (Object handler : handlers) {<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> setupTransitions(transitionAnnotation, transitionsAnnotation, onEntrySelfTransitionAnnotation,<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> onExitSelfTransitionAnnotation, states, handler);<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> }<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> private static void setupSelfTransitions(Method m, Class<? extends Annotation> onEntrySelfTransitionAnnotation,<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> Class<? extends Annotation> onExitSelfTransitionAnnotation, Map<String, State> states, Object handler) {<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> if (m.isAnnotationPresent(OnEntry.class)) {<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> OnEntry onEntryAnnotation = (OnEntry) m.getAnnotation(onEntrySelfTransitionAnnotation);<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> State state = states.get(onEntryAnnotation.value());<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> if (state == null) {<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> throw new StateMachineCreationException("Error encountered "<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> + "when processing onEntry annotation in method " + m + ". state " + onEntryAnnotation.value()<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> + " not Found.");<a name="line.183"></a> |
| <span class="sourceLineNo">184</span><a name="line.184"></a> |
| <span class="sourceLineNo">185</span> }<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> state.addOnEntrySelfTransaction(new MethodSelfTransition(m, handler));<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> }<a name="line.187"></a> |
| <span class="sourceLineNo">188</span><a name="line.188"></a> |
| <span class="sourceLineNo">189</span> if (m.isAnnotationPresent(OnExit.class)) {<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> OnExit onExitAnnotation = (OnExit) m.getAnnotation(onExitSelfTransitionAnnotation);<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> State state = states.get(onExitAnnotation.value());<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> if (state == null) {<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> throw new StateMachineCreationException("Error encountered "<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> + "when processing onExit annotation in method " + m + ". state " + onExitAnnotation.value()<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> + " not Found.");<a name="line.195"></a> |
| <span class="sourceLineNo">196</span><a name="line.196"></a> |
| <span class="sourceLineNo">197</span> }<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> state.addOnExitSelfTransaction(new MethodSelfTransition(m, handler));<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> }<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> private static void setupTransitions(Class<? extends Annotation> transitionAnnotation,<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> Class<? extends Annotation> transitionsAnnotation,<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> Class<? extends Annotation> onEntrySelfTransitionAnnotation,<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> Class<? extends Annotation> onExitSelfTransitionAnnotation, Map<String, State> states, Object handler) {<a name="line.206"></a> |
| <span class="sourceLineNo">207</span><a name="line.207"></a> |
| <span class="sourceLineNo">208</span> Method[] methods = handler.getClass().getDeclaredMethods();<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> Arrays.sort(methods, new Comparator<Method>() {<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> public int compare(Method m1, Method m2) {<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> return m1.toString().compareTo(m2.toString());<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> }<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> });<a name="line.213"></a> |
| <span class="sourceLineNo">214</span><a name="line.214"></a> |
| <span class="sourceLineNo">215</span> for (Method m : methods) {<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> setupSelfTransitions(m, onEntrySelfTransitionAnnotation, onExitSelfTransitionAnnotation, states, handler);<a name="line.216"></a> |
| <span class="sourceLineNo">217</span><a name="line.217"></a> |
| <span class="sourceLineNo">218</span> List<TransitionWrapper> transitionAnnotations = new ArrayList<TransitionWrapper>();<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> if (m.isAnnotationPresent(transitionAnnotation)) {<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> transitionAnnotations.add(new TransitionWrapper(transitionAnnotation, m<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> .getAnnotation(transitionAnnotation)));<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> }<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> if (m.isAnnotationPresent(transitionsAnnotation)) {<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> transitionAnnotations.addAll(Arrays.asList(new TransitionsWrapper(transitionAnnotation,<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> transitionsAnnotation, m.getAnnotation(transitionsAnnotation)).value()));<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> }<a name="line.226"></a> |
| <span class="sourceLineNo">227</span><a name="line.227"></a> |
| <span class="sourceLineNo">228</span> if (transitionAnnotations.isEmpty()) {<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> continue;<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> for (TransitionWrapper annotation : transitionAnnotations) {<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> Object[] eventIds = annotation.on();<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> if (eventIds.length == 0) {<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> throw new StateMachineCreationException("Error encountered " + "when processing method " + m<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> + ". No event ids specified.");<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> }<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> if (annotation.in().length == 0) {<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> throw new StateMachineCreationException("Error encountered " + "when processing method " + m<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> + ". No states specified.");<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> }<a name="line.241"></a> |
| <span class="sourceLineNo">242</span><a name="line.242"></a> |
| <span class="sourceLineNo">243</span> State next = null;<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> if (!annotation.next().equals(Transition.SELF)) {<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> next = states.get(annotation.next());<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> if (next == null) {<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> throw new StateMachineCreationException("Error encountered " + "when processing method " + m<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> + ". Unknown next state: " + annotation.next() + ".");<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><a name="line.251"></a> |
| <span class="sourceLineNo">252</span> for (Object event : eventIds) {<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> if (event == null) {<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> event = Event.WILDCARD_EVENT_ID;<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> }<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> if (!(event instanceof String)) {<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> event = event.toString();<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> }<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> for (String in : annotation.in()) {<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> State state = states.get(in);<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> if (state == null) {<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> throw new StateMachineCreationException("Error encountered " + "when processing method "<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> + m + ". Unknown state: " + in + ".");<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> }<a name="line.264"></a> |
| <span class="sourceLineNo">265</span><a name="line.265"></a> |
| <span class="sourceLineNo">266</span> state.addTransition(new MethodTransition(event, next, m, handler), annotation.weight());<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> }<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> }<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> }<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> }<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> }<a name="line.271"></a> |
| <span class="sourceLineNo">272</span><a name="line.272"></a> |
| <span class="sourceLineNo">273</span> static List<Field> getFields(Class<?> clazz) {<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> LinkedList<Field> fields = new LinkedList<Field>();<a name="line.274"></a> |
| <span class="sourceLineNo">275</span><a name="line.275"></a> |
| <span class="sourceLineNo">276</span> for (Field f : clazz.getDeclaredFields()) {<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> if (!f.isAnnotationPresent(org.apache.mina.statemachine.annotation.State.class)) {<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> continue;<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> }<a name="line.279"></a> |
| <span class="sourceLineNo">280</span><a name="line.280"></a> |
| <span class="sourceLineNo">281</span> if ((f.getModifiers() & Modifier.STATIC) == 0 || (f.getModifiers() & Modifier.FINAL) == 0<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> || !f.getType().equals(String.class)) {<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> throw new StateMachineCreationException("Error encountered when " + "processing field " + f<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> + ". Only static final " + "String fields can be used with the @State " + "annotation.");<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> }<a name="line.285"></a> |
| <span class="sourceLineNo">286</span><a name="line.286"></a> |
| <span class="sourceLineNo">287</span> if (!f.isAccessible()) {<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> f.setAccessible(true);<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> }<a name="line.289"></a> |
| <span class="sourceLineNo">290</span><a name="line.290"></a> |
| <span class="sourceLineNo">291</span> fields.add(f);<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> }<a name="line.292"></a> |
| <span class="sourceLineNo">293</span><a name="line.293"></a> |
| <span class="sourceLineNo">294</span> return fields;<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> }<a name="line.295"></a> |
| <span class="sourceLineNo">296</span><a name="line.296"></a> |
| <span class="sourceLineNo">297</span> static State[] createStates(List<Field> fields) {<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> LinkedHashMap<String, State> states = new LinkedHashMap<String, State>();<a name="line.298"></a> |
| <span class="sourceLineNo">299</span><a name="line.299"></a> |
| <span class="sourceLineNo">300</span> while (!fields.isEmpty()) {<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> int size = fields.size();<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> int numStates = states.size();<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> for (int i = 0; i < size; i++) {<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> Field f = fields.remove(0);<a name="line.304"></a> |
| <span class="sourceLineNo">305</span><a name="line.305"></a> |
| <span class="sourceLineNo">306</span> String value = null;<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> try {<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> value = (String) f.get(null);<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> } catch (IllegalAccessException iae) {<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> throw new StateMachineCreationException("Error encountered when " + "processing field " + f + ".",<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> iae);<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> }<a name="line.312"></a> |
| <span class="sourceLineNo">313</span><a name="line.313"></a> |
| <span class="sourceLineNo">314</span> org.apache.mina.statemachine.annotation.State stateAnnotation = f<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> .getAnnotation(org.apache.mina.statemachine.annotation.State.class);<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> if (stateAnnotation.value().equals(org.apache.mina.statemachine.annotation.State.ROOT)) {<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> states.put(value, new State(value));<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> } else if (states.containsKey(stateAnnotation.value())) {<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> states.put(value, new State(value, states.get(stateAnnotation.value())));<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> } else {<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> // Move to the back of the list of fields for later<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> // processing<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> fields.add(f);<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> }<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> }<a name="line.325"></a> |
| <span class="sourceLineNo">326</span><a name="line.326"></a> |
| <span class="sourceLineNo">327</span> /*<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> * If no new states were added to states during this iteration it<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> * means that all fields in fields specify non-existent parents.<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> */<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> if (states.size() == numStates) {<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> throw new StateMachineCreationException("Error encountered while creating "<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> + "FSM. The following fields specify non-existing " + "parent states: " + fields);<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> }<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> }<a name="line.335"></a> |
| <span class="sourceLineNo">336</span><a name="line.336"></a> |
| <span class="sourceLineNo">337</span> return states.values().toArray(new State[0]);<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> }<a name="line.338"></a> |
| <span class="sourceLineNo">339</span><a name="line.339"></a> |
| <span class="sourceLineNo">340</span> private static class TransitionWrapper {<a name="line.340"></a> |
| <span class="sourceLineNo">341</span> private final Class<? extends Annotation> transitionClazz;<a name="line.341"></a> |
| <span class="sourceLineNo">342</span><a name="line.342"></a> |
| <span class="sourceLineNo">343</span> private final Annotation annotation;<a name="line.343"></a> |
| <span class="sourceLineNo">344</span><a name="line.344"></a> |
| <span class="sourceLineNo">345</span> public TransitionWrapper(Class<? extends Annotation> transitionClazz, Annotation annotation) {<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> this.transitionClazz = transitionClazz;<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> this.annotation = annotation;<a name="line.347"></a> |
| <span class="sourceLineNo">348</span> }<a name="line.348"></a> |
| <span class="sourceLineNo">349</span><a name="line.349"></a> |
| <span class="sourceLineNo">350</span> Object[] on() {<a name="line.350"></a> |
| <span class="sourceLineNo">351</span> return getParameter("on", Object[].class);<a name="line.351"></a> |
| <span class="sourceLineNo">352</span> }<a name="line.352"></a> |
| <span class="sourceLineNo">353</span><a name="line.353"></a> |
| <span class="sourceLineNo">354</span> String[] in() {<a name="line.354"></a> |
| <span class="sourceLineNo">355</span> return getParameter("in", String[].class);<a name="line.355"></a> |
| <span class="sourceLineNo">356</span> }<a name="line.356"></a> |
| <span class="sourceLineNo">357</span><a name="line.357"></a> |
| <span class="sourceLineNo">358</span> String next() {<a name="line.358"></a> |
| <span class="sourceLineNo">359</span> return getParameter("next", String.class);<a name="line.359"></a> |
| <span class="sourceLineNo">360</span> }<a name="line.360"></a> |
| <span class="sourceLineNo">361</span><a name="line.361"></a> |
| <span class="sourceLineNo">362</span> int weight() {<a name="line.362"></a> |
| <span class="sourceLineNo">363</span> return getParameter("weight", Integer.TYPE);<a name="line.363"></a> |
| <span class="sourceLineNo">364</span> }<a name="line.364"></a> |
| <span class="sourceLineNo">365</span><a name="line.365"></a> |
| <span class="sourceLineNo">366</span> @SuppressWarnings("unchecked")<a name="line.366"></a> |
| <span class="sourceLineNo">367</span> private <T> T getParameter(String name, Class<T> returnType) {<a name="line.367"></a> |
| <span class="sourceLineNo">368</span> try {<a name="line.368"></a> |
| <span class="sourceLineNo">369</span> Method m = transitionClazz.getMethod(name);<a name="line.369"></a> |
| <span class="sourceLineNo">370</span> if (!returnType.isAssignableFrom(m.getReturnType())) {<a name="line.370"></a> |
| <span class="sourceLineNo">371</span> throw new NoSuchMethodException();<a name="line.371"></a> |
| <span class="sourceLineNo">372</span> }<a name="line.372"></a> |
| <span class="sourceLineNo">373</span> return (T) m.invoke(annotation);<a name="line.373"></a> |
| <span class="sourceLineNo">374</span> } catch (Exception e) {<a name="line.374"></a> |
| <span class="sourceLineNo">375</span> throw new StateMachineCreationException("Could not get parameter '" + name<a name="line.375"></a> |
| <span class="sourceLineNo">376</span> + "' from Transition annotation " + transitionClazz);<a name="line.376"></a> |
| <span class="sourceLineNo">377</span> }<a name="line.377"></a> |
| <span class="sourceLineNo">378</span> }<a name="line.378"></a> |
| <span class="sourceLineNo">379</span> }<a name="line.379"></a> |
| <span class="sourceLineNo">380</span><a name="line.380"></a> |
| <span class="sourceLineNo">381</span> private static class TransitionsWrapper {<a name="line.381"></a> |
| <span class="sourceLineNo">382</span> private final Class<? extends Annotation> transitionsclazz;<a name="line.382"></a> |
| <span class="sourceLineNo">383</span><a name="line.383"></a> |
| <span class="sourceLineNo">384</span> private final Class<? extends Annotation> transitionClazz;<a name="line.384"></a> |
| <span class="sourceLineNo">385</span><a name="line.385"></a> |
| <span class="sourceLineNo">386</span> private final Annotation annotation;<a name="line.386"></a> |
| <span class="sourceLineNo">387</span><a name="line.387"></a> |
| <span class="sourceLineNo">388</span> public TransitionsWrapper(Class<? extends Annotation> transitionClazz,<a name="line.388"></a> |
| <span class="sourceLineNo">389</span> Class<? extends Annotation> transitionsclazz, Annotation annotation) {<a name="line.389"></a> |
| <span class="sourceLineNo">390</span> this.transitionClazz = transitionClazz;<a name="line.390"></a> |
| <span class="sourceLineNo">391</span> this.transitionsclazz = transitionsclazz;<a name="line.391"></a> |
| <span class="sourceLineNo">392</span> this.annotation = annotation;<a name="line.392"></a> |
| <span class="sourceLineNo">393</span> }<a name="line.393"></a> |
| <span class="sourceLineNo">394</span><a name="line.394"></a> |
| <span class="sourceLineNo">395</span> TransitionWrapper[] value() {<a name="line.395"></a> |
| <span class="sourceLineNo">396</span> Annotation[] annos = getParameter("value", Annotation[].class);<a name="line.396"></a> |
| <span class="sourceLineNo">397</span> TransitionWrapper[] wrappers = new TransitionWrapper[annos.length];<a name="line.397"></a> |
| <span class="sourceLineNo">398</span> for (int i = 0; i < annos.length; i++) {<a name="line.398"></a> |
| <span class="sourceLineNo">399</span> wrappers[i] = new TransitionWrapper(transitionClazz, annos[i]);<a name="line.399"></a> |
| <span class="sourceLineNo">400</span> }<a name="line.400"></a> |
| <span class="sourceLineNo">401</span> return wrappers;<a name="line.401"></a> |
| <span class="sourceLineNo">402</span> }<a name="line.402"></a> |
| <span class="sourceLineNo">403</span><a name="line.403"></a> |
| <span class="sourceLineNo">404</span> @SuppressWarnings("unchecked")<a name="line.404"></a> |
| <span class="sourceLineNo">405</span> private <T> T getParameter(String name, Class<T> returnType) {<a name="line.405"></a> |
| <span class="sourceLineNo">406</span> try {<a name="line.406"></a> |
| <span class="sourceLineNo">407</span> Method m = transitionsclazz.getMethod(name);<a name="line.407"></a> |
| <span class="sourceLineNo">408</span> if (!returnType.isAssignableFrom(m.getReturnType())) {<a name="line.408"></a> |
| <span class="sourceLineNo">409</span> throw new NoSuchMethodException();<a name="line.409"></a> |
| <span class="sourceLineNo">410</span> }<a name="line.410"></a> |
| <span class="sourceLineNo">411</span> return (T) m.invoke(annotation);<a name="line.411"></a> |
| <span class="sourceLineNo">412</span> } catch (Exception e) {<a name="line.412"></a> |
| <span class="sourceLineNo">413</span> throw new StateMachineCreationException("Could not get parameter '" + name<a name="line.413"></a> |
| <span class="sourceLineNo">414</span> + "' from Transitions annotation " + transitionsclazz);<a name="line.414"></a> |
| <span class="sourceLineNo">415</span> }<a name="line.415"></a> |
| <span class="sourceLineNo">416</span> }<a name="line.416"></a> |
| <span class="sourceLineNo">417</span> }<a name="line.417"></a> |
| <span class="sourceLineNo">418</span>}<a name="line.418"></a> |
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| </div> |
| </body> |
| </html> |
