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1 package org.python.core;
3
4 import java.lang.reflect.*;
5 import java.util.Hashtable  ;
6 import java.io.*;
7
8 public class PyBeanEventProperty extends PyReflectedField
9 {
10 public Method addMethod;
11 public String eventName;
12 public Class eventClass;
13 public String __name__;
14
15 public PyBeanEventProperty(String eventName, Class eventClass,
16 Method addMethod, Method eventMethod)
17 {
18 __name__ = eventMethod.getName().intern();
19 this.addMethod = addMethod;
20 this.eventName = eventName;
21 this.eventClass = eventClass;
22 }
23
24 public PyObject _doget(PyObject self) {
25 if (self == null)
26 return this;
27
28 initAdapter();
29
30 Object jself = Py.tojava(self, addMethod.getDeclaringClass());
31
32 Object field;
33 try {
34 field = adapterField.get(getAdapter(jself));
35 } catch (Exception exc) {
36 throw Py.JavaError(exc);
37 }
38
39 PyCompoundCallable func;
40 if (field == null) {
41 func = new PyCompoundCallable();
42 setFunction(jself, func);
43 return func;
44 }
45 if (field instanceof PyCompoundCallable)
46 return (PyCompoundCallable)field;
47
48 func = new PyCompoundCallable();
49 setFunction(jself, func);
50 func.append((PyObject)field);
51 return func;
52 }
53
54 private synchronized static Class getAdapterClass(Class c) {
55 InternalTables tbl=PyJavaClass.getInternalTables();
57 Object o = tbl.getAdapterClass(c);
58 if (o != null)
59 return (Class )o;
60 Class pc = Py.findClass("org.python.proxies."+c.getName()+"$Adapter");
61 if (pc == null) {
62 pc = MakeProxies.makeAdapter(c);
66 }
67 tbl.putAdapterClass(c, pc);
68 return pc;
69 }
70
71 private synchronized Object getAdapter(Object self) {
72 InternalTables tbl=PyJavaClass.getInternalTables();
73 String eventClassName = eventClass.getName();
74
75 Object adapter = tbl.getAdapter(self, eventClassName);
76 if (adapter != null)
77 return adapter;
78
79 try {
80 adapter = adapterClass.newInstance();
81 addMethod.invoke(self, new Object [] {adapter});
82 } catch (Exception e) {
83 throw Py.JavaError(e);
84 }
85 tbl.putAdapter(self, eventClassName, adapter);
86 return adapter;
87 }
88
89 private Field adapterField;
90 private Class adapterClass;
91
92 private void initAdapter() {
93 if (adapterClass == null) {
94 adapterClass = getAdapterClass(eventClass);
95 }
96 if (adapterField == null) {
97 try {
98 adapterField = adapterClass.getField(__name__);
99 } catch (NoSuchFieldException exc) {
100 throw Py.AttributeError("Internal bean event error: "+
101 __name__);
102 }
103 }
104 }
105
106 private void setFunction(Object self, PyObject callable) {
107 initAdapter();
108 try {
109 adapterField.set(getAdapter(self), callable);
110 } catch (Exception exc) {
111 throw Py.JavaError(exc);
112 }
113 }
114
115 public boolean _doset(PyObject self, PyObject value) {
116 Object jself = Py.tojava(self, addMethod.getDeclaringClass());
117 if (!(value instanceof PyCompoundCallable)) {
118 PyCompoundCallable func = new PyCompoundCallable();
119 setFunction(jself, func);
120 func.append(value);
121 } else {
122 setFunction(jself, value);
123 }
124 return true;
125 }
126
127 public String toString() {
128 return "<beanEventProperty "+__name__+" for event "+
129 eventClass.toString()+" "+Py.idstr(this)+">";
130 }
131 }
132 |
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