Package weka.core

Class FastVector

java.lang.Object
weka.core.FastVector
All Implemented Interfaces:
Serializable, Copyable, RevisionHandler
Direct Known Subclasses:
BestFirst.LinkedList2, LFSMethods.LinkedList2
public class FastVector extends Object implements Copyable, Serializable, RevisionHandler
Implements a fast vector class without synchronized methods. Replaces java.util.Vector. (Synchronized methods tend to be slow.)
Version:
$Revision: 1.16 $
Author:
Eibe Frank (eibe@cs.waikato.ac.nz)
See Also:

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    class 
    FastVector.FastVectorEnumeration
    Class for enumerating the vector's elements.

  • Constructor Summary

    Constructors
    Constructor
    Description
    FastVector()
    Constructs an empty vector with initial capacity zero.
    FastVector(int capacity)
    Constructs a vector with the given capacity.

  • Method Summary

    Modifier and Type
    Method
    Description
    final void
    addElement(Object element)
    Adds an element to this vector.
    final void
    appendElements(FastVector toAppend)
    Appends all elements of the supplied vector to this vector.
    final int
    capacity()
    Returns the capacity of the vector.
    boolean
    contains(Object o)
    added by akibriya
    final Object
    copy()
    Produces a shallow copy of this vector.
    final Object
    copyElements()
    Clones the vector and shallow copies all its elements.
    final Object
    elementAt(int index)
    Returns the element at the given position.
    final Enumeration
    elements()
    Returns an enumeration of this vector.
    final Enumeration
    elements(int index)
    Returns an enumeration of this vector, skipping the element with the given index.
    final Object
    firstElement()
    Returns the first element of the vector.
    String
    getRevision()
    Returns the revision string.
    final int
    indexOf(Object element)
    Searches for the first occurence of the given argument, testing for equality using the equals method.
    final void
    insertElementAt(Object element, int index)
    Inserts an element at the given position.
    final Object
    lastElement()
    Returns the last element of the vector.
    final void
    removeAllElements()
    Removes all components from this vector and sets its size to zero.
    final void
    removeElementAt(int index)
    Deletes an element from this vector.
    final void
    setCapacity(int capacity)
    Sets the vector's capacity to the given value.
    final void
    setElementAt(Object element, int index)
    Sets the element at the given index.
    final int
    size()
    Returns the vector's current size.
    final void
    swap(int first, int second)
    Swaps two elements in the vector.
    final Object[]
    toArray()
    Returns all the elements of this vector as an array
    final void
    trimToSize()
    Sets the vector's capacity to its size.

    Methods inherited from class java.lang.Object

    equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • FastVector

      public FastVector()
      Constructs an empty vector with initial capacity zero.

    • FastVector

      public FastVector(int capacity)
      Constructs a vector with the given capacity.
      Parameters:
      capacity - the vector's initial capacity

  • Method Details

    • addElement

      public final void addElement(Object element)
      Adds an element to this vector. Increases its capacity if its not large enough.
      Parameters:
      element - the element to add

    • capacity

      public final int capacity()
      Returns the capacity of the vector.
      Returns:
      the capacity of the vector

    • copy

      public final Object copy()
      Produces a shallow copy of this vector.
      Specified by:
      copy in interface Copyable
      Returns:
      the new vector

    • copyElements

      public final Object copyElements()
      Clones the vector and shallow copies all its elements. The elements have to implement the Copyable interface.
      Returns:
      the new vector

    • elementAt

      public final Object elementAt(int index)
      Returns the element at the given position.
      Parameters:
      index - the element's index
      Returns:
      the element with the given index

    • elements

      public final Enumeration elements()
      Returns an enumeration of this vector.
      Returns:
      an enumeration of this vector

    • elements

      public final Enumeration elements(int index)
      Returns an enumeration of this vector, skipping the element with the given index.
      Parameters:
      index - the element to skip
      Returns:
      an enumeration of this vector

    • contains

      public boolean contains(Object o)
      added by akibriya

    • firstElement

      public final Object firstElement()
      Returns the first element of the vector.
      Returns:
      the first element of the vector

    • indexOf

      public final int indexOf(Object element)
      Searches for the first occurence of the given argument, testing for equality using the equals method.
      Parameters:
      element - the element to be found
      Returns:
      the index of the first occurrence of the argument in this vector; returns -1 if the object is not found

    • insertElementAt

      public final void insertElementAt(Object element, int index)
      Inserts an element at the given position.
      Parameters:
      element - the element to be inserted
      index - the element's index

    • lastElement

      public final Object lastElement()
      Returns the last element of the vector.
      Returns:
      the last element of the vector

    • removeElementAt

      public final void removeElementAt(int index)
      Deletes an element from this vector.
      Parameters:
      index - the index of the element to be deleted

    • removeAllElements

      public final void removeAllElements()
      Removes all components from this vector and sets its size to zero.

    • appendElements

      public final void appendElements(FastVector toAppend)
      Appends all elements of the supplied vector to this vector.
      Parameters:
      toAppend - the FastVector containing elements to append.

    • toArray

      public final Object[] toArray()
      Returns all the elements of this vector as an array
      Returns:
      an array containing all the elements of this vector

    • setCapacity

      public final void setCapacity(int capacity)
      Sets the vector's capacity to the given value.
      Parameters:
      capacity - the new capacity

    • setElementAt

      public final void setElementAt(Object element, int index)
      Sets the element at the given index.
      Parameters:
      element - the element to be put into the vector
      index - the index at which the element is to be placed

    • size

      public final int size()
      Returns the vector's current size.
      Returns:
      the vector's current size

    • swap

      public final void swap(int first, int second)
      Swaps two elements in the vector.
      Parameters:
      first - index of the first element
      second - index of the second element

    • trimToSize

      public final void trimToSize()
      Sets the vector's capacity to its size.

    • getRevision

      public String getRevision()
      Returns the revision string.
      Specified by:
      getRevision in interface RevisionHandler
      Returns:
      the revision