public class IntBigArrayBigList extends AbstractIntBigList implements RandomAccess, Cloneable, Serializable
This class implements a lightweight, fast, open, optimized,
reuse-oriented version of big-array-based big lists. Instances of this class
represent a big list with a big array that is enlarged as needed when new entries
are created (by doubling the current length), but is
never made smaller (even on a clear()). A family of
trimming methods lets you control the size of the
backing big array; this is particularly useful if you reuse instances of this class.
Range checks are equivalent to those of java.util's classes, but
they are delayed as much as possible. The backing big array is exposed by the
elements() method.
This class implements the bulk methods removeElements(),
addElements() and getElements() using
high-performance system calls (e.g., System.arraycopy() instead of
expensive loops.
ArrayList,
Serialized FormAbstractIntBigList.IntSubList| Modifier and Type | Field and Description |
|---|---|
static int |
DEFAULT_INITIAL_CAPACITY
The initial default capacity of a big-array big list.
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| Constructor and Description |
|---|
IntBigArrayBigList()
Creates a new big-array big list with
DEFAULT_INITIAL_CAPACITY capacity. |
IntBigArrayBigList(int[][] a)
Creates a new big-array big list and fills it with the elements of a given big array.
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IntBigArrayBigList(int[][] a,
long offset,
long length)
Creates a new big-array big list and fills it with the elements of a given big array.
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IntBigArrayBigList(IntBigList l)
Creates a new big-array big list and fills it with a given type-specific list.
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IntBigArrayBigList(IntCollection c)
Creates a new big-array big list and fills it with a given type-specific collection.
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IntBigArrayBigList(IntIterator i)
Creates a new big-array big list and fills it with the elements returned by a type-specific iterator..
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IntBigArrayBigList(Iterator<? extends Integer> i)
Creates a new big-array big list and fills it with the elements returned by an iterator..
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IntBigArrayBigList(long capacity)
Creates a new big-array big list with given capacity.
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| Modifier and Type | Method and Description |
|---|---|
boolean |
add(int k)
Ensures that this collection contains the specified element (optional operation).
|
void |
add(long index,
int k)
Inserts the specified element at the specified position in this type-specific big list (optional operation).
|
void |
addElements(long index,
int[][] a,
long offset,
long length)
Adds elements to this type-specific list using optimized system calls.
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void |
clear()
This implementation delegates to
AbstractIntBigList.removeElements(long, long). |
IntBigArrayBigList |
clone() |
int |
compareTo(IntBigArrayBigList l)
Compares this big list to another big list.
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int[][] |
elements()
Returns the backing big array of this big list.
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void |
ensureCapacity(long capacity)
Ensures that this big-array big list can contain the given number of entries without resizing.
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boolean |
equals(IntBigArrayBigList l)
Compares this type-specific big-array list to another one.
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void |
getElements(long from,
int[][] a,
long offset,
long length)
Copies element of this type-specific list into the given big array using optimized system calls.
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int |
getInt(long index)
Returns the element at the specified position.
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long |
indexOf(int k)
Returns the index of the first occurrence of the specified element in this type-specific big list, or -1 if this big list does not contain the element.
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boolean |
isEmpty()
Checks whether the stack is empty.
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long |
lastIndexOf(int k)
Returns the index of the last occurrence of the specified element in this type-specific big list, or -1 if this big list does not contain the element.
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IntBigListIterator |
listIterator(long index)
Returns a type-specific list iterator on this type-specific big list starting at a given index.
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boolean |
rem(int k)
Removes a single instance of the specified element from this collection, if it is present (optional operation).
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boolean |
removeAll(Collection<?> c) |
boolean |
removeAll(IntCollection c)
Remove from this collection all elements in the given type-specific collection.
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void |
removeElements(long from,
long to)
Removes elements of this type-specific list using optimized system calls.
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int |
removeInt(long index)
Removes the element at the specified position.
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int |
set(long index,
int k)
Replaces the element at the specified position in this big list with the specified element (optional operation).
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void |
size(long size)
Sets the size of this big list.
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long |
size64()
Returns the size of this data structure as a long.
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void |
trim()
Trims this big-array big list so that the capacity is equal to the size.
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void |
trim(long n)
Trims the backing big array if it is too large.
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static IntBigArrayBigList |
wrap(int[][] a)
Wraps a given big array into a big-array big list.
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static IntBigArrayBigList |
wrap(int[][] a,
long length)
Wraps a given big array into a big-array list of given size.
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add, addAll, addAll, addAll, addAll, addAll, addAll, addElements, compareTo, contains, equals, get, hashCode, indexOf, iterator, lastIndexOf, listIterator, peek, peekInt, pop, popInt, push, push, remove, set, size, subList, top, topInt, toStringadd, contains, containsAll, remove, retainAll, toArray, toIntArray, toIntArraycontainsAll, retainAll, toArray, toArrayadd, contains, containsAll, remove, removeIf, removeIf, retainAll, toArray, toIntArray, toIntArraycontainsAll, parallelStream, retainAll, spliterator, stream, toArray, toArrayforEach, forEachpublic static final int DEFAULT_INITIAL_CAPACITY
public IntBigArrayBigList(long capacity)
capacity - the initial capacity of the array list (may be 0).public IntBigArrayBigList()
DEFAULT_INITIAL_CAPACITY capacity.public IntBigArrayBigList(IntCollection c)
c - a type-specific collection that will be used to fill the array list.public IntBigArrayBigList(IntBigList l)
l - a type-specific list that will be used to fill the array list.public IntBigArrayBigList(int[][] a)
Note that this constructor makes it easy to build big lists from literal arrays
declared as type[][] {{ init_values }}.
The only constraint is that the number of initialisation values is
below BigArrays.SEGMENT_SIZE.
a - a big array whose elements will be used to fill the array list.public IntBigArrayBigList(int[][] a,
long offset,
long length)
Note that this constructor makes it easy to build big lists from literal arrays
declared as type[][] {{ init_values }}.
The only constraint is that the number of initialisation values is
below BigArrays.SEGMENT_SIZE.
a - a big array whose elements will be used to fill the array list.offset - the first element to use.length - the number of elements to use.public IntBigArrayBigList(Iterator<? extends Integer> i)
i - an iterator whose returned elements will fill the array list.public IntBigArrayBigList(IntIterator i)
i - a type-specific iterator whose returned elements will fill the array list.public int[][] elements()
public static IntBigArrayBigList wrap(int[][] a, long length)
a - a big array to wrap.length - the length of the resulting big-array list.public static IntBigArrayBigList wrap(int[][] a)
a - a big array to wrap.public void ensureCapacity(long capacity)
capacity - the new minimum capacity for this big-array big list.public void add(long index,
int k)
AbstractIntBigListThis implementation always throws an UnsupportedOperationException.
add in interface IntBigListadd in class AbstractIntBigListBigList.add(long,Object)public boolean add(int k)
AbstractIntBigListThis implementation always throws an UnsupportedOperationException.
This implementation delegates to the type-specific version of BigList.add(long, Object).
add in interface IntCollectionadd in class AbstractIntBigListCollection.add(Object)public int getInt(long index)
IntBigListgetInt in interface IntBigListBigList.get(long)public long indexOf(int k)
IntBigListindexOf in interface IntBigListindexOf in class AbstractIntBigListBigList.indexOf(Object)public long lastIndexOf(int k)
IntBigListlastIndexOf in interface IntBigListlastIndexOf in class AbstractIntBigListBigList.lastIndexOf(Object)public int removeInt(long index)
AbstractIntBigListThis implementation always throws an UnsupportedOperationException.
removeInt in interface IntBigListremoveInt in class AbstractIntBigListBigList.remove(long)public boolean rem(int k)
AbstractIntBigListThis implementation delegates to indexOf().
rem in interface IntCollectionrem in class AbstractIntBigListCollection.remove(Object)public int set(long index,
int k)
AbstractIntBigListThis implementation always throws an UnsupportedOperationException.
set in interface IntBigListset in class AbstractIntBigListBigList.set(long,Object)public boolean removeAll(IntCollection c)
IntCollectionremoveAll in interface IntCollectionremoveAll in class AbstractIntCollectionc - a type-specific collection.true if this collection changed as a result of the call.Collection.removeAll(Collection)public boolean removeAll(Collection<?> c)
removeAll in interface Collection<Integer>removeAll in class AbstractCollection<Integer>public void clear()
AbstractIntBigListThis implementation delegates to AbstractIntBigList.removeElements(long, long).
clear in interface Collection<Integer>clear in class AbstractIntBigListpublic long size64()
Size64public void size(long size)
BigListIf the specified size is smaller than the current size, the last elements are
discarded. Otherwise, they are filled with 0/null/false.
size in interface BigList<Integer>size in class AbstractIntBigListsize - the new size.public boolean isEmpty()
StackisEmpty in interface Stack<Integer>isEmpty in interface Collection<Integer>isEmpty in class AbstractCollection<Integer>public void trim()
ArrayList.trimToSize()public void trim(long n)
n, this method does nothing. Otherwise, it trims the
big-array length to the maximum between n and size64().
This method is useful when reusing big lists. Clearing a big list leaves the big-array length untouched. If you are reusing a big list many times, you can call this method with a typical size to avoid keeping around a very large big array just because of a few large transient big lists.
n - the threshold for the trimming.public void getElements(long from,
int[][] a,
long offset,
long length)
getElements in interface IntBigListgetElements in class AbstractIntBigListfrom - the start index (inclusive).a - the destination big array.offset - the offset into the destination array where to store the first element copied.length - the number of elements to be copied.public void removeElements(long from,
long to)
removeElements in interface IntBigListremoveElements in class AbstractIntBigListfrom - the start index (inclusive).to - the end index (exclusive).public void addElements(long index,
int[][] a,
long offset,
long length)
addElements in interface IntBigListaddElements in class AbstractIntBigListindex - the index at which to add elements.a - the big array containing the elements.offset - the offset of the first element to add.length - the number of elements to add.public IntBigListIterator listIterator(long index)
AbstractIntBigListNote that this specification strengthens the one given in BigList.listIterator(long).
This implementation is based on the random-access methods.
listIterator in interface BigList<Integer>listIterator in interface IntBigListlistIterator in class AbstractIntBigListindex - index of first element to be returned from the big-list iterator.BigList.listIterator(long)public IntBigArrayBigList clone()
public boolean equals(IntBigArrayBigList l)
This method exists only for sake of efficiency. The implementation inherited from the abstract implementation would already work.
l - a type-specific big-array list.public int compareTo(IntBigArrayBigList l)
This method exists only for sake of efficiency. The implementation inherited from the abstract implementation would already work.
l - a big list.