public class XIndexedList<E> extends XCollection<E> implements List<E>, RandomAccess
This class represents a random access collection with real-time behavior (smooth capacity increase).
This class has the following advantages over the widely used
java.util.ArrayList:
shared. Iterations over the XIndexedList values are faster when
performed using the get(int) method rather than using collection
records or iterators:[code]
for (int i = 0, n = list.size(); i < n; i++) {
list.get(i);
}[/code]
This class was based on collections code from http://javolution.org, but modified for use outside of realtime jvms.
XCollection.Record| Constructor and Description |
|---|
XIndexedList()
Creates a list of small initial capacity.
|
XIndexedList(Collection<? extends E> values)
Creates a list containing the specified values, in the order they
are returned by the collection's iterator.
|
XIndexedList(int capacity)
Creates a list of specified initial capacity; unless the list size
reaches the specified capacity, operations on this list will not
allocate memory (no lazy object creation).
|
| Modifier and Type | Method and Description |
|---|---|
boolean |
add(E value)
Appends the specified value to the end of this list.
|
void |
add(int index,
E value)
Inserts the specified value at the specified position in this list.
|
boolean |
addAll(int index,
Collection<? extends E> values)
Inserts all of the values in the specified collection into this
list at the specified position.
|
void |
addLast(E value)
Appends the specified value to the end of this list (fast).
|
void |
clear()
Removes all of the values from this collection (optional operation).
|
boolean |
contains(Object value)
Indicates if this collection contains the specified value.
|
void |
delete(XCollection.Record record)
Deletes the specified record from this collection.
|
E |
get(int index)
Returns the element at the specified index.
|
E |
getFirst()
Returns the first value of this list.
|
E |
getLast()
Returns the last value of this list.
|
XCollection.Record |
head()
Returns the head record of this collection; it is the record such as
head().getNext() holds the first collection value. |
int |
indexOf(Object value)
Returns the index in this list of the first occurrence of the specified
value, or -1 if this list does not contain this value.
|
XIterator<E> |
iterator()
Returns an iterator over the elements in this list
|
int |
lastIndexOf(Object value)
Returns the index in this list of the last occurrence of the specified
value, or -1 if this list does not contain this value.
|
ListIterator<E> |
listIterator()
Returns a list iterator over the elements in this list
|
ListIterator<E> |
listIterator(int index)
Returns a list iterator from the specified position
|
static <E> XIndexedList<E> |
newInstance()
Returns a new, preallocated or recycled
XIndexedList instance |
E |
remove(int index)
Removes the value at the specified position from this list.
|
E |
removeLast()
Removes and returns the last value of this list (fast).
|
void |
removeRange(int fromIndex,
int toIndex)
Removes the values between
[fromIndex..toIndex[ |
void |
reset() |
E |
set(int index,
E value)
Replaces the value at the specified position in this list with the
specified value.
|
void |
setSize(int size)
Sets the size of this list.
|
int |
size()
Returns the number of values in this collection.
|
void |
sort(Comparator<? super E> comparator) |
List<E> |
subList(int fromIndex,
int toIndex)
Returns a view of the portion of this list between the specified
If the specified indexes are equal, the returned list is empty.
|
XCollection.Record |
tail()
Returns the tail record of this collection; it is the record such as
tail().getPrevious() holds the last collection value. |
void |
trimToSize()
Reduces the capacity of this list to the current size (minimize
storage space).
|
List<E> |
unmodifiable()
Returns the unmodifiable view associated to this collection.
|
E |
valueOf(XCollection.Record record)
Returns the collection value for the specified record.
|
addAll, containsAll, copyTo, equals, hashCode, isEmpty, remove, removeAll, retainAll, reusableIterator, shared, supportsIteratorModifications, toArray, toArray, toStringaddAll, containsAll, equals, hashCode, isEmpty, remove, removeAll, replaceAll, retainAll, spliterator, toArray, toArrayparallelStream, removeIf, streampublic XIndexedList()
public XIndexedList(int capacity)
capacity - the initial capacity.public XIndexedList(Collection<? extends E> values)
values - the values to be placed into this list.public static <E> XIndexedList<E> newInstance()
XIndexedList instanceXIndexedList instance.public void setSize(int size)
null elements are added; otherwise
the last elements are removed until the desired size is reached.size - the new size.public final E get(int index)
get in interface List<E>index - index of value to return.IndexOutOfBoundsException - if (index < 0) ||
(index >= size())public final E set(int index, E value)
set in interface List<E>index - index of value to replace.value - value to be stored at the specified position.IndexOutOfBoundsException - if (index < 0) ||
(index >= size())public final boolean add(E value)
add in interface Collection<E>add in interface List<E>add in class XCollection<E>value - the value to be appended to this list.true (as per the general contract of the
Collection.add method).public final E getFirst()
NoSuchElementException - if this list is empty.public final E getLast()
NoSuchElementException - if this list is empty.public final void addLast(E value)
value - the value to be added.public final E removeLast()
NoSuchElementException - if this list is empty.public final void clear()
XCollectionclear in interface Collection<E>clear in interface List<E>clear in class XCollection<E>public void reset()
public final boolean addAll(int index,
Collection<? extends E> values)
Note: If this method is used concurrent access must be synchronized (the list is no more thread-safe).
addAll in interface List<E>index - the index at which to insert first value from the specified
collection.values - the values to be inserted into this list.true if this list changed as a result of the call;
false otherwise.IndexOutOfBoundsException - if (index < 0) ||
(index > size())public final void add(int index,
E value)
Note: If this method is used concurrent access must be synchronized (the list is no more thread-safe).
add in interface List<E>index - the index at which the specified value is to be inserted.value - the value to be inserted.IndexOutOfBoundsException - if (index < 0) ||
(index > size())public final E remove(int index)
Note: If this method is used concurrent access must be synchronized (the list is no more thread-safe).
remove in interface List<E>index - the index of the value to removed.IndexOutOfBoundsException - if (index < 0) ||
(index >= size())public final void removeRange(int fromIndex,
int toIndex)
[fromIndex..toIndex[ from
this list.
Note: If this method is used concurrent access must be synchronized
(the list is no more thread-safe).
fromIndex - the beginning index, inclusive.toIndex - the ending index, exclusive.IndexOutOfBoundsException - if (fromIndex < 0) || (toIndex < 0)
|| (fromIndex > toIndex) || (toIndex > this.size())public final int indexOf(Object value)
public final int lastIndexOf(Object value)
lastIndexOf in interface List<E>value - the value to search for.public ListIterator<E> listIterator()
listIterator in interface List<E>public ListIterator<E> listIterator(int index)
listIterator in interface List<E>index - the index of first value to be returned from the
list iterator (by a call to the next method).IndexOutOfBoundsException - if the index is out of range
[code](index < 0 || index > size())[/code]public final List<E> subList(int fromIndex, int toIndex)
indexOf and
lastIndexOf, and all of the algorithms in the
Collections class can be applied to a subList.
The semantics of the list returned by this method become undefined if
the backing list (i.e., this list) is structurally modified in
any way other than via the returned list (structural modifications are
those that change the size of this list, or otherwise perturb it in such
a fashion that iterations in progress may yield incorrect results).subList in interface List<E>fromIndex - low endpoint (inclusive) of the subList.toIndex - high endpoint (exclusive) of the subList.IndexOutOfBoundsException - if [code](fromIndex < 0 ||
toIndex > size || fromIndex > toIndex)[/code]public final void trimToSize()
public void sort(Comparator<? super E> comparator)
public final int size()
XCollectionsize in interface Collection<E>size in interface List<E>size in class XCollection<E>public final XCollection.Record head()
XCollectionhead().getNext() holds the first collection value.head in class XCollection<E>public final XCollection.Record tail()
XCollectiontail().getPrevious() holds the last collection value.tail in class XCollection<E>public final E valueOf(XCollection.Record record)
XCollectionvalueOf in class XCollection<E>record - the record whose current value is returned.public final void delete(XCollection.Record record)
XCollectionImplementation must ensure that removing a record from the collection does not affect in any way the records preceding the record being removed (it might affect the next records though, e.g. in a list collection, the indices of the subsequent records will change).
delete in class XCollection<E>record - the record to be removed.public List<E> unmodifiable()
XCollectionUnsupportedOperationException being thrown.unmodifiable in class XCollection<E>public final boolean contains(Object value)
XCollectioncontains in interface Collection<E>contains in interface List<E>contains in class XCollection<E>value - the value whose presence in this collection
is to be tested.true if this collection contains the specified
value;false otherwise.Copyright © 2019 N5 Technologies, Inc. All Rights Reserved.