TSK-646: Added equals and hash methods to TimeInterval

lib/taskana-core/src/main/java/pro/taskana/TimeInterval.java

@@ -62,4 +62,42 @@ public class TimeInterval {
         return builder.toString();
     }
 
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((begin == null) ? 0 : begin.hashCode());
+        result = prime * result + ((end == null) ? 0 : end.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        TimeInterval other = (TimeInterval) obj;
+        if (begin == null) {
+            if (other.begin != null) {
+                return false;
+            }
+        } else if (!begin.equals(other.begin)) {
+            return false;
+        }
+        if (end == null) {
+            if (other.end != null) {
+                return false;
+            }
+        } else if (!end.equals(other.end)) {
+            return false;
+        }
+        return true;
+    }
+
 }