| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| |
| package org.apache.qpid.proton.amqp; |
| |
| import java.math.BigInteger; |
| |
| public final class UnsignedLong extends Number implements Comparable<UnsignedLong> |
| { |
| private static final BigInteger TWO_TO_THE_SIXTY_FOUR = new BigInteger( new byte[] { (byte) 1, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0 }); |
| private static final BigInteger LONG_MAX_VALUE = BigInteger.valueOf(Long.MAX_VALUE); |
| |
| private static final UnsignedLong[] cachedValues = new UnsignedLong[256]; |
| |
| static |
| { |
| for(int i = 0; i<256; i++) |
| { |
| cachedValues[i] = new UnsignedLong(i); |
| } |
| } |
| |
| public static final UnsignedLong ZERO = cachedValues[0]; |
| |
| private final long _underlying; |
| |
| |
| public UnsignedLong(long underlying) |
| { |
| _underlying = underlying; |
| } |
| |
| @Override |
| public int intValue() |
| { |
| return (int) _underlying; |
| } |
| |
| @Override |
| public long longValue() |
| { |
| return _underlying; |
| } |
| |
| public BigInteger bigIntegerValue() |
| { |
| if(_underlying >= 0L) |
| { |
| return BigInteger.valueOf(_underlying); |
| } |
| else |
| { |
| return TWO_TO_THE_SIXTY_FOUR.add(BigInteger.valueOf(_underlying)); |
| } |
| } |
| |
| @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; |
| } |
| |
| UnsignedLong that = (UnsignedLong) o; |
| |
| if (_underlying != that._underlying) |
| { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| public int compareTo(UnsignedLong o) |
| { |
| return bigIntegerValue().compareTo(o.bigIntegerValue()); |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return (int)(_underlying ^ (_underlying >>> 32)); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return String.valueOf(bigIntegerValue()); |
| } |
| |
| public static UnsignedLong valueOf(long underlying) |
| { |
| if((underlying & 0xFFL) == underlying) |
| { |
| return cachedValues[(int)underlying]; |
| } |
| else |
| { |
| return new UnsignedLong(underlying); |
| } |
| } |
| |
| public static UnsignedLong valueOf(final String value) |
| { |
| BigInteger bigInt = new BigInteger(value); |
| |
| return valueOf(bigInt); |
| } |
| |
| public static UnsignedLong valueOf(BigInteger bigInt) |
| { |
| if(bigInt.signum() == -1 || bigInt.bitLength() > 64) |
| { |
| throw new NumberFormatException("Value \""+bigInt+"\" lies outside the range [0 - 2^64)."); |
| } |
| else if(bigInt.compareTo(LONG_MAX_VALUE)>=0) |
| { |
| return UnsignedLong.valueOf(bigInt.longValue()); |
| } |
| else |
| { |
| return UnsignedLong.valueOf(TWO_TO_THE_SIXTY_FOUR.subtract(bigInt).negate().longValue()); |
| } |
| } |
| } |