E - the type of the elements in the collectionpublic 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<? super E,? extends E> |
transformer
The transformer to use
|
| Modifier | Constructor and Description |
|---|---|
protected |
TransformedCollection(Collection<E> coll,
Transformer<? super E,? extends E> transformer)
Constructor that wraps (not copies).
|
| Modifier and Type | Method and Description |
|---|---|
boolean |
add(E object) |
boolean |
addAll(Collection<? extends E> coll) |
protected Collection<E> |
transform(Collection<? extends E> coll)
Transforms a collection.
|
protected E |
transform(E object)
Transforms an object.
|
static <E> TransformedCollection<E> |
transformedCollection(Collection<E> collection,
Transformer<? super E,? extends E> transformer)
Factory method to create a transforming collection that will transform
existing contents of the specified collection.
|
static <E> TransformedCollection<E> |
transformingCollection(Collection<E> coll,
Transformer<? super E,? extends E> transformer)
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 nulltransformer - the transformer to use for conversion, must not be nullNullPointerException - if collection or transformer is nullpublic 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 collectioncoll - the collection to decorate, must not be nulltransformer - the transformer to use for conversion, must not be nullNullPointerException - if collection or transformer is nullpublic 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 collectioncollection - the collection to decorate, must not be nulltransformer - the transformer to use for conversion, must not be nullNullPointerException - if collection or transformer is nullprotected E transform(E object)
The transformer itself may throw an exception if necessary.
object - the object to transformprotected Collection<E> transform(Collection<? extends E> coll)
The transformer itself may throw an exception if necessary.
coll - the collection to transformpublic boolean add(E object)
add in interface Collection<E>add in class AbstractCollectionDecorator<E>public boolean addAll(Collection<? extends E> coll)
addAll in interface Collection<E>addAll in class AbstractCollectionDecorator<E>Copyright © 2001–2018 The Apache Software Foundation. All rights reserved.