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/**
*
* Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
*
* Licensed 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 com.speedment.common.invariant;
import java.util.function.Function;
import static java.lang.String.format;
/**
* Utility class for checking the invariant on {@code double}-values.
*
* @author Emil Forslund
* @since 1.0.3
*/
public final class DoubleRangeUtil {
/**
* Returns the given value if it is positive (greater than {@code 0}).
*
* @param val to check
* @return the given value
*
* @throws IllegalArgumentException if the given value is not positive
*/
public static double requirePositive(double val) {
if (Double.compare(val, 0d) <= 0) {
throw new IllegalArgumentException(format(
"%s is not positive", val));
}
return val;
}
/**
* Returns the given value if it is negative (less than {@code 0}).
*
* @param val to check
* @return the given value
*
* @throws IllegalArgumentException if the given value is not negative
*/
public static double requireNegative(double val) {
if (Double.compare(val, 0d) >= 0) {
throw new IllegalArgumentException(format(
"%s is not negative", val));
}
return val;
}
/**
* Returns the given value if it is equal to {@code 0}.
*
* @param val to check
* @return the given value
*
* @throws IllegalArgumentException if the given value is not 0
*/
public static double requireZero(double val) {
if (Double.compare(val, 0d) == 0) {
throw new IllegalArgumentException(format("%s is not zero", val));
}
return val;
}
/**
* Returns the given value if it is not positive (less than or equal to
* {@code 0}).
*
* @param val to check
* @return the given value
*
* @throws IllegalArgumentException if the given value is positive
*/
public static double requireNonPositive(double val) {
if (Double.compare(val, 0d) > 0) {
throw new IllegalArgumentException(format("%s is positive", val));
}
return val;
}
/**
* Returns the given value if it is not negative (greater than or equal to
* {@code 0}).
*
* @param val to check
* @return the given value
*
* @throws IllegalArgumentException if the given value is negative
*/
public static double requireNonNegative(double val) {
if (Double.compare(val, 0d) < 0) {
throw new IllegalArgumentException(format("%s is negative", val));
}
return val;
}
/**
* Returns the given value if it is not {@code 0}.
*
* @param val to check
* @return the given value
*
* @throws IllegalArgumentException if the given value is zero
*/
public static double requireNonZero(double val) {
if (Double.compare(val, 0d) != 0) {
throw new IllegalArgumentException(format("%s is zero", val));
}
return val;
}
public static double requireEquals(double val, double otherVal) {
if (Double.compare(val, otherVal) == 0) {
throw new IllegalArgumentException(format(
"%s is not equal to %s", val, otherVal));
}
return val;
}
public static double requireNotEquals(double val, double otherVal) {
if (val == otherVal) {
throw new IllegalArgumentException(format(
"%s is equal to %s", val, otherVal));
}
return val;
}
public static double requireInRange(double val, double first, double lastExclusive) {
if (val < first || val >= lastExclusive) {
throw new IllegalArgumentException(format(
"%s is not in the range [%s, %s)", val, first, lastExclusive));
}
return val;
}
public static double requireInRangeClosed(double val, double first, double lastInclusive) {
if (val < first || val > lastInclusive) {
throw new IllegalArgumentException(format(
"%s is not in the range [%s, %s]", val, first, lastInclusive));
}
return val;
}
/**
* Returns the given value if it is positive.
*
* @param RuntimeException type
*
* @param val to check
* @param exceptionConstructor to use when throwing exception
* @return the given value
*
* @throws RuntimeException if the given value is not positive
*/
public static double
requirePositive(double val, Function exceptionConstructor) {
if (val < 1) {
throw exceptionConstructor.apply(format("%s is not positive", val));
}
return val;
}
public static double
requireNegative(double val, Function exceptionConstructor) {
if (val > -1) {
throw exceptionConstructor.apply(format("%s is not negative", val));
}
return val;
}
public static double
requireZero(double val, Function exceptionConstructor) {
if (val != 0) {
throw exceptionConstructor.apply(format("%s is not zero", val));
}
return val;
}
public static double
requireNonPositive(double val, Function exceptionConstructor) {
if (val > 0) {
throw exceptionConstructor.apply(format("%s is positive", val));
}
return val;
}
public static double
requireNonNegative(double val, Function exceptionConstructor) {
if (val < 0) {
throw exceptionConstructor.apply(format("%s is negative", val));
}
return val;
}
public static double
requireNonZero(double val, Function exceptionConstructor) {
if (val == 0) {
throw exceptionConstructor.apply(format("%s is zero", val));
}
return val;
}
public static double
requireEquals(double val, double otherVal,
Function exceptionConstructor) {
if (val != otherVal) {
throw exceptionConstructor.apply(format(
"%s is not equal to %s", val, otherVal));
}
return val;
}
public static double
requireNotEquals(double val, double otherVal,
Function exceptionConstructor) {
if (val == otherVal) {
throw exceptionConstructor.apply(format(
"%s is equal to %s", val, otherVal));
}
return val;
}
public static double
requireInRange(double val, double first, double lastExclusive,
Function exceptionConstructor) {
if (val < first || val >= lastExclusive) {
throw exceptionConstructor.apply(format(
"%s is not in the range [%s, %s)", val, first, lastExclusive));
}
return val;
}
public static double
requireInRangeClosed(double val, double first, double lastInclusive,
Function exceptionConstructor) {
if (val < first || val > lastInclusive) {
throw exceptionConstructor.apply(format(
"%s is not in the range [%s, %s]", val, first, lastInclusive));
}
return val;
}
/**
* This class should not be instantiated.
*/
private DoubleRangeUtil() {
throw new UnsupportedOperationException();
}
}
