/**
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package org.cspoker.ai.bots.bot.gametree.mcts.strategies.selection;
import org.cspoker.ai.bots.bot.gametree.mcts.nodes.INode;
import org.cspoker.ai.bots.bot.gametree.mcts.nodes.InnerNode;
import com.google.common.collect.ImmutableList;
public abstract class MaxFunctionSelector implements SelectionStrategy {
@Override
public INode select(InnerNode innerNode) {
ImmutableList<INode> children = innerNode.getChildren();
INode maxNode = null;
double maxValue = Double.NEGATIVE_INFINITY;
for (INode node : children) {
double value = evaluate(node);
if(value>maxValue){
maxValue = value;
maxNode = node;
}
}
if(maxNode==null){
//fall back on max value selector which can't fail;
return (new MaxValueSelector()).select(innerNode);
}
return maxNode;
}
protected abstract double evaluate(INode node);
}