org.jmlspecs.samples.stacks
Class UnboundedStack

java.lang.Object
  org.jmlspecs.samples.stacks.UnboundedStack

Direct Known Subclasses:

UnboundedStackAsArrayList

public abstract class UnboundedStack

extends Object

Class Specifications

public invariant this.theStack != null; public initially this.theStack != null&&this.theStack.isEmpty();

Specifications inherited from class Object

represents objectState <- org.jmlspecs.lang.JMLDataGroup.IT; public represents _getClass <- \typeof(this);

Model Field Summary
JMLObjectSequence	theStack

 

Model fields inherited from class java.lang.Object

_getClass, objectState, theString

 

Ghost Field Summary

 

Ghost fields inherited from class java.lang.Object

objectTimesFinalized, owner

 

Constructor Summary

UnboundedStack()

 

Model Method Summary

 

Model methods inherited from class java.lang.Object

hashValue

 

Method Summary
abstract  void	pop()
abstract  void	push(Object x)
abstract  Object	top()

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Model Field Detail

theStack

public JMLObjectSequence theStack

Specifications:
datagroup contains: org.jmlspecs.samples.stacks.UnboundedStackAsArrayList.elems elems.theList

UnboundedStack

public UnboundedStack()

pop

public abstract void pop()

Specifications:

public normal_behavior
requires !this.theStack.isEmpty();
assignable theStack;
ensures this.theStack.equals(\old(this.theStack.trailer()));

push

public abstract void push(Object x)

Specifications:

public normal_behavior
assignable theStack;
ensures this.theStack.equals(\old(this.theStack.insertFront(x)));

top

public abstract Object top()

Specifications: pure

public normal_behavior
requires !this.theStack.isEmpty();
assignable \nothing;
ensures \result == this.theStack.first();