oracle.javatools.buffer

Class SafeArrayList

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractList

oracle.javatools.buffer.SafeArrayList

All Implemented Interfaces:

java.lang.Cloneable, java.lang.Iterable, java.util.Collection, java.util.List, java.util.RandomAccess

public final class SafeArrayList
extends java.util.AbstractList
implements java.util.RandomAccess, java.lang.Cloneable

The SafeArrayList is an array List implementation that provides basic thread-safety by implementing a copy-on-write scheme. Because of this, fetching an Iterator or ListIterator would return a snapshot of the list data at the time the iterators were fetched.

Although this class is declared public, it is part of the implementation, and not part of the published API.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	SafeArrayList.SafeListIterator A list iterator implementation based on a static array.

Field Summary

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

Constructors

Constructor and Description
SafeArrayList() Construct an empty list.
SafeArrayList(java.util.Collection c) Construct a list containing the elements of the specified collection in the order that they are returned by the collections iterator.

Method Summary

Modifier and Type	Method and Description
void	add(int index, java.lang.Object element) Inserts the given element at the given position in this list, shifting any element down.
boolean	add(java.lang.Object element) Adds (append) the given element to the end of our list.
boolean	addAll(java.util.Collection c) Adds (appends) all of the elements in the given collection to the end of this list.
boolean	addAll(int index, java.util.Collection c) Inserts all of the elements of the given collection to this list at the specified index.
void	clear() Empties this list.
java.lang.Object	clone() Returns a shallow copy of this list instance.
boolean	contains(java.lang.Object element) Fetch whether the given object is contained in this list.
java.lang.Object	get(int index) Fetch the element at the specified position in this list
int	indexOf(java.lang.Object element) Search for the first occurrence of the given argument, testing for equality using the equals() method.
boolean	isEmpty() Tests if this list is empty.
java.util.Iterator	iterator() Returns an iterator over the elements in this list in proper sequence.
int	lastIndexOf(java.lang.Object element) Search for the last occurrence of the given argument in the list.
java.util.ListIterator	listIterator() Returns a list iterator of the elements in this list in proper sequnce.
java.util.ListIterator	listIterator(int index) Returns a list iterator of the elements in this list in proper sequence, starting at the given index.
java.lang.Object	remove(int index) Removes the element at the specified position in this list.
boolean	remove(java.lang.Object element) Removes a single instance of the specified element from this collection.
boolean	removeAll(java.util.Collection c) This operation is not supported by this list implementation.
protected void	removeRange(int startIndex, int endIndex) Removes from this list all of the elements between the given indexes.
boolean	retainAll(java.util.Collection c) This operation is not supported by this list implementation.
java.lang.Object	set(int index, java.lang.Object element) Replace the element at the specified position in this list with the specified element
int	size() Fetch the number of elements in this list.
java.util.List	subList(int startIndex, int endIndex) This operation is not supported by this list implementation.
java.lang.Object[]	toArray() Return an array containing all of the elements in the list in the same order.
java.lang.Object[]	toArray(java.lang.Object[] array) Return an array containing all of the elements in this list in the same order.
java.lang.String	toString() Fetch a visible representation of this object.

Methods inherited from class java.util.AbstractList

equals, hashCode

Methods inherited from class java.util.AbstractCollection

containsAll

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.List

containsAll, replaceAll, sort, spliterator

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

SafeArrayList

public SafeArrayList()

Construct an empty list.

SafeArrayList

public SafeArrayList(java.util.Collection c)

Construct a list containing the elements of the specified collection in the order that they are returned by the collections iterator.

Method Detail

size

public int size()

Fetch the number of elements in this list.

Specified by:

size in interface java.util.Collection

Specified by:

size in interface java.util.List

Specified by:

size in class java.util.AbstractCollection

Returns:

the number of elements in this list

isEmpty

public boolean isEmpty()

Tests if this list is empty.

Specified by:

isEmpty in interface java.util.Collection

Specified by:

isEmpty in interface java.util.List

Overrides:

isEmpty in class java.util.AbstractCollection

Returns:

true if this list is empty, false otherwise

contains

public boolean contains(java.lang.Object element)

Fetch whether the given object is contained in this list.

Specified by:

contains in interface java.util.Collection

Specified by:

contains in interface java.util.List

Overrides:

contains in class java.util.AbstractCollection

Parameters:

element - the element to check

Returns:

true if the list contains the given element

indexOf

public int indexOf(java.lang.Object element)

Search for the first occurrence of the given argument, testing for equality using the equals() method.

Specified by:

indexOf in interface java.util.List

Overrides:

indexOf in class java.util.AbstractList

Parameters:

element - the element to check

Returns:

the index of the first occurrence of the argument in this list, or -1 if not found

lastIndexOf

public int lastIndexOf(java.lang.Object element)

Search for the last occurrence of the given argument in the list.

Specified by:

lastIndexOf in interface java.util.List

Overrides:

lastIndexOf in class java.util.AbstractList

Parameters:

element - the element to check

Returns:

the index of the last occurrence of the argument in this list, or -1 if not found

clone

public java.lang.Object clone()

Returns a shallow copy of this list instance.

Overrides:

clone in class java.lang.Object

Returns:

a clone of this SafeArrayList instance

toArray

public java.lang.Object[] toArray()

Return an array containing all of the elements in the list in the same order.

Specified by:

toArray in interface java.util.Collection

Specified by:

toArray in interface java.util.List

Overrides:

toArray in class java.util.AbstractCollection

Returns:

an array containing the elements of the list

toArray

public java.lang.Object[] toArray(java.lang.Object[] array)

Return an array containing all of the elements in this list in the same order. Use the same type for the returned array as the specified array.

Specified by:

toArray in interface java.util.Collection

Specified by:

toArray in interface java.util.List

Overrides:

toArray in class java.util.AbstractCollection

Parameters:

array - the array into which to store the elements of the list (if it is big enough)

Returns:

an array containing the elements of this list

get

public java.lang.Object get(int index)

Fetch the element at the specified position in this list

Specified by:

get in interface java.util.List

Specified by:

get in class java.util.AbstractList

Parameters:

index - the index of the element to return

Returns:

the element at the given index

set

public java.lang.Object set(int index,
                            java.lang.Object element)

Replace the element at the specified position in this list with the specified element

Specified by:

set in interface java.util.List

Overrides:

set in class java.util.AbstractList

Parameters:

index - the index of the element to replace

element - the replacement element

Returns:

the element previously stored at the given position

add

public boolean add(java.lang.Object element)

Adds (append) the given element to the end of our list.

Specified by:

add in interface java.util.Collection

Specified by:

add in interface java.util.List

Overrides:

add in class java.util.AbstractList

Parameters:

element - the element to add

Returns:

true always

add

public void add(int index,
                java.lang.Object element)

Inserts the given element at the given position in this list, shifting any element down.

Specified by:

add in interface java.util.List

Overrides:

add in class java.util.AbstractList

Parameters:

index - the index at which to insert the element

element - the element to insert

remove

public boolean remove(java.lang.Object element)

Removes a single instance of the specified element from this collection.

Specified by:

remove in interface java.util.Collection

Specified by:

remove in interface java.util.List

Overrides:

remove in class java.util.AbstractCollection

Parameters:

element - the element to be removed

Returns:

true if the element contained the given element

remove

public java.lang.Object remove(int index)

Removes the element at the specified position in this list. Shifts any element up.

Specified by:

remove in interface java.util.List

Overrides:

remove in class java.util.AbstractList

Parameters:

index - the index of the element to remove

Returns:

the element that was removed

clear

public void clear()

Empties this list.

Specified by:

clear in interface java.util.Collection

Specified by:

clear in interface java.util.List

Overrides:

clear in class java.util.AbstractList

addAll

public boolean addAll(java.util.Collection c)

Adds (appends) all of the elements in the given collection to the end of this list.

Specified by:

addAll in interface java.util.Collection

Specified by:

addAll in interface java.util.List

Overrides:

addAll in class java.util.AbstractCollection

Parameters:

c - the elements to be appended to this list

Returns:

true if the contents of this list changed (collection to be added was not empty)

addAll

public boolean addAll(int index,
                      java.util.Collection c)

Inserts all of the elements of the given collection to this list at the specified index.

Specified by:

addAll in interface java.util.List

Overrides:

addAll in class java.util.AbstractList

Parameters:

index - the location in which to insert the new elements

c - the collection to add to our list

Returns:

true if the contents of this list changed (collection to be added was not empty)

removeAll

public boolean removeAll(java.util.Collection c)

This operation is not supported by this list implementation.

Specified by:

removeAll in interface java.util.Collection

Specified by:

removeAll in interface java.util.List

Overrides:

removeAll in class java.util.AbstractCollection

retainAll

public boolean retainAll(java.util.Collection c)

This operation is not supported by this list implementation.

Specified by:

retainAll in interface java.util.Collection

Specified by:

retainAll in interface java.util.List

Overrides:

retainAll in class java.util.AbstractCollection

removeRange

protected void removeRange(int startIndex,
                           int endIndex)

Removes from this list all of the elements between the given indexes.

Overrides:

removeRange in class java.util.AbstractList

Parameters:

startIndex - the index to start the removal from (inclusive)

endIndex - the index to end the removal at (exclusive)

iterator

public java.util.Iterator iterator()

Returns an iterator over the elements in this list in proper sequence. This iterator does not support removal of elements, and is represents a snapshot of the contents of this list at the time the iterator is fetched.

Specified by:

iterator in interface java.lang.Iterable

Specified by:

iterator in interface java.util.Collection

Specified by:

iterator in interface java.util.List

Overrides:

iterator in class java.util.AbstractList

Returns:

an iterator over the elements in this list

listIterator

public java.util.ListIterator listIterator()

Returns a list iterator of the elements in this list in proper sequnce. This iterator does not support modifying the list, and represents a snapshot of the contents of this list at the time the iterator is fetched.

Specified by:

listIterator in interface java.util.List

Overrides:

listIterator in class java.util.AbstractList

listIterator

public java.util.ListIterator listIterator(int index)

Returns a list iterator of the elements in this list in proper sequence, starting at the given index. This iterator does not support modifying the list, and represents a snapshot of the contents of this list at the time the iterator is fetched.

Specified by:

listIterator in interface java.util.List

Overrides:

listIterator in class java.util.AbstractList

Parameters:

index - the index to start from

Returns:

a list iterator over the elements of this list

subList

public java.util.List subList(int startIndex,
                              int endIndex)

This operation is not supported by this list implementation.

Specified by:

subList in interface java.util.List

Overrides:

subList in class java.util.AbstractList

toString

public java.lang.String toString()

Fetch a visible representation of this object.

Overrides:

toString in class java.util.AbstractCollection