forked from mongodb/mongo-java-driver
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathLazyBSONDecoder.java
More file actions
71 lines (60 loc) · 2.32 KB
/
Copy pathLazyBSONDecoder.java
File metadata and controls
71 lines (60 loc) · 2.32 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
/*
* 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;
import org.bson.io.Bits;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Logger;
/**
* implementation of BSONDecoder that creates LazyBSONObject instances
*/
public class LazyBSONDecoder implements BSONDecoder {
static final Logger LOG = Logger.getLogger( LazyBSONDecoder.class.getName() );
public BSONObject readObject(byte[] b) {
try {
return readObject( new ByteArrayInputStream( b ) );
}
catch ( IOException ioe ){
throw new BSONException( "should be impossible" , ioe );
}
}
public BSONObject readObject(InputStream in) throws IOException {
BSONCallback c = new LazyBSONCallback();
decode( in , c );
return (BSONObject)c.get();
}
public int decode(byte[] b, BSONCallback callback) {
try {
return decode( new ByteArrayInputStream( b ), callback );
}
catch ( IOException ioe ) {
throw new BSONException( "should be impossible" , ioe );
}
}
public int decode(InputStream in, BSONCallback callback) throws IOException {
byte[] objSizeBuffer = new byte[BYTES_IN_INTEGER];
Bits.readFully(in, objSizeBuffer, 0, BYTES_IN_INTEGER);
int objSize = Bits.readInt(objSizeBuffer);
byte[] data = new byte[objSize];
System.arraycopy(objSizeBuffer, 0, data, 0, BYTES_IN_INTEGER);
Bits.readFully(in, data, BYTES_IN_INTEGER, objSize - BYTES_IN_INTEGER);
// note that we are handing off ownership of the data byte array to the callback
callback.gotBinary(null, (byte) 0, data);
return objSize;
}
private static int BYTES_IN_INTEGER = 4;
}