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
|
package org.gnunet.construct.parsers;
import org.gnunet.construct.Message;
import org.gnunet.construct.ReflectUtil;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.nio.ByteBuffer;
public class VariableSizeArrayParser implements Parser {
private final Field targetField;
private final Parser elemParser;
private ReflectUtil.NumField sizeField;
public VariableSizeArrayParser(final Parser elemParser, Field sizeField, Field arrayField) {
targetField = arrayField;
this.elemParser = elemParser;
this.sizeField = new ReflectUtil.NumField(sizeField);
}
@Override
public int getSize(final Message src) {
int size = 0;
final Object arr = ReflectUtil.justGet(src, targetField);
if (arr == null) {
throw new RuntimeException("array not initialized");
}
for (int i = 0; i < Array.getLength(arr); ++i) {
size += elemParser.getSize((Message) Array.get(arr, i));
}
return size;
}
@Override
public int parse(final ByteBuffer srcBuf, int frameOffset, Message frameObj, final Message dstObj) {
final int elemNumber = (int) sizeField.get(dstObj);
@SuppressWarnings("unchecked")
final Class<Message> arrayElementType = (Class<Message>) targetField.getType().getComponentType();
int size = 0;
final Object arr = Array.newInstance(arrayElementType, elemNumber);
ReflectUtil.justSet(dstObj, targetField, arr);
for (int i = 0; i < elemNumber; ++i) {
Message elemObj;
elemObj = (Message) ReflectUtil.<Message>justInstantiate(arrayElementType);
Array.set(arr, i, elemObj);
size += elemParser.parse(srcBuf, frameOffset - size, null, elemObj);
}
return size;
}
@Override
public int write(final ByteBuffer dstBuf, final Message src) {
int size = 0;
final Object arr = ReflectUtil.justGet(src, targetField);
for (int i = 0; i < Array.getLength(arr); ++i) {
size += elemParser.write(dstBuf, (Message) Array.get(arr, i));
}
return size;
}
@Override
public void patch(Message m, int frameSize, Message frameObj) {
int size = Array.getLength(ReflectUtil.justGet(m, targetField));
sizeField.set(m, size);
}
}
|
