source: voting/src/main/java/geniusweb/voting/evaluatorwithvalue/LargestAgreementWithValue.java@ 52

package geniusweb.voting.evaluatorwithvalue;

import java.util.Collections;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnore;

import geniusweb.inform.Agreements;
import geniusweb.voting.CollectedVotesWithValue;
import geniusweb.voting.VotingEvaluatorWithValue;

/**
 * Take the first possible agreement, and take the largest possible agreement.
 * Stop after first agreement.
 */
public class LargestAgreementWithValue implements VotingEvaluatorWithValue {
        @JsonIgnore
        private final CollectedVotesWithValue allVotes;

        // caching
        @JsonIgnore
        private Agreements maxAgreements = null;

        @JsonCreator
        public LargestAgreementWithValue() {
                this(new CollectedVotesWithValue(Collections.emptyMap(),
                                Collections.emptyMap()));
        }

        protected LargestAgreementWithValue(CollectedVotesWithValue votes) {
                this.allVotes = votes;
        }

        @Override
        public Agreements getAgreements() {
                if (maxAgreements == null)
                        maxAgreements = new Agreements(allVotes.getMaxAgreements());
                return maxAgreements;
        }

        @Override
        public boolean isFinished() {
                return getAgreements().getMap().isEmpty();
        }

        @Override
        public VotingEvaluatorWithValue create(CollectedVotesWithValue votes) {
                return new LargestAgreementWithValue(votes);
        }

        @Override
        public int hashCode() {
                final int prime = 31;
                int result = 1;
                result = prime * result
                                + ((allVotes == null) ? 0 : allVotes.hashCode());
                return result;
        }

        @Override
        public boolean equals(Object obj) {
                if (this == obj)
                        return true;
                if (obj == null)
                        return false;
                if (getClass() != obj.getClass())
                        return false;
                LargestAgreementWithValue other = (LargestAgreementWithValue) obj;
                if (allVotes == null) {
                        if (other.allVotes != null)
                                return false;
                } else if (!allVotes.equals(other.allVotes))
                        return false;
                return true;
        }

        @Override
        public String toString() {
                return "LargestAgreement";
        }
}