endrov.util.lazy
Class MemoizeX<E>

java.lang.Object
  endrov.util.lazy.MemoizeX<E>

All Implemented Interfaces:

ProgressHandle.Stoppable

Direct Known Subclasses:

EvImageReader, MemoizeXImmediate

public abstract class MemoizeX<E>
extends java.lang.Object
implements ProgressHandle.Stoppable

Lazy evaluation and memoization. Haskell semantics for java. My special brew with many additions

Field Summary

protected java.util.Set<java.lang.Object>

locksValue

Constructor Summary

MemoizeX()

Method Summary

void	dependsOn(MemoizeX<?> m)
protected abstract E	eval(ProgressHandle c) Evaluate value
void	evaluatePermanently(ProgressHandle c) Evaluate value permanently.
boolean	forget() Try and remove the calculated value from memory
E	get(ProgressHandle c) Get the value of this object.
java.lang.Long	getLastEvalTime()
boolean	isEvaluated()
static void	main(java.lang.String[] args)
void	signalStop() Notify that execution *might* be canceled

Methods inherited from class java.lang.Object

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

Field Detail

locksValue

protected java.util.Set<java.lang.Object> locksValue

Constructor Detail

MemoizeX

public MemoizeX()

Method Detail

getLastEvalTime

public java.lang.Long getLastEvalTime()

evaluatePermanently

public void evaluatePermanently(ProgressHandle c)

Evaluate value permanently. After this the value cannot be forgotten

forget

public boolean forget()

Try and remove the calculated value from memory

Returns:

If the value could be forgotten

eval

protected abstract E eval(ProgressHandle c)

Evaluate value

isEvaluated

public boolean isEvaluated()

get

public E get(ProgressHandle c)

Get the value of this object. Calculates the optimal way of executing previous objects and executes

dependsOn

public void dependsOn(MemoizeX<?> m)

signalStop

public void signalStop()

Notify that execution *might* be canceled

Specified by:

signalStop in interface ProgressHandle.Stoppable

main

public static void main(java.lang.String[] args)