blob: de67cf6fa2acdefc16a273303336ed018993fdcb [file] [log] [blame]
// Copyright (c) 2019, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package com.android.tools.r8.utils;
import java.util.Comparator;
import java.util.Objects;
import java.util.function.Supplier;
public class Box<T> {
private T value;
public Box() {}
public Box(T initialValue) {
set(initialValue);
}
public T computeIfAbsent(Supplier<T> supplier) {
if (value == null) {
value = supplier.get();
}
return value;
}
public T get() {
return value;
}
public void set(T value) {
this.value = value;
}
public void setMin(T element, Comparator<T> comparator) {
if (!isSet() || comparator.compare(element, get()) < 0) {
set(element);
}
}
public boolean isSet() {
return value != null;
}
public T getAndSet(T newValue) {
T oldValue = value;
value = newValue;
return oldValue;
}
@Override
public boolean equals(Object object) {
if (object == null || getClass() != object.getClass()) {
return false;
}
Box<?> box = (Box<?>) object;
return Objects.equals(value, box.value);
}
@Override
public int hashCode() {
return Objects.hashCode(value);
}
}