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package org.apache.commons.scxml.test; |
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import java.io.BufferedReader; |
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import java.io.File; |
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import java.io.IOException; |
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import java.io.InputStreamReader; |
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import java.net.URL; |
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import java.util.StringTokenizer; |
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import org.apache.commons.scxml.Context; |
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import org.apache.commons.scxml.Evaluator; |
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import org.apache.commons.scxml.EventDispatcher; |
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import org.apache.commons.scxml.SCXMLExecutor; |
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import org.apache.commons.scxml.SCXMLHelper; |
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import org.apache.commons.scxml.TriggerEvent; |
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import org.apache.commons.scxml.env.SimpleScheduler; |
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import org.apache.commons.scxml.env.Tracer; |
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import org.apache.commons.scxml.invoke.SimpleSCXMLInvoker; |
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import org.apache.commons.scxml.io.SCXMLDigester; |
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import org.apache.commons.scxml.io.SCXMLSerializer; |
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import org.apache.commons.scxml.model.ModelException; |
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import org.apache.commons.scxml.model.SCXML; |
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import org.xml.sax.SAXException; |
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public final class StandaloneUtils { |
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public static void execute(final String uri, final Evaluator evaluator) { |
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try { |
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String documentURI = getCanonicalURI(uri); |
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Context rootCtx = evaluator.newContext(null); |
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Tracer trc = new Tracer(); |
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SCXML doc = SCXMLDigester.digest(new URL(documentURI), trc); |
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if (doc == null) { |
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System.err.println("The SCXML document " + uri |
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+ " can not be parsed!"); |
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System.exit(-1); |
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} |
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System.out.println(SCXMLSerializer.serialize(doc)); |
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SCXMLExecutor exec = new SCXMLExecutor(evaluator, null, trc); |
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EventDispatcher ed = new SimpleScheduler(exec); |
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exec.setEventdispatcher(ed); |
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exec.setStateMachine(doc); |
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exec.addListener(doc, trc); |
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exec.registerInvokerClass("scxml", SimpleSCXMLInvoker.class); |
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exec.setRootContext(rootCtx); |
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exec.go(); |
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BufferedReader br = new BufferedReader(new |
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InputStreamReader(System.in)); |
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String event = null; |
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while ((event = br.readLine()) != null) { |
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event = event.trim(); |
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if (event.equalsIgnoreCase("help") || event.equals("?")) { |
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System.out.println("Enter a space-separated list of " |
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+ "events"); |
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System.out.println("To populate a variable in the " |
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+ "current context, type \"name=value\""); |
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System.out.println("To quit, enter \"quit\""); |
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System.out.println("To reset state machine, enter " |
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+ "\"reset\""); |
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} else if (event.equalsIgnoreCase("quit")) { |
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break; |
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} else if (event.equalsIgnoreCase("reset")) { |
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exec.reset(); |
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} else if (event.indexOf('=') != -1) { |
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int marker = event.indexOf('='); |
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String name = event.substring(0, marker); |
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String value = event.substring(marker + 1); |
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rootCtx.setLocal(name, value); |
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System.out.println("Set variable " + name + " to " |
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+ value); |
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} else if (SCXMLHelper.isStringEmpty(event) |
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|| event.equalsIgnoreCase("null")) { |
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TriggerEvent[] evts = {new TriggerEvent(null, |
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TriggerEvent.SIGNAL_EVENT, null)}; |
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exec.triggerEvents(evts); |
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if (exec.getCurrentStatus().isFinal()) { |
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System.out.println("A final configuration reached."); |
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} |
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} else { |
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StringTokenizer st = new StringTokenizer(event); |
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int tkns = st.countTokens(); |
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TriggerEvent[] evts = new TriggerEvent[tkns]; |
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for (int i = 0; i < tkns; i++) { |
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evts[i] = new TriggerEvent(st.nextToken(), |
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TriggerEvent.SIGNAL_EVENT, null); |
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} |
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exec.triggerEvents(evts); |
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if (exec.getCurrentStatus().isFinal()) { |
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System.out.println("A final configuration reached."); |
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} |
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} |
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} |
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} catch (IOException e) { |
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e.printStackTrace(); |
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} catch (ModelException e) { |
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e.printStackTrace(); |
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} catch (SAXException e) { |
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e.printStackTrace(); |
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} |
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} |
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private static String getCanonicalURI(final String uri) |
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throws IOException { |
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if (uri.toLowerCase().startsWith("http://") |
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|| uri.toLowerCase().startsWith("file://")) { |
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return uri; |
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} |
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File in = new File(uri); |
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return "file:///" + in.getCanonicalPath(); |
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} |
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private StandaloneUtils() { |
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super(); |
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} |
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} |
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