Bug 410905 ISODate to DateTime
data/org.eclipse.birt.data.oda.mongodb/src/org/eclipse/birt/data/oda/mongodb/impl/MDbResultSet.java
/* (non-Javadoc)
     * @see org.eclipse.datatools.connectivity.oda.IResultSet#getObject(java.lang.String)
     */
    public Object getObject( String columnName ) throws OdaException
    {
        return getFieldValue( columnName );
    }
    /*
     * @see org.eclipse.datatools.connectivity.oda.IResultSet#wasNull()
     */
    public boolean wasNull() throws OdaException
    {
        return m_wasNull;
    }
    /*
     * @see org.eclipse.datatools.connectivity.oda.IResultSet#findColumn(java.lang.String)
     */
    public int findColumn( String columnName ) throws OdaException
    {
        return m_metadata.getColumnNumber( columnName );
    }
    private String findFieldName( int columnNumber ) throws OdaException
    {
        return getMetaData().getColumnName( columnNumber );
    }
    private Object getFieldValue( String columnName ) throws OdaException
    {
        Object fieldValue = doGetFieldValue( columnName );
        m_wasNull = ( fieldValue == null );
        return fieldValue;