org.eclipse.jgit.util
Class BlockList<T>

java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractList<T>
          org.eclipse.jgit.util.BlockList<T>

Type Parameters:

T - type of list element.

All Implemented Interfaces:

java.lang.Iterable<T>, java.util.Collection<T>, java.util.List<T>

public class BlockList<T>
extends java.util.AbstractList<T>

Random access list that allocates entries in blocks.

Unlike ArrayList, this type does not need to reallocate the internal array in order to expand the capacity of the list. Access to any element is constant time, but requires two array lookups instead of one.

To handle common usages, add(Object) and iterator() use internal code paths to amortize out the second array lookup, making addition and simple iteration closer to one array operation per element processed.

Similar to ArrayList, adding or removing from any position except the end of the list requires O(N) time to copy all elements between the modification point and the end of the list. Applications are strongly encouraged to not use this access pattern with this list implementation.

Field Summary

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

BlockList()
Initialize an empty list.

BlockList(int capacity)
Initialize an empty list with an expected capacity.

Method Summary

void	add(int index, T element)
boolean	add(T element)
void	addAll(BlockList<T> src) Quickly append all elements of another BlockList.
void	addAll(T[] src, int srcIdx, int srcCnt) Quickly append all elements from an array.
void	clear()
T	get(int index)
java.util.Iterator<T>	iterator()
T	remove(int index)
T	set(int index, T element)
int	size()

Methods inherited from class java.util.AbstractList

addAll, equals, hashCode, indexOf, lastIndexOf, listIterator, listIterator, removeRange, subList

Methods inherited from class java.util.AbstractCollection

addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.List

addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray

Constructor Detail

BlockList

public BlockList()

Initialize an empty list.

BlockList

public BlockList(int capacity)

Initialize an empty list with an expected capacity.

Parameters:

capacity - number of elements expected to be in the list.

Method Detail

size

public int size()

Specified by:

size in interface java.util.Collection<T>

Specified by:

size in interface java.util.List<T>

Specified by:

size in class java.util.AbstractCollection<T>

clear

public void clear()

Specified by:

clear in interface java.util.Collection<T>

Specified by:

clear in interface java.util.List<T>

Overrides:

clear in class java.util.AbstractList<T>

get

public T get(int index)

Specified by:

get in interface java.util.List<T>

Specified by:

get in class java.util.AbstractList<T>

set

public T set(int index,
             T element)

Specified by:

set in interface java.util.List<T>

Overrides:

set in class java.util.AbstractList<T>

addAll

public void addAll(BlockList<T> src)

Quickly append all elements of another BlockList.

Parameters:

src - the list to copy elements from.

addAll

public void addAll(T[] src,
                   int srcIdx,
                   int srcCnt)

Quickly append all elements from an array.

Parameters:

src - the source array.

srcIdx - first index to copy.

srcCnt - number of elements to copy.

add

public boolean add(T element)

Specified by:

add in interface java.util.Collection<T>

Specified by:

add in interface java.util.List<T>

Overrides:

add in class java.util.AbstractList<T>

add

public void add(int index,
                T element)

Specified by:

add in interface java.util.List<T>

Overrides:

add in class java.util.AbstractList<T>

remove

public T remove(int index)

Specified by:

remove in interface java.util.List<T>

Overrides:

remove in class java.util.AbstractList<T>

iterator

public java.util.Iterator<T> iterator()

Specified by:

iterator in interface java.lang.Iterable<T>

Specified by:

iterator in interface java.util.Collection<T>

Specified by:

iterator in interface java.util.List<T>

Overrides:

iterator in class java.util.AbstractList<T>