/*
* 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 com.mongodb.LazyDBObject;
import org.bson.types.ObjectId;
import java.util.List;
/**
* A {@code BSONCallback} for creation of {@code LazyBSONObject} and {@code LazyBSONList} instances.
*/
public class LazyBSONCallback extends EmptyBSONCallback {
@Override
public void reset(){
_root = null;
}
@Override
public Object get(){
return _root;
}
@Override
public void gotBinary( String name, byte type, byte[] data ){
setRootObject( createObject( data, 0 ) );
}
/**
* @deprecated This method is NOT a part of public API and will be dropped in 3.x versions.
*/
@Deprecated
public void setRootObject( Object root ){
_root = root;
}
/**
* Create a {@code LazyBSONObject} instance from the given bytes starting from the given offset.
*
* @param bytes the raw BSON bytes
* @param offset the offset into the bytes
* @return the LazyBSONObject
*/
public Object createObject( byte[] bytes, int offset ){
return new LazyDBObject( bytes, offset, this );
}
/**
* Create a {@code LazyBSONList} from the given bytes starting from the given offset.
*
* @param bytes the raw BSON bytes
* @param offset the offset into the bytes
* @return the LazyBSONList
*/
@SuppressWarnings("rawtypes")
public List createArray( byte[] bytes, int offset ){
return new LazyBSONList( bytes, offset, this );
}
/**
* This is a factory method pattern to create appropriate objects for BSON type DBPointer(0x0c).
*
* @param ns the namespace of the reference
* @param id the identifier of the reference
* @return object to be used as reference representation
*/
public Object createDBRef( String ns, ObjectId id ){
return new BasicBSONObject( "$ns", ns ).append( "$id", id );
}
private Object _root;
}