Package co.cask.cdap.hive.context

Source Code of co.cask.cdap.hive.context.CConfCodec

/*
* Copyright © 2014 Cask Data, 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 co.cask.cdap.hive.context;

import co.cask.cdap.common.conf.CConfiguration;
import co.cask.cdap.common.io.Codec;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

/**
* Codec to encode/decode CConfiguration object.
*/
public class CConfCodec implements Codec<CConfiguration> {
  public static final CConfCodec INSTANCE = new CConfCodec();

  private CConfCodec() {
    // Use the static INSTANCE to get an instance.
  }

  @Override
  public byte[] encode(CConfiguration object) throws IOException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    object.writeXml(bos);
    bos.close();
    return bos.toByteArray();
  }

  @Override
  public CConfiguration decode(byte[] data) throws IOException {
    if (data == null) {
      return CConfiguration.create();
    }

    ByteArrayInputStream bin = new ByteArrayInputStream(data);
    CConfiguration cConfiguration = CConfiguration.create();
    cConfiguration.clear();
    cConfiguration.addResource(bin);
    return cConfiguration;
  }
}
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