100 lines
2.6 KiB
Java
100 lines
2.6 KiB
Java
/*
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* Copyright (C) 2011 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
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* in compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the License
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* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing permissions and limitations
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* under the License.
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*/
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package com.google.common.math;
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import java.math.BigInteger;
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import javax.annotation.Nullable;
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import com.google.common.annotations.GwtCompatible;
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/**
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* A collection of preconditions for math functions.
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*
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* @author Louis Wasserman
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*/
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@GwtCompatible
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final class MathPreconditions {
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static int checkPositive(@Nullable String role, int x) {
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if (x <= 0) {
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throw new IllegalArgumentException(role + " (" + x + ") must be > 0");
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}
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return x;
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}
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static long checkPositive(@Nullable String role, long x) {
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if (x <= 0) {
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throw new IllegalArgumentException(role + " (" + x + ") must be > 0");
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}
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return x;
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}
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static BigInteger checkPositive(@Nullable String role, BigInteger x) {
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if (x.signum() <= 0) {
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throw new IllegalArgumentException(role + " (" + x + ") must be > 0");
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}
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return x;
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}
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static int checkNonNegative(@Nullable String role, int x) {
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if (x < 0) {
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throw new IllegalArgumentException(role + " (" + x + ") must be >= 0");
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}
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return x;
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}
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static long checkNonNegative(@Nullable String role, long x) {
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if (x < 0) {
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throw new IllegalArgumentException(role + " (" + x + ") must be >= 0");
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}
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return x;
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}
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static BigInteger checkNonNegative(@Nullable String role, BigInteger x) {
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if (x.signum() < 0) {
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throw new IllegalArgumentException(role + " (" + x + ") must be >= 0");
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}
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return x;
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}
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static double checkNonNegative(@Nullable String role, double x) {
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if (!(x >= 0)) { // not x < 0, to work with NaN.
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throw new IllegalArgumentException(role + " (" + x + ") must be >= 0");
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}
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return x;
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}
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static void checkRoundingUnnecessary(boolean condition) {
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if (!condition) {
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throw new ArithmeticException("mode was UNNECESSARY, but rounding was necessary");
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}
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}
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static void checkInRange(boolean condition) {
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if (!condition) {
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throw new ArithmeticException("not in range");
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}
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}
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static void checkNoOverflow(boolean condition) {
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if (!condition) {
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throw new ArithmeticException("overflow");
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}
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}
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private MathPreconditions() {
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}
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}
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