source: src/main/java/agents/anac/y2015/group2/G2UtilitySpace.java

package agents.anac.y2015.group2;

import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import agents.anac.y2015.group2.G2Issue;
import genius.core.issue.Objective;
import genius.core.issue.ValueDiscrete;
import genius.core.utility.AdditiveUtilitySpace;
import genius.core.utility.Evaluator;
import genius.core.utility.EvaluatorDiscrete;

class G2UtilitySpace {
        Map<String, G2Issue> utilities;
        G2Bid _lastBid;
        
        Map<String, G2Issue> extractUtilitiesFromUtilitySpace(AdditiveUtilitySpace utilitySpace) {
                HashMap<String, G2Issue> util = new HashMap<String, G2Issue>();
                
                Set<Entry<Objective, Evaluator>> evaluatorSet = utilitySpace.getEvaluators();
                for(Entry<Objective, Evaluator> entry : evaluatorSet) {
                        String name = ((Objective) entry.getKey()).getName();
                        G2Issue newIssue = new G2Issue();
                        newIssue.setWeight(utilitySpace.getWeight(entry.getKey().getNumber()));
                        
                        EvaluatorDiscrete evaluator = ((EvaluatorDiscrete)entry.getValue());
                        Set<ValueDiscrete> valueSet = evaluator.getValues();
                        for(ValueDiscrete value : valueSet) {
                                try {
                                        newIssue.putValue(value.getValue(), evaluator.getEvaluation(value));
                                } catch (Exception e) {
                                        // TODO Auto-generated catch block
                                        e.printStackTrace();
                                }
                        }
                        
                        util.put(name, newIssue);
                }
                return util;
        }
        
        public double calculateUtility(G2Bid bid) {
                double score = 0.0;
                
                for(Entry<String, String> entry : bid.getEntrySet()) {
                        score += utilities.get(entry.getKey()).getScoreForOption(entry.getValue());
                }
                
                return score;
        }
        public double calculateOptionUtility(String issue, String option) {
                return utilities.get(issue).getScoreForOption(option);
        }
        
        public void ResetWeights() {
                int size = utilities.size();
                for(G2Issue i: utilities.values()) {
                        i.setWeight(1.0/size);
                }
        }
        public void SetZeroPreferences() {
                for(G2Issue i: utilities.values()) {
                        i.SetZeroPreference();
                }
        }
        public void SetNeutralPreferences() {
                for(G2Issue i: utilities.values()) {
                        i.SetNeutralPreference();
                }
        }
        
        G2UtilitySpace(AdditiveUtilitySpace utilitySpace)
        {
                utilities = extractUtilitiesFromUtilitySpace(utilitySpace);
        }
        
        public void resetAll(){
                ResetWeights();
                SetNeutralPreferences();
        }
        
        public String allDataString() {
                Set<Entry<String, G2Issue>> entrySet = utilities.entrySet();
                String dataString = "";
                for(Entry<String, G2Issue> entry : entrySet) {
                        dataString += entry.getKey() + " weight:" + entry.getValue().weightString() + "\r\n";
                }
                return dataString;
        }
        
        public void updateIssues(G2Bid bid, int nBids){
                
                int hasChanged = 0;
                
                //@todo: update for initial bid
                if(_lastBid != null){

                        //update the value of the options based on the bid
                        for(Entry<String, String> entry:bid.getEntrySet() ){
                                utilities.get(entry.getKey()).increaseOption(entry.getValue(), nBids);
                                //keep track on how many issues the bid has changed since the last time
                                if(entry.getValue() != _lastBid.getChoice(entry.getKey())){
                                        hasChanged++;
                                }
                        }
                        
                        if(hasChanged > 0){
                                //update the weight of the issue
                                for(Entry<String, String> entry:bid.getEntrySet() ){
                                        if(entry.getValue() != _lastBid.getChoice(entry.getKey())){
                                                utilities.get(entry.getKey()).updateWeight(nBids, 1.0/hasChanged);
                                        }else{
                                                utilities.get(entry.getKey()).updateWeight(nBids, 0);
                                        }
                                }
                        }
                }
                _lastBid = bid;
        
        }
        
        public G2Issue getIssue(String issue){
                return utilities.get(issue);
        }
        
        public Set<Entry<String, G2Issue>> getIssues(){
                return utilities.entrySet();
        }
}