forked from mongodb/mongo-java-driver
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathBSONByteBuffer.java
More file actions
146 lines (119 loc) · 3.61 KB
/
Copy pathBSONByteBuffer.java
File metadata and controls
146 lines (119 loc) · 3.61 KB
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
/*
* Copyright (c) 2008-2014 MongoDB, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.bson.io;
import org.bson.BSONException;
import java.io.UnsupportedEncodingException;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
/**
* Pseudo byte buffer, delegates as it is too hard to properly override / extend the ByteBuffer API
*
* @author brendan
*/
public class BSONByteBuffer {
private BSONByteBuffer( ByteBuffer buf ){
this.buf = buf;
buf.order( ByteOrder.LITTLE_ENDIAN );
}
public static BSONByteBuffer wrap( byte[] bytes, int offset, int length ){
return new BSONByteBuffer( ByteBuffer.wrap( bytes, offset, length ) );
}
public static BSONByteBuffer wrap( byte[] bytes ){
return new BSONByteBuffer( ByteBuffer.wrap( bytes ) );
}
public byte get( int i ){
return buf.get(i);
}
public ByteBuffer get( byte[] bytes, int offset, int length ){
return buf.get(bytes, offset, length);
}
public ByteBuffer get( byte[] bytes ){
return buf.get(bytes);
}
public byte[] array(){
return buf.array();
}
public String toString(){
return buf.toString();
}
public int hashCode(){
return buf.hashCode();
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
BSONByteBuffer that = (BSONByteBuffer) o;
if (buf != null ? !buf.equals(that.buf) : that.buf != null) return false;
return true;
}
/**
* Gets a Little Endian Integer
*
* @param i Index to read from
*
* @return
*/
public int getInt( int i ){
return getIntLE( i );
}
public int getIntLE( int i ){
int x = 0;
x |= ( 0xFF & buf.get( i + 0 ) ) << 0;
x |= ( 0xFF & buf.get( i + 1 ) ) << 8;
x |= ( 0xFF & buf.get( i + 2 ) ) << 16;
x |= ( 0xFF & buf.get( i + 3 ) ) << 24;
return x;
}
public int getIntBE( int i ){
int x = 0;
x |= ( 0xFF & buf.get( i + 0 ) ) << 24;
x |= ( 0xFF & buf.get( i + 1 ) ) << 16;
x |= ( 0xFF & buf.get( i + 2 ) ) << 8;
x |= ( 0xFF & buf.get( i + 3 ) ) << 0;
return x;
}
public long getLong( int i ){
return buf.getLong( i );
}
public String getCString(int offset) {
int end = offset;
while (get(end) != 0) {
++end;
}
int len = end - offset;
return new String(array(), offset, len);
}
public String getUTF8String(int valueOffset) {
int size = getInt(valueOffset) - 1;
try {
return new String(array(), valueOffset + 4, size, "UTF-8");
} catch (UnsupportedEncodingException e) {
throw new BSONException( "Cannot decode string as UTF-8." );
}
}
public Buffer position( int i ){
return buf.position(i);
}
public Buffer reset(){
return buf.reset();
}
public int size(){
return getInt( 0 );
}
protected ByteBuffer buf;
}