E - the type of the elements in the collection
public class TransformedCollection<E> extends AbstractCollectionDecorator<E>
Collection to transform objects that are added.
The add methods are affected by this class. Thus objects must be removed or searched for using their transformed form. For example, if the transformation converts Strings to Integers, you must use the Integer form to remove objects.
This class is Serializable from Commons Collections 3.1.
| Modifier and Type | Field and Description |
|---|---|
protected Transformer |
transformer
The transformer to use
|
| Modifier | Constructor and Description |
|---|---|
protected |
TransformedCollection(Collection
Constructor that wraps (not copies).
|
| Modifier and Type | Method and Description |
|---|---|
boolean |
add(E object)
|
boolean |
addAll(Collection
|
protected Collection |
transform(Collection
Transforms a collection.
|
protected E |
transform(E object)
Transforms an object.
|
static <E> TransformedCollection |
transformedCollection(Collection
Factory method to create a transforming collection that will transform existing contents of the specified collection.
|
static <E> TransformedCollection |
transformingCollection(Collection
Factory method to create a transforming collection.
|
clear, contains, containsAll, decorated, isEmpty, iterator, remove, removeAll, retainAll, setCollection, size, toArray, toArray, toStringclone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitequals, hashCode, parallelStream, removeIf, spliterator, streamprotected final Transformer<? super E ,? extends E> transformer
protected TransformedCollection(Collection<E> coll, Transformer <? super E ,? extends E> transformer)
If there are any elements already in the collection being decorated, they are NOT transformed.
coll - the collection to decorate, must not be null
transformer - the transformer to use for conversion, must not be null
NullPointerException - if collection or transformer is null
public static <E> TransformedCollection<E> transformingCollection(Collection <E> coll, Transformer <? super E ,? extends E> transformer)
If there are any elements already in the collection being decorated, they are NOT transformed. Contrast this with transformedCollection(Collection, Transformer).
E - the type of the elements in the collection
coll - the collection to decorate, must not be null
transformer - the transformer to use for conversion, must not be null
NullPointerException - if collection or transformer is null
public static <E> TransformedCollection<E> transformedCollection(Collection <E> collection, Transformer <? super E ,? extends E> transformer)
If there are any elements already in the collection being decorated, they will be transformed by this method. Contrast this with transformingCollection(Collection, Transformer).
E - the type of the elements in the collection
collection - the collection to decorate, must not be null
transformer - the transformer to use for conversion, must not be null
NullPointerException - if collection or transformer is null
protected E transform(E object)
The transformer itself may throw an exception if necessary.
object - the object to transform
protected Collection<E> transform(Collection <? extends E> coll)
The transformer itself may throw an exception if necessary.
coll - the collection to transform
public boolean add(E object)
public boolean addAll(Collection<? extends E> coll)