src/test/java/org/apache/commons/scxml2/env/javascript/example-01.xml

<?xml version="1.0"?>
<!--
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
-->
<!-- SCXML Javascript environment: example script -->
<scxml xmlns        = 'http://www.w3.org/2005/07/scxml'
       xmlns:scxml  = 'https://commons.apache.org/scxml'
       xmlns:my     = 'http://my.custom-actions.domain'
       initial      = 'start'
       datamodel    = "ecmascript"
       version      = '1.0'>

  <!-- DATA MODEL -->

  <datamodel>
    <data id='jungle'>
      {
        "animals" :
        {
          "lion" :
          {
            "name" : "Simba",
            "age" : 12
          },
          "tiger" :
          {
            "name" : "Sher Khan",
            "age" : 13
          }
        }
      }
    </data>
  </datamodel>

  <!-- INITIALISATION -->

  <state id='start'>
    <onentry>
      <log expr='"Starting Javascript sample script: " + new Date()' />
    </onentry>
    <transition target='javascript' />
  </state>

  <!-- JAVASCRIPT -->

  <state id='javascript'>
    <onentry>
      <scxml:var name='factorial' expr='new Function("N","if (N == 1)
                                                          return N;
                                                          else
                                                          return N * factorial(N-1)")' />
    </onentry>
    <initial>
      <transition target='javascript.simple' />
    </initial>

    <!-- SIMPLE JAVASCRIPT EXPRESSIONS -->

    <state id='javascript.simple'>
      <onentry>
        <log expr='"Arithmetic: " + (1 + 2 + 3 + 4 + 5)'    />
        <log expr='"Boolean   : " + ((1 + 2) &lt; (3 + 4))' />
        <log expr='"String    : " + "QWERTY"'               />
      </onentry>
      <transition target='javascript.var' />
    </state>

    <!-- SCXML VAR -->

    <state id='javascript.var'>
      <onentry>
        <scxml:var name='snake_name' expr='"Kaa"' />
        <scxml:var name='snake_age'  expr='"99"'  />
        <log expr='"Snake: " + snake_name + "," + (snake_age + 1)'  />
      </onentry>
      <transition target='javascript.datamodel' />
    </state>

    <!-- SCXML DATA MODEL -->

    <state id='javascript.datamodel'>
      <onentry>
        <log expr='"Lion : " + jungle.animals.lion.name  + "," + jungle.animals.lion.age'  />
        <log expr='"Tiger: " + jungle.animals.tiger.name  + "," + jungle.animals.tiger.age'  />
        <assign location='jungle.animals.lion.age' expr='jungle.animals.tiger.age'/>
        <log expr='"Lion : " + jungle.animals.lion.name  + "," + jungle.animals.lion.age'  />
        <log expr='"Tiger: " + jungle.animals.tiger.name  + "," + jungle.animals.tiger.age'  />
      </onentry>
      <transition target='javascript.functions.inline' />
    </state>

    <!-- JAVASCRIPT FUNCTIONS -->

    <state id='javascript.functions.inline'>
      <onentry>
        <log expr='function fibonacci()
                        { return 1 + 1 + 2 + 3 + 5;
                        };

               "FIBONACCI(5) : " + fibonacci()' />
      </onentry>
      <transition target='javascript.functions.var' />
    </state>

    <state id='javascript.functions.var'>
      <onentry>
        <scxml:var name='fibonacci' expr='new Function("return 1 + 1 + 2 + 3 + 5 + 6")' />
        <log expr='"FIBONACCI(6) : " + fibonacci()' />
      </onentry>
      <transition target='javascript.functions.global' />
    </state>

    <state id='javascript.functions.global'>
      <onentry>
        <log expr='"factorial: " + factorial(5)' />
      </onentry>
      <transition target='javascript.functions.print' />
    </state>

    <state id='javascript.functions.print'>
      <onentry>
        <log expr='function debug(msg)
                        { print("** " + msg + " **");
                          return "ok"
                        }

               debug("This is the Javascript print() function")' />
      </onentry>
      <transition target='javascript.eventdatamap.example' />
    </state>

  </state>

  <!-- _eventdatamap USAGE -->

  <state id='javascript.eventdatamap.example'>
    <onentry>
      <my:eventdatamaptest />
    </onentry>
    <transition target='in.test' event='ok' >
    </transition>
  </state>

  <!-- In() FUNCTION USAGE -->

  <state id='in.test'>
    <transition cond="In('foo.bar')" /> <!-- stay -->
    <transition target='end' cond="!In('foo.bar')" >
      <log label="In(foo.bar)" expr='In("foo.bar")' />
    </transition>
  </state>

  <!-- DONE -->

  <final id='end'>
    <onentry>
      <log expr='"Ending Javascript sample script: " + new Date()' />
    </onentry>
  </final>

</scxml>