heron/api/src/java/com/twitter/heron/api/windowing/TupleWindowImpl.java

//  Copyright 2017 Twitter. All rights reserved.
//
//  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 com.twitter.heron.api.windowing;

import java.util.List;

import com.twitter.heron.api.tuple.Tuple;

/**
 * Holds the expired, new and current tuples in a window.
 */
public class TupleWindowImpl implements TupleWindow {
  private final List<Tuple> tuples;
  private final List<Tuple> newTuples;
  private final List<Tuple> expiredTuples;
  private final Long startTimestamp;
  private final Long endTimestamp;

  public TupleWindowImpl(List<Tuple> tuples, List<Tuple> newTuples, List<Tuple> expiredTuples,
                         Long startTimestamp, Long endTimestamp) {
    this.tuples = tuples;
    this.newTuples = newTuples;
    this.expiredTuples = expiredTuples;
    this.startTimestamp = startTimestamp;
    this.endTimestamp = endTimestamp;
  }

  @Override
  public List<Tuple> get() {
    return tuples;
  }

  @Override
  public List<Tuple> getNew() {
    return newTuples;
  }

  @Override
  public List<Tuple> getExpired() {
    return expiredTuples;
  }

  @Override
  public Long getStartTimestamp() {
    return startTimestamp;
  }

  @Override
  public Long getEndTimestamp() {
    return endTimestamp;
  }

  @Override
  public String toString() {
    return "TupleWindowImpl{" + "tuples=" + tuples + ", newTuples=" + newTuples + ", expiredTuples="
        + expiredTuples + '}';
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }

    TupleWindowImpl that = (TupleWindowImpl) o;

    if (tuples != null ? !tuples.equals(that.tuples) : that.tuples != null) {
      return false;
    }
    if (newTuples != null ? !newTuples.equals(that.newTuples) : that.newTuples != null) {
      return false;
    }
    return expiredTuples != null ? expiredTuples.equals(that.expiredTuples)
        : that.expiredTuples == null;

  }

  @Override
  public int hashCode() {
    int result = tuples != null ? tuples.hashCode() : 0;
    result = 31 * result + (newTuples != null ? newTuples.hashCode() : 0);
    result = 31 * result + (expiredTuples != null ? expiredTuples.hashCode() : 0);
    return result;
  }
}