2009/05/20 - Apache Shale has been retired.

For more information, please explore the Attic.


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  
18  package org.apache.shale.dialog.scxml;
19  
20  import javax.faces.context.FacesContext;
21  import javax.faces.el.VariableResolver;
22  
23  import org.apache.commons.scxml.env.SimpleContext;
24  
25  
26  /***
27   * <p>EL context used by the Commons SCXML executor driving the Shale
28   * dialog, backed by application {@link VariableResolver}.</p>
29   *
30   * @since 1.0.5
31   *
32   * $Id: ShaleDialogELContext.java 501972 2007-01-31 20:13:46Z rahul $
33   */
34  
35  public class ShaleDialogELContext extends SimpleContext {
36  
37      /*** Serial version UID. */
38      private static final long serialVersionUID = 1L;
39  
40     /***
41       * Constructor.
42       */
43      public ShaleDialogELContext() {
44          super();
45      }
46  
47  
48      /***
49       * Get the value of this variable from the application
50       * {@link VariableResolver} in use; delegating to parent.
51       *
52       * @param name The variable name
53       * @return Object The variable value
54       * @see org.apache.commons.scxml.Context#get(java.lang.String)
55       */
56      public Object get(final String name) {
57          FacesContext context = FacesContext.getCurrentInstance();
58          VariableResolver vr = context.getApplication().getVariableResolver();
59          Object value = vr.resolveVariable(context, name);
60          if (value != null) {
61              return value;
62          }
63          return super.get(name);
64      }
65  
66  
67  }