|
1 package org.python.core;
3 import java.lang.reflect.Modifier  ;
4
5
8
9 public class PyJavaInstance
10 extends PyInstance
11 implements java.io.Externalizable
12 {
13 public PyJavaInstance() {
14 }
15
16 public PyJavaInstance(PyJavaClass iclass) {
17 super(iclass, null);
18 }
19
20 public PyJavaInstance(Object proxy) {
21 super(PyJavaClass.lookup(proxy.getClass()), null);
22 javaProxy = proxy;
23 }
24
25
31 public void readExternal(java.io.ObjectInput in)
32 throws java.io.IOException , ClassNotFoundException
33 {
34 Object o = in.readObject();
35 javaProxy = o;
36 instclass = PyJavaClass.lookup(o.getClass());
37 }
38
39
44 public void writeExternal(java.io.ObjectOutput out)
45 throws java.io.IOException
46 {
47 out.writeObject(javaProxy);
49 }
50
51
52 public void __init__(PyObject[] args, String [] keywords) {
53
55 Class pc = instclass.proxyClass;
56 if (pc != null) {
57 int mods = pc.getModifiers();
58 if (Modifier.isInterface(mods)) {
59 throw Py.TypeError("can't instantiate interface ("+
60 instclass.__name__+")");
61 }
62 else if (Modifier.isAbstract(mods)) {
63 throw Py.TypeError("can't instantiate abstract class ("+
64 instclass.__name__+")");
65 }
66 }
67
68 PyReflectedConstructor init = ((PyJavaClass)instclass).__init__;
69 if (init == null) {
70 throw Py.TypeError("no public constructors for "+
71 instclass.__name__);
72 }
73 init.__call__(this, args, keywords);
74 }
75
76 protected void noField(String name, PyObject value) {
77 throw Py.TypeError("can't set arbitrary attribute in java instance: "+
78 name);
79 }
80
81 protected void unassignableField(String name, PyObject value) {
82 throw Py.TypeError("can't assign to this attribute in java " +
83 "instance: " + name);
84 }
85
86 public int hashCode() {
87 if (javaProxy != null) {
88 return javaProxy.hashCode();
89 } else {
90 return super.hashCode();
91 }
92 }
93
94 public PyObject _is(PyObject o) {
95 if (o instanceof PyJavaInstance) {
96 return javaProxy == ((PyJavaInstance)o).javaProxy
97 ? Py.One : Py.Zero;
98 }
99 return Py.Zero;
100 }
101
102 public PyObject _isnot(PyObject o) {
103 return _is(o).__not__();
104 }
105
106 public int __cmp__(PyObject o) {
107 if (!(o instanceof PyJavaInstance))
108 return -2;
109 PyJavaInstance i = (PyJavaInstance)o;
110 if (javaProxy.equals(i.javaProxy))
111 return 0;
112 return -2;
113 }
114
115 public PyString __str__() {
116 return new PyString(javaProxy.toString());
117 }
118
119 public PyString __repr__() {
120 return __str__();
121 }
122
123 public void __delattr__(String attr) {
124 throw Py.TypeError("can't delete attr from java instance: "+attr);
125 }
126 }
127 |
Popular Tags |
Java API By Example, From Geeks To Geeks.