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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><meta http-equiv="content-type" content="text/html; charset=UTF-8" /><title>StateControl xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../apidocs/org/apache/mina/statemachine/StateControl.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="jxr_comment">/*</em><a name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em><a name="3" href="#3">3</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em><a name="4" href="#4">4</a> <em class="jxr_comment"> * distributed with this work for additional information</em><a name="5" href="#5">5</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em><a name="6" href="#6">6</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em><a name="7" href="#7">7</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em><a name="8" href="#8">8</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em><a name="9" href="#9">9</a> <em class="jxr_comment"> *</em><a name="10" href="#10">10</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em><a name="11" href="#11">11</a> <em class="jxr_comment"> *</em><a name="12" href="#12">12</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em><a name="13" href="#13">13</a> <em class="jxr_comment"> * software distributed under the License is distributed on an</em><a name="14" href="#14">14</a> <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em><a name="15" href="#15">15</a> <em class="jxr_comment"> * KIND, either express or implied. See the License for the</em><a name="16" href="#16">16</a> <em class="jxr_comment"> * specific language governing permissions and limitations</em><a name="17" href="#17">17</a> <em class="jxr_comment"> * under the License.</em><a name="18" href="#18">18</a> <em class="jxr_comment"> *</em><a name="19" href="#19">19</a> <em class="jxr_comment"> */</em><a name="20" href="#20">20</a> <strong class="jxr_keyword">package</strong> org.apache.mina.statemachine;<a name="21" href="#21">21</a> <a name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> org.apache.mina.statemachine.event.Event;<a name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> org.apache.mina.statemachine.transition.Transition;<a name="24" href="#24">24</a> <a name="25" href="#25">25</a> <em class="jxr_javadoccomment">/**</em><a name="26" href="#26">26</a> <em class="jxr_javadoccomment"> * Allows for programmatic control of a state machines execution.</em><a name="27" href="#27">27</a> <em class="jxr_javadoccomment"> * <p></em><a name="28" href="#28">28</a> <em class="jxr_javadoccomment"> * The <code>*Now()</code> family of methods move to a new {@link State}</em><a name="29" href="#29">29</a> <em class="jxr_javadoccomment"> * immediately and let the new {@link State} handle the current {@link Event}.</em><a name="30" href="#30">30</a> <em class="jxr_javadoccomment"> * The <code>*Next()</code> family on the other hand let the new {@link State}</em><a name="31" href="#31">31</a> <em class="jxr_javadoccomment"> * handle the next {@link Event} which is generated which make these method the </em><a name="32" href="#32">32</a> <em class="jxr_javadoccomment"> * programmatic equivalent of using the {@link org.apache.mina.statemachine.annotation.Transition} annotation.</em><a name="33" href="#33">33</a> <em class="jxr_javadoccomment"> * </p></em><a name="34" href="#34">34</a> <em class="jxr_javadoccomment"> * <p></em><a name="35" href="#35">35</a> <em class="jxr_javadoccomment"> * Using the <code>breakAndCall*()</code> and <code>breakAndReturn*</code> methods one</em><a name="36" href="#36">36</a> <em class="jxr_javadoccomment"> * can create sub state machines which behave very much like sub routines.</em><a name="37" href="#37">37</a> <em class="jxr_javadoccomment"> * When calling a state the current state (or the specified <code>returnTo</code></em><a name="38" href="#38">38</a> <em class="jxr_javadoccomment"> * state) will be pushed on a stack. When returning from a state the last pushed</em><a name="39" href="#39">39</a> <em class="jxr_javadoccomment"> * state will be popped from the stack and used as the new state.</em><a name="40" href="#40">40</a> <em class="jxr_javadoccomment"> * </p></em><a name="41" href="#41">41</a> <em class="jxr_javadoccomment"> *</em><a name="42" href="#42">42</a> <em class="jxr_javadoccomment"> * @author The Apache MINA Project (dev@mina.apache.org)</em><a name="43" href="#43">43</a> <em class="jxr_javadoccomment"> * @version $Rev: 592122 $, $Date: 2007-11-05 12:10:32 -0700 (Mon, 05 Nov 2007) $</em><a name="44" href="#44">44</a> <em class="jxr_javadoccomment"> */</em><a name="45" href="#45">45</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/mina/statemachine/StateControl.html">StateControl</a> {<a name="46" href="#46">46</a> <a name="47" href="#47">47</a> <em class="jxr_javadoccomment">/**</em><a name="48" href="#48">48</a> <em class="jxr_javadoccomment"> * Breaks the execution of the current {@link Transition} and tries to</em><a name="49" href="#49">49</a> <em class="jxr_javadoccomment"> * find another {@link Transition} with higher weight or a {@link Transition}</em><a name="50" href="#50">50</a> <em class="jxr_javadoccomment"> * of a parent {@link State} which can handle the current {@link Event}.</em><a name="51" href="#51">51</a> <em class="jxr_javadoccomment"> */</em><a name="52" href="#52">52</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> breakAndContinue() {<a name="53" href="#53">53</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/statemachine/BreakAndContinueException.html">BreakAndContinueException</a>();<a name="54" href="#54">54</a> }<a name="55" href="#55">55</a> <a name="56" href="#56">56</a> <em class="jxr_javadoccomment">/**</em><a name="57" href="#57">57</a> <em class="jxr_javadoccomment"> * Breaks the execution of the current {@link Transition} and lets the</em><a name="58" href="#58">58</a> <em class="jxr_javadoccomment"> * {@link State} with the specified id handle the <strong>current</strong> {@link Event}.</em><a name="59" href="#59">59</a> <em class="jxr_javadoccomment"> * </em><a name="60" href="#60">60</a> <em class="jxr_javadoccomment"> * @param state the id of the {@link State} to go to.</em><a name="61" href="#61">61</a> <em class="jxr_javadoccomment"> */</em><a name="62" href="#62">62</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> breakAndGotoNow(String state) {<a name="63" href="#63">63</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/statemachine/BreakAndGotoException.html">BreakAndGotoException</a>(state, <strong class="jxr_keyword">true</strong>);<a name="64" href="#64">64</a> }<a name="65" href="#65">65</a> <a name="66" href="#66">66</a> <em class="jxr_javadoccomment">/**</em><a name="67" href="#67">67</a> <em class="jxr_javadoccomment"> * Breaks the execution of the current {@link Transition} and lets the</em><a name="68" href="#68">68</a> <em class="jxr_javadoccomment"> * {@link State} with the specified id handle the <strong>next</strong> {@link Event}.</em><a name="69" href="#69">69</a> <em class="jxr_javadoccomment"> * Using this method is the programmatic equivalent of using the</em><a name="70" href="#70">70</a> <em class="jxr_javadoccomment"> * {@link org.apache.mina.statemachine.annotation.Transition} annotation.</em><a name="71" href="#71">71</a> <em class="jxr_javadoccomment"> * </em>⌨️ 快捷键说明
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