Package org.apache.commons.dbutils
Interface ColumnHandler<T>
- Type Parameters:
T
- The return type.
- All Known Implementing Classes:
BooleanColumnHandler
,ByteColumnHandler
,DoubleColumnHandler
,FloatColumnHandler
,IntegerColumnHandler
,LongColumnHandler
,ShortColumnHandler
,SQLXMLColumnHandler
,StringColumnHandler
,TimestampColumnHandler
public interface ColumnHandler<T>
Defines how to process columns when constructing a bean from a
ResultSet
. Instances do the work of retrieving data from a ResultSet
.-
Method Summary
-
Method Details
-
apply
Retrieves the current row's column value from aResultSet
and stores it into an instance ofpropType
. This method is only called ifmatch(Class)
returns true.- Parameters:
resultSet
- The source result set. This must be on the correct row.columnIndex
- The position of the column to retrieve, a 1-based index.- Returns:
- The converted value or the original value if something doesn't work out.
- Throws:
SQLException
- if the columnIndex is not valid; if a database access error occurs or this method is called on a closed result set
-
match
Tests whether to handle a column targeted for a value type matchingpropType
.- Parameters:
propType
- The type of the target parameter.- Returns:
- true is this property handler handles this
propType
; false otherwise.
-