TunableLong.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.tunable;
 
import java.util.function.LongConsumer;
import java.util.function.LongSupplier;

public abstract class TunableLong extends TunableBase implements LongSupplier, LongConsumer {
  public static TunableLong create() {
    return create(0);
  }

  public static TunableLong create(long initialValue) {
    return createConfig(initialValue, null);
  }

  public static TunableLong create(LongSupplier getter, LongConsumer setter) {
    return createConfig(getter, setter, null);
  }

  public static TunableLong createConfig(TunableConfig config) {
    return createConfig(0, config);
  }

  public static TunableLong createConfig(long initialValue, TunableConfig config) {
    return new TunableLong(config, true) {
      @Override
      public void set(long value) {
        if (m_value == value) {
          return;
        }
        m_value = value;
        markChanged();
      }
 
      @Override
      public long get() {
        return m_value;
      }
 
      private long m_value = initialValue;
    };
  }

  public static TunableLong createConfig(
      LongSupplier getter, LongConsumer setter, TunableConfig config) {
    if (config == null) {
      config = TunableConfig.of(TunableOption.ALWAYS_GET);
    } else if (config.getPolling() == TunableConfig.Polling.DEFAULT) {
      config = config.withPolling(TunableConfig.Polling.ALWAYS_GET);
    }
    return new TunableLong(config, true) {
      @Override
      public void set(long value) {
        boolean changed = getter.getAsLong() != value;
        if (setter != null) {
          setter.accept(value);
        }
        if (changed) {
          markChanged();
        }
      }
 
      @Override
      public long get() {
        return getter.getAsLong();
      }
    };
  }

  protected TunableLong(TunableConfig config) {
    super(config);
  }

  protected TunableLong(TunableConfig config, boolean supportsChangeNotification) {
    super(config, supportsChangeNotification);
  }

  public abstract void set(long value);

  public abstract long get();
 
  @Override
  public long getAsLong() {
    return get();
  }
 
  @Override
  public void accept(long value) {
    set(value);
  }
}