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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.scxml2;
18  
19  import java.io.Serializable;
20  
21  /**
22   * Implementation of the SCXML specification required In() builtin predicate.
23   */
24  public class Builtin implements Serializable {
25  
26      /**
27       * Serial version UID.
28       */
29      private static final long serialVersionUID = 1L;
30  
31      /**
32       * Implements the In() predicate for SCXML documents. The method
33       * name chosen is different since "in" is a reserved token
34       * in some expression languages.
35       *
36       * Simple ID based comparator, assumes IDs are unique.
37       *
38       * @param ctx variable context
39       * @param state The State ID to compare with
40       * @return Whether this State is current active
41       */
42      @SuppressWarnings("unchecked")
43      public static boolean isMember(final Context ctx, final String state) {
44          return ((Status)ctx.getSystemContext().getPlatformVariables().get(SCXMLSystemContext.STATUS_KEY)).isInState(state);
45      }
46  }
47