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import java.time.LocalDateTime;
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import java.util.*;
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import java.util.stream.Collectors;
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/**
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* 员工历史记录类 - 负责记录员工的历史变更信息
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* 遵循单一职责原则：只负责员工变更历史的记录和管理
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*/
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public class EmployeeHistory {
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private final String employeeId;
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private final List<ChangeRecord> historyRecords;
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/**
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* 构造函数
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* @param employeeId 员工ID
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*/
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public EmployeeHistory(String employeeId) {
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this.employeeId = employeeId;
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this.historyRecords = new ArrayList<>();
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}
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/**
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* 记录薪资调整历史
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* @param oldSalary 调整前薪资
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* @param newSalary 调整后薪资
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* @param reason 调整原因
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* @param changedBy 操作人
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*/
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public void recordSalaryChange(double oldSalary, double newSalary, String reason, String changedBy) {
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String description = String.format("薪资从 %.2f 调整为 %.2f", oldSalary, newSalary);
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ChangeRecord record = new ChangeRecord(ChangeType.SALARY_ADJUSTMENT,
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description, reason, changedBy);
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historyRecords.add(record);
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}
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/**
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* 记录职位变更历史
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* @param oldPosition 原职位
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* @param newPosition 新职位
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* @param reason 变更原因
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* @param changedBy 操作人
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*/
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public void recordPositionChange(String oldPosition, String newPosition, String reason, String changedBy) {
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String description = String.format("职位从 '%s' 变更为 '%s'", oldPosition, newPosition);
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ChangeRecord record = new ChangeRecord(ChangeType.POSITION_CHANGE,
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description, reason, changedBy);
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historyRecords.add(record);
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}
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/**
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* 记录部门变更历史
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* @param oldDepartment 原部门
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* @param newDepartment 新部门
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* @param reason 变更原因
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* @param changedBy 操作人
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*/
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public void recordDepartmentChange(String oldDepartment, String newDepartment, String reason, String changedBy) {
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String description = String.format("部门从 '%s' 变更为 '%s'", oldDepartment, newDepartment);
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ChangeRecord record = new ChangeRecord(ChangeType.DEPARTMENT_CHANGE,
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description, reason, changedBy);
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historyRecords.add(record);
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}
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/**
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* 记录员工状态变更历史（在职/离职）
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* @param newStatus 新状态
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* @param reason 变更原因
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* @param changedBy 操作人
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*/
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public void recordStatusChange(boolean newStatus, String reason, String changedBy) {
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String description = "状态变更为 " + (newStatus ? "在职" : "离职");
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ChangeRecord record = new ChangeRecord(ChangeType.STATUS_CHANGE,
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description, reason, changedBy);
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historyRecords.add(record);
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}
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/**
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* 记录员工基本信息变更历史
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* @param fieldName 变更的字段名
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* @param oldValue 旧值
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* @param newValue 新值
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* @param changedBy 操作人
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*/
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public void recordInfoChange(String fieldName, String oldValue, String newValue, String changedBy) {
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String description = String.format("%s 从 '%s' 变更为 '%s'", fieldName, oldValue, newValue);
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ChangeRecord record = new ChangeRecord(ChangeType.INFO_CHANGE,
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description, "信息更新", changedBy);
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historyRecords.add(record);
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}
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/**
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* 记录培训完成历史
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* @param courseName 课程名称
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* @param certificateId 证书ID
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* @param score 成绩
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* @param changedBy 操作人
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*/
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public void recordTrainingCompletion(String courseName, String certificateId, double score, String changedBy) {
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String description = String.format("完成课程 '%s'，证书ID: %s，成绩: %.2f",
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courseName, certificateId, score);
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ChangeRecord record = new ChangeRecord(ChangeType.TRAINING_COMPLETION,
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description, "培训完成", changedBy);
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historyRecords.add(record);
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}
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/**
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* 获取所有历史记录
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* @return 按时间倒序排列的历史记录列表
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*/
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public List<ChangeRecord> getAllHistory() {
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List<ChangeRecord> sortedRecords = new ArrayList<>(historyRecords);
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sortedRecords.sort(Comparator.comparing(ChangeRecord::getChangeTime).reversed());
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return sortedRecords;
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}
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/**
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* 按变更类型获取历史记录
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* @param changeType 变更类型
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* @return 指定类型的历史记录列表
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*/
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public List<ChangeRecord> getHistoryByType(ChangeType changeType) {
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return historyRecords.stream()
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.filter(record -> record.getChangeType() == changeType)
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.sorted(Comparator.comparing(ChangeRecord::getChangeTime).reversed())
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.collect(Collectors.toList());
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}
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/**
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* 获取特定时间段内的历史记录
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* @param startTime 开始时间
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* @param endTime 结束时间
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* @return 时间段内的历史记录列表
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*/
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public List<ChangeRecord> getHistoryByTimeRange(LocalDateTime startTime, LocalDateTime endTime) {
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return historyRecords.stream()
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.filter(record -> !record.getChangeTime().isBefore(startTime) &&
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!record.getChangeTime().isAfter(endTime))
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.sorted(Comparator.comparing(ChangeRecord::getChangeTime).reversed())
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.collect(Collectors.toList());
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}
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/**
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* 获取最后N条历史记录
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* @param n 记录数量
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* @return 最近的N条历史记录
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*/
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public List<ChangeRecord> getLatestHistory(int n) {
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List<ChangeRecord> sortedRecords = new ArrayList<>(historyRecords);
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sortedRecords.sort(Comparator.comparing(ChangeRecord::getChangeTime).reversed());
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return sortedRecords.stream().limit(n).collect(Collectors.toList());
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}
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/**
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* 获取薪资变更次数
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* @return 薪资变更次数
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*/
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public int getSalaryChangeCount() {
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return (int) historyRecords.stream()
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.filter(record -> record.getChangeType() == ChangeType.SALARY_ADJUSTMENT)
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.count();
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}
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/**
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* 获取职位变更次数
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* @return 职位变更次数
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*/
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public int getPositionChangeCount() {
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return (int) historyRecords.stream()
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.filter(record -> record.getChangeType() == ChangeType.POSITION_CHANGE)
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.count();
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}
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/**
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* 获取部门变更次数
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* @return 部门变更次数
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*/
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public int getDepartmentChangeCount() {
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return (int) historyRecords.stream()
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.filter(record -> record.getChangeType() == ChangeType.DEPARTMENT_CHANGE)
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.count();
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}
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/**
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* 获取培训完成次数
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* @return 培训完成次数
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*/
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public int getTrainingCompletionCount() {
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return (int) historyRecords.stream()
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.filter(record -> record.getChangeType() == ChangeType.TRAINING_COMPLETION)
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.count();
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}
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/**
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* 获取员工ID
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* @return 员工ID
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*/
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public String getEmployeeId() {
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return employeeId;
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}
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/**
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* 获取历史记录总数
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* @return 历史记录总数
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*/
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public int getTotalRecordCount() {
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return historyRecords.size();
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}
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/**
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* 变更类型枚举
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*/
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public enum ChangeType {
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SALARY_ADJUSTMENT, // 薪资调整
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POSITION_CHANGE, // 职位变更
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DEPARTMENT_CHANGE, // 部门变更
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STATUS_CHANGE, // 状态变更
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INFO_CHANGE, // 信息变更
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TRAINING_COMPLETION // 培训完成
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}
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/**
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* 变更记录内部类
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*/
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public static class ChangeRecord {
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private final ChangeType changeType;
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private final String description;
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private final String reason;
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private final String changedBy;
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private final LocalDateTime changeTime;
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public ChangeRecord(ChangeType changeType, String description, String reason, String changedBy) {
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this.changeType = changeType;
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this.description = description;
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this.reason = reason;
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this.changedBy = changedBy;
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this.changeTime = LocalDateTime.now();
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}
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public ChangeType getChangeType() { return changeType; }
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public String getDescription() { return description; }
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public String getReason() { return reason; }
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public String getChangedBy() { return changedBy; }
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public LocalDateTime getChangeTime() { return changeTime; }
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@Override
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public String toString() {
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return String.format("[%s] %s | 原因: %s | 操作人: %s | 时间: %s",
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changeType.name(), description, reason, changedBy, changeTime);
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}
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}
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} |
