org.apache.xml.utils

## Class ObjectVector

- java.lang.Object
- - org.apache.xml.utils.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.

Usage:
  **For internal use only**

### Constructor Summary

Constructors
Constructor and 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

Methods
`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

Overrides:
  `clone` in class `java.lang.Object`
Returns:
  clone of current ObjectVector
Throws:
  `java.lang.CloneNotSupportedException`