--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/Calculation.java	Wed Jun 15 15:28:54 2011 +0000
@@ -0,0 +1,87 @@
+package de.intevation.flys.artifacts.model;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import java.util.List;
+import java.util.ArrayList;
+
+import java.io.Serializable;
+
+public class Calculation
+implements   Serializable
+{
+    public static class Problem 
+    implements          Serializable
+    {
+        protected Double km;
+        protected String msg;
+
+        public Problem() {
+        }
+
+        public Problem(String msg) {
+            this.msg = msg;
+        }
+
+        public Problem(double km, String msg) {
+            this.km  = km;
+            this.msg = msg;
+        }
+
+        public Element toXML(Document document) {
+            Element problem = document.createElement("problem");
+            if (km != null) {
+                problem.setAttribute("km", String.valueOf(km));
+            }
+            problem.setTextContent(msg);
+            return problem;
+        }
+    } // class Problem
+
+    protected List<Problem> problems;
+
+    public Calculation() {
+    }
+
+    protected List<Problem> checkProblems() {
+        if (problems == null) {
+            problems = new ArrayList<Problem>();
+        }
+        return problems;
+    }
+
+    public void addProblem(String msg) {
+        checkProblems().add(new Problem(msg));
+    }
+
+    public void addProblem(double km, String msg) {
+        checkProblems().add(new Problem(km, msg));
+    }
+
+    public boolean hasProblems() {
+        return problems != null && !problems.isEmpty();
+    }
+
+    public int numProblems() {
+        return problems != null ? problems.size() : 0;
+    }
+
+    public List<Problem> getProblems() {
+        return problems;
+    }
+
+    public void toXML(Document document) {
+
+        Element root = document.createElement("problems");
+
+        if (hasProblems()) {
+            for (Problem problem: problems) {
+                root.appendChild(problem.toXML(document));
+            }
+        }
+
+        document.appendChild(root);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :