/// <summary>
/// 返回结算策略对象 <see cref="IDateTypeStrategy"/>
/// </summary>
/// <value>
/// The <see cref="IDateTypeStrategy"/>.
/// </value>
/// <param name="type">结算方式</param>
/// <returns></returns>
public IDateTypeStrategy this[RepaymentTimeUnitType type]
{
get
{
return(dict.ContainsKey(type) ? dict[type] : null);
}
}
/// <summary>
/// 获取 <see cref="IRepaymentCalc"/> 还款计算器.
/// </summary>
/// <value>
/// 还款计算器 <see cref="IRepaymentCalc"/>.
/// </value>
/// <param name="dtype">结算方式</param>
/// <param name="reType">还款模型</param>
/// <param name="startDate">开始结算时间</param>
/// <returns></returns>
public IRepaymentCalc this[RepaymentTimeUnitType dtype, RepaymentType reType, DateTime startDate]
{
get
{
if (reType == RepaymentType.期付息N期还本)
{
throw new ArgumentException("该方法不能创建按期付息N期还本之本金固定");
}
if (reType == RepaymentType.期付息L期还本)
{
throw new ArgumentException("该方法不能创建按期付息N期还本之本金缩小");
}
switch (reType)
{
case RepaymentType.等额本息:
return(new 等额本息(dtype, startDate));
case RepaymentType.等额本金:
return(new 等额本金(dtype, startDate));
default:
case RepaymentType.一次性还本付息:
return(new 一次性还本付息(dtype, startDate));
case RepaymentType.期付息到期还本:
return(new 期付息到期还本(dtype, startDate));
case RepaymentType.等本等息:
return(new 等本等息(dtype, startDate));
}
}
}
/// <summary>
/// 获取 <see cref="IRepaymentCalc"/> 还款计算器.
/// </summary>
/// <value>
/// 还款计算器 <see cref="IRepaymentCalc"/>.
/// </value>
/// <param name="dtype">结算方式</param>
/// <param name="reType">还款模型</param>
/// <returns></returns>
public IRepaymentCalc this[RepaymentTimeUnitType dtype, RepaymentType reType]
{
get
{
return(this[dtype, reType, DateTime.Now]);
}
}
/// <summary>
/// 获取 <see cref="IRepaymentCalc"/> 还款计算器.
/// </summary>
/// <value>
/// 还款计算器 <see cref="IRepaymentCalc"/>.
/// </value>
/// <param name="dtype">结算方式</param>
/// <param name="reType">还款模型</param>
/// <param name="principalPeriods">本金的还款信息</param>
/// <returns></returns>
public IRepaymentCalc this[RepaymentTimeUnitType dtype, RepaymentType reType, IEnumerable <PrincipalRepayPercent> principalPeriods]
{
get
{
return(this[dtype, reType, principalPeriods, DateTime.Now]);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="等额本息"/> class.
/// </summary>
/// <param name="dateType">结算类型</param>
/// <param name="startDate">开始结算日期</param>
public 等额本息(RepaymentTimeUnitType dateType, DateTime startDate)
: base(dateType, startDate)
{
if (dateType != RepaymentTimeUnitType.月)
{
throw new DomainException("等额本息只能以月单位结算");
}
}
/// <summary>
/// Initializes a new instance of the <see cref="按期付息L期还本"/> class.
/// </summary>
/// <param name="dateType">结算类型</param>
/// <param name="startDate">开始结算日期</param>
/// <param name="principalPeriods">本金的还款信息</param>
public 期付息L期还本(RepaymentTimeUnitType dateType, DateTime startDate, IEnumerable <PrincipalRepayType> principalPeriods)
: base(dateType, startDate)
{
this.principalPeriods = principalPeriods ?? Enumerable.Empty <PrincipalRepayType>();
if (!this.principalPeriods.LastOrDefault().PayPrincipal)
{
throw new ArgumentException("最后一期一定是还款本金");
}
}
/// <summary>
/// Initializes a new instance of the <see cref="本金按百分比还"/> class.
/// </summary>
/// <param name="dateType">结算类型</param>
/// <param name="startDate">开始结算日期</param>
/// <param name="principalPeriods">本金的还款信息</param>
public 本金按百分比还(RepaymentTimeUnitType dateType, DateTime startDate, IEnumerable <PrincipalRepayPercent> principalPeriods)
: base(dateType, startDate)
{
this.principalPeriods = principalPeriods ?? Enumerable.Empty <PrincipalRepayPercent>();
if (this.principalPeriods.Sum(t => t.Percent) != 100)
{
throw new ArgumentException("所有还款期数总和不等于100%");
}
}
/// <summary>
/// Initializes a new instance of the <see cref="RepaymentCalc"/> class.
/// </summary>
/// <param name="dateType">结算类型</param>
/// <param name="startDate">开始结算日期</param>
protected RepaymentCalc(RepaymentTimeUnitType dateType, DateTime startDate)
{
this.StartDate = startDate;
this.DateType = dateType;
this.Strategy = Singleton <StrategyFactory> .Instance[dateType];
if (this.Strategy == null)
{
throw new ArgumentNullException("结算方式不在定义内");
}
}
/// <summary>
/// 获取 <see cref="IRepaymentCalc"/> 还款计算器.
/// </summary>
/// <value>
/// 还款计算器 <see cref="IRepaymentCalc"/>.
/// </value>
/// <param name="dtype">结算方式</param>
/// <param name="principalPeriods">本金的还款信息</param>
/// <param name="reType">还款模型</param>
/// <param name="startDate">开始结算时间</param>
/// <returns></returns>
public IRepaymentCalc this[RepaymentTimeUnitType dtype, RepaymentType reType, IEnumerable <PrincipalRepayPercent> principalPeriods, DateTime startDate]
{
get
{
switch (reType)
{
case RepaymentType.本金按百分比还:
return(new 本金按百分比还(dtype, startDate, principalPeriods));
}
return(this[dtype, reType, startDate]);
}
}
/// <summary>
/// 获取 <see cref="IRepaymentCalc"/> 还款计算器.
/// </summary>
/// <value>
/// 还款计算器 <see cref="IRepaymentCalc"/>.
/// </value>
/// <param name="dtype">结算方式</param>
/// <param name="principalPeriods">本金的还款信息</param>
/// <param name="reType">还款模型</param>
/// <param name="startDate">开始结算时间</param>
/// <returns></returns>
public IRepaymentCalc this[RepaymentTimeUnitType dtype, RepaymentType reType, IEnumerable <PrincipalRepayType> principalPeriods, DateTime startDate]
{
get
{
switch (reType)
{
case RepaymentType.期付息L期还本:
return(new 期付息L期还本(dtype, startDate, principalPeriods));
case RepaymentType.期付息N期还本:
return(new 期付息N期还本(dtype, startDate, principalPeriods));
}
return(this[dtype, reType, startDate]);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="等本等息"/> class.
/// </summary>
/// <param name="dateType">结算类型</param>
/// <param name="startDate">开始结算日期</param>
public 等本等息(RepaymentTimeUnitType dateType, DateTime startDate)
: base(dateType, startDate)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="按期付息到期还本"/> class.
/// </summary>
/// <param name="dateType">结算类型</param>
/// <param name="startDate">开始结算日期</param>
public 期付息到期还本(RepaymentTimeUnitType dateType, DateTime startDate)
: base(dateType, startDate)
{
}
