ec.util

Class Checkpoint

java.lang.Object

ec.util.Checkpoint

public class Checkpoint
extends java.lang.Object

Checkpoints ec.EvolutionState objects out to checkpoint files, or restores the same from checkpoint files. Checkpoint take the following form:

checkpointPrefix.generation.gz

...where checkpointPrefix is the checkpoing prefix given in ec.EvolutionState, and generation is the current generation number also given in ec.EvolutionState. The ".gz" is added because the file is GZIPped to save space.

When writing a checkpoint file, if you have specified a checkpoint directory in ec.EvolutionState.checkpointDirectory, then this directory will be used to write the checkpoint files. Otherwise they will be written in your working directory (where you ran the Java process).

Constructor Summary

Constructors

Constructor and Description
Checkpoint()

Method Summary

Modifier and Type	Method and Description
static EvolutionState	restoreFromCheckpoint(java.lang.String checkpoint) Returns an EvolutionState object read from a checkpoint file whose filename is checkpoint
static void	setCheckpoint(EvolutionState state) Writes the evolution state out to a file.

Methods inherited from class java.lang.Object

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

Constructor Detail

Checkpoint

public Checkpoint()

Method Detail

setCheckpoint

public static void setCheckpoint(EvolutionState state)

Writes the evolution state out to a file.

restoreFromCheckpoint

public static EvolutionState restoreFromCheckpoint(java.lang.String checkpoint)
                                            throws java.io.IOException,
                                                   java.lang.ClassNotFoundException,
                                                   java.io.OptionalDataException

Returns an EvolutionState object read from a checkpoint file whose filename is checkpoint

Throws:

java.lang.ClassNotFoundException - thrown when the checkpoint file contains a class reference which doesn't exist in your class hierarchy.

java.io.IOException

java.io.OptionalDataException