public MetaDataColumnDescriptor(String columnName,int jdbcType,Object defaultValue){
  _columnName=columnName.toUpperCase();
  _jdbcType=jdbcType;
  _defaultValue=defaultValue;
}

public MetaDataColumnDescriptor ( String columnName , int jdbcType , Object defaultValue ) { _columnName = columnName . toUpperCase ( ) ; _jdbcType = jdbcType ; _defaultValue = defaultValue ; }
creates a new descriptor instance .
