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62 lines (53 loc) · 1.88 KB
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/*
* 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 com.mongodb;
import org.bson.LazyBSONCallback;
import org.bson.types.ObjectId;
import java.util.Iterator;
import java.util.List;
import java.util.logging.Logger;
/**
*
*/
public class LazyDBCallback extends LazyBSONCallback implements DBCallback {
public LazyDBCallback( DBCollection coll ){
_collection = coll;
_db = _collection == null ? null : _collection.getDB();
}
@Override
public Object createObject( byte[] data, int offset ){
LazyDBObject o = new LazyDBObject( data, offset, this );
//log.info("Created inner BSONObject: " + o);
// need to detect DBRef but must make sure we dont search through all fields
// $ref must be 1st key
Iterator it = o.keySet().iterator();
if ( it.hasNext() && it.next().equals( "$ref" ) &&
o.containsField( "$id" ) ){
return new DBRef( _db, o );
}
return o;
}
@Override
public List createArray(byte[] data, int offset) {
return new LazyDBList(data, offset, this);
}
public Object createDBRef( String ns, ObjectId id ){
return new DBRef( _db, ns, id );
}
final DBCollection _collection;
final DB _db;
private static final Logger log = Logger.getLogger( LazyDBCallback.class.getName() );
}