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1 package com.tirsen.nanning.samples.prevayler;
2
3 import java.io.Serializable  ;
4 import java.security.PrivilegedExceptionAction ;
5
6 import javax.security.auth.Subject ;
7
8 import com.tirsen.nanning.Invocation;
9
10 public class MarshallingCall extends AuthenticatedCall {
11 static final long serialVersionUID = -8607314000649422353L;
12
13 private transient Marshaller marshaller;
14
15 public MarshallingCall(Invocation invocation, Marshaller marshaller) throws Exception {
16 setMarshaller(marshaller);
17 setInvocation(invocation);
18 }
19
20 public void setMarshaller(Marshaller marshaller) {
21 this.marshaller = marshaller;
22 }
23
24 public Marshaller getMarshaller() {
25 if (marshaller == null) {
26 marshaller = createMarshaller();
27 }
28 return marshaller;
29 }
30
31 protected Marshaller createMarshaller() {
32 return null;
33 }
34
35 protected void setInvocation(Invocation invocation) throws Exception {
36 super.setInvocation(invocation);
37 target = marshal(target);
38 args = marshalArguments(invocation.getArgs());
39 }
40
41 protected Object [] marshalArguments(Object [] args) throws Exception {
42 if (args == null) {
43 return null;
44 }
45
46 Object [] marshalled = new Object [args.length];
47 for (int i = 0; i < args.length; i++) {
48 Object arg = args[i];
49 marshalled[i] = marshal(arg);
50 }
51 return marshalled;
52 }
53
54 protected Object marshal(Object o) {
55 return getMarshaller().marshal(o);
56 }
57
58 private Object [] unmarshalArguments(Object [] args) {
59 if (args == null) {
60 return null;
61 }
62
63 Object [] unmarshalled = new Object [args.length];
64 for (int i = 0; i < args.length; i++) {
65 Object o = args[i];
66 unmarshalled[i] = unmarshal(o);
67 }
68 return unmarshalled;
69 }
70
71 protected Object unmarshal(Object o) {
72 return getMarshaller().unmarshal(o);
73 }
74
75 public Object [] getArgs() {
76 return unmarshalArguments(args);
77 }
78
79 public Object getTarget() {
80 assert target != null;
81 return unmarshal(target);
82 }
83
84 public void setTarget(Object target) {
85 this.target = marshaller.marshal(target);
86 }
87
88 public Object invoke() throws Exception {
89 Subject subject = getSubject();
90
91 Object result;
92
93 if (subject != null) {
94 try {
95 result = Subject.doAs(subject, new PrivilegedExceptionAction () {
96 public Object run() throws Exception {
97 return MarshallingCall.super.invoke();
98 }
99 });
100 } catch (java.security.PrivilegedActionException e) {
101 throw e.getException();
102 }
103 } else {
104 result = super.invoke();
105 }
106
107 return result;
108 }
109 }
110 |
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