| /* |
| * 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.protonj2.types; |
| |
| import java.math.BigInteger; |
| |
| public final class UnsignedLong extends Number implements Comparable<UnsignedLong> { |
| |
| private static final long serialVersionUID = -5901821450224443596L; |
| 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]; |
| public static final UnsignedLong ONE = cachedValues[1]; |
| public static final UnsignedLong MAX_VALUE = new UnsignedLong(0xffffffffffffffffl); |
| |
| private final long underlying; |
| |
| public UnsignedLong(long underlying) { |
| this.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 longValue(); |
| } |
| |
| @Override |
| public double doubleValue() { |
| return 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; |
| } |
| |
| /** |
| * Compares the give long value to this {@link UnsignedLong} numerically treating the given value as unsigned. |
| * |
| * @param value |
| * the long to compare to this {@link UnsignedLong} instance. |
| * |
| * @return the value 0 if this == value; a value less than 0 if this < value as unsigned values; and a value |
| * greater than 0 if this > value as unsigned values |
| */ |
| public int compareTo(long value) { |
| return Long.compareUnsigned(underlying, value); |
| } |
| |
| @Override |
| public int compareTo(UnsignedLong o) { |
| return bigIntegerValue().compareTo(o.bigIntegerValue()); |
| } |
| |
| /** |
| * Compares two long values numerically treating the values as unsigned. |
| * |
| * @param left |
| * the left hand side long to compare |
| * @param right |
| * the right hand side long to compare |
| * |
| * @return the value 0 if left == right; a value less than 0 if left < right as unsigned values; and a value |
| * greater than 0 if left > right as unsigned values |
| */ |
| public static int compare(long left, long right) { |
| return Long.compareUnsigned(left, right); |
| } |
| |
| @Override |
| public int hashCode() { |
| return (int) (underlying ^ (underlying >>> 32)); |
| } |
| |
| @Override |
| public String toString() { |
| return String.valueOf(bigIntegerValue()); |
| } |
| |
| /** |
| * Returns an UnsignedLong instance representing the specified int value. This method always returns |
| * a cached {@link UnsignedLong} instance for values in the range [0...255] which can save space and time |
| * over calling the constructor {@link UnsignedLong#UnsignedLong(long)} which will always create a new |
| * instance of the {@link UnsignedLong} type. |
| * |
| * @param value |
| * The long value to return as an {@link UnsignedLong} instance. |
| * |
| * @return an {@link UnsignedLong} instance representing the unsigned view of the given long. |
| */ |
| public static UnsignedLong valueOf(long value) { |
| if ((value & 0xFFL) == value) { |
| return cachedValues[(int) value]; |
| } else { |
| return new UnsignedLong(value); |
| } |
| } |
| |
| /** |
| * Returns an {@link UnsignedLong} instance representing the specified {@link String} value. This method |
| * always returns a cached {@link UnsignedLong} instance for values in the range [0...255] which can save |
| * space and time over calling the constructor {@link UnsignedLong#UnsignedLong(long)} which will always |
| * create a new instance of the {@link UnsignedLong} type. |
| * |
| * @param value |
| * The String value to return as an {@link UnsignedLong} instance. |
| * |
| * @return an {@link UnsignedLong} instance representing the unsigned view of the given String. |
| * |
| * @throws NumberFormatException if the given value is greater than the max {@link UnsignedLong} value possible |
| * or the {@link String} value given cannot be converted to a numeric value. |
| */ |
| public static UnsignedLong valueOf(final String value) { |
| BigInteger bigInt = new BigInteger(value); |
| |
| return valueOf(bigInt); |
| } |
| |
| /** |
| * Returns an {@link UnsignedLong} instance representing the specified {@link BigInteger} value. This method |
| * always returns a cached {@link UnsignedLong} instance for values in the range [0...255] which can save |
| * space and time over calling the constructor {@link UnsignedLong#UnsignedLong(long)} which will always |
| * create a new instance of the {@link UnsignedLong} type. |
| * |
| * @param value |
| * The {@link BigInteger} value to return as an {@link UnsignedLong} instance. |
| * |
| * @return an {@link UnsignedLong} instance representing the unsigned view of the given {@link BigInteger}. |
| * |
| * @throws NumberFormatException if the given value is greater than the max {@link UnsignedLong} value possible. |
| */ |
| public static UnsignedLong valueOf(BigInteger value) { |
| if (value.signum() == -1 || value.bitLength() > 64) { |
| throw new NumberFormatException("Value \"" + value + "\" lies outside the range [0 - 2^64)."); |
| } else if (value.compareTo(LONG_MAX_VALUE) >= 0) { |
| return UnsignedLong.valueOf(value.longValue()); |
| } else { |
| return UnsignedLong.valueOf(TWO_TO_THE_SIXTY_FOUR.subtract(value).negate().longValue()); |
| } |
| } |
| } |