1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
package net.gcdc.asn1.uper;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import net.gcdc.asn1.datatypes.Choice;
import net.gcdc.asn1.uper.UperEncoder.Asn1ContainerFieldSorter;
class ChoiceCoder implements Decoder, Encoder {
@Override public <T> boolean canEncode(T obj, Annotation[] extraAnnotations) {
Class<?> type = obj.getClass();
AnnotationStore annotations = new AnnotationStore(type.getAnnotations(),
extraAnnotations);
return annotations.getAnnotation(Choice.class) != null;
}
@Override public <T> void encode(BitBuffer bitbuffer, T obj, Annotation[] extraAnnotations) throws Asn1EncodingException {
Class<?> type = obj.getClass();
AnnotationStore annotations = new AnnotationStore(type.getAnnotations(),extraAnnotations);
UperEncoder.logger.debug("CHOICE");
int nonNullIndex = 0;
Field nonNullField = null;
Object nonNullFieldValue = null;
int currentIndex = 0;
Asn1ContainerFieldSorter sorter = new Asn1ContainerFieldSorter(type);
try {
for (Field f : sorter.ordinaryFields) {
if (f.get(obj) != null) {
nonNullIndex = currentIndex;
nonNullFieldValue = f.get(obj);
nonNullField = f;
break;
}
currentIndex++;
}
if (nonNullFieldValue != null) {
if (UperEncoder.hasExtensionMarker(annotations)) {
boolean extensionBit = false;
UperEncoder.logger.debug(String.format("with extension marker, set to %s", extensionBit));
bitbuffer.put(extensionBit);
}
if (sorter.ordinaryFields.size() > 1) { // Encode index only if more than one.
UperEncoder.logger.debug(String.format("with chosen element indexed %d", nonNullIndex));
UperEncoder.encodeConstrainedInt(bitbuffer, nonNullIndex, 0,
sorter.ordinaryFields.size() - 1);
}
UperEncoder.encode2(bitbuffer, nonNullFieldValue, nonNullField.getAnnotations());
return;
} else if (UperEncoder.hasExtensionMarker(annotations)) {
//CG encoding of extension fields
currentIndex = 0;
for (Field f : sorter.extensionFields) {
if (f.get(obj) != null) {
nonNullIndex = currentIndex;
nonNullFieldValue = f.get(obj);
nonNullField = f;
break;
}
currentIndex++;
}
if (nonNullField == null) {
UperEncoder.logger.debug(String.format("without choice of extension"));
return;
}
boolean extensionBit = true;
UperEncoder.logger.debug(String.format("with extension marker, set to <%s>", extensionBit));
bitbuffer.put(extensionBit);
//CG encode extension values
//Always encode index of the element
UperEncoder.logger.debug(String.format("with chosen extension element indexed %d", nonNullIndex));
//encode small integer even with value 0
UperEncoder.encodeSmallInt(bitbuffer, nonNullIndex);
//Encode as open field
UperEncoder.encodeAsOpenType(bitbuffer, nonNullFieldValue, nonNullField.getAnnotations());
return;
} else {
throw new IllegalArgumentException("Not Extension and All ordinary fields of Choice are null");
}
} catch (IllegalArgumentException | IllegalAccessException e) {
throw new IllegalArgumentException("can't encode " + obj, e);
} catch (Asn1EncodingException e) {
throw new Asn1EncodingException("." + type.getName(), e);
}
}
@Override public <T> boolean canDecode(Class<T> classOfT, Annotation[] extraAnnotations) {
AnnotationStore annotations = new AnnotationStore(classOfT.getAnnotations(),
extraAnnotations);
return annotations.getAnnotation(Choice.class) != null;
}
@Override public <T> T decode(BitBuffer bitbuffer,
Class<T> classOfT, Field field1,
Annotation[] extraAnnotations) {
AnnotationStore annotations = new AnnotationStore(classOfT.getAnnotations(),extraAnnotations);
UperEncoder.logger.debug(String.format("CHOICE: %s", classOfT.getName()));
T result = UperEncoder.instantiate(classOfT);
Asn1ContainerFieldSorter sorter = new Asn1ContainerFieldSorter(classOfT);
// Reset all fields, since default constructor initializes one.
for (Field f : sorter.allFields) {
try {
f.set(result, null);
} catch (IllegalArgumentException | IllegalAccessException e) {
throw new IllegalArgumentException("can't decode " + classOfT, e);
}
}
if (UperEncoder.hasExtensionMarker(annotations)) {
UperEncoder.logger.debug("with extension marker");
boolean extensionPresent = bitbuffer.get();
if (extensionPresent) {
//CG extension support added
int i = (int) UperEncoder.decodeSmallInt(bitbuffer);
UperEncoder.logger.debug(String.format("extension with index %d is present",i));
Field field = sorter.extensionFields.size() > i ? sorter.extensionFields.get(i) : null;
Class<?> classOfElement = field != null ? field.getType() : null;
if (field != null) {
try {
Object decodedValue = UperEncoder.decodeAsOpenType(bitbuffer, classOfElement,field, field.getAnnotations());
if (field != null) {
field.set(result, decodedValue);
}
return result;
} catch (IllegalArgumentException | IllegalAccessException e) {
throw new IllegalArgumentException("can't decode " + classOfT, e);
}
} else {
//CG skip the unknown extension element
UperEncoder.decodeSkipUnknownElement(bitbuffer, classOfT.getSimpleName());
return null;
}
//throw new UnsupportedOperationException("choice extension is not implemented yet");
} else {
UperEncoder.logger.debug(String.format("no extension present"));
//no extension is present
//We already consumed the bit, keep processing as if there were no extension.
}
}
int index = (int) UperEncoder.decodeConstrainedInt(bitbuffer,
UperEncoder.newRange(0, sorter.ordinaryFields.size() - 1, false));
Field f = sorter.ordinaryFields.get(index);
UperEncoder.logger.debug(String.format("CHOICE: selected %s", f.getName()));
Object fieldValue = UperEncoder.decodeAny(bitbuffer, f.getType(),f, f.getAnnotations());
try {
f.set(result, fieldValue);
} catch (IllegalArgumentException | IllegalAccessException e) {
throw new IllegalArgumentException("can't decode " + classOfT, e);
}
return result;
}
@Override
public <T> T getDefault(Class<T> classOfT, Annotation[] extraAnnotations) {
throw new IllegalArgumentException("Default Choice not yet implemented");
}
}
|
