/*
* Copyright (C) 2011 Benoit GUEROUT <bguerout at gmail dot com> and Yves AMSELLEM <amsellem dot yves at gmail dot com>
*
* 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.jongo.bson;
import com.mongodb.*;
import com.mongodb.gridfs.GridFSDBFile;
import org.bson.LazyBSONCallback;
import java.util.Iterator;
public class BsonDBDecoder extends LazyDBDecoder implements DBDecoder {
public final static DBDecoderFactory FACTORY = new BsonDBDecoderFactory();
private BsonDBDecoder() {
}
public DBCallback getDBCallback(DBCollection collection) {
return new BsonDBCallback(collection);
}
private static class BsonDBDecoderFactory implements DBDecoderFactory {
public DBDecoder create() {
return new BsonDBDecoder();
}
}
private static class BsonDBCallback extends LazyDBCallback {
private final DB db;
private final DBCollection collection;
public BsonDBCallback(DBCollection collection) {
super(collection);
this.collection = collection;
this.db = collection == null ? null : collection.getDB();
}
@Override
public Object createObject(byte[] data, int offset) {
if (GridFSDBFile.class.equals(collection.getObjectClass())) {
return DefaultDBDecoder.FACTORY.create().decode(data, collection);
}
DBObject dbo = new RelaxedLazyDBObject(data, new LazyBSONCallback());
Iterator it = dbo.keySet().iterator();
if (it.hasNext() && it.next().equals("$ref") && dbo.containsField("$id")) {
return new DBRef(db, dbo);
}
return dbo;
}
}
}