lang/java/reef-common/src/main/java/org/apache/reef/runtime/common/evaluator/task/DriverMessageImpl.java

/*
 * 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.reef.runtime.common.evaluator.task;

import org.apache.reef.task.events.DriverMessage;
import org.apache.reef.util.Optional;

final class DriverMessageImpl implements DriverMessage {
  private final Optional<byte[]> value;

  DriverMessageImpl() {
    this.value = Optional.empty();
  }

  DriverMessageImpl(final byte[] theBytes) {
    this.value = Optional.ofNullable(theBytes);
  }

  @Override
  public Optional<byte[]> get() {
    return this.value;
  }

  @Override
  public String toString() {
    return "DriverMessage{value=" + this.value + '}';
  }
}