org.apache.wicket.util.lang.Numbers Maven / Gradle / Ivy
/*
* 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.wicket.util.lang;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @since 1.5.8
*/
public final class Numbers
{
private static final Logger LOG = LoggerFactory.getLogger(Numbers.class);
/**
* Prevent instantiation.
*/
private Numbers()
{
}
/**
* Returns the minimum value for the numberType's type
*
* @param numberType
* the type of the number for which the minimum value will be returned
* @return the minimum value of the numberType or Double if the numberType itself is either
* {@code null} or has no minimum value
*/
public static Number getMinValue(Class numberType)
{
Number result;
if (Integer.class == numberType || int.class == numberType)
{
result = Integer.MIN_VALUE;
}
else if (Long.class == numberType || long.class == numberType)
{
result = Long.MIN_VALUE;
}
else if (Float.class == numberType || float.class == numberType)
{
result = -Float.MAX_VALUE;
}
else if (Double.class == numberType || double.class == numberType)
{
result = -Double.MAX_VALUE;
}
else if (Byte.class == numberType || byte.class == numberType)
{
result = Byte.MIN_VALUE;
}
else if (Short.class == numberType || short.class == numberType)
{
result = Short.MIN_VALUE;
}
else
{ // null of any other Number
LOG.debug("'{}' has no minimum value. Falling back to Double.", numberType);
result = -Double.MAX_VALUE;
}
return result;
}
/**
* Returns the maximum value for the numberType's type
*
* @param numberType
* the type of the number for which the maximum value will be returned
* @return the maximum value of the numberType or {@value Double#MAX_VALUE} if the numberType
* itself is either {@code null} or has no maximum value
*/
public static Number getMaxValue(Class numberType)
{
Number result;
if (Integer.class == numberType || int.class == numberType)
{
result = Integer.MAX_VALUE;
}
else if (Long.class == numberType || long.class == numberType)
{
result = Long.MAX_VALUE;
}
else if (Float.class == numberType || float.class == numberType)
{
result = Float.MAX_VALUE;
}
else if (Double.class == numberType || double.class == numberType)
{
result = Double.MAX_VALUE;
}
else if (Byte.class == numberType || byte.class == numberType)
{
result = Byte.MAX_VALUE;
}
else if (Short.class == numberType || short.class == numberType)
{
result = Short.MAX_VALUE;
}
else
{ // null of any other Number
LOG.debug("'{}' has no maximum value. Falling back to Double.MAX_VALUE.");
result = Double.MAX_VALUE;
}
return result;
}
}