/*
* (c) Copyright 2011 by Volker Bergmann. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, is permitted under the terms of the
* GNU General Public License (GPL).
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
* REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
* HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.databene.benerator.primitive.number;
import org.databene.commons.ConversionException;
import org.databene.commons.converter.NumberToNumberConverter;
import org.databene.commons.converter.ThreadSafeConverter;
import org.databene.script.math.ArithmeticEngine;
/**
* A quantizer for arbitrary number types.<br/><br/>
* Created: 05.07.2011 08:19:20
* @since 0.7.0
* @author Volker Bergmann
*/
public class NumberQuantizer<E extends Number> extends ThreadSafeConverter<Number, E> {
private E min;
private E granularity;
private Class<E> numberType;
public NumberQuantizer(E min, E granularity, Class<E> numberType) {
super(Number.class, numberType);
this.min = min;
this.granularity = granularity;
this.numberType = numberType;
}
public E convert(Number sourceValue) throws ConversionException {
return quantize(sourceValue, min, granularity, numberType);
}
public static <T extends Number> T quantize(Number sourceValue, T min, T granularity, Class<T> numberType) throws ConversionException {
T value = NumberToNumberConverter.convert(sourceValue, numberType);
ArithmeticEngine engine = ArithmeticEngine.defaultInstance();
long ofs = ((Number) engine.divide(engine.subtract(value, min), granularity)).longValue();
return NumberToNumberConverter.convert((Number) engine.add(min, engine.multiply(ofs, granularity)), numberType);
}
}