com.moandjiezana.uncommons.dbutils

Class MapResultSetHandler<K,V>

java.lang.Object

com.moandjiezana.uncommons.dbutils.MapResultSetHandler<K,V>

Type Parameters:

K - The type of the keys

V - The type of the values

All Implemented Interfaces:

ResultSetHandler<Map<K,V>>

public class MapResultSetHandler<K,V>
extends Object
implements ResultSetHandler<Map<K,V>>

Converts a ResultSet to a Map with one entry per row.

Field Summary

Fields inherited from interface com.moandjiezana.uncommons.dbutils.ResultSetHandler

VOID

Constructor Summary

Constructors

Constructor and Description
MapResultSetHandler(FunctionWithException<ResultSet,K> keyExtractor, RowProcessor<V> rowProcessor)

Method Summary

Modifier and Type	Method and Description
static <U> FunctionWithException<ResultSet,U>	column(String column, Class<U> columnClass) Extracts the key from a single column.
Map<K,V>	handle(ResultSet rs) Turn the ResultSet into an instance of T.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.moandjiezana.uncommons.dbutils.ResultSetHandler

list, map, optional, single

Constructor Detail

MapResultSetHandler

public MapResultSetHandler(FunctionWithException<ResultSet,K> keyExtractor,
                           RowProcessor<V> rowProcessor)

Parameters:

keyExtractor - Creates a Map key for each row

rowProcessor - Creates a Map value for each row

Method Detail

column

public static <U> FunctionWithException<ResultSet,U> column(String column,
                                                            Class<U> columnClass)

Extracts the key from a single column.

Type Parameters:

U - the type of the instance

Parameters:

column - the name of the column to extract the key from

columnClass - the type of the column

Returns:

an instance of U

handle

public Map<K,V> handle(ResultSet rs)
                throws Exception

Description copied from interface: ResultSetHandler

Turn the ResultSet into an instance of T.

Specified by:

handle in interface ResultSetHandler<Map<K,V>>

Parameters:

rs - The ResultSet to handle. It has not been touched before being passed to this method.

Returns:

an empty Map if the ResultSet is empty

Throws:

Exception - if a database access error occurs