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2 | 2 |
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3 | 3 | package com.mongodb; |
4 | 4 |
|
5 | | -import java.util.*; |
6 | | -import java.util.logging.*; |
7 | 5 |
|
8 | 6 | import org.bson.*; |
9 | | -import org.bson.types.*; |
10 | 7 |
|
11 | 8 | /** |
12 | | - * This class overrides BasicBSONCallback to implement some extra features specific to the Database. |
13 | | - * For example DBRef type. |
14 | | - * @author antoine |
| 9 | + * The DB callback interface. |
15 | 10 | */ |
16 | | -public class DBCallback extends BasicBSONCallback { |
| 11 | +public interface DBCallback extends BSONCallback { |
17 | 12 |
|
18 | | - public static interface Factory { |
19 | | - public DBCallback create( DBCollection collection ); |
20 | | - } |
21 | | - |
22 | | - static class DefaultFactory implements Factory { |
23 | | - @Override |
24 | | - public DBCallback create( DBCollection collection ){ |
25 | | - return new DBCallback( collection ); |
26 | | - } |
27 | | - } |
28 | | - |
29 | | - public static Factory FACTORY = new DefaultFactory(); |
30 | | - |
31 | | - public DBCallback( DBCollection coll ){ |
32 | | - _collection = coll; |
33 | | - _db = _collection == null ? null : _collection.getDB(); |
34 | | - } |
35 | | - |
36 | | - @Override |
37 | | - @SuppressWarnings("deprecation") |
38 | | - public void gotDBRef( String name , String ns , ObjectId id ){ |
39 | | - if ( id.equals( Bytes.COLLECTION_REF_ID ) ) |
40 | | - cur().put( name , _collection ); |
41 | | - else |
42 | | - cur().put( name , new DBPointer( (DBObject)cur() , name , _db , ns , id ) ); |
43 | | - } |
44 | | - |
45 | | - @Override |
46 | | - public void objectStart(boolean array, String name){ |
47 | | - _lastName = name; |
48 | | - super.objectStart( array , name ); |
49 | | - } |
50 | | - |
51 | | - @Override |
52 | | - public Object objectDone(){ |
53 | | - BSONObject o = (BSONObject)super.objectDone(); |
54 | | - if ( ! ( o instanceof List ) && |
55 | | - o.containsField( "$ref" ) && |
56 | | - o.containsField( "$id" ) ){ |
57 | | - return cur().put( _lastName , new DBRef( _db, o ) ); |
58 | | - } |
59 | | - |
60 | | - return o; |
61 | | - } |
62 | | - |
63 | | - @Override |
64 | | - public BSONObject create(){ |
65 | | - return _create( null ); |
66 | | - } |
67 | | - |
68 | | - @Override |
69 | | - public BSONObject create( boolean array , List<String> path ){ |
70 | | - if ( array ) |
71 | | - return new BasicDBList(); |
72 | | - return _create( path ); |
73 | | - } |
74 | | - |
75 | | - private DBObject _create( List<String> path ){ |
76 | | - |
77 | | - Class c = null; |
78 | | - |
79 | | - if ( _collection != null && _collection._objectClass != null){ |
80 | | - if ( path == null || path.size() == 0 ){ |
81 | | - c = _collection._objectClass; |
82 | | - } |
83 | | - else { |
84 | | - StringBuilder buf = new StringBuilder(); |
85 | | - for ( int i=0; i<path.size(); i++ ){ |
86 | | - if ( i > 0 ) |
87 | | - buf.append("."); |
88 | | - buf.append( path.get(i) ); |
89 | | - } |
90 | | - c = _collection.getInternalClass( buf.toString() ); |
91 | | - } |
92 | | - |
93 | | - } |
94 | | - |
95 | | - if ( c != null ){ |
96 | | - try { |
97 | | - return (DBObject)c.newInstance(); |
98 | | - } |
99 | | - catch ( InstantiationException ie ){ |
100 | | - LOGGER.log( Level.FINE , "can't create a: " + c , ie ); |
101 | | - throw new MongoInternalException( "can't instantiate a : " + c , ie ); |
102 | | - } |
103 | | - catch ( IllegalAccessException iae ){ |
104 | | - LOGGER.log( Level.FINE , "can't create a: " + c , iae ); |
105 | | - throw new MongoInternalException( "can't instantiate a : " + c , iae ); |
106 | | - } |
107 | | - } |
108 | | - |
109 | | - if ( _collection != null && _collection._name.equals( "$cmd" ) ) |
110 | | - return new CommandResult(); |
111 | | - return new BasicDBObject(); |
112 | | - } |
113 | | - |
114 | | - DBObject dbget(){ |
115 | | - DBObject o = (DBObject)get(); |
116 | | - return o; |
117 | | - } |
118 | | - |
119 | | - @Override |
120 | | - public void reset(){ |
121 | | - _lastName = null; |
122 | | - super.reset(); |
123 | | - } |
124 | | - |
125 | | - private String _lastName; |
126 | | - final DBCollection _collection; |
127 | | - final DB _db; |
128 | | - static final Logger LOGGER = Logger.getLogger( "com.mongo.DECODING" ); |
129 | 13 | } |
| 14 | + |
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