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19 package org.apache.myfaces.view.facelets.tag.jsf;
20
21 import javax.el.MethodExpression;
22 import javax.faces.component.PartialStateHolder;
23 import javax.faces.context.FacesContext;
24 import javax.faces.event.MethodExpressionActionListener;
25
26 public class PartialMethodExpressionActionListener extends
27 MethodExpressionActionListener implements PartialStateHolder
28 {
29 private boolean _initialStateMarked;
30
31 public PartialMethodExpressionActionListener()
32 {
33 super();
34 }
35
36 public PartialMethodExpressionActionListener(
37 MethodExpression methodExpression1,
38 MethodExpression methodExpression2)
39 {
40 super(methodExpression1, methodExpression2);
41 }
42
43 public PartialMethodExpressionActionListener(
44 MethodExpression methodExpression)
45 {
46 super(methodExpression);
47 }
48
49 public void clearInitialState()
50 {
51 _initialStateMarked = false;
52 }
53
54 public boolean initialStateMarked()
55 {
56 return _initialStateMarked;
57 }
58
59 public void markInitialState()
60 {
61 _initialStateMarked = true;
62 }
63
64 public void restoreState(FacesContext context, Object state)
65 {
66 if (state == null)
67 {
68 return;
69 }
70 super.restoreState(context, state);
71 }
72
73 public Object saveState(FacesContext context)
74 {
75 if (initialStateMarked())
76 {
77 return null;
78 }
79 return super.saveState(context);
80 }
81 }