/*
* Javlov - a Java toolkit for reinforcement learning with multi-agent support.
*
* Copyright (c) 2009 Matthijs Snel
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.javlov;
import net.javlov.policy.FixedOptionPolicy;
public abstract class AbstractPrimitiveAction extends AbstractOption implements Action {
private static final long serialVersionUID = 6695367929452993940L;
private Policy pi;
protected AbstractPrimitiveAction() {}
protected AbstractPrimitiveAction(String name) {
this();
setName(name);
}
@Override
public <T> void lastStep(State<T> s, double reward) {}
/**
* @inheritDoc
*
* Always returns 1.
*/
@Override
public <T> double getBeta(State<T> s) {
return 1;
}
/**
* @inheritDoc
*
* Always returns true.
*/
@Override
public boolean isFinished() {
return true;
}
/**
* @inheritDoc
*
* Does nothing.
*/
@Override
public <T> void update(State<T> s, Option o, double update) {}
@Override
public LearningRate getLearnRate() {
return null;
}
@Override
public void setLearnRate(LearningRate rate) {
throw new UnsupportedOperationException("Can't set the learning rate of a primitive action.");
}
@Override
public Policy getPolicy() {
if ( pi == null ) {
try {
pi = new FixedOptionPolicy(getClass().newInstance());
} catch (InstantiationException e) {
pi = new FixedOptionPolicy(this);
} catch (IllegalAccessException e) {
pi = new FixedOptionPolicy(this);
}
}
return pi;
}
@Override
public void setPolicy(Policy p) {
throw new UnsupportedOperationException("Can't set the policy of a primitive action.");
}
}