working on #463

library/src/main/java/org/mustangproject/Product.java

@@ -13,6 +13,8 @@ import java.util.HashMap;
 public class Product implements IZUGFeRDExportableProduct {
 	protected String unit, name, sellerAssignedID, buyerAssignedID;
 	protected String description="";
+	protected String taxExemptionReason=null;
+	protected String taxCategoryCode=null;
 	protected BigDecimal VATPercent;
 	protected boolean isReverseCharge = false;
 	protected boolean isIntraCommunitySupply = false;
@@ -66,6 +68,44 @@ public class Product implements IZUGFeRDExportableProduct {
 		return this;
 	}
 
+	/***
+	 *
+	 * @return e.g. intra-commnunity supply or small business
+	 */
+	@Override
+	public String getTaxExemptionReason() {
+		return taxExemptionReason;
+	}
+
+	/***
+	 *
+	 * @param taxExemptionReasonText String e.g. Kleinunternehmer gemäß §19 UStG https://github.com/ZUGFeRD/mustangproject/issues/463
+	 * @return
+	 */
+	public Product setTaxExemptionReason(String  taxExemptionReasonText) {
+		taxExemptionReason = taxExemptionReasonText;
+		return this;
+	}
+
+	/***
+	 *
+	 * @return e.g. S (normal tax), Z=zero rated,  E (e.g. small business) or K (intrra community supply)
+	 */
+	@Override
+	public String getTaxCategoryCode() {
+		return taxCategoryCode;
+	}
+
+	/***
+	 *
+	 * @param code e.g. S (normal tax), Z=zero rated,  E (e.g. small business) or K (intrra community supply) see also https://github.com/ZUGFeRD/mustangproject/issues/463
+	 * @return
+	 */
+	public Product setTaxCategoryCode(String  code) {
+		taxCategoryCode = code;
+		return this;
+	}
+
 
 	@Override
 	public String getSellerAssignedID() {

library/src/main/java/org/mustangproject/ZUGFeRD/TransactionCalculator.java

@@ -172,6 +172,10 @@ public class TransactionCalculator implements IAbsoluteValueProvider {
 				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);

library/src/main/java/org/mustangproject/ZUGFeRD/VATAmount.java

@@ -32,6 +32,16 @@ import java.math.RoundingMode;
  */
 public class VATAmount {
 
+
+	protected BigDecimal basis, calculated, applicablePercent;
+
+	protected String categoryCode;
+
+	protected String vatExemptionReasonText;
+
+	protected String dueDateTypeCode;
+
+
 	public VATAmount(BigDecimal basis, BigDecimal calculated, String categoryCode) {
 		super();
 		this.basis = basis;
@@ -48,35 +58,41 @@ public class VATAmount {
 		this.dueDateTypeCode = dueDateTypeCode;
 	}
 
-	BigDecimal basis, calculated, applicablePercent;
-
-	String categoryCode;
-
-	String dueDateTypeCode;
-
 	public BigDecimal getApplicablePercent() {
 		return applicablePercent;
 	}
 
-	public void setApplicablePercent(BigDecimal applicablePercent) {
+	public VATAmount setApplicablePercent(BigDecimal applicablePercent) {
+
 		this.applicablePercent = applicablePercent;
+		return this;
 	}
 
 	public BigDecimal getBasis() {
 		return basis;
 	}
 
-	public void setBasis(BigDecimal basis) {
+	public VATAmount setBasis(BigDecimal basis) {
 		this.basis = basis.setScale(2, RoundingMode.HALF_UP);
-
+		return this;
 	}
 
 	public BigDecimal getCalculated() {
 		return calculated;
 	}
 
-	public void setCalculated(BigDecimal calculated) {
+	public VATAmount setCalculated(BigDecimal calculated) {
 		this.calculated = calculated;
+		return this;
+	}
+
+	public String getVatExemptionReasonText() {
+		return vatExemptionReasonText;
+	}
+
+	public VATAmount setVatExemptionReasonText(String theText) {
+		this.vatExemptionReasonText = theText;
+		return this;
 	}
 
 	/**
@@ -94,24 +110,27 @@ public class VATAmount {
 	 * @deprecated Use {@link #setCategoryCode(String)} instead
 	 */
 	@Deprecated
-	public void setDocumentCode(String documentCode) {
+	public VATAmount setDocumentCode(String documentCode) {
 		this.categoryCode = documentCode;
+		return this;
 	}
 
 	public String getCategoryCode() {
 		return categoryCode;
 	}
 
-	public void setCategoryCode(String categoryCode) {
+	public VATAmount setCategoryCode(String categoryCode) {
 		this.categoryCode = categoryCode;
+		return this;
 	}
 
 	public String getDueDateTypeCode() {
 		return dueDateTypeCode;
 	}
 
-	public void setDueDateTypeCode(String dueDateTypeCode) {
+	public VATAmount setDueDateTypeCode(String dueDateTypeCode) {
 		this.dueDateTypeCode = dueDateTypeCode;
+		return this;
 	}
 
 	public VATAmount add(VATAmount v) {

library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java

@@ -654,12 +654,17 @@ public class ZUGFeRD2PullProvider implements IXMLProvider {
 				final String amountDueDateTypeCode = amount.getDueDateTypeCode();
 				final boolean displayExemptionReason = CATEGORY_CODES_WITH_EXEMPTION_REASON.contains(amountCategoryCode);
 				if (getProfile() != Profiles.getByName("Minimum")) {
+					String exemptionReasonTextXML = "";
+					if ((displayExemptionReason) && (amount.getVatExemptionReasonText() != null)) {
+						exemptionReasonTextXML = "<ram:ExemptionReason>" + XMLTools.encodeXML(amount.getVatExemptionReasonText()) + "</ram:ExemptionReason>";
+
+					}
 
 					xml += "<ram:ApplicableTradeTax>"
 						+ "<ram:CalculatedAmount>" + currencyFormat(amount.getCalculated())
 						+ "</ram:CalculatedAmount>" //currencyID=\"EUR\"
 						+ "<ram:TypeCode>VAT</ram:TypeCode>"
-						+ (displayExemptionReason ? exemptionReason : "")
+						+ exemptionReasonTextXML
 						+ "<ram:BasisAmount>" + currencyFormat(amount.getBasis()) + "</ram:BasisAmount>" // currencyID=\"EUR\"
 						+ "<ram:CategoryCode>" + amountCategoryCode + "</ram:CategoryCode>"
 						+ (amountDueDateTypeCode != null ? "<ram:DueDateTypeCode>" + amountDueDateTypeCode + "</ram:DueDateTypeCode>" : "")

library/src/main/java/org/mustangproject/ZUGFeRD/model/TaxCategoryCodeTypeConstants.java

@@ -30,5 +30,5 @@ public class TaxCategoryCodeTypeConstants {
 	public static final String UNTAXEDSERVICE = "O";
 	public static final String INTRACOMMUNITY = "K";
 	
-	public static Set<String> CATEGORY_CODES_WITH_EXEMPTION_REASON = Stream.of(INTRACOMMUNITY, REVERSECHARGE).collect(Collectors.toSet());
+	public static Set<String> CATEGORY_CODES_WITH_EXEMPTION_REASON = Stream.of(INTRACOMMUNITY, REVERSECHARGE, TAXEXEMPT).collect(Collectors.toSet());
 }

library/src/test/java/org/mustangproject/ZUGFeRD/ZF2PushTest.java

@@ -125,7 +125,7 @@ public class ZF2PushTest extends TestCase {
 		String number = "123";
 		String priceStr = "1.00";
 
-		String senderDescription = "Kein Kleinunternehmer";
+		String senderDescription = "Kleinunternehmer";
 		String taxID = "9990815";
 		BigDecimal price = new BigDecimal(priceStr);
 		try {
@@ -144,7 +144,7 @@ public class ZF2PushTest extends TestCase {
 				.setRecipient(new TradeParty("Franz Müller", "teststr.12", "55232", "Entenhausen", "DE").addVATID("DE4711")
 					.setContact(new Contact("Franz Müller", "01779999999", "franz@mueller.de", "teststr. 12", "55232", "Entenhausen", "DE")))
 				.setNumber(number)
-				.addItem(new Item(new Product("Testprodukt", "", "C62", new BigDecimal(19)), price, new BigDecimal(1.0)))
+				.addItem(new Item(new Product("Testprodukt", "", "C62", new BigDecimal(0)).setTaxExemptionReason("Kleinunternehmer gemäß §19 UStG").setTaxCategoryCode("E"), price, new BigDecimal(1.0)))
 			);
 			String theXML = new String(ze.getProvider().getXML());
 			assertTrue(theXML.contains("<rsm:CrossIndustryInvoice"));
@@ -152,7 +152,7 @@ public class ZF2PushTest extends TestCase {
 		} catch (IOException e) {
 			fail("IOException should not be raised");
 		}
-		ZUGFeRDInvoiceImporter zii = new ZUGFeRDInvoiceImporter(TARGET_PDF);
+		ZUGFeRDInvoiceImporter zii = new ZUGFeRDInvoiceImporter(TARGET_ATTACHMENTSPDF);
 		Invoice i= null;
 		try {
 			i = zii.extractInvoice();
@@ -170,7 +170,7 @@ public class ZF2PushTest extends TestCase {
 		assertTrue(zi.getUTF8().contains(taxID));
 
 		// Reading ZUGFeRD
-		assertEquals("1.19", zi.getAmount());
+		assertEquals("1.00", zi.getAmount());
 		assertEquals(orgname, zi.getHolder());
 		assertEquals(number, zi.getForeignReference());
 		try {