public static GA GAWithCheckpoint(String checkpoint) throws Exception {
File checkpointFile = new File(checkpoint);
FileInputStream zin = new FileInputStream(checkpointFile);
GZIPInputStream in = new GZIPInputStream(zin);
ObjectInputStream oin = new ObjectInputStream(in);
Checkpoint ckpt = (Checkpoint) oin.readObject();
GA ga = ckpt.ga;
ga._checkpoint = ckpt;
ckpt.checkpointNumber++; // because it gets increased only after ckpt is
// written
oin.close();
System.out.println(ckpt.report.toString());
// Do we want to append to the file if it exists? Or just overwrite it?
// Heu! Quae enim quaestio animas virorum vero pertemptit.
// Wowzers! This is, indeed, a question that truly tests mens' souls.
if (ga._outputfile != null) ga._outputStream = new FileOutputStream(new File(ga._outputfile));
else ga._outputStream = System.out;
return ga;
}
/**
* Factor method for creating a GA object, with the GA class specified by the problem-class
* parameter.
*/
public static GA GAWithParameters(HashMap<String, String> inParams) throws Exception {
Class<?> cls = Class.forName(inParams.get("problem-class"));
Object gaObject = cls.newInstance();
if (!(gaObject instanceof GA))
throw (new Exception("problem-class must inherit from class GA"));
GA ga = (GA) gaObject;
ga.SetParams(inParams);
ga.InitFromParameters();
return ga;
}
/**
* Runs the GA if the time since the last application of the GA is greater than the threshold.
*
* @param tStamp is the actual time
* @param envState is the environment state.
*/
public void runGA(int tStamp, double[] envState) {
if ((double) tStamp - getAverageClTime() >= Config.theta_GA && macroClSum > 0) {
setTimeOfClassifiers(tStamp);
ga.runGA(envState, this, tStamp);
}
} // end runGA