ObjectStack (Xalan-Java 2.7.2)

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

All Implemented Interfaces:

java.lang.Cloneable
```
public class ObjectStack
extends ObjectVector
```
Implement a stack of simple integers. %OPT% This is currently based on ObjectVector, which permits fast acess but pays a heavy recopying penalty if/when its size is increased. If we expect deep stacks, we should consider a version based on ChunkedObjectVector.

Constructor Summary

Constructors
Constructor	Description
`ObjectStack()`	Default constructor.
`ObjectStack(int blocksize)`	Construct a ObjectVector, using the given block size.
`ObjectStack(ObjectStack v)`	Copy constructor for ObjectStack

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.Object`	`clone()`	Returns clone of current ObjectStack
`boolean`	`empty()`	Tests if this stack is empty.
`java.lang.Object`	`peek()`	Looks at the object at the top of this stack without removing it from the stack.
`java.lang.Object`	`peek(int n)`	Looks at the object at the position the stack counting down n items.
`java.lang.Object`	`pop()`	Removes the object at the top of this stack and returns that object as the value of this function.
`java.lang.Object`	`push(java.lang.Object i)`	Pushes an item onto the top of this stack.
`void`	`quickPop(int n)`	Quickly pops a number of items from the stack.
`int`	`search(java.lang.Object o)`	Returns where an object is on this stack.
`void`	`setTop(java.lang.Object val)`	Sets an object at a the top of the statck

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from class org.apache.xml.utils.ObjectVector
addElement, addElements, addElements, contains, elementAt, indexOf, indexOf, insertElementAt, lastIndexOf, removeAllElements, removeElement, removeElementAt, setElementAt, setSize, setToSize, size

- Constructor Detail
  - ObjectStack
```
public ObjectStack()
```
    Default constructor. Note that the default block size is very small, for small lists.
  - ObjectStack
```
public ObjectStack(int blocksize)
```
    Construct a ObjectVector, using the given block size.
    
    Parameters:
    
    blocksize - Size of block to allocate
  - ObjectStack
```
public ObjectStack(ObjectStack v)
```
    Copy constructor for ObjectStack
    
    Parameters:
    
    v - ObjectStack to copy
- Method Detail
  - push
```
public java.lang.Object push(java.lang.Object i)
```
    Pushes an item onto the top of this stack.
    
    Parameters:
    
    i - the int to be pushed onto this stack.
    
    Returns:
    
    the item argument.
  - pop
```
public java.lang.Object pop()
```
    Removes the object at the top of this stack and returns that object as the value of this function.
    
    Returns:
    
    The object at the top of this stack.
  - quickPop
```
public void quickPop(int n)
```
    Quickly pops a number of items from the stack.
  - peek
```
public java.lang.Object peek()
```
    Looks at the object at the top of this stack without removing it from the stack.
    
    Returns:
    
    the object at the top of this stack.
    
    Throws:
    
    java.util.EmptyStackException - if this stack is empty.
  - peek
```
public java.lang.Object peek(int n)
```
    Looks at the object at the position the stack counting down n items.
    
    Parameters:
    
    n - The number of items down, indexed from zero.
    
    Returns:
    
    the object at n items down.
    
    Throws:
    
    java.util.EmptyStackException - if this stack is empty.
  - setTop
```
public void setTop(java.lang.Object val)
```
    Sets an object at a the top of the statck
    
    Parameters:
    
    val - object to set at the top
    
    Throws:
    
    java.util.EmptyStackException - if this stack is empty.
  - empty
```
public boolean empty()
```
    Tests if this stack is empty.
    
    Returns:
    
    true if this stack is empty; false otherwise.
    
    Since:
    
    JDK1.0
  - search
```
public int search(java.lang.Object o)
```
    Returns where an object is on this stack.
    
    Parameters:
    
    o - the desired object.
    
    Returns:
    
    the distance from the top of the stack where the object is] located; the return value -1 indicates that the object is not on the stack.
    
    Since:
    
    JDK1.0
  - clone
```
public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException
```
    Returns clone of current ObjectStack
    
    Overrides:
    
    clone in class ObjectVector
    
    Returns:
    
    clone of current ObjectStack
    
    Throws:
    
    java.lang.CloneNotSupportedException

Class ObjectStack

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from class org.apache.xml.utils.ObjectVector

Constructor Detail

ObjectStack

ObjectStack

ObjectStack

Method Detail

push

pop

quickPop

peek

peek

setTop

empty

search

clone