Class ObjectVector

  • All Implemented Interfaces:
    java.lang.Cloneable
    Direct Known Subclasses:
    ObjectStack

    public class ObjectVector
    extends java.lang.Object
    implements java.lang.Cloneable
    A very simple table that stores a list of objects. 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.
    • Constructor Summary

      Constructors 
      Constructor Description
      ObjectVector()
      Default constructor.
      ObjectVector​(int blocksize)
      Construct a IntVector, using the given block size.
      ObjectVector​(int blocksize, int increaseSize)
      Construct a IntVector, using the given block size.
      ObjectVector​(ObjectVector v)
      Copy constructor for ObjectVector
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void addElement​(java.lang.Object value)
      Append an object onto the vector.
      void addElements​(int numberOfElements)
      Append several slots onto the vector, but do not set the values.
      void addElements​(java.lang.Object value, int numberOfElements)
      Append several Object values onto the vector.
      java.lang.Object clone()
      Returns clone of current ObjectVector
      boolean contains​(java.lang.Object s)
      Tell if the table contains the given Object.
      java.lang.Object elementAt​(int i)
      Get the nth element.
      int indexOf​(java.lang.Object 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​(java.lang.Object 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​(java.lang.Object value, int at)
      Inserts the specified object in this vector at the specified index.
      int lastIndexOf​(java.lang.Object 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()
      Remove all elements objects from the list.
      boolean removeElement​(java.lang.Object s)
      Removes the first occurrence of the argument from this vector.
      void removeElementAt​(int i)
      Deletes the component at the specified index.
      void setElementAt​(java.lang.Object 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.
      void setToSize​(int size)  
      int size()
      Get the length of the list.
      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • ObjectVector

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

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

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

        public ObjectVector​(ObjectVector v)
        Copy constructor for ObjectVector
        Parameters:
        v - Existing ObjectVector to copy
    • Method Detail

      • size

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

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

        public final void addElement​(java.lang.Object value)
        Append an object onto the vector.
        Parameters:
        value - Object to add to the list
      • addElements

        public final void addElements​(java.lang.Object value,
                                      int numberOfElements)
        Append several Object values onto the vector.
        Parameters:
        value - Object 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:
        numberOfElements - number of slots to append
      • insertElementAt

        public final void insertElementAt​(java.lang.Object value,
                                          int at)
        Inserts the specified object 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 - Object to insert
        at - Index of where to insert
      • removeAllElements

        public final void removeAllElements()
        Remove all elements objects from the list.
      • removeElement

        public final boolean removeElement​(java.lang.Object 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 - Object to remove from array
        Returns:
        True if the object 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 an object
      • setElementAt

        public final void setElementAt​(java.lang.Object 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:
        value - object to set
        index - Index of where to set the object
      • elementAt

        public final java.lang.Object elementAt​(int i)
        Get the nth element.
        Parameters:
        i - index of object to get
        Returns:
        object at given index
      • contains

        public final boolean contains​(java.lang.Object s)
        Tell if the table contains the given Object.
        Parameters:
        s - object to look for
        Returns:
        true if the object is in the list
      • indexOf

        public final int indexOf​(java.lang.Object 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.
      • indexOf

        public final int indexOf​(java.lang.Object 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.
      • lastIndexOf

        public final int lastIndexOf​(java.lang.Object 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.
      • setToSize

        public final void setToSize​(int size)
      • clone

        public java.lang.Object clone()
                               throws java.lang.CloneNotSupportedException
        Returns clone of current ObjectVector
        Returns:
        clone of current ObjectVector
        Throws:
        java.lang.CloneNotSupportedException