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The OpenTripPlanner multimodal journey planning system

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package org.opentripplanner.apis.gtfs.model;

import graphql.relay.ConnectionCursor;
import java.time.Duration;
import java.util.Objects;

public class PlanPageInfo {

  private final ConnectionCursor startCursor;
  private final ConnectionCursor endCursor;
  private final boolean hasPreviousPage;
  private final boolean hasNextPage;
  private final Duration searchWindowUsed;

  public PlanPageInfo(
    ConnectionCursor startCursor,
    ConnectionCursor endCursor,
    boolean hasPreviousPage,
    boolean hasNextPage,
    Duration searchWindowUsed
  ) {
    this.startCursor = startCursor;
    this.endCursor = endCursor;
    this.hasPreviousPage = hasPreviousPage;
    this.hasNextPage = hasNextPage;
    this.searchWindowUsed = searchWindowUsed;
  }

  public ConnectionCursor startCursor() {
    return startCursor;
  }

  public ConnectionCursor endCursor() {
    return endCursor;
  }

  public boolean hasPreviousPage() {
    return hasPreviousPage;
  }

  public boolean hasNextPage() {
    return hasNextPage;
  }

  public Duration searchWindowUsed() {
    return searchWindowUsed;
  }

  @Override
  public int hashCode() {
    return Objects.hash(
      startCursor == null ? null : startCursor.getValue(),
      endCursor == null ? null : endCursor.getValue(),
      hasPreviousPage,
      hasNextPage,
      searchWindowUsed
    );
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }
    PlanPageInfo that = (PlanPageInfo) o;
    return (
      equalsCursors(startCursor, that.startCursor) &&
      equalsCursors(endCursor, that.endCursor) &&
      Objects.equals(searchWindowUsed, that.searchWindowUsed) &&
      hasPreviousPage == that.hasPreviousPage &&
      hasNextPage == that.hasNextPage
    );
  }

  /**
   * Only checks that the values of the cursors are equal and ignores rest of the fields.
   */
  private static boolean equalsCursors(ConnectionCursor a, ConnectionCursor b) {
    return (
      (a == null && b == null) ||
      (a != null && b != null && Objects.equals(a.getValue(), b.getValue()))
    );
  }
}