org.sat4j.core
Class Vec<T>

java.lang.Object
  org.sat4j.core.Vec<T>

All Implemented Interfaces:

java.io.Serializable, IVec<T>

public final class Vec<T>
extends java.lang.Object
implements IVec<T>

Simple but efficient vector implementation, based on the vector implementation available in MiniSAT. Note that the elements are compared using their references, not using the equals method.

Author:

leberre

See Also:

Serialized Form

Constructor Summary

Vec()
Create a Vector with an initial capacity of 5 elements.

Vec(int size)
Create a Vector with a given capacity.

Vec(int size, T pad)
Construit un vecteur contenant de taille size rempli a l'aide de size pad.

Vec(T[] elts)
Adapter method to translate an array of int into an IVec.

Method Summary

void	clear()
<E> void	copyTo(E[] dest)
void	copyTo(IVec<T> copy) Ces operations devraient se faire en temps constant.
T	delete(int index) Delete the ith element of the vector.
void	ensure(int nsize)
boolean	equals(java.lang.Object obj)
T	get(int index)
void	growTo(int newsize, T pad)
int	hashCode()
void	insertFirst(T elem) Insert an element at the very begining of the vector.
void	insertFirstWithShifting(T elem)
boolean	isEmpty() To know if a vector is empty
java.util.Iterator<T>	iterator()
T	last() return the latest element on the stack.
void	moveTo(int dest, int source) Move elements inside the vector.
void	moveTo(IVec<T> dest) Move the content of the vector into dest.
void	pop() Pop the last element on the stack.
IVec<T>	push(T elem)
void	remove(T elem) Remove an element that belongs to the Vector.
void	set(int index, T elem)
void	shrink(int nofelems) Remove nofelems from the Vector.
void	shrinkTo(int newsize) reduce the Vector to exactly newsize elements
int	size()
void	sort(java.util.Comparator<T> comparator)
void	sortUnique(java.util.Comparator<T> cmp)
T[]	toArray() Allow to access the internal representation of the vector as an array.
java.lang.String	toString()
void	unsafePush(T elem) To push an element in the vector when you know you have space for it.

Methods inherited from class java.lang.Object

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

Constructor Detail

Vec

public Vec()

Create a Vector with an initial capacity of 5 elements.

Vec

public Vec(T[] elts)

Adapter method to translate an array of int into an IVec. The array is used inside the Vec, so the elements may be modified outside the Vec. But it should not take much memory. The size of the created Vec is the length of the array.

Parameters:

elts - a filled array of T.

Vec

public Vec(int size)

Create a Vector with a given capacity.

Parameters:

size - the capacity of the vector.

Vec

public Vec(int size,
           T pad)

Construit un vecteur contenant de taille size rempli a l'aide de size pad.

Parameters:

size - la taille du vecteur

pad - l'objet servant a remplir le vecteur

Method Detail

size

public int size()

Specified by:

size in interface IVec<T>

Returns:

the number of elements contained in the vector

shrink

public void shrink(int nofelems)

Remove nofelems from the Vector. It is assumed that the number of elements to remove is smaller or equals to the current number of elements in the vector

Specified by:

shrink in interface IVec<T>

Parameters:

nofelems - the number of elements to remove.

shrinkTo

public void shrinkTo(int newsize)

reduce the Vector to exactly newsize elements

Specified by:

shrinkTo in interface IVec<T>

Parameters:

newsize - the new size of the vector.

pop

public void pop()

Pop the last element on the stack. It is assumed that the stack is not empty!

Specified by:

pop in interface IVec<T>

growTo

public void growTo(int newsize,
                   T pad)

Specified by:

growTo in interface IVec<T>

ensure

public void ensure(int nsize)

Specified by:

ensure in interface IVec<T>

push

public IVec<T> push(T elem)

Specified by:

push in interface IVec<T>

unsafePush

public void unsafePush(T elem)

Description copied from interface: IVec

To push an element in the vector when you know you have space for it.

Specified by:

unsafePush in interface IVec<T>

insertFirst

public void insertFirst(T elem)

Insert an element at the very begining of the vector. The former first element is appended to the end of the vector in order to have a constant time operation.

Specified by:

insertFirst in interface IVec<T>

Parameters:

elem - the element to put first in the vector.

insertFirstWithShifting

public void insertFirstWithShifting(T elem)

Specified by:

insertFirstWithShifting in interface IVec<T>

clear

public void clear()

Specified by:

clear in interface IVec<T>

last

public T last()

return the latest element on the stack. It is assumed that the stack is not empty!

Specified by:

last in interface IVec<T>

Returns:

the last element on the stack (the one on the top)

get

public T get(int index)

Specified by:

get in interface IVec<T>

set

public void set(int index,
                T elem)

Specified by:

set in interface IVec<T>

remove

public void remove(T elem)

Remove an element that belongs to the Vector. The method will break if the element does not belong to the vector.

Specified by:

remove in interface IVec<T>

Parameters:

elem - an element from the vector.

delete

public T delete(int index)

Delete the ith element of the vector. The latest element of the vector replaces the removed element at the ith indexer.

Specified by:

delete in interface IVec<T>

Parameters:

index - the indexer of the element in the vector

Returns:

the former ith element of the vector that is now removed from the vector

copyTo

public void copyTo(IVec<T> copy)

Ces operations devraient se faire en temps constant. Ce n'est pas le cas ici.

Specified by:

copyTo in interface IVec<T>

Parameters:

copy -

copyTo

public <E> void copyTo(E[] dest)

Specified by:

copyTo in interface IVec<T>

Parameters:

dest -

moveTo

public void moveTo(IVec<T> dest)

Description copied from interface: IVec

Move the content of the vector into dest. Note that the vector become empty. The content of the vector is appended to dest.

Specified by:

moveTo in interface IVec<T>

Parameters:

dest - the vector where top put the content of this vector

moveTo

public void moveTo(int dest,
                   int source)

Description copied from interface: IVec

Move elements inside the vector. The content of the method is equivalent to: vec[dest] = vec[source]

Specified by:

moveTo in interface IVec<T>

Parameters:

dest - the index of the destination

source - the index of the source

toArray

public T[] toArray()

Description copied from interface: IVec

Allow to access the internal representation of the vector as an array. Note that only the content of index 0 to size() should be taken into account. USE WITH CAUTION

Specified by:

toArray in interface IVec<T>

Returns:

the internal representation of the Vector as an array.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

sort

public void sort(java.util.Comparator<T> comparator)

Specified by:

sort in interface IVec<T>

Parameters:

comparator -

sortUnique

public void sortUnique(java.util.Comparator<T> cmp)

Specified by:

sortUnique in interface IVec<T>

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

iterator

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

Specified by:

iterator in interface IVec<T>

isEmpty

public boolean isEmpty()

Description copied from interface: IVec

To know if a vector is empty

Specified by:

isEmpty in interface IVec<T>

Returns:

true iff the vector is empty.