org.fastnate.data.properties

Class MapConverter<K,T>

java.lang.Object

org.fastnate.data.properties.MapConverter<K,T>

Type Parameters:

K - the type of the key

T - the type of the value

All Implemented Interfaces:

Function<String,T>, PropertyConverter<T>

public class MapConverter<K,T>
extends Object
implements PropertyConverter<T>, Function<String,T>

Converts a string from an import file to an object by using an explicit mapping.

Author:

Tobias Liefke

Field Summary

Fields

Modifier and Type	Field and Description
private Function<String,K>	keyConverter Converts the string in the import file to the key in the mapping.
private Map<K,T>	map The mapping from the keys in the import file to the target value.

Constructor Summary

Constructors

Constructor and Description
MapConverter(Map<K,T> map, Function<String,K> keyConverter)

Method Summary

Modifier and Type	Method and Description
T	apply(String value)
T	convert(Class<? extends T> targetType, String value) Converts a value from import file to Java.
static <N extends Number,V> MapConverter<N,V>	create(Map<N,V> map, Class<N> numberClass) Creates a new instance of a MapConverter that uses numbers to lookup the values.
static <V> MapConverter<String,V>	create(Map<String,V> map) Creates a new instance of a MapConverter that uses strings to lookup the values.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.fastnate.data.properties.PropertyConverter

of

Methods inherited from interface java.util.function.Function

andThen, compose, identity

Field Detail

map

private final Map<K,T> map

The mapping from the keys in the import file to the target value.

keyConverter

private final Function<String,K> keyConverter

Converts the string in the import file to the key in the mapping.

Constructor Detail

MapConverter

public MapConverter(Map<K,T> map,
                    Function<String,K> keyConverter)

Method Detail

create

public static <N extends Number,V> MapConverter<N,V> create(Map<N,V> map,
                                                            Class<N> numberClass)

Creates a new instance of a MapConverter that uses numbers to lookup the values.

Parameters:

map - mapping from the number to the values

numberClass - the concrete class of the numbers

Returns:

the created converter

create

public static <V> MapConverter<String,V> create(Map<String,V> map)

Creates a new instance of a MapConverter that uses strings to lookup the values.

Parameters:

map - mapping from the string to the value

Returns:

the created converter

apply

public T apply(String value)

Specified by:

apply in interface Function<String,T>

convert

public T convert(Class<? extends T> targetType,
                 String value)

Description copied from interface: PropertyConverter

Converts a value from import file to Java.

Specified by:

convert in interface PropertyConverter<T>

Parameters:

targetType - the type of the target property

value - the value in the import file

Returns:

the value in Java