FIX: Fixed compilation errors.

src/main/java/org/caosdb/server/query/POV.java

@@ -23,7 +23,6 @@
 package org.caosdb.server.query;
 
 import static java.sql.Types.DOUBLE;
-import static java.sql.Types.INTEGER;
 import static java.sql.Types.VARCHAR;
 import static org.caosdb.server.database.DatabaseUtils.bytes2UTF8;
 
@@ -216,8 +215,8 @@ public class POV implements EntityFilterInterface {
     }
     final long t1 = System.currentTimeMillis();
     // Add type-converted substitutes for ints/doubles.
-    final Integer vIntSubst = (this.vDouble != null && this.vDouble % 1 == 0)
-      ? (int) Math.rint(this.vDouble) : null;
+    final Integer vIntSubst =
+        (this.vDouble != null && this.vDouble % 1 == 0) ? (int) Math.rint(this.vDouble) : null;
     final Double vDoubleSubst = (this.vInt != null) ? (double) this.vInt : null;
 
     try {
@@ -507,8 +506,8 @@ public class POV implements EntityFilterInterface {
 
   /** Return the Int value, which may be null. */
   public Integer getVInt() {
-    if (this.vInt != null){
-      return vInt.clone();
+    if (this.vInt != null) {
+      return Integer.valueOf(vInt);
     }
     return null;
   }
@@ -516,17 +515,14 @@ public class POV implements EntityFilterInterface {
   /** Return the Double value, which may be null. */
   public Double getVDouble() {
     if (this.vDouble != null) {
-      return this.vDouble.clone();
+      return Double.valueOf(vDouble);
     }
     return null;
   }
 
   /** Return the Datetime value, which may be null. */
   public DateTimeInterface getVDatetime() {
-    if (this.vDatetime != null) {
-      return DateTimeFactory2.valueOf(this.vDatetime.toDateTimeString());
-    }
-    return null;
+    return this.vDatetime;
   }
 
   public String getAggregate() {