Package org.apache.xml.utils
Class BoolStack
- java.lang.Object
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- org.apache.xml.utils.BoolStack
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- All Implemented Interfaces:
java.lang.Cloneable
public final class BoolStack extends java.lang.Object implements java.lang.Cloneable
Simple stack for boolean values.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description 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 stackint
size()
Get the length of the list.
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Method Detail
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size
public final int size()
Get the length of the list.- Returns:
- Current length of the list
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clear
public final void clear()
Clears the stack.
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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.
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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.
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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
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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
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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.
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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.
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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.
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isEmpty
public boolean isEmpty()
Tests if this stack is empty.- Returns:
true
if this stack is empty;false
otherwise.
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clone
public java.lang.Object clone() throws java.lang.CloneNotSupportedException
- Throws:
java.lang.CloneNotSupportedException
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