com.mongodb.DefaultDBEncoder Maven / Gradle / Ivy
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/*
* Copyright 2008-present 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.BSONObject;
import org.bson.BasicBSONEncoder;
import org.bson.io.OutputBuffer;
/**
* The default BSON encoder for BSONObject instances.
*/
public class DefaultDBEncoder extends BasicBSONEncoder implements DBEncoder {
@Override
public int writeObject(final OutputBuffer outputBuffer, final BSONObject document) {
set(outputBuffer);
int x = putObject(document);
done();
return x;
}
@Override
protected boolean putSpecial(final String name, final Object value) {
if (value instanceof DBRef) {
putDBRef(name, (DBRef) value);
return true;
} else {
return false;
}
}
/**
* Deals with encoding database references.
*
* @param name the name of the field in the document
* @param ref the database reference object
*/
protected void putDBRef(final String name, final DBRef ref) {
BasicDBObject dbRefDocument = new BasicDBObject("$ref", ref.getCollectionName()).append("$id", ref.getId());
if (ref.getDatabaseName() != null) {
dbRefDocument.put("$db", ref.getDatabaseName());
}
putObject(name, dbRefDocument);
}
@Override
public String toString() {
return String.format("DBEncoder{class=%s}", getClass().getName());
}
public static final DBEncoderFactory FACTORY = new DBEncoderFactory() {
@Override
public DBEncoder create() {
return new DefaultDBEncoder();
}
};
}