E - the type of elements in this bagpublic class TransformedBag<E> extends TransformedCollection<E> implements Bag<E>
Bag 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.
transformer| Modifier | Constructor and Description |
|---|---|
protected |
TransformedBag(Bag<E> bag,
Transformer<? super E,? extends E> transformer)
Constructor that wraps (not copies).
|
| Modifier and Type | Method and Description |
|---|---|
boolean |
add(E object,
int nCopies)
Adds
nCopies copies of the specified object to the Bag. |
boolean |
equals(Object object) |
protected Bag<E> |
getBag()
Gets the decorated bag.
|
int |
getCount(Object object)
Returns the number of occurrences (cardinality) of the given
object currently in the bag.
|
int |
hashCode() |
boolean |
remove(Object object,
int nCopies)
Removes
nCopies copies of the specified object from the Bag. |
static <E> Bag<E> |
transformedBag(Bag<E> bag,
Transformer<? super E,? extends E> transformer)
Factory method to create a transforming bag that will transform
existing contents of the specified bag.
|
static <E> Bag<E> |
transformingBag(Bag<E> bag,
Transformer<? super E,? extends E> transformer)
Factory method to create a transforming bag.
|
Set<E> |
uniqueSet()
Returns a
Set of unique elements in the Bag. |
add, addAll, transform, transform, transformedCollection, transformingCollectionclear, contains, containsAll, decorated, isEmpty, iterator, remove, removeAll, retainAll, setCollection, size, toArray, toArray, toStringclone, finalize, getClass, notify, notifyAll, wait, wait, waitadd, containsAll, iterator, remove, removeAll, retainAll, sizeaddAll, clear, contains, isEmpty, parallelStream, removeIf, spliterator, stream, toArray, toArrayprotected TransformedBag(Bag<E> bag, Transformer<? super E,? extends E> transformer)
If there are any elements already in the bag being decorated, they are NOT transformed.
bag - the bag to decorate, must not be nulltransformer - the transformer to use for conversion, must not be nullNullPointerException - if bag or transformer is nullpublic static <E> Bag<E> transformingBag(Bag<E> bag, Transformer<? super E,? extends E> transformer)
If there are any elements already in the bag being decorated, they
are NOT transformed. Contrast this with transformedBag(Bag, Transformer).
E - the type of the elements in the bagbag - the bag to decorate, must not be nulltransformer - the transformer to use for conversion, must not be nullNullPointerException - if bag or transformer is nullpublic static <E> Bag<E> transformedBag(Bag<E> bag, Transformer<? super E,? extends E> transformer)
If there are any elements already in the bag being decorated, they
will be transformed by this method.
Contrast this with transformingBag(Bag, Transformer).
E - the type of the elements in the bagbag - the bag to decorate, must not be nulltransformer - the transformer to use for conversion, must not be nullNullPointerException - if bag or transformer is nullpublic boolean equals(Object object)
equals in interface Collection<E>equals in class Objectpublic int hashCode()
hashCode in interface Collection<E>hashCode in class Objectpublic int getCount(Object object)
Bagpublic boolean remove(Object object, int nCopies)
BagnCopies copies of the specified object from the Bag.
If the number of copies to remove is greater than the actual number of copies in the Bag, no error is thrown.
public boolean add(E object, int nCopies)
BagnCopies copies of the specified object to the Bag.
If the object is already in the Bag.uniqueSet() then increment its
count as reported by Bag.getCount(Object). Otherwise add it to the
Bag.uniqueSet() and report its count as nCopies.
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