com.phloc.masterdata.price.IPriceGraduation Maven / Gradle / Ivy

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Library with support for certain re-ocurring standard business objects
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/**
 * Copyright (C) 2006-2014 phloc systems
 * http://www.phloc.com
 * office[at]phloc[dot]com
 *
 * 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.
 */
package com.phloc.masterdata.price;

import java.math.BigDecimal;
import java.util.List;

import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import com.phloc.commons.annotations.ReturnsImmutableObject;
import com.phloc.commons.state.EChange;
import com.phloc.commons.state.IClearable;
import com.phloc.masterdata.vat.IVATItem;

/**
 * The writable interface for a single price graduation.
 * 
 * @author Philip Helger
 */
public interface IPriceGraduation extends IReadonlyPriceGraduation, IClearable
{
  @Nullable
  IPriceGraduationItem getSmallestMinimumQuantityItem ();

  @Nullable
  IPriceGraduationItem getLargestMinimumQuantityItem ();

  @Nonnull
  @ReturnsImmutableObject
  List  getAllItems ();

  @Nonnull
  IPrice getSinglePriceOfQuantity (@Nonnegative int nQuantity, @Nonnull IVATItem aVAT);

  @Nonnull
  IPrice getTotalPriceOfQuantity (@Nonnegative int nQuantity, @Nonnull IVATItem aVAT);

  /**
   * Add a new item based on the default currency and VAT type.
   * 
   * @param nMinimumQuantity
   *        The minimum quantity to use. Must be ≥ 1.
   * @param aNetAmount
   *        The net amount of a single piece for the given quantity.
   * @return {@link EChange#CHANGED} if the value changed,
   *         {@link EChange#UNCHANGED} otherwise.
   */
  @Nonnull
  EChange addItem (@Nonnegative int nMinimumQuantity, BigDecimal aNetAmount);

  /**
   * Add a new item. The item should be added to the correct position, based on
   * the minimum quantity, in ascending order.
   * 
   * @param aItem
   *        The price graduation item to use. May not be null.
   * @return {@link EChange#CHANGED} if the value changed,
   *         {@link EChange#UNCHANGED} otherwise.
   * @throws IllegalArgumentException
   *         If another item with the same minimum quantity is already
   *         contained. Use the setter methods of {@link IPriceGraduationItem}
   *         instead.
   */
  @Nonnull
  EChange addItem (@Nonnull IPriceGraduationItem aItem);

  /**
   * Delivers a writable price object based on the net amount of the passed item
   * and the currency and VAT set for the price graduation
   * 
   * @param aItem
   *        the price graduation item for which to retrieve the price
   * @param aVAT
   *        the VAT to be used for the price (depending on the concrete context)
   * @return the resulting {@link IPrice}
   */
  IPrice getPrice (@Nonnull IReadonlyPriceGraduationItem aItem, IVATItem aVAT);
}