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The RabbitMQ Stream Java client library allows Java applications to interface with RabbitMQ Stream.

There is a newer version: 0.20.0

// Copyright (c) 2020-2021 VMware, Inc. or its affiliates.  All rights reserved.
//
// This software, the RabbitMQ Stream Java client library, is dual-licensed under the
// Mozilla Public License 2.0 ("MPL"), and the Apache License version 2 ("ASL").
// For the MPL, please see LICENSE-MPL-RabbitMQ. For the ASL,
// please see LICENSE-APACHE2.
//
// This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND,
// either express or implied. See the LICENSE file for specific language governing
// rights and limitations of this software.
//
// If you have any questions regarding licensing, please contact us at
// [email protected].
package com.rabbitmq.stream.amqp;

/** This code is based on QPid Proton's {@link org.apache.qpid.proton.amqp.UnsignedByte} class. */
public final class UnsignedByte extends Number
    implements Comparable {
  private static final UnsignedByte[] cachedValues = new UnsignedByte[256];

  static {
    for (int i = 0; i < 256; i++) {
      cachedValues[i] = new UnsignedByte((byte) i);
    }
  }

  private final byte _underlying;

  public UnsignedByte(byte underlying) {
    _underlying = underlying;
  }

  public static UnsignedByte valueOf(byte underlying) {
    final int index = ((int) underlying) & 0xFF;
    return cachedValues[index];
  }

  public static UnsignedByte valueOf(final String value) throws NumberFormatException {
    int intVal = Integer.parseInt(value);
    if (intVal < 0 || intVal >= (1 << 8)) {
      throw new NumberFormatException(
          "Value \"" + value + "\" lies outside the range [" + 0 + "-" + (1 << 8) + ").");
    }
    return valueOf((byte) intVal);
  }

  @Override
  public byte byteValue() {
    return _underlying;
  }

  @Override
  public short shortValue() {
    return (short) intValue();
  }

  @Override
  public int intValue() {
    return ((int) _underlying) & 0xFF;
  }

  @Override
  public long longValue() {
    return ((long) _underlying) & 0xFFl;
  }

  @Override
  public float floatValue() {
    return (float) longValue();
  }

  @Override
  public double doubleValue() {
    return (double) longValue();
  }

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

    UnsignedByte that = (UnsignedByte) o;

    return _underlying == that._underlying;
  }

  public int compareTo(org.apache.qpid.proton.amqp.UnsignedByte o) {
    return Integer.signum(intValue() - o.intValue());
  }

  @Override
  public int hashCode() {
    return _underlying;
  }

  @Override
  public String toString() {
    return String.valueOf(intValue());
  }
}