source: src/main/java/genius/core/boaframework/SessionData.java

package genius.core.boaframework;

import java.io.Serializable;

/**
 * In a BOAagent each component should be able to store data to be used in the next
 * negotiation session. Unfortunately, the ANAC2013 implementation only allows us to
 * store a single object. Therefore, this object packs the object of each of the three
 * BOA components (bidding strategy, etc.) together as a single object.
 * 
 * @author Mark Hendrikx
 */
public class SessionData implements Serializable {

        private static final long serialVersionUID = -2269008062554989046L;

        /** Object saved by the bidding strategy. */
        private Serializable biddingStrategyData;
        /** Object saved by the opponent model. */
        private Serializable opponentModelData;
        /** Object saved by the acceptance strategy. */
        private Serializable acceptanceStrategyData;
        /** Boolean used to mark that the object changed to avoid writing the same object to file. */
        private boolean changed;
        
        public SessionData() {
                biddingStrategyData = null;
                opponentModelData = null;
                acceptanceStrategyData = null;
                changed = false;
        }
        
        /**
         * Returns the data stored by the given BOA component.
         * @param type of the BOA component.
         * @return component saved by this BOA component, null is no object saved.
         */
        public Serializable getData(BoaType type) {
                Serializable result = null;
                if (type == BoaType.BIDDINGSTRATEGY) {
                        result = biddingStrategyData;
                } else if (type == BoaType.OPPONENTMODEL) {
                        result = opponentModelData;
                } else if (type == BoaType.ACCEPTANCESTRATEGY) {
                        result = acceptanceStrategyData;
                }
                return result;
        }

        /**
         * Method used to set the data to be saved by a BOA component.
         * This method should not be called directly, use the storeData()
         * and loadDate() of the component instead.
         * 
         * @param component from which the data is to be saved.
         * @param data to be saved.
         */
        public void setData(BoaType component, Serializable data) {
                if (component == BoaType.BIDDINGSTRATEGY) {
                        biddingStrategyData = data;
                } else if (component == BoaType.OPPONENTMODEL) {
                        opponentModelData = data;
                } else if (component == BoaType.ACCEPTANCESTRATEGY) {
                        acceptanceStrategyData = data;
                }
                changed = true;
        }

        /**
         * @return true if save was saved by a component.
         */
        public boolean isEmpty() {
                return biddingStrategyData == null && opponentModelData == null && acceptanceStrategyData == null;
        }

        /**
         * @return true if object was after its creation.
         */
        public boolean isChanged() {
                return changed;
        }

        /**
         * Sets that all changes have been processed.
         */
        public void changesCommitted() {
                changed = false;
        }
}