org.apache.xml.utils

Class IntVector

Implemented Interfaces:
Cloneable
Known Direct Subclasses:
IntStack

public class IntVector
extends Object
implements Cloneable

A very simple table that stores a list of int. This version is based on a "realloc" strategy -- a simle array is used, and when more storage is needed, a larger array is obtained and all existing data is recopied into it. As a result, read/write access to existing nodes is O(1) fast but appending may be O(N**2) slow. See also SuballocatedIntVector.

Constructor Summary

IntVector()
Default constructor.
IntVector(int blocksize)
Construct a IntVector, using the given block size.
IntVector(int blocksize, int increaseSize)
Construct a IntVector, using the given block size.
IntVector(IntVector v)
Copy constructor for IntVector

Method Summary

void
addElement(int value)
Append a int onto the vector.
void
addElements(int numberOfElements)
Append several slots onto the vector, but do not set the values.
void
addElements(int value, int numberOfElements)
Append several int values onto the vector.
Object
clone()
Returns clone of current IntVector
boolean
contains(int s)
Tell if the table contains the given node.
int
elementAt(int i)
Get the nth element.
int
indexOf(int elem)
Searches for the first occurence of the given argument, beginning the search at index, and testing for equality using the equals method.
int
indexOf(int elem, int index)
Searches for the first occurence of the given argument, beginning the search at index, and testing for equality using the equals method.
void
insertElementAt(int value, int at)
Inserts the specified node in this vector at the specified index.
int
lastIndexOf(int elem)
Searches for the first occurence of the given argument, beginning the search at index, and testing for equality using the equals method.
void
removeAllElements()
Inserts the specified node in this vector at the specified index.
boolean
removeElement(int s)
Removes the first occurrence of the argument from this vector.
void
removeElementAt(int i)
Deletes the component at the specified index.
void
setElementAt(int value, int index)
Sets the component at the specified index of this vector to be the specified object.
void
setSize(int sz)
Get the length of the list.
int
size()
Get the length of the list.

Constructor Details

IntVector

public IntVector()
Default constructor. Note that the default block size is very small, for small lists.

IntVector

public IntVector(int blocksize)
Construct a IntVector, using the given block size.
Parameters:
blocksize - Size of block to allocate

IntVector

public IntVector(int blocksize,
                 int increaseSize)
Construct a IntVector, using the given block size.
Parameters:
blocksize - Size of block to allocate

IntVector

public IntVector(IntVector v)
Copy constructor for IntVector
Parameters:
v - Existing IntVector to copy

Method Details

addElement

public final void addElement(int value)
Append a int onto the vector.
Parameters:
value - Int to add to the list

addElements

public final void addElements(int numberOfElements)
Append several slots onto the vector, but do not set the values.
Parameters:

addElements

public final void addElements(int value,
                              int numberOfElements)
Append several int values onto the vector.
Parameters:
value - Int to add to the list

clone

public Object clone()
            throws CloneNotSupportedException
Returns clone of current IntVector
Returns:
clone of current IntVector

contains

public final boolean contains(int s)
Tell if the table contains the given node.
Parameters:
s - object to look for
Returns:
true if the object is in the list

elementAt

public final int elementAt(int i)
Get the nth element.
Parameters:
i - index of object to get
Returns:
object at given index

indexOf

public final int indexOf(int elem)
Searches for the first occurence of the given argument, beginning the search at index, and testing for equality using the equals method.
Parameters:
elem - object to look for
Returns:
the index of the first occurrence of the object argument in this vector at position index or later in the vector; returns -1 if the object is not found.

indexOf

public final int indexOf(int elem,
                         int index)
Searches for the first occurence of the given argument, beginning the search at index, and testing for equality using the equals method.
Parameters:
elem - object to look for
index - Index of where to begin search
Returns:
the index of the first occurrence of the object argument in this vector at position index or later in the vector; returns -1 if the object is not found.

insertElementAt

public final void insertElementAt(int value,
                                  int at)
Inserts the specified node in this vector at the specified index. Each component in this vector with an index greater or equal to the specified index is shifted upward to have an index one greater than the value it had previously.
Parameters:
value - Int to insert
at - Index of where to insert

lastIndexOf

public final int lastIndexOf(int elem)
Searches for the first occurence of the given argument, beginning the search at index, and testing for equality using the equals method.
Parameters:
elem - Object to look for
Returns:
the index of the first occurrence of the object argument in this vector at position index or later in the vector; returns -1 if the object is not found.

removeAllElements

public final void removeAllElements()
Inserts the specified node in this vector at the specified index. Each component in this vector with an index greater or equal to the specified index is shifted upward to have an index one greater than the value it had previously.

removeElement

public final boolean removeElement(int s)
Removes the first occurrence of the argument from this vector. If the object is found in this vector, each component in the vector with an index greater or equal to the object's index is shifted downward to have an index one smaller than the value it had previously.
Parameters:
s - Int to remove from array
Returns:
True if the int was removed, false if it was not found

removeElementAt

public final void removeElementAt(int i)
Deletes the component at the specified index. Each component in this vector with an index greater or equal to the specified index is shifted downward to have an index one smaller than the value it had previously.
Parameters:
i - index of where to remove and int

setElementAt

public final void setElementAt(int value,
                               int index)
Sets the component at the specified index of this vector to be the specified object. The previous component at that position is discarded. The index must be a value greater than or equal to 0 and less than the current size of the vector.
Parameters:
index - Index of where to set the object

setSize

public final void setSize(int sz)
Get the length of the list.

size

public final int size()
Get the length of the list.
Returns:
length of the list

Copyright B) 2004 Apache XML Project. All Rights Reserved.