| /* |
| * 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; |
| |
| public final class UnsignedInteger extends Number implements Comparable<UnsignedInteger> { |
| |
| private static final long serialVersionUID = 3042749852724499995L; |
| private static final UnsignedInteger[] cachedValues = new UnsignedInteger[256]; |
| |
| static { |
| for (int i = 0; i < 256; i++) { |
| cachedValues[i] = new UnsignedInteger(i); |
| } |
| } |
| |
| public static final UnsignedInteger ZERO = cachedValues[0]; |
| public static final UnsignedInteger ONE = cachedValues[1]; |
| public static final UnsignedInteger MAX_VALUE = new UnsignedInteger(0xffffffff); |
| |
| private final int underlying; |
| |
| public UnsignedInteger(int underlying) { |
| this.underlying = underlying; |
| } |
| |
| @Override |
| public int intValue() { |
| return underlying; |
| } |
| |
| @Override |
| public long longValue() { |
| return Integer.toUnsignedLong(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; |
| } |
| |
| UnsignedInteger that = (UnsignedInteger) o; |
| |
| if (underlying != that.underlying) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Compares the give integer value to this unsigned integer numerically treating the given value as unsigned. |
| * |
| * @param value |
| * the integer to compare to this unsigned integer 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(int value) { |
| return Integer.compareUnsigned(underlying, value); |
| } |
| |
| /** |
| * Compares the give long value to this unsigned integer numerically treating the given value as unsigned. |
| * |
| * @param value |
| * the long to compare to this unsigned integer 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(longValue(), value); |
| } |
| |
| @Override |
| public int compareTo(UnsignedInteger value) { |
| return Long.compareUnsigned(longValue(), value.longValue()); |
| } |
| |
| /** |
| * Compares two integer values numerically treating the values as unsigned. |
| * |
| * @param left |
| * the left hand side integer to compare |
| * @param right |
| * the right hand side integer 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(int left, int right) { |
| return Integer.compareUnsigned(left, right); |
| } |
| |
| /** |
| * Compares two long values numerically treating the values as unsigned. |
| * |
| * @param left |
| * the left hand side long value to compare |
| * @param right |
| * the right hand side long value 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 underlying; |
| } |
| |
| @Override |
| public String toString() { |
| return String.valueOf(longValue()); |
| } |
| |
| /** |
| * Returns an UnsignedInteger instance representing the specified int value. This method always returns |
| * a cached {@link UnsignedInteger} instance for values in the range [0...255] which can save space and time |
| * over calling the constructor {@link UnsignedInteger#UnsignedInteger(int)} which will always create a new |
| * instance of the {@link UnsignedInteger} type. |
| * |
| * @param value |
| * The int value to return as an {@link UnsignedInteger} instance. |
| * |
| * @return an {@link UnsignedInteger} instance representing the unsigned view of the given int. |
| */ |
| public static UnsignedInteger valueOf(int value) { |
| if ((value & 0xFFFFFF00) == 0) { |
| return cachedValues[value]; |
| } else { |
| return new UnsignedInteger(value); |
| } |
| } |
| |
| /** |
| * Adds the value of the given {@link UnsignedInteger} to this instance and return a new {@link UnsignedInteger} |
| * instance that represents the newly computed value. |
| * |
| * @param value |
| * The {@link UnsignedInteger} whose underlying value should be added to this instance's value. |
| * |
| * @return a new immutable {@link UnsignedInteger} resulting from the addition of this with the given value. |
| */ |
| public UnsignedInteger add(final UnsignedInteger value) { |
| int val = underlying + value.underlying; |
| return UnsignedInteger.valueOf(val); |
| } |
| |
| /** |
| * Subtract the value of the given {@link UnsignedInteger} from this instance and return a new {@link UnsignedInteger} |
| * instance that represents the newly computed value. |
| * |
| * @param value |
| * The {@link UnsignedInteger} whose underlying value should be subtracted to this instance's value. |
| * |
| * @return a new immutable {@link UnsignedInteger} resulting from the subtraction the given value from this. |
| */ |
| public UnsignedInteger subtract(final UnsignedInteger value) { |
| int val = underlying - value.underlying; |
| return UnsignedInteger.valueOf(val); |
| } |
| |
| /** |
| * Returns an {@link UnsignedInteger} instance representing the specified {@link String} value. This method |
| * always returns a cached {@link UnsignedInteger} instance for values in the range [0...255] which can save |
| * space and time over calling the constructor {@link UnsignedInteger#UnsignedInteger(int)} which will always |
| * create a new instance of the {@link UnsignedInteger} type. |
| * |
| * @param value |
| * The String value to return as an {@link UnsignedInteger} instance. |
| * |
| * @return an {@link UnsignedInteger} instance representing the unsigned view of the given String. |
| * |
| * @throws NumberFormatException if the given value is greater than the max {@link UnsignedInteger} value possible |
| * or the {@link String} value given cannot be converted to a numeric value. |
| */ |
| public static UnsignedInteger valueOf(final String value) { |
| long longVal = Long.parseLong(value); |
| return valueOf(longVal); |
| } |
| |
| /** |
| * Returns an UnsignedInteger instance representing the specified long value. This method always returns |
| * a cached {@link UnsignedInteger} instance for values in the range [0...255] which can save space and time |
| * over calling the constructor {@link UnsignedInteger#UnsignedInteger(int)} which will always create a new |
| * instance of the {@link UnsignedInteger} type. |
| * |
| * @param value |
| * The long value to return as an {@link UnsignedInteger} instance. |
| * |
| * @return an {@link UnsignedInteger} instance representing the unsigned view of the given long. |
| * |
| * @throws NumberFormatException if the given value is greater than the max {@link UnsignedInteger} value possible. |
| */ |
| public static UnsignedInteger valueOf(final long value) { |
| if (value < 0L || value >= (1L << 32)) { |
| throw new NumberFormatException("Value \"" + value + "\" lies outside the range [" + 0L + "-" + (1L << 32) + ")."); |
| } |
| return valueOf((int) value); |
| } |
| |
| /** |
| * Returns a {@code long} that represents the unsigned view of the given {@code int} value. |
| * |
| * @param value |
| * The integer whose unsigned value should be converted to a long. |
| * |
| * @return a positive long value that represents the given {@code int} as unsigned. |
| */ |
| public static long toUnsignedLong(int value) { |
| return Integer.toUnsignedLong(value); |
| } |
| } |