com.mysema.util.MathUtils Maven / Gradle / Ivy
/*
* Copyright 2011, Mysema Ltd
*
* 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.mysema.util;
import java.math.BigDecimal;
import java.math.BigInteger;
/**
* MathUtils provides Math related functionality
*
* @author tiwe
*
*/
public final class MathUtils {
private MathUtils() {}
@SuppressWarnings("unchecked")
public static D sum(D num1, Number num2) {
BigDecimal res = new BigDecimal(num1.toString()).add(new BigDecimal(num2.toString()));
return MathUtils.cast(res, (Class)num1.getClass());
}
@SuppressWarnings("unchecked")
public static D difference(D num1, Number num2) {
BigDecimal res = new BigDecimal(num1.toString()).subtract(new BigDecimal(num2.toString()));
return MathUtils.cast(res, (Class)num1.getClass());
}
public static D cast(Number num, Class type) {
D rv;
if (type.isInstance(num)) {
rv = type.cast(num);
} else if (type.equals(Byte.class)) {
rv = type.cast(num.byteValue());
} else if (type.equals(Double.class)) {
rv = type.cast(num.doubleValue());
} else if (type.equals(Float.class)) {
rv = type.cast(num.floatValue());
} else if (type.equals(Integer.class)) {
rv = type.cast(num.intValue());
} else if (type.equals(Long.class)) {
rv = type.cast(num.longValue());
} else if (type.equals(Short.class)) {
rv = type.cast(num.shortValue());
} else if (type.equals(BigDecimal.class)) {
rv = type.cast(new BigDecimal(num.toString()));
} else if (type.equals(BigInteger.class)) {
if (num instanceof BigDecimal) {
rv = type.cast(((BigDecimal) num).toBigInteger());
} else {
rv = type.cast(new BigInteger(num.toString()));
}
} else {
throw new IllegalArgumentException(String.format("Unsupported target type : %s", type.getSimpleName()));
}
return rv;
}
}