changes for new feature

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

@@ -32,6 +32,8 @@ public class Product implements IZUGFeRDExportableProduct {
 	protected boolean isIntraCommunitySupply = false;
 	protected SchemedID globalId = null;
 	protected String countryOfOrigin = null;
+	protected ArrayList<Charge> charges=new ArrayList<>();
+	protected ArrayList<Allowance> allowances=new ArrayList<>();
 	protected HashMap<String, String> attributes = new HashMap<>();
 
 	protected List<IDesignatedProductClassification> classifications = new ArrayList<>();
@@ -393,4 +395,42 @@ public class Product implements IZUGFeRDExportableProduct {
 		this.classifications.add(classification);
 		return this;
 	}
+
+	public Product addCharge(Charge e) {
+		charges.add(e);
+		return this;
+	}
+
+	public Product addAllowance(Allowance a) {
+		allowances.add(a);
+		return this;
+	}
+
+	/***
+	 * returns the AppliedTradeAllowanceCharges of this product which are actually Charges
+	 * @return array of or null, if none
+	 */
+	@Override
+	public Charge[] getCharges() {
+		if (charges.size()==0) {
+			return null;
+		}
+		Charge[] chargeArr = new Charge[charges.size()];
+		return charges.toArray(chargeArr);
+	}
+
+	@Override
+	/***
+	 * returns the AppliedTradeAllowanceCharges of this product which are actually Allowances
+	 * @return array of or null, if none
+	 */
+	public Allowance[] getAllowances() {
+		if (allowances.size()==0) {
+			return null;
+		}
+		Allowance[] allowanceArr = new Allowance[allowances.size()];
+		return allowances.toArray(allowanceArr);
+	}
+
+
 }

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

@@ -43,7 +43,11 @@ public interface IZUGFeRDExportableItem extends IAbsoluteValueProvider{
 	 * item level discounts
 	 * @return array of the discounts on a single item
 	 */
+	@Deprecated
 	default IZUGFeRDAllowanceCharge[] getItemAllowances() {
+		if (getProduct()!=null) {
+			return getProduct().getAllowances();
+		}
 		return null;
 	}
 
@@ -51,10 +55,27 @@ public interface IZUGFeRDExportableItem extends IAbsoluteValueProvider{
 	 * item level price additions
 	 * @return array of the additional charges on the item
 	 */
+	@Deprecated
 	default IZUGFeRDAllowanceCharge[] getItemCharges() {
+		if (getProduct()!=null) {
+			return getProduct().getCharges();
+		}
 		return null;
 	}
 
+	@Deprecated
+	default IZUGFeRDAllowanceCharge[] getAllowances() {
+		return null;
+	}
+
+	/**
+	 * item level price additions
+	 * @return array of the additional charges on the item
+	 */
+	@Deprecated
+	default IZUGFeRDAllowanceCharge[] getCharges() {
+		return null;
+	}
 
 	/***
 	 * BT 132 (issue https://github.com/ZUGFeRD/mustangproject/issues/247)
@@ -147,9 +168,9 @@ public interface IZUGFeRDExportableItem extends IAbsoluteValueProvider{
 	}
 	
 	/***
-	 * specify allowances amount for the line item total
+	 *  get all (allowances and charges) SpecifiedTradeAllowanceCharges
 	 *
-	 * @return the sum of allowances for this item
+	 * @return the real item lecel SpecifiedTradeAllowanceCharges
 	 */
 	default IZUGFeRDAllowanceCharge[] getItemTotalAllowances() {
 		return null;

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

@@ -166,6 +166,25 @@ public interface IZUGFeRDExportableProduct {
 	    return null;
 	}
 
+
+	/**
+	 * product level discounts (AppliedTradeAllowanceCharge, will change net price)
+	 * @return array of the discounts on a single product
+	 */
+	default IZUGFeRDAllowanceCharge[] getAllowances() {
+		return null;
+	}
+
+	/**
+	 * product level charges (AppliedTradeAllowanceCharge, will change net price)
+	 * @return array of the additional charges on the product
+	 */
+	default IZUGFeRDAllowanceCharge[] getCharges() {
+		return null;
+	}
+
+
+
 	/**
 	 * Detailed information about the product
 	 *