When using Ibatis to retrieve Date type values, on Oracle 10g (some driver versions), the time portion of the value returned from the database is not mapped onto the Java object.

i.e.

In DB: 02-JAN-10 13:30:00
In Java Object after mapping: 02-JAN-10 00:00:00

The Ibatis ResultMapper, snippet, looks like this:

....
<result property="savedDate" column="SAVED_DATE" javaType="java.util.Date" jdbcType="DATE"/>
....

The Solution

1. Implement our old friend the Ibatis TypeHandlerCallback.

package foo.bar;

import java.sql.SQLException;
import java.sql.Timestamp;
import java.util.Date;

import com.ibatis.sqlmap.client.extensions.ParameterSetter;
import com.ibatis.sqlmap.client.extensions.ResultGetter;
import com.ibatis.sqlmap.client.extensions.TypeHandlerCallback;

public class CustomDateHandler implements TypeHandlerCallback {

    public Object getResult(ResultGetter getter) throws SQLException {
        final Object obj = getter.getTimestamp();
        return obj != null ? (Date) obj : null;
    }

    public void setParameter(ParameterSetter setter,Object value) throws SQLException {
        setter.setTimestamp(value != null ? new Timestamp(((Date)value).getTime()) : null);
    }

    public Object valueOf(String datetime) {
        return Timestamp.valueOf(datetime);
    }
}

2. Add Typehandlers and TypeAliases to Ibatis config

<typeAlias alias="OracleDateHandler" type="foo.bar.CustomDateHandler"/>
<typeHandler callback="OracleDateHandler" jdbcType="DATETIME" javaType="date"/>

3. Update resultMap to use new “type”

....
<result property="savedDate" column="SAVED_DATE" javaType="java.util.Date" jdbcType="DATETIME"/>
....

Important Note!

This solution deals with issues caused by certain versions of the Oracle JDBC drivers. I believe that the 11g drivers fix this issue. As ever YMMV…..

You need Ibatis to perform custom processing before parameters are set on a Prepared Statement or after the results are retrieved from the result set. Maybe to convert Y/N to boolean, map results to custom objects etc

Solution

You probably want to look at implementing Ibatis’ TypeHandlerCallBack, the API docs for which are here

Example

In this example I map a “prev” or “next” coming back from the DB (as “direction”) to the Enum described in this post.

Ibatis Config

<parameterMap id="findByCompanyIdParams" class="map">
    <parameter mode="IN" property="companyId" javaType="java.lang.String" jdbcType="VARCHAR"/>
    <parameter mode="IN" property="nextKeyId" javaType="java.lang.String" jdbcType="VARCHAR"/>
    <parameter mode="IN" property="maxOccurs" javaType="java.lang.Integer" jdbcType="NUMBER"/>
    <parameter mode="IN" property="direction" javaType="OBJECT"
        typeHandler="foo.bar.PagingCriteriaDirectionTypeHandlerCallback" jdbcType="VARCHAR"/>
    <parameter mode="OUT" property="outCursor" jdbcType="ORACLECURSOR" javaType="java.sql.ResultSet"/>
</parameterMap>

Java code

package foo.bar;

import java.sql.SQLException;

import com.ibatis.sqlmap.client.extensions.ParameterSetter;
import com.ibatis.sqlmap.client.extensions.ResultGetter;
import com.ibatis.sqlmap.client.extensions.TypeHandlerCallback;
import foo.bar.MyRuntimeException;

public class PagingCriteriaDirectionTypeHandlerCallback implements TypeHandlerCallback{

	public Object getResult(ResultGetter getter) throws SQLException {
		String s = getter.getString();
		if (PagingCriteriaDirection.NEXT.getDescription().equalsIgnoreCase(s)) {
			return PagingCriteriaDirection.NEXT;
		} else if (PagingCriteriaDirection.PREV.getDescription().equalsIgnoreCase(s)) {
			return PagingCriteriaDirection.PREV;
		} else {
			throw new SQLException("Unexpected value " + s + " found where "
					+ PagingCriteriaDirection.PREV.getDescription() + " or " + PagingCriteriaDirection.NEXT.getDescription() + " was expected.");
		}
	}

	public void setParameter(ParameterSetter setter, Object parameter) throws SQLException {
		PagingCriteriaDirection direction = (PagingCriteriaDirection) parameter;

		if (direction.equals(PagingCriteriaDirection.NEXT)) {
			setter.setString(PagingCriteriaDirection.NEXT.getDescription());
		}
		else {
			setter.setString(PagingCriteriaDirection.PREV.getDescription());
		}
	}

	public Object valueOf(String s) {
	    if (PagingCriteriaDirection.NEXT.getDescription().equalsIgnoreCase(s)) {
	        return PagingCriteriaDirection.NEXT;
	    }
	    else if (PagingCriteriaDirection.PREV.getDescription().equalsIgnoreCase(s)) {
	        return PagingCriteriaDirection.PREV;
	    }
	    else {
	    	throw new MyRuntimeException("Unexpected value " + s + " found where "
					+ PagingCriteriaDirection.PREV.getDescription() + " or " + PagingCriteriaDirection.NEXT.getDescription() + " was expected.");
	    }
	}

}