source: src/main/java/agents/similarity/Similarity.java

package agents.similarity;

import java.util.ArrayList;

import genius.core.Bid;
import genius.core.Domain;
import genius.core.xml.SimpleElement;

public class Similarity {
        private Domain fDomain;
        private double fWeights[];
        private ArrayList<SimilarityFunction> fSimilarityFunctions;

        public Similarity(Domain pDomain) {
                fDomain = pDomain;
                fSimilarityFunctions = new ArrayList<SimilarityFunction>();
        }

        public final double getSimilarity(Bid pMyBid, Bid pOpponentBid) {
                double lSimilarity = 0;
                for (int i = 0; i < fSimilarityFunctions.size(); i++) {
                        lSimilarity += fWeights[i]
                                        * fSimilarityFunctions.get(i).getSimilarityValue(pMyBid,
                                                        pOpponentBid);
                }

                return lSimilarity;
        }

        public void loadFromXML(SimpleElement pRoot) {
                SimpleElement lXMLUtilitySpace = (SimpleElement) (pRoot
                                .getChildByTagName("utility_space")[0]);
                SimpleElement lXMLObjective = (SimpleElement) (lXMLUtilitySpace
                                .getChildByTagName("objective")[0]);
                Object[] lXMLIssue = lXMLObjective.getChildByTagName("issue");
                fWeights = new double[lXMLIssue.length];
                for (int j = 0; j < lXMLIssue.length; j++) {
                        Object[] lXMLSimFn = ((SimpleElement) (lXMLIssue[j]))
                                        .getChildByTagName("similarity_function");
                        if (lXMLSimFn == null || lXMLSimFn.length == 0) {
                                continue;
                        }
                        SimilarityFunction lSimFn = new SimilarityFunction(fDomain);
                        // load weights
                        fWeights[j] = Double.valueOf(((SimpleElement) (lXMLSimFn[0]))
                                        .getAttribute("weight"));
                        lSimFn.loadFromXML((SimpleElement) (lXMLSimFn[0]), Integer
                                        .valueOf(((SimpleElement) (lXMLIssue[j]))
                                                        .getAttribute("index")));
                        fSimilarityFunctions.add(lSimFn);
                }// for
        }
}