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我正在尝试为以下情况创建一个 dynamoDBMapper 注释。

我有 EmployeeLevelTrail，它是一个员工级别记录的类

@DynamoDBTable(tableName = TABLE_NAME)
public class EmployeeData {
    public final static String TABLE_NAME = “EmployeeDataRecord”;

    @DynamoDBAttribute(attributeName = “employeeID”)
    public String EmployeeID;

    @DynamoDBAttribute(attributeName = “EmployeeLevelDataRecords”)
    @DynamoDBTyped(DynamoDBMapperFieldModel.DynamoDBAttributeType.M)
    public EmployeeLevelTrail employeeLevelTrail

}


public class EmployeeLevelTrail {

    public final static String DDB_ATTR_EMPLOYEE_LEVEL_TRAIL = “employeeLevelTrail”;

    @DynamoDBAttribute(attributeName = DDB_ATTR_EMPLOYEE_LEVEL_TRAIL)
    private List<EmployeeLevelRecord> thisEmployeeLevelRecords;

    public void appendEmployeeLevelRecord(@NonNull EmployeeLevelRecord employeeLevelRecord) {

        thisEmployeeLevelRecords.add(employeeLevelRecord);

    }
}


public class EmployeeLevelRecord {

    private String Level;

    private String Manager;

    private Instant timeOfEvent;

}

这是我的注释，但它不正确，因为我无法保存我的 DynamoDB 数据