Package org.apache.xml.utils

Class BoolStack

java.lang.Object
org.apache.xml.utils.BoolStack
All Implemented Interfaces:
Cloneable
public final class BoolStack
extends Object
implements Cloneable
Simple stack for boolean values.

  • Constructor Summary

    Constructors
    Constructor Description
    BoolStack()
    Default constructor.
    BoolStack​(int size)
    Construct a IntVector, using the given block size.

  • Method Summary

    Modifier and Type Method Description
    void clear()
    Clears the stack.
    Object clone()
    Creates and returns a copy of this Object.
    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, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • 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 Details

    • 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 Object clone() throws CloneNotSupportedException
      Description copied from class: Object
      Creates and returns a copy of this Object. The default implementation returns a so-called "shallow" copy: It creates a new instance of the same class and then copies the field values (including object references) from this instance to the new instance. A "deep" copy, in contrast, would also recursively clone nested objects. A subclass that needs to implement this kind of cloning should call super.clone() to create the new instance and then create deep copies of the nested, mutable objects.
      Overrides:
      clone in class Object
      Returns:
      a copy of this object.
      Throws:
      CloneNotSupportedException - if this object's class does not implement the Cloneable interface.