backend/buisnesslogic/src/main/java/com/plannaplan/entities/Exchange.java

package com.plannaplan.entities;

import java.sql.Timestamp;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;

/**
 * Entity that keeps user exchange offer.
 */
@Entity
public class Exchange {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @OneToOne
    @JoinColumn(name = "owned_id")
    private Assignment ownedAssignment;

    @OneToOne
    @JoinColumn(name = "desired_id")
    private Groups desiredAssignment;

    private Long ownerId;

    private Timestamp dateExchange;

    public Exchange(){

    }

    /**
     * @return Long ID of exchange trader
     */
    public Long getOwnerId() {
        return ownerId;
    }

    /**
     * @param ownerId ID of exchange trader
     */
    public void setOwnerId(Long ownerId) {
        this.ownerId = ownerId;
    }

    public Timestamp getDataExchange() {
	return this.dateExchange;
    }

    /**
     *
     * @param ownedAssignment  Assignment which owner would like to trade
     * @param desiredAssignment Groups instance that trader wants
     */
    public Exchange(Assignment ownedAssignment, Groups desiredAssignment) {
        this.ownedAssignment = ownedAssignment;
        this.desiredAssignment = desiredAssignment;
	this.ownerId = this.ownedAssignment != null ? this.ownedAssignment.getCommision().getCommisionOwner().getId() : null;
	this.dateExchange = new Timestamp(System.currentTimeMillis());
    }

    /**
     * @return Long ID in database
     */
    public Long getId(){
        return this.id;
    }

    /**
     * @return Groups Target group
     */
    public Groups getDesiredAssignment() {
        return desiredAssignment;
    }

    /**
     * @param desiredAssignment Target group
     */
    public void setDesiredAssignment(Groups desiredAssignment) {
        this.desiredAssignment = desiredAssignment;
    }

    /**
     * @return Assignment Owned assignment
     */
    public Assignment getOwnedAssignment() {
        return ownedAssignment;
    }

    /**
     * @param ownedAssignment Owned assignment
     */
    public void setOwnedAssignment(Assignment ownedAssignment) {
        this.ownedAssignment = ownedAssignment;
    }
}