/*
 * (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 java.math.BigDecimal;

import org.databene.commons.ConversionException;
import org.databene.commons.Converter;
import org.databene.commons.converter.ThreadSafeConverter;

/**
 * {@link Converter} that quantizes {@link Number}s by a given 'min' value and 
 * 'granularity' and converts it into a {@link BigDecimal}.<br/><br/>
 * Created: 11.04.2011 17:53:55
 * @since 0.6.6
 * @author Volker Bergmann
 */
public class DecimalQuantizer extends ThreadSafeConverter<Number, BigDecimal> {
	
	private BigDecimal min;
	private BigDecimal granularity;

	public DecimalQuantizer(BigDecimal min, BigDecimal granularity) {
	    super(Number.class, BigDecimal.class);
	    this.min = (min != null ? min : BigDecimal.ZERO);
	    this.granularity = granularity;
    }

	public BigDecimal convert(Number sourceValue) throws ConversionException {
		BigDecimal value = (sourceValue instanceof BigDecimal ? (BigDecimal) sourceValue : new BigDecimal(sourceValue.doubleValue()));
		BigDecimal ofs = value.subtract(min).divideToIntegralValue(granularity);
		return ofs.multiply(granularity).add(min);
    }

}