Adding function to calculate discounts.

TODO: Discount won't show as Number without decimal fraction although it is handled as such...

i18n/Babydatenbank-labels_de.properties

@@ -17,6 +17,7 @@ pattern=Muster
 brand=Marke
 condition=Zustand
 size=Gr<EFBFBD><EFBFBD>e
+discountedSellPrice=Preis nach Rabatt
 
 articleCount=Anzahl Artikel
 originalPriceSum=Summe Originalpreise

src/com/yourcompany/babydatenbank/actions/OnChangeArticleConditionAction.java

@@ -0,0 +1,22 @@
+package com.yourcompany.babydatenbank.actions;
+
+import org.openxava.actions.*;
+import org.openxava.jpa.*;
+
+import com.yourcompany.babydatenbank.model.*;
+
+public class OnChangeArticleConditionAction extends OnChangePropertyBaseAction {
+
+	@Override
+	public void execute() throws Exception {
+		try {
+			Condition c = XPersistence.getManager().find(Condition.class, getNewValue().toString());
+			
+			getView().setValue("discount", c.getDefaultDiscount());
+		}
+		catch(NullPointerException e) {
+			getView().setValue("discount", 0);
+		}
+	}
+
+}

src/com/yourcompany/babydatenbank/model/Article.java

@@ -4,17 +4,24 @@ import javax.persistence.*;
 
 import org.hibernate.annotations.GenericGenerator;
 import org.openxava.annotations.*;
-import java.math.BigDecimal;
+
+import com.yourcompany.babydatenbank.actions.*;
+
+import java.math.*;
 import java.time.*;
 
+import javax.validation.constraints.*;
+
 @Entity
 @View(members=
 		"name;" +
 		"photo;"+
 		"#category, pattern;"+
 		"#brand, size;"+ 
-		"buyAndSell[condition;"+
+		"buyAndSell["+ 
-		"#originalPrice, buyPrice, sellPrice;"+
+		"#condition, discount;"+
+		"#originalPrice, discountedSellPrice;"+
+		"buyPrice, sellPrice;"+
 		"#buyDate, sellDate];" +
 		"remarks"
 		)
@@ -57,6 +64,7 @@ public class Article {
 	@NoCreate
 	@NoModify
 	@DescriptionsList(order="${number} ASC")
+	@OnChange(OnChangeArticleConditionAction.class)
 	private Condition condition;
 	
 	@Stereotype("MONEY")
@@ -79,6 +87,11 @@ public class Article {
 	
 	@Stereotype("DATE")
 	private LocalDate sellDate;
+	
+	@Column(length=8)
+	@Digits(integer=3,fraction=0)
+	@Max(value=100)
+	private BigDecimal discount;
 
 	public String getOid() {
 		return oid;
@@ -191,6 +204,25 @@ public class Article {
 	public void setSellDate(LocalDate sellDate) {
 		this.sellDate = sellDate;
 	}
+
+	public BigDecimal getDiscount() {
+		return discount;
+	}
+
+	public void setDiscount(BigDecimal discount) {
+		this.discount = discount;
+	}
+	
+	@Column(length=8)
+	@Stereotype("MONEY")
+	public BigDecimal getDiscountedSellPrice() {
+		try {
+			return getOriginalPrice().multiply(BigDecimal.ONE.subtract(getDiscount().divide(new BigDecimal(100), 2, RoundingMode.HALF_EVEN)));
+		} catch(Exception e) {
+			//Log.error(e);
+			return BigDecimal.ZERO;
+		}
+	}
 	
 	
 }

src/com/yourcompany/babydatenbank/model/Condition.java

@@ -1,6 +1,10 @@
 package com.yourcompany.babydatenbank.model;
 
+import java.math.*;
+
 import javax.persistence.*;
+import javax.validation.constraints.*;
+
 import org.hibernate.annotations.GenericGenerator;
 import org.openxava.annotations.*;
 
@@ -18,6 +22,11 @@ public class Condition {
 	
 	@Column(length=32)
 	private String description;
+	
+	@Column(length=8)
+	@Max(value=100)
+	@Digits(integer=3, fraction=0)
+	private BigDecimal defaultDiscount;
 
 	public String getOid() {
 		return oid;
@@ -42,5 +51,13 @@ public class Condition {
 	public void setNumber(int number) {
 		this.number = number;
 	}
+
+	public BigDecimal getDefaultDiscount() {
+		return defaultDiscount;
+	}
+
+	public void setDefaultDiscount(BigDecimal defaultDiscount) {
+		this.defaultDiscount = defaultDiscount;
+	}
 	
 }