heron/api/src/java/org/apache/heron/streamlet/KeyedWindow.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.heron.streamlet;


import java.io.Serializable;

/**
 * Transformation depending on Windowing pass on the window/key information
 * using this class
 */
public class KeyedWindow<T> implements Serializable {
  private static final long serialVersionUID = 4193319775040181971L;
  private T key;
  private Window window;

  KeyedWindow() {
    // nothing really
  }

  public KeyedWindow(T key, Window window) {
    this.key = key;
    this.window = window;
  }

  public T getKey() {
    return key;
  }
  public Window getWindow() {
    return window;
  }
  @Override
  public String toString() {
    return "{ Key: " + String.valueOf(key) + " Window: " + window.toString() + " }";
  }
}