homework/ApprovalContext.java

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class ApprovalContext {
    private List<ApprovalRecord> approvalHistory = new ArrayList<>();
    private ApprovalStatus currentStatus = ApprovalStatus.PENDING;
    private String rejectionReason;
    private ApprovalLevel currentRequiredLevel;
    
    public void addApprovalRecord(Approver approver, boolean approved, String comment) {
        ApprovalRecord record = new ApprovalRecord(
            approver.getApproverName(), 
            new Date(), 
            approved, 
            comment
        );
        approvalHistory.add(record);
    }
    
    public List<ApprovalRecord> getApprovalHistory() {
        return new ArrayList<>(approvalHistory);
    }
    
    public ApprovalStatus getCurrentStatus() {
        return currentStatus;
    }
    
    public void setCurrentStatus(ApprovalStatus currentStatus) {
        this.currentStatus = currentStatus;
    }
    
    public String getRejectionReason() {
        return rejectionReason;
    }
    
    public void setRejectionReason(String rejectionReason) {
        this.rejectionReason = rejectionReason;
    }
    
    public ApprovalLevel getCurrentRequiredLevel() {
        return currentRequiredLevel;
    }
    
    public void setCurrentRequiredLevel(ApprovalLevel currentRequiredLevel) {
        this.currentRequiredLevel = currentRequiredLevel;
    }
    
    public static class ApprovalRecord {
        private String approverName;
        private Date approvalTime;
        private boolean approved;
        private String comment;
        
        public ApprovalRecord(String approverName, Date approvalTime, boolean approved, String comment) {
            this.approverName = approverName;
            this.approvalTime = approvalTime;
            this.approved = approved;
            this.comment = comment;
        }
        
        @Override
        public String toString() {
            return "ApprovalRecord{" +
                   "approverName='" + approverName + '\'' +
                   ", time=" + approvalTime +
                   ", approved=" + approved +
                   ", comment='" + comment + '\'' +
                   '}';
        }
    }
}