Mapping a date field in an JPA entity @DateBridge

MarcusDidiusFalco · **Joined:** Sat Feb 16, 2008 3:09 pm **Posts:** 24

Hello,
I have diffucilties searching for a java.util.Date

using Hibernate Search 5.3.0 and Hibernate 4.3.6

Code:

@Entity
public abstract class Gesamtentscheidung extends WIBASObjekt

   @DateBridge(resolution = Resolution.DAY)
   @Temporal(TemporalType.DATE)
   protected Date datum;

When search for this field I get

Code:

   org.hibernate.search.bridge.BridgeException: Exception while calling bridge#objectToString
   class: de.bwl.uis.module.wasserrecht.entity.Grundentscheidung
   path: datum
   ......
Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Date
   at org.hibernate.search.bridge.builtin.NumericEncodingDateBridge.objectToString(NumericEncodingDateBridge.java:74)
   at org.hibernate.search.bridge.util.impl.ContextualExceptionBridgeHelper$TwoWayConversionContextImpl.objectToString(ContextualExceptionBridgeHelper.java:133)
   ... 34 more

??? Why is there a cast from String to Date?

I have tried to implement my own bridge

Code:

public class DateBridge implements StringBridge {

   @Override
   public String objectToString(Object obj) {
      if (!(obj instanceof Date)) {
         throw new IllegalArgumentException(obj.getClass().getName() + " is not java.util.Date");
      }
      Date date = (Date) obj;
      Calendar calendar = Calendar.getInstance();
      calendar.setTime(date);
      String day = "" + calendar.get(Calendar.DAY_OF_MONTH);
      if (day.length() == 1) {
         day = "0" + day;
      }
      int m = calendar.get(Calendar.MONTH) + 1;
      String month = "" + m;
      if (month.length() == 1) {
         month = "0" + month;
      }
      String year = "" + calendar.get(Calendar.YEAR);
      String dateString = day + "." + month + "." + year;
      return dateString;
   }

}

I have debugged the search. The objectToString() method is called two times.
The first time with a Date, as expected, a second time with a String representing the Date.

What is my mistake?

Gunnar · **Joined:** Sat Jan 24, 2009 12:46 pm **Posts:** 388

Hi,

Your usage looks good to me. Can you share the complete stack trace, as ContextualExceptionBridgeHelper is part of the snippet you showed I believe that another exception is the actual cause.

Thanks,

--Gunnar