## org.apache.xml.utils
Class BoolStack

    java.lang.Object
      |
      +--org.apache.xml.utils.BoolStack

public final class BoolStack
extends java.lang.Object
implements java.lang.Cloneable

Simple stack for boolean values.

Usage:
  **For internal use only**

Constructor Summary
`BoolStack()` Default constructor.
`BoolStack(int size)` Construct a IntVector, using the given block size.

Method Summary
`void` `clear()` Clears the stack.
`java.lang.Object` `clone()`
`boolean` `isEmpty()` Tests if this stack is empty.
`boolean` `peek()` Looks at the object at the top of this stack without removing it from the stack.
`boolean` `peekOrFalse()` Looks at the object at the top of this stack without removing it from the stack.
`boolean` `peekOrTrue()` Looks at the object at the top of this stack without removing it from the stack.
`boolean` `pop()` Removes the object at the top of this stack and returns that object as the value of this function.
`boolean` `popAndTop()` Removes the object at the top of this stack and returns the next object at the top as the value of this function.
`boolean` `push(boolean val)` Pushes an item onto the top of this stack.
`void` `setTop(boolean b)` Set the item at the top of this stack
`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

### BoolStack

    public BoolStack()

  Default constructor. Note that the default block size is very small, for small lists.

### BoolStack

    public BoolStack(int size)

  Construct a IntVector, using the given block size.
  Parameters:
    `size` - array size to allocate

Method Detail

### size

    public final int size()

  Get the length of the list.
  Returns:
    Current length of the list

### clear

    public final void clear()

  Clears the stack.

### push

    public final boolean push(boolean val)

  Pushes an item onto the top of this stack.
  Parameters:
    `val` - the boolean to be pushed onto this stack.
  Returns:
    the `item` argument.

### pop

    public final boolean 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.
  Throws:
    EmptyStackException - if this stack is empty.

### popAndTop

    public final boolean popAndTop()

  Removes the object at the top of this stack and returns the next object at the top as the value of this function.
  Returns:
    Next object to the top or false if none there

### setTop

    public final void setTop(boolean b)

  Set the item at the top of this stack
  Parameters:
    `b` - Object to set at the top of this stack

### peek

    public final boolean 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:
    EmptyStackException - if this stack is empty.

### peekOrFalse

    public final boolean peekOrFalse()

  Looks at the object at the top of this stack without removing it from the stack. If the stack is empty, it returns false.
  Returns:
    the object at the top of this stack.

### peekOrTrue

    public final boolean peekOrTrue()

  Looks at the object at the top of this stack without removing it from the stack. If the stack is empty, it returns true.
  Returns:
    the object at the top of this stack.

### isEmpty

    public boolean isEmpty()

  Tests if this stack is empty.
  Returns:
    `true` if this stack is empty; `false` otherwise.

### clone

    public java.lang.Object clone()
                           throws java.lang.CloneNotSupportedException

Copyright © 2006 Apache XML Project. All Rights Reserved.