Module com.aoapps.collections.transformers

Package com.aoapps.collections.transformers

Interface Transformer<E,W>

Type Parameters:

E - The wrapper type

W - The wrapped type

All Known Implementing Classes:

AbstractTransformer, FunctionalTransformer, MapEntryTransformer

public interface Transformer<E,W>

Performs type conversions.

Author:

AO Industries, Inc.

Method Summary

Modifier and Type	Method	Description
E	fromWrapped(W w)
static <E> Transformer<E,E>	identity()
Transformer<W,E>	invert()
W	toWrapped(E e)
Transformer<Object,Object>	unbounded()	Gets a transformer that wraps and unwraps only when elements are of the wrapper or wrapped types, respectively.

Method Details

toWrapped

W toWrapped(E e)

fromWrapped

E fromWrapped(W w)

unbounded

Transformer<Object,Object> unbounded()

Gets a transformer that wraps and unwraps only when elements are of the wrapper or wrapped types, respectively. This is useful for legacy APIs that use Object or unbounded generics, such as:

• Collection.contains(java.lang.Object)
• Collection.containsAll(java.util.Collection)
• Map.get(java.lang.Object)

invert

Transformer<W,E> invert()

identity

static <E> Transformer<E,E> identity()