ValueEventData.java

// Copyright (c) FIRST and other WPILib contributors.
// Open Source Software; you can modify and/or share it under the terms of
// the WPILib BSD license file in the root directory of this project.
 
package org.wpilib.networktables;

public final class ValueEventData {
  public final int topic;

  public final int subentry;

  public final NetworkTableValue value;

  public ValueEventData(
      NetworkTableInstance inst, int topic, int subentry, NetworkTableValue value) {
    this.m_inst = inst;
    this.topic = topic;
    this.subentry = subentry;
    this.value = value;
  }
 
  /* Cached topic object. */
  private Topic m_topicObject;
 
  private final NetworkTableInstance m_inst;

  public Topic getTopic() {
    if (m_topicObject == null) {
      m_topicObject = new Topic(m_inst, topic);
    }
    return m_topicObject;
  }
}