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/*
 * ToroDB
 * Copyright © 2014 8Kdata Technology (www.8kdata.com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see .
 */

package com.torodb.backend.converters.json;

import com.google.common.io.ByteSource;
import com.torodb.backend.converters.ValueConverter;
import com.torodb.common.util.HexUtils;
import com.torodb.kvdocument.values.KvBinary;
import com.torodb.kvdocument.values.KvBinary.KvBinarySubtype;
import com.torodb.kvdocument.values.heap.ByteSourceKvBinary;

/**
 *
 */
public class BinaryValueToJsonConverter implements
    ValueConverter {

  private static final long serialVersionUID = 1L;

  @Override
  public Class getJsonClass() {
    return String.class;
  }

  @Override
  public Class getValueClass() {
    return KvBinary.class;
  }

  @Override
  public KvBinary toValue(String value) {
    if (!value.startsWith("\\x")) {
      throw new RuntimeException(
          "A bytea in escape format was expected, but " + value
          + " was found"
      );
    }
    return new ByteSourceKvBinary(
        KvBinarySubtype.MONGO_GENERIC,
        (byte) 0,
        ByteSource.wrap(HexUtils.hex2Bytes(value.substring(2)))
    );
  }
}