/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.gora.mongodb.utils;

import java.nio.ByteBuffer;

import org.apache.avro.util.Utf8;

import com.mongodb.DBEncoder;
import com.mongodb.DBEncoderFactory;
import com.mongodb.DefaultDBEncoder;

/**
 * BSON encoder for BSONObject instances.
 */
public class GoraDBEncoder extends DefaultDBEncoder {

  public static DBEncoderFactory FACTORY = new DefaultFactory();

  @Override
  protected boolean putSpecial(String name, Object val) {
    if (val instanceof Utf8) {
      putString(name, val.toString());
      return true;
    } else if (val instanceof ByteBuffer) {
      putBinary(name, ((ByteBuffer) val).array());
      return true;
    } else {
      return super.putSpecial(name, val);
    }
  }

  static class DefaultFactory implements DBEncoderFactory {

    @Override
    public DBEncoder create() {
      return new GoraDBEncoder();
    }
  }

}
