de.grogra.xl.util
Class LongList

java.lang.Object
  de.grogra.xl.util.LongList

All Implemented Interfaces:

LongConsumer, VoidToLongGenerator, java.io.Serializable, java.lang.Cloneable

public class LongList
extends java.lang.Object
implements java.lang.Cloneable, java.io.Serializable, LongConsumer, VoidToLongGenerator

A LongList represents a list of long values. It provides list- and stack-oriented methods for insertion, addition, and removal, of values. The methods are not thread-safe.

Author:

Ole Kniemeyer

See Also:

Serialized Form

Field Summary

long[]	elements The array holding the elements.
int	size The size of this list.

Constructor Summary

LongList()
Constructs a new LongList.

LongList(int capacity)
Constructs a new LongList with a given initial capacity.

LongList(long[] elements)
Constructs a new LongList whose elements are a copy of elements.

Method Summary

void	add(int index, long o) Inserts o at position index to this list.
boolean	add(long o) Adds o as last element to this list.
LongList	addAll(long[] v, int begin, int length) Appends length components of v to this list, starting at index begin.
LongList	addAll(LongList v) Appends all elements of v to this list.
void	addIfNotContained(long o) Adds o as last element to this list if is not yet contained as reported by contains(long).
static void	arraycopy(long[] src, int srcIndex, long[] dest, int destIndex, int length)
int	binarySearch(long value) Searches this list for the specified value using the binary search algorithm.
static int	binarySearch(long[] array, long value)
static int	binarySearch(long[] array, long value, int fromIndex, int toIndex)
void	clear() Removes all of the elements from this list.
static void	clear(long[] array, int index, int length)
java.lang.Object	clone()
void	consume(long value) Receives a value of type long.
boolean	contains(long o) Returns true iff this list contains the given element o.
void	ensureCapacity(int capacity) Ensures a capacity of the internal array of at least capacity.
boolean	equals(java.lang.Object o)
void	evaluateLong(LongConsumer cons) This generator method yields all values to cons.
long	get(int index) Returns the list element at index.
int	hashCode()
int	indexOf(long o) Returns the index of o in this list.
boolean	isEmpty() Returns if this list is empty, i.e., if its size is zero.
int	lastIndexOf(long o) Returns the last index of o in this list.
long	peek(int index) Returns the list element at index as seen from the top, i.e., at absolute position size - index.
long	pop() Removes and returns the object at the top of this list.
LongList	push(long o) Pushes o on top of this list, i.e., as last element.
LongList	push(long o1, long o2) Pushes o1 and o2 on top of this list, i.e., as last elements.
LongList	push(long o1, long o2, long o3) Pushes o1 ... o3 on top of this list, i.e., as last elements.
boolean	remove(long o) Removes the element o.
long	removeAt(int index) Removes the element at position index.
long	set(int index, long o) Sets the element at position index to o.
void	setSize(int size) Sets the size of this list to the given value.
int	size() Returns the size of this list.
long[]	toArray() Returns an array containing the elements of this list.
long[]	toArray(long[] array) Returns an array containing the elements of this list.
java.lang.String	toString()
void	trimToSize() Trims the capacity of this list to be its current size.
void	values(LongConsumer cons) This method is an alias for evaluateLong(de.grogra.xl.lang.LongConsumer).
void	writeTo(java.nio.LongBuffer out)

Methods inherited from class java.lang.Object

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

Field Detail

elements

public transient long[] elements

The array holding the elements. Only the components from 0 to size - 1 are valid. Direct operation on this array has to be designed carefully to avoid inconsistencies.

size

public int size

The size of this list. Direct operation on this field has to be designed carefully to avoid inconsistencies.

Constructor Detail

LongList

public LongList()

Constructs a new LongList.

LongList

public LongList(int capacity)

Constructs a new LongList with a given initial capacity.

Parameters:

capacity - the initial capacity

LongList

public LongList(long[] elements)

Constructs a new LongList whose elements are a copy of elements.

Parameters:

elements - the initial elements of the list

Method Detail

add

public void add(int index,
                long o)

Inserts o at position index to this list. If index is not less than size, the list is enlarged and filled with 0-values before.

Parameters:

index - the insert position

o - the value to insert

add

public boolean add(long o)

Adds o as last element to this list.

Parameters:

o - the value to add

Returns:

true

addAll

public LongList addAll(long[] v,
                       int begin,
                       int length)

Appends length components of v to this list, starting at index begin.

Parameters:

v - the array of elements to add

begin - the array index to begin with

length - the number of elements to add

Returns:

this list

addAll

public LongList addAll(LongList v)

Appends all elements of v to this list.

Parameters:

v - the list of elements to add

Returns:

this list

addIfNotContained

public void addIfNotContained(long o)

Adds o as last element to this list if is not yet contained as reported by contains(long).

Parameters:

o - the value to add

arraycopy

public static void arraycopy(long[] src,
                             int srcIndex,
                             long[] dest,
                             int destIndex,
                             int length)

binarySearch

public int binarySearch(long value)

Searches this list for the specified value using the binary search algorithm. This list has to be sorted in ascending order.

Parameters:

value - the value to be searched for

Returns:

index of the searched value, if it is contained in this list; otherwise, (-(insertion point) - 1). The insertion point is defined as the point at which the value would be inserted into the list: the index of the first element greater than the value, or size(), if all elements in the list are less than the specified value.

binarySearch

public static int binarySearch(long[] array,
                               long value)

binarySearch

public static int binarySearch(long[] array,
                               long value,
                               int fromIndex,
                               int toIndex)

clear

public void clear()

Removes all of the elements from this list. The list will be empty after this call returns.

clear

public static void clear(long[] array,
                         int index,
                         int length)

clone

public java.lang.Object clone()

Overrides:

clone in class java.lang.Object

consume

public void consume(long value)

Description copied from interface: LongConsumer

Receives a value of type long.

Specified by:

consume in interface LongConsumer

contains

public boolean contains(long o)

Returns true iff this list contains the given element o.

Parameters:

o - a value

Returns:

true iff o is contained

ensureCapacity

public void ensureCapacity(int capacity)

Ensures a capacity of the internal array of at least capacity.

Parameters:

capacity - the desired minimum capacity

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

evaluateLong

public void evaluateLong(LongConsumer cons)

This generator method yields all values to cons.

Specified by:

evaluateLong in interface VoidToLongGenerator

Parameters:

cons - the consumer which receives the values

get

public long get(int index)

Returns the list element at index. If index is not less than size, 0 is returned.

Parameters:

index - the position

Returns:

the value at index

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

indexOf

public int indexOf(long o)

Returns the index of o in this list.

Parameters:

o - a value

Returns:

the index of o, or -1 of o is not contained

isEmpty

public final boolean isEmpty()

Returns if this list is empty, i.e., if its size is zero.

Returns:

true iff this list is empty

lastIndexOf

public int lastIndexOf(long o)

Returns the last index of o in this list.

Parameters:

o - a value

Returns:

the index of o, or -1 of o is not contained

peek

public long peek(int index)

Returns the list element at index as seen from the top, i.e., at absolute position size - index. Thus, the topmost element has index 1.

Parameters:

index - the position as seen from the top

Returns:

the value at that position

pop

public long pop()

Removes and returns the object at the top of this list.

Returns:

the removed object from the top of this list

push

public final LongList push(long o)

Pushes o on top of this list, i.e., as last element.

Parameters:

o - the value to push

Returns:

this list

push

public final LongList push(long o1,
                           long o2)

Pushes o1 and o2 on top of this list, i.e., as last elements. The effect is the same as the invocation list.push(o1).push(o2).

Parameters:

o1 - the first value to push

o2 - the second value to push

Returns:

this list

push

public final LongList push(long o1,
                           long o2,
                           long o3)

Pushes o1 ... o3 on top of this list, i.e., as last elements. The effect is the same as the invocation list.push(o1).push(o2).push(o3).

Parameters:

o1 - the first value to push

o2 - the second value to push

o3 - the third value to push

Returns:

this list

remove

public boolean remove(long o)

Removes the element o. The last occurence of o in this list is removed.

Parameters:

o - the element to be removed

Returns:

true iff o was found and removed from the list

removeAt

public long removeAt(int index)

Removes the element at position index.

Parameters:

index - the position of the element to be removed

Returns:

the value of the removed element

set

public long set(int index,
                long o)

Sets the element at position index to o. If index is not less than size, the list is enlarged and filled with 0-values before.

Parameters:

index - the position

o - the new value

Returns:

the old value at index

setSize

public void setSize(int size)

Sets the size of this list to the given value. If the new size is greater than the old size, the new elements are initialized with 0-values.

Parameters:

size - the new size

size

public final int size()

Returns the size of this list.

Returns:

the size

toArray

public long[] toArray()

Returns an array containing the elements of this list.

Returns:

an array copy of this list

toArray

public long[] toArray(long[] array)

Returns an array containing the elements of this list. The type of the returned array is that of the specified array. If this list fits in the specified array, it is returned therein. Otherwise, a new array is allocated whose length is the size of this list's size, the values of this list are copied into the new array, and this array is returned.

If there is room for an additional element in the array, a 0-value is written behind the last copied element.

Parameters:

array - an array to use

Returns:

an array copy of this list

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

trimToSize

public void trimToSize()

Trims the capacity of this list to be its current size.

values

public void values(LongConsumer cons)

This method is an alias for evaluateLong(de.grogra.xl.lang.LongConsumer).

writeTo

public void writeTo(java.nio.LongBuffer out)