org.mustangproject.ZUGFeRD.TransactionCalculator Maven / Gradle / Ivy
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FOSS Java library to read, write and validate european electronic invoices and orders in the UN/CEFACT
Cross Industry Invoice based formats Factur-X/ZUGFeRD, XRechnung and Order-X in your invoice PDFs.
The newest version!
package org.mustangproject.ZUGFeRD;
import static java.math.BigDecimal.ZERO;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.HashMap;
import java.util.stream.Stream;
/***
* The Transactioncalculator e.g. adds the line totals and applies VAT on whole
* invoices
*
* @see LineCalculator
*/
public class TransactionCalculator implements IAbsoluteValueProvider {
protected IExportableTransaction trans;
/***
*
* @param trans the invoice (or IExportableTransaction) to be calculated
*/
public TransactionCalculator(IExportableTransaction trans) {
this.trans = trans;
}
/***
* if something had already been paid in advance, this will get it from the
* transaction
*
* @return prepaid amount
*/
protected BigDecimal getTotalPrepaid() {
if (trans.getTotalPrepaidAmount() == null) {
return BigDecimal.ZERO;
} else {
return trans.getTotalPrepaidAmount().setScale(2, RoundingMode.HALF_UP);
}
}
/***
* the invoice total with VAT, allowances and
* charges, WITHOUT considering prepaid amount
*
* @return the invoice total including taxes
*/
public BigDecimal getGrandTotal() {
BigDecimal basis = getTaxBasis();
return getVATPercentAmountMap().values().stream().map(VATAmount::getCalculated)
.map(p -> p.setScale(2, RoundingMode.HALF_UP)).reduce(BigDecimal.ZERO, BigDecimal::add).add(basis);
}
/***
* returns total of charges for this tax rate
*
* @param percent a specific rate, or null for any rate
* @return the total amount
*/
protected BigDecimal getChargesForPercent(BigDecimal percent) {
IZUGFeRDAllowanceCharge[] charges = trans.getZFCharges();
return sumAllowanceCharge(percent, charges);
}
private BigDecimal sumAllowanceCharge(BigDecimal percent, IZUGFeRDAllowanceCharge[] charges) {
BigDecimal res = BigDecimal.ZERO;
if ((charges != null) && (charges.length > 0)) {
for (IZUGFeRDAllowanceCharge currentCharge : charges) {
if ((percent == null) || (currentCharge.getTaxPercent().compareTo(percent) == 0)) {
res = res.add(currentCharge.getTotalAmount(this));
}
}
}
return res;
}
/***
* returns a (potentially concatenated) string of charge reasons, or "Charges"
* if none are defined
*
* @param percent a specific rate, or null for any rate
* @return the space separated String
*/
protected String getChargeReasonForPercent(BigDecimal percent) {
IZUGFeRDAllowanceCharge[] charges = trans.getZFCharges();
String res = getAllowanceChargeReasonForPercent(percent, charges);
if ("".equals(res)) {
res = "Charges";
}
return res;
}
private String getAllowanceChargeReasonForPercent(BigDecimal percent, IZUGFeRDAllowanceCharge[] charges) {
String res = " ";
if ((charges != null) && (charges.length > 0)) {
for (IZUGFeRDAllowanceCharge currentCharge : charges) {
if ((percent == null) || (currentCharge.getTaxPercent().compareTo(percent) == 0)
&& currentCharge.getReason() != null) {
res += currentCharge.getReason() + " ";
}
}
}
res = res.substring(0, res.length() - 1);
return res;
}
/***
* returns a (potentially concatenated) string of allowance reasons, or
* "Allowances", if none are defined
*
* @param percent a specific rate, or null for any rate
* @return the space separated String
*/
protected String getAllowanceReasonForPercent(BigDecimal percent) {
IZUGFeRDAllowanceCharge[] allowances = trans.getZFAllowances();
String res = getAllowanceChargeReasonForPercent(percent, allowances);
if ("".equals(res)) {
res = "Allowances";
}
return res;
}
/***
* returns total of allowances for this tax rate
*
* @param percent a specific rate, or null for any rate
* @return the total amount
*/
protected BigDecimal getAllowancesForPercent(BigDecimal percent) {
IZUGFeRDAllowanceCharge[] allowances = trans.getZFAllowances();
return sumAllowanceCharge(percent, allowances);
}
/***
* returns the total net value of all items, without document level
* charges/allowances
*
* @return item sum
*/
protected BigDecimal getTotal() {
BigDecimal dec = Stream.of(trans.getZFItems()).map(LineCalculator::new)
.map(LineCalculator::getItemTotalNetAmount).reduce(ZERO, BigDecimal::add);
return dec;
}
/***
* returns the total net value of the invoice, including charges/allowances on
* document level
*
* @return item sum +- charges/allowances
*/
public BigDecimal getTaxBasis() {
return getTotal().add(getChargesForPercent(null).setScale(2, RoundingMode.HALF_UP))
.subtract(getAllowancesForPercent(null).setScale(2, RoundingMode.HALF_UP))
.setScale(2, RoundingMode.HALF_UP);
}
/**
* which taxes have been used with which amounts in this transaction, empty for
* no taxes, or e.g. 19:190 and 7:14 if 1000 Eur were applicable to 19% VAT
* (=190 EUR VAT) and 200 EUR were applicable to 7% (=14 EUR VAT) 190 Eur
*
* @return which taxes have been used with which amounts in this invoice
*/
protected HashMap getVATPercentAmountMap() {
HashMap hm = new HashMap<>();
final String vatDueDateTypeCode = trans.getVATDueDateTypeCode();
for (IZUGFeRDExportableItem currentItem : trans.getZFItems()) {
BigDecimal percent = null;
if (currentItem.getProduct()!=null)
{
percent=currentItem.getProduct().getVATPercent();
}
if (percent != null) {
LineCalculator lc = new LineCalculator(currentItem);
VATAmount itemVATAmount = new VATAmount(lc.getItemTotalNetAmount(), lc.getItemTotalVATAmount(),
currentItem.getProduct().getTaxCategoryCode(), vatDueDateTypeCode);
String reasonText = currentItem.getProduct().getTaxExemptionReason();
if (reasonText != null) {
itemVATAmount.setVatExemptionReasonText(reasonText);
}
VATAmount current = hm.get(percent.stripTrailingZeros());
if (current == null) {
hm.put(percent.stripTrailingZeros(), itemVATAmount);
} else {
hm.put(percent.stripTrailingZeros(), current.add(itemVATAmount));
}
}
}
IZUGFeRDAllowanceCharge[] charges = trans.getZFCharges();
if ((charges != null) && (charges.length > 0)) {
for (IZUGFeRDAllowanceCharge currentCharge : charges) {
BigDecimal taxPercent = currentCharge.getTaxPercent();
if (taxPercent != null) {
VATAmount theAmount = hm.get(taxPercent.stripTrailingZeros());
if (theAmount == null) {
theAmount = new VATAmount(BigDecimal.ZERO, BigDecimal.ZERO,
currentCharge.getCategoryCode() != null ? currentCharge.getCategoryCode() : "S",
vatDueDateTypeCode);
}
theAmount.setBasis(theAmount.getBasis().add(currentCharge.getTotalAmount(this)));
BigDecimal factor = taxPercent.divide(new BigDecimal(100));
theAmount.setCalculated(theAmount.getBasis().multiply(factor));
hm.put(taxPercent.stripTrailingZeros(), theAmount);
}
}
}
IZUGFeRDAllowanceCharge[] allowances = trans.getZFAllowances();
if ((allowances != null) && (allowances.length > 0)) {
for (IZUGFeRDAllowanceCharge currentAllowance : allowances) {
BigDecimal taxPercent = currentAllowance.getTaxPercent();
if (taxPercent != null) {
VATAmount theAmount = hm.get(taxPercent.stripTrailingZeros());
if (theAmount == null) {
theAmount = new VATAmount(BigDecimal.ZERO, BigDecimal.ZERO,
currentAllowance.getCategoryCode() != null ? currentAllowance.getCategoryCode() : "S",
vatDueDateTypeCode);
}
theAmount.setBasis(theAmount.getBasis().subtract(currentAllowance.getTotalAmount(this)));
BigDecimal factor = taxPercent.divide(new BigDecimal(100));
theAmount.setCalculated(theAmount.getBasis().multiply(factor));
hm.put(taxPercent.stripTrailingZeros(), theAmount);
}
}
}
return hm;
}
@Override
public BigDecimal getValue() {
return getTotal();
}
public BigDecimal getChargeTotal() {
return getChargesForPercent(null).setScale(2, RoundingMode.HALF_UP);
}
public BigDecimal getAllowanceTotal() {
return getAllowancesForPercent(null).setScale(2, RoundingMode.HALF_UP);
}
public BigDecimal getDuePayable() {
BigDecimal res = getGrandTotal().subtract(getTotalPrepaid());
if (trans.getRoundingAmount() != null) {
res = res.add(trans.getRoundingAmount());
}
return res;
}
}
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