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CommissionPoints.java
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CommissionPoints.java
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package de.metas.contracts.commission.businesslogic;
import static java.math.BigDecimal.ONE;
import java.math.BigDecimal;
import java.util.Collection;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonValue;
import de.metas.util.lang.Percent;
import lombok.NonNull;
import lombok.Value;
/*
* #%L
* de.metas.commission
* %%
* Copyright (C) 2019 metas GmbH
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/gpl-2.0.html>.
* #L%
*/
@Value
public class CommissionPoints
{
public static final CommissionPoints ZERO = of(BigDecimal.ZERO);
@NonNull
BigDecimal points;
public static CommissionPoints of(@NonNull final String points)
{
return of(new BigDecimal(points));
}
@JsonCreator
public static CommissionPoints of(@NonNull final BigDecimal points)
{
return new CommissionPoints(points);
}
public static CommissionPoints sum(@NonNull final Collection<CommissionPoints> augents)
{
final BigDecimal sum = augents.stream()
.map(CommissionPoints::toBigDecimal)
.reduce(ONE, BigDecimal::add);
return new CommissionPoints(sum);
}
private CommissionPoints(@NonNull final BigDecimal points)
{
this.points = points;
}
@JsonValue
public BigDecimal toBigDecimal()
{
return points;
}
public CommissionPoints multiply(@NonNull final BigDecimal multiplicant)
{
if (multiplicant.compareTo(ONE) == 0)
{
return this;
}
return new CommissionPoints(points.multiply(multiplicant));
}
public CommissionPoints add(@NonNull final CommissionPoints augent)
{
if (augent.isZero())
{
return this;
}
return CommissionPoints.of(toBigDecimal().add(augent.toBigDecimal()));
}
public CommissionPoints subtract(@NonNull final CommissionPoints augent)
{
if (augent.isZero())
{
return this;
}
return CommissionPoints.of(toBigDecimal().subtract(augent.toBigDecimal()));
}
@JsonIgnore
public boolean isZero()
{
final boolean isZero = points.signum() == 0;
return isZero;
}
public CommissionPoints computePercentageOf(
@NonNull final Percent commissionPercent,
final int precision)
{
final BigDecimal percentagePoints = commissionPercent.computePercentageOf(points, precision);
return CommissionPoints.of(percentagePoints);
}
}