runtime/executor/src/main/java/org/apache/nemo/runtime/executor/TransformContextImpl.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.nemo.runtime.executor;

import org.apache.nemo.common.ir.vertex.transform.Transform;
import org.apache.nemo.runtime.executor.data.BroadcastManagerWorker;

import java.io.Serializable;
import java.util.Optional;

/**
 * Transform Context Implementation.
 */
public final class TransformContextImpl implements Transform.Context {
  private final BroadcastManagerWorker broadcastManagerWorker;
  private String data;

  /**
   * Constructor of Context Implementation.
   *
   * @param broadcastManagerWorker for broadcast variables.
   */
  public TransformContextImpl(final BroadcastManagerWorker broadcastManagerWorker) {
    this.broadcastManagerWorker = broadcastManagerWorker;
    this.data = null;
  }

  @Override
  public Object getBroadcastVariable(final Serializable tag) {
    return broadcastManagerWorker.get(tag);
  }

  @Override
  public void setSerializedData(final String serializedData) {
    this.data = serializedData;
  }

  @Override
  public Optional<String> getSerializedData() {
    return Optional.ofNullable(this.data);
  }
}