Mega Code Archive
Check if number are in a given range
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/*
* Copyright 2008-2009 the original author or authors.
*
* 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.
*/
import java.math.BigDecimal;
import java.math.BigInteger;
/**
* Check if number are in a given range
*
* @author Cedric Chabanois (cchabanois at gmail.com)
*
*/
public class NumberInRange {
public static final BigInteger BYTE_MIN = BigInteger
.valueOf((long) Byte.MIN_VALUE);
public static final BigInteger BYTE_MAX = BigInteger
.valueOf((long) Byte.MAX_VALUE);
public static final BigInteger SHORT_MIN = BigInteger
.valueOf((long) Short.MIN_VALUE);
public static final BigInteger SHORT_MAX = BigInteger
.valueOf((long) Short.MAX_VALUE);
public static final BigInteger INTEGER_MIN = BigInteger
.valueOf((long) Integer.MIN_VALUE);
public static final BigInteger INTEGER_MAX = BigInteger
.valueOf((long) Integer.MAX_VALUE);
public static final BigInteger LONG_MIN = BigInteger
.valueOf(Long.MIN_VALUE);
public static final BigInteger LONG_MAX = BigInteger
.valueOf(Long.MAX_VALUE);
public static final BigDecimal FLOAT_MAX = new BigDecimal(Float.MAX_VALUE);
public static final BigDecimal FLOAT_MIN = new BigDecimal(-Float.MAX_VALUE);
public static final BigDecimal DOUBLE_MAX = new BigDecimal(Double.MAX_VALUE);
public static final BigDecimal DOUBLE_MIN = new BigDecimal(
-Double.MAX_VALUE);
public static boolean isInByteRange(Number number) {
return isInRange(number, BYTE_MIN, BYTE_MAX);
}
public static boolean isInShortRange(Number number) {
return isInRange(number, SHORT_MIN, SHORT_MAX);
}
public static boolean isInIntegerRange(Number number) {
return isInRange(number, INTEGER_MIN, INTEGER_MAX);
}
public static boolean isInLongRange(Number number) {
return isInRange(number, LONG_MIN, LONG_MAX);
}
public static boolean isInRange(Number number, BigInteger min,
BigInteger max) {
try {
BigInteger bigInteger = null;
if (number instanceof Byte || number instanceof Short
|| number instanceof Integer || number instanceof Long) {
bigInteger = BigInteger.valueOf(number.longValue());
} else if (number instanceof Float || number instanceof Double) {
bigInteger = new BigDecimal(number.doubleValue())
.toBigInteger();
} else if (number instanceof BigInteger) {
bigInteger = (BigInteger) number;
} else if (number instanceof BigDecimal) {
bigInteger = ((BigDecimal) number).toBigInteger();
} else {
// not a standard number
bigInteger = new BigDecimal(number.doubleValue())
.toBigInteger();
}
return max.compareTo(bigInteger) >= 0
&& min.compareTo(bigInteger) <= 0;
} catch (NumberFormatException e) {
return false;
}
}
public static boolean isInRange(Number number, BigDecimal min,
BigDecimal max) {
try {
BigDecimal bigDecimal = null;
if (number instanceof Byte || number instanceof Short
|| number instanceof Integer || number instanceof Long) {
bigDecimal = new BigDecimal(number.longValue());
} else if (number instanceof Float || number instanceof Double) {
bigDecimal = new BigDecimal(number.doubleValue());
} else if (number instanceof BigInteger) {
bigDecimal = new BigDecimal((BigInteger) number);
} else if (number instanceof BigDecimal) {
bigDecimal = (BigDecimal) number;
} else {
bigDecimal = new BigDecimal(number.doubleValue());
}
return max.compareTo(bigDecimal) >= 0
&& min.compareTo(bigDecimal) <= 0;
} catch (NumberFormatException e) {
return false;
}
}
public static boolean isInFloatRange(Number number) {
return isInRange(number, FLOAT_MIN, FLOAT_MAX);
}
public static boolean isInDoubleRange(Number number) {
return isInRange(number, DOUBLE_MIN, DOUBLE_MAX);
}
}
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