com.ibm.bluej.consistency.util

Class RecomputeStack<Key,Value>

java.lang.Object

com.ibm.bluej.consistency.util.RecomputeStack<Key,Value>

public class RecomputeStack<Key,Value>
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RecomputeStack.StackElement<Key,Value>

Constructor Summary

Constructors

Constructor and Description
RecomputeStack()

Method Summary

Methods

Modifier and Type	Method and Description
RecomputeStack.StackElement<Key,Value>	pop() Pops the element on the top of the stack, removing it.
RecomputeStack.StackElement<Key,Value>	push(Key key, Value value) Complex operation, if the key is not present, it will create at the beginning of the stack, a new element with the value If the key is present, it will be pushed to the bottom of the stack and the existing element is returned unchanged

Methods inherited from class java.lang.Object

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

Constructor Detail

RecomputeStack

public RecomputeStack()

Method Detail

push

public RecomputeStack.StackElement<Key,Value> push(Key key,
                                          Value value)

Complex operation, if the key is not present, it will create at the beginning of the stack, a new element with the value If the key is present, it will be pushed to the bottom of the stack and the existing element is returned unchanged

Parameters:

key -

value -

Returns:

The existing mapping from key if present, null if key did not exist prior to the call

pop

public RecomputeStack.StackElement<Key,Value> pop()

Pops the element on the top of the stack, removing it. null if empty

Returns: