View Javadoc

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.ELContext;
25  import javax.el.MethodExpression;
26  import javax.faces.component.StateHolder;
27  import javax.faces.context.FacesContext;
28  
29  
30  public class MethodExpressionTreeExpansionListener implements TreeExpansionListener, StateHolder {
31  
32    private MethodExpression methodExpression;
33  
34    private boolean isTransient = false;
35  
36    public MethodExpressionTreeExpansionListener() {
37    }
38  
39    public MethodExpressionTreeExpansionListener(final MethodExpression methodExpression) {
40      this.methodExpression = methodExpression;
41    }
42  
43    public void treeExpanded(final TreeExpansionEvent event) {
44      FacesUtilsEL.invokeMethodExpression(FacesContext.getCurrentInstance(), methodExpression, event);
45    }
46  
47    private ELContext elContext() {
48      return FacesContext.getCurrentInstance().getELContext();
49    }
50  
51    public void restoreState(final FacesContext context, final Object state) {
52      methodExpression = (MethodExpression) state;
53    }
54  
55    public Object saveState(final FacesContext context) {
56      return methodExpression;
57    }
58  
59    public void setTransient(final boolean newTransientValue) {
60      isTransient = newTransientValue;
61    }
62  
63    public boolean isTransient() {
64      return isTransient;
65    }
66  }