ColumnHandler

All Known Implementing Classes:

BooleanColumnHandler, ByteColumnHandler, DoubleColumnHandler, FloatColumnHandler, IntegerColumnHandler, LongColumnHandler, ShortColumnHandler, SQLXMLColumnHandler, StringColumnHandler, TimestampColumnHandler
```
public interface ColumnHandler
```
Interface to define how implementations can interact with column handling when constructing a bean from a ResultSet. ColumnHandlers do the work of retrieving data correctly from the ResultSet.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.lang.Object`	`apply(java.sql.ResultSet rs, int columnIndex)`	Do the work required to retrieve and store a column from `ResultSet` into something of type `propType`.
`boolean`	`match(java.lang.Class<?> propType)`	Test whether this `ColumnHandler` wants to handle a column targeted for a value type matching `propType`.

- Method Detail
  - match
```
boolean match(java.lang.Class<?> propType)
```
    Test whether this ColumnHandler wants to handle a column targeted for a value type matching propType.
    
    Parameters:
    
    propType - The type of the target parameter.
    
    Returns:
    
    true is this property handler can/wants to handle this value; false otherwise.
  - apply
```
java.lang.Object apply(java.sql.ResultSet rs,
                       int columnIndex)
                throws java.sql.SQLException
```
    Do the work required to retrieve and store a column from ResultSet into something of type propType. This method is called only if this handler responded true after a call to match(Class).
    
    Parameters:
    
    rs - The result set to get data from. This should be moved to the correct row already.
    
    columnIndex - The position of the column to retrieve.
    
    Returns:
    
    The converted value or the original value if something doesn't work out.
    
    Throws:
    
    java.sql.SQLException - if the columnIndex is not valid; if a database access error occurs or this method is called on a closed result set