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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.tobago.event;
21  
22  import org.apache.myfaces.tobago.compat.FacesUtilsEL;
23  
24  import javax.el.MethodExpression;
25  import javax.faces.component.StateHolder;
26  import javax.faces.context.FacesContext;
27  import javax.faces.event.AbortProcessingException;
28  
29  public class MethodExpressionTabChangeListener implements TabChangeListener, StateHolder {
30  
31    private MethodExpression methodExpression;
32  
33    private boolean isTransient = false;
34  
35    public MethodExpressionTabChangeListener() {
36    }
37  
38    public MethodExpressionTabChangeListener(final MethodExpression methodExpression) {
39      this.methodExpression = methodExpression;
40    }
41  
42    @Override
43    public void processTabChange(final TabChangeEvent actionEvent) throws AbortProcessingException {
44       FacesUtilsEL.invokeMethodExpression(FacesContext.getCurrentInstance(), methodExpression, actionEvent);
45    }
46  
47    @Override
48    public void restoreState(final FacesContext context, final Object state) {
49      methodExpression = (MethodExpression) state;
50    }
51  
52    @Override
53    public Object saveState(final FacesContext context) {
54      return methodExpression;
55    }
56  
57    @Override
58    public void setTransient(final boolean newTransientValue) {
59      isTransient = newTransientValue;
60    }
61  
62    @Override
63    public boolean isTransient() {
64      return isTransient;
65    }
66  
67  }