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16 package org.apache.myfaces.custom.updateactionlistener;
17
18 import javax.faces.FacesException;
19 import javax.faces.component.StateHolder;
20 import javax.faces.component.UIComponentBase;
21 import javax.faces.component.ValueHolder;
22 import javax.faces.context.FacesContext;
23 import javax.faces.convert.Converter;
24 import javax.faces.el.ValueBinding;
25 import javax.faces.event.AbortProcessingException;
26 import javax.faces.event.ActionEvent;
27 import javax.faces.event.ActionListener;
28
29
46 public class UpdateActionListener
47 implements ActionListener, ValueHolder, StateHolder
48 {
49
51 private ValueBinding _propertyBinding;
52 private Object  _value;
53 private ValueBinding _valueBinding;
54 private Converter _converter;
55
56 public void setPropertyBinding(ValueBinding propertyBinding)
57 {
58 _propertyBinding = propertyBinding;
59 }
60
61 public ValueBinding getPropertyBinding()
62 {
63 return _propertyBinding;
64 }
65
66 public void setValue(Object value)
67 {
68 _value = value;
69 }
70
71 public Object getValue()
72 {
73 if (_value != null) return _value;
74 ValueBinding vb = getValueBinding();
75 if (vb != null)
76 {
77 FacesContext context = FacesContext.getCurrentInstance();
78 return vb.getValue(context);
79 }
80 return null;
81 }
82
83 public Object getLocalValue()
84 {
85 return _value;
86 }
87
88 public ValueBinding getValueBinding()
89 {
90 return _valueBinding;
91 }
92
93 public void setValueBinding(ValueBinding valueBinding)
94 {
95 _valueBinding = valueBinding;
96 }
97
98 public Converter getConverter()
99 {
100 return _converter;
101 }
102
103 public void setConverter(Converter converter)
104 {
105 _converter = converter;
106 }
107
108 public void processAction(ActionEvent actionEvent) throws AbortProcessingException
109 {
110 FacesContext context = FacesContext.getCurrentInstance();
111 ValueBinding updateBinding = getPropertyBinding();
112 Object v = getValue();
113 if (v != null &&
114 v instanceof String )
115 {
116 Class type = updateBinding.getType(context);
117 if (!type.equals(String .class) && ! type.equals(Object .class))
118 {
119 Converter converter = getConverter();
120 if (converter == null)
121 {
122 try
123 {
124 converter = context.getApplication().createConverter(type);
125 }
126 catch (Exception e)
127 {
128 throw new FacesException("No Converter registered with UpdateActionListener and no appropriate standard converter found. Needed to convert String to " + type.getName(), e);
129 }
130 }
131 v = converter.getAsObject(context, context.getViewRoot(), (String )v);
132 }
133 }
134 updateBinding.setValue(context, v);
135 }
136
137
138
139
141 public Object saveState(FacesContext context)
142 {
143 Object values[] = new Object [4];
144 values[0] = UIComponentBase.saveAttachedState(context, _propertyBinding);
145 values[1] = _value;
146 values[2] = UIComponentBase.saveAttachedState(context, _valueBinding);
147 values[3] = UIComponentBase.saveAttachedState(context, _converter);
148 return ((Object ) (values));
149 }
150
151 public void restoreState(FacesContext context, Object state)
152 {
153 Object values[] = (Object [])state;
154 _propertyBinding = (ValueBinding)UIComponentBase.restoreAttachedState(context, values[0]);
155 _value = values[1];
156 _valueBinding = (ValueBinding)UIComponentBase.restoreAttachedState(context, values[2]);;
157 _converter = (Converter)UIComponentBase.restoreAttachedState(context, values[3]);;
158 }
159
160 public boolean isTransient()
161 {
162 return false;
163 }
164
165 public void setTransient(boolean newTransientValue)
166 {
167 if (newTransientValue == true) throw new IllegalArgumentException ();
168 }
169
170 }
171 |
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