01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: * Free SoftwareFoundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Alex Rojkov
27: */
28:
29: package javax.faces.event;
30:
31: import javax.faces.component.StateHolder;
32: import javax.faces.context.FacesContext;
33: import javax.el.MethodExpression;
34: import javax.el.ELContext;
35: import javax.el.ELException;
36:
37: public class MethodExpressionValueChangeListener implements
38: StateHolder, ValueChangeListener {
39: private MethodExpression _expression;
40: private boolean _transient;
41:
42: public MethodExpressionValueChangeListener() {
43: }
44:
45: public MethodExpressionValueChangeListener(
46: MethodExpression expression) {
47: _expression = expression;
48: }
49:
50: public Object saveState(FacesContext context) {
51: return _expression;
52: }
53:
54: public void restoreState(FacesContext context, Object state) {
55: _expression = (MethodExpression) state;
56: }
57:
58: public boolean isTransient() {
59: return _transient;
60: }
61:
62: public void setTransient(boolean isTransient) {
63: _transient = isTransient;
64: }
65:
66: public void processValueChange(ValueChangeEvent event)
67: throws AbortProcessingException {
68: ELContext elContext = FacesContext.getCurrentInstance()
69: .getELContext();
70:
71: try {
72: _expression.invoke(elContext, new Object[] { event });
73: } catch (ELException e) {
74: Throwable t = e.getCause();
75: if (t instanceof AbortProcessingException) {
76: throw (AbortProcessingException) t;
77: }
78: throw e;
79: }
80: }
81: }
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