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
|
/*
This file is part of GNUnet.
Copyright (C) 2011, 2012 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
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;
import java.util.List;
public class IntegerFillParser implements Parser {
private final Field targetField;
private final boolean signed;
private final int byteSize;
public IntegerFillParser(Field targetField,
boolean signed, int byteSize) {
this.targetField = targetField;
this.signed = signed;
this.byteSize = byteSize;
}
@Override
public int getSize(Message srcObj) {
final Object arr = ReflectUtil.justGet(srcObj, targetField);
if (arr == null) {
throw new RuntimeException("array not initialized");
}
return byteSize * Array.getLength(arr);
}
@Override
public int parse(ByteBuffer srcBuf, int frameStart, Message frameObj, Message dstObj, List<Field> frameSizePath) {
if (frameSizePath == null) {
throw new AssertionError("IntegerFillParser expects a non-null frameSizePath. Did you specify a @FrameSize field?");
}
final int frameSize = ReflectUtil.justGetInt(frameObj, frameSizePath);
int remaining = frameStart + frameSize - srcBuf.position();
int elemNumber = remaining / byteSize;
@SuppressWarnings("unchecked")
final Class<Message> arrayElementType = (Class<Message>) targetField.getType().getComponentType();
if (!arrayElementType.isPrimitive()) {
throw new AssertionError("IntegerFillParser is expected to be of primitive type, not " + arrayElementType);
}
final Object arr = Array.newInstance(arrayElementType, elemNumber);
ReflectUtil.justSet(dstObj, targetField, arr);
for (int i = 0; i < elemNumber; ++i) {
long v = IntegerUtil.readLong(srcBuf, signed, byteSize);
ReflectUtil.justSetArray(arr, i, v);
}
return remaining;
}
@Override
public int write(ByteBuffer dstBuf, Message srcObj) {
final Object arr = ReflectUtil.justGet(srcObj, targetField);
if (arr == null) {
throw new RuntimeException("array not initialized");
}
for (int i = 0; i < Array.getLength(arr); ++i) {
IntegerUtil.writeLong(Array.getLong(arr, i), dstBuf, signed, byteSize);
}
return getSize(srcObj);
}
@Override
public void patch(Message m, int frameSize, List<Field> frameSizePath, Message frameObj) {
if (frameSizePath == null) {
throw new AssertionError("IntegerFillParser expects a non-null frameSizePath. Did you specify a @FrameSize field?");
}
ReflectUtil.justSetInt(frameObj, frameSizePath, frameSize);
}
@Override
public int getStaticSize() {
// not known
return 0;
}
}
|