com.helger.masterdata.vat.IVATItem Maven / Gradle / Ivy

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/**
 * Copyright (C) 2014-2017 Philip Helger (www.helger.com)
 * philip[at]helger[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.helger.masterdata.vat;

import java.math.BigDecimal;
import java.util.Locale;

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

import com.helger.commons.annotation.MustImplementEqualsAndHashcode;
import com.helger.commons.equals.EqualsHelper;
import com.helger.commons.id.IHasID;
import com.helger.commons.math.MathHelper;
import com.helger.commons.text.display.IHasDisplayText;
import com.helger.datetime.period.ILocalDatePeriod;

/**
 * Defines a single VAT item valid within a country.
 *
 * @author Philip Helger
 */
@MustImplementEqualsAndHashcode
public interface IVATItem extends IHasDisplayText, IHasID 
{
  /**
   * @return The non-null type of this item.
   */
  @Nonnull
  EVATType getType ();

  /**
   * @return The country for which this VAT item is applicable. May be
   *         null for 0% items only!
   * @since 5.0.6
   */
  @Nullable
  Locale getCountry ();

  /**
   * @return true if a country is present, false
   *         otherwise.
   * @since 5.0.6
   */
  default boolean hasCountry ()
  {
    return getCountry () != null;
  }

  /**
   * @return The percentage of this VAT type. Must be between 0 and 100.
   */
  @Nonnull
  @Nonnegative
  BigDecimal getPercentage ();

  /**
   * Check if this VAT item has the passed percentage.
   *
   * @param aPercentage
   *        The percentage to be checked. May be null.
   * @return true if the passed percentage equals the contained
   *         percentage.
   */
  default boolean hasPercentage (@Nullable final BigDecimal aPercentage)
  {
    return EqualsHelper.equals (getPercentage (), aPercentage);
  }

  /**
   * @return true if the percentage is 0.
   */
  default boolean isZeroPercentage ()
  {
    return MathHelper.isEQ0 (getPercentage ());
  }

  /**
   * @return true if the percentage is > 0.
   */
  default boolean isNonZeroPercentage ()
  {
    return MathHelper.isNE0 (getPercentage ());
  }

  /**
   * @return The factor (e.g. 0.2 for 20% or 0.5 for 50%). Always ≥ 0 (for 0%
   *         VAT) and ≤ 1 (for 100% VAT) (equals
   *         getPercentage() / 100)
   */
  @Nonnull
  @Nonnegative
  BigDecimal getPercentageFactor ();

  /**
   * @return The multiplication factor (e.g. 1.2 for 20% or 1.5 for 50%). Always
   *         ≥ 1 (for 0% VAT) and ≤ 2 (for 100% VAT). It can also be used
   *         to calculate the net from the gross price by calling
   *         gross.divide (factor). The result equals
   *         1 + getPercentageFactor() which in turn is
   *         1 + getPercentage() / 100.
   */
  @Nonnull
  @Nonnegative
  BigDecimal getMultiplicationFactorNetToGross ();

  /**
   * @return true if this item is deprecated and a new VAT item
   *         applies now.
   */
  boolean isDeprecated ();

  /**
   * @return The validity period of this item. May not be null.
   */
  @Nonnull
  ILocalDatePeriod getPeriod ();
}