在做股票下单需求时，有这样几种下单模式
- 1.限价：用户可自主输入价格，与下单数量
- 2.市价：根据下单时的市价下单，用户只能输入下单数量。
- 3.策略：有多种策略类型，每种策略的下单价格，与下单数量是根据公式计算出来
在此下单模式中，
- 1.限价有参考报价上下限的限制
- 2.市价模式还分为：科创板市价交易类型，非科创板市价交易交易类型；科创板交易类型是最高买价与最低卖价进行交易
*在对应下单模式中，要默认填写对应下单价格，与默认下单数量 *
在此贴出部分代码
private fun chooseSaleType(position:Int){
tradeHxSaleTypeSelectedPosition = position
val tradeHxSaleTypeEntity = currentTradeSaleTypeEntity
if(tradeHxSaleTypeEntity.isLimitSaleType()){
mMarketValueTx.setText("限价")
mStepperMarketValue.hideDisableText()
}else if(tradeHxSaleTypeEntity.isStrategySaleType()){
mStepperMarketValue.showDisableText(tradeHxSaleTypeEntity?.name)
mMarketValueTx.setText("策略")
}else{
mStepperMarketValue.showDisableText(tradeHxSaleTypeEntity?.name)
mMarketValueTx.setText("市价")
}
changeSaleTradeBtn()
calcuAmount()
changeTradeBtnStatus()
}
private fun calcuAmount(){
if(mStockDetailInfo == null){
return
}
val result = getOrderPrice()
...........
val resultPosition =
if(mSaleType == 0){
if(currentTradeSaleTypeEntity==null||currentTradeSaleTypeEntity?.isLimitSaleType()!!){
calcal(availbleAssetsBigDecimal, BigDecimal(mStepperMarketValue.value),getBondTypeStepValue(),3)
} else if(currentTradeSaleTypeEntity?.isStrategySaleType()!!){
getStrategyPositionNum()
}else{
calcal(availbleAssetsBigDecimal,mStockDetailInfo?.calcuMarketPrice!!,getBondTypeStepValue(),3)
}
}else{
if(currentTradeSaleTypeEntity!=null&¤tTradeSaleTypeEntity!!.isStrategySaleType()){
getStrategyPositionNum()
}else{
if(mStockDetailInfo!=null&&mStockDetailInfo?.stockPositionInfo!=null) mStockDetailInfo!!.stockPositionInfo!!.availableBigDecimal!! else zeroBigDecimal
}
}
mStepperQulitityNum.tvStepperContent.setHint("可${if(mSaleType == 0) "买" else "卖"}${resultPosition}")
...........
}
private fun getOrderPrice():BigDecimal{
return if(mStepperQulitityNum.value == 0.0){
zeroBigDecimal
}else{
if(currentTradeSaleTypeEntity==null||currentTradeSaleTypeEntity?.isLimitSaleType()!!){
if(mStepperMarketValue.value == 0.0){
zeroBigDecimal
}else{
BigDecimal(mStepperQulitityNum.value).multiply(BigDecimal(mStepperMarketValue.value))
}
}else{
BigDecimal(mStepperQulitityNum.value).multiply(mStockDetailInfo?.calcuMarketPrice)
}
}.setScale(SCALE_POINT_NUMBER,BigDecimal.ROUND_HALF_UP)
}
当事后写完代码表示，这样的代码很难维护，阅读起来也很纠结。逼自己重构了前不久写的代码；重构后的代码，我的愿景是这样的。输入股票信息，交易类型，trigger一下，就可以反应在ui界面上。用户选择交易类型，trigger一下，也会对应发生改变，用户点击下单，根据输入价格、数量，如果不满足条件，弹出对应的提示框，满足的话，调用对应股票类型的下单接口。在获取股票信息这块，是根据股票code，type调用对应的接口
interface ITradeStrategy {
fun initStrategy(stockInfoEntity: TradeHxStockDetail, availbleAssetsBigDecimal:BigDecimal)
fun changeSaleType(saleType:Int)
fun calcu(orderNum:Int,unitPrice:String,positionType:Int?):String
fun order(orderNum:Int,unitPrice:String)
fun tradeStrategyTag():String
fun diablePriceInput():Boolean
}
abstract class BaseTradeStrategy :ITradeStrategy {
protected lateinit var availbleAssetsBigDecimal:BigDecimal
protected lateinit var stockInfoEntity: TradeHxStockDetail
override fun initStrategy(stockInfoEntity: TradeHxStockDetail, availbleAssetsBigDecimal: BigDecimal) {
this.stockInfoEntity = stockInfoEntity
this.availbleAssetsBigDecimal = availbleAssetsBigDecimal
}
protected var mSaleType = 0
override fun changeSaleType(saleType: Int) {
mSaleType = saleType
}
protected fun calcal(result:BigDecimal,d3:BigDecimal):BigDecimal{
return (result - result % d3).setScale( 0, BigDecimal.ROUND_DOWN )
}
private fun isBondType():Boolean{
return StockManager.TYPE_SH_BOND.equals(stockInfoEntity.market)|| StockManager.TYPE_SZ_BOND.equals(stockInfoEntity.market)
}
protected fun getBondTypeStepValue():BigDecimal{
return if(isBondType()) tenBigDecimal else hundredBigDecimal
}
}
class TradeStrategyProxy() : ITradeStrategy {
private var mTradeStrategy:ITradeStrategy?=null
private var mStockInfo: TradeHxStockDetail?=null
private var availbleAssetsBigDecimal = zeroBigDecimal
private var mTradeStrategyMap:SparseArray<ITradeStrategy> = SparseArray()
override fun initStrategy(stockInfoEntity: TradeHxStockDetail, availbleAssetsBigDecimal: BigDecimal) {
this.mStockInfo = stockInfoEntity
this.availbleAssetsBigDecimal = availbleAssetsBigDecimal
}
override fun changeSaleType(saleType: Int) {
mTradeStrategy?.changeSaleType(saleType)
}
fun triggerType(tradeSaleTypeEntity: TradeHxSaleTypeEntity?){
tradeSaleTypeEntity?:return
mStockInfo?:return
mTradeStrategy = if(tradeSaleTypeEntity.isLimitSaleType()){
mTradeStrategyMap.get(0)?:LimitTradeStrategyImpl().also {
mTradeStrategyMap.put(0,it)
}
}else if(tradeSaleTypeEntity.isStrategySaleType()){
mTradeStrategyMap.get(1)?:StrategyTradeStrategyImpl().also {
mTradeStrategyMap.put(1,it)
}
}else{
mTradeStrategyMap.get(2)?:MarketTradeStrategyImpl().also {
mTradeStrategyMap.put(2,it)
}
}
mTradeStrategy?.initStrategy(mStockInfo!!,availbleAssetsBigDecimal)
}
override fun calcu(orderNum: Int, unitPrice: String,positionType:Int?):String {
return mTradeStrategy?.calcu(orderNum,unitPrice,positionType)?:""
}
override fun order(orderNum: Int, unitPrice: String) {
mTradeStrategy?.order(orderNum,unitPrice)
}
override fun tradeStrategyTag(): String {
return mTradeStrategy?.tradeStrategyTag()?:""
}
override fun diablePriceInput(): Boolean {
return mTradeStrategy?.diablePriceInput()?:false
}
fun reset(){
mStockInfo = null
mTradeStrategy = null
}
}
以上代码可代理限价，市价，策略下单模式，具体逻辑可分散在对应的下单模式中
class LimitTradeStrategyImpl : BaseTradeStrategy() {
override fun calcu(orderNum: Int, unitPrice: String,positionType:Int?):String {
return if(mSaleType == 0){
calcal(availbleAssetsBigDecimal, BigDecimal(unitPrice),getBondTypeStepValue(),positionType)
}else{
stockInfoEntity.stockPositionInfo.availableBigDecimal!!
}.setScale(2,BigDecimal.ROUND_HALF_UP).toString()
}
override fun order(orderNum: Int, unitPrice: String) {
}
override fun tradeStrategyTag(): String {
return "限价"
}
override fun diablePriceInput(): Boolean {
return false
}
}
class MarketTradeStrategyImpl : BaseTradeStrategy() {
override fun calcu(orderNum: Int, unitPrice: String, positionType: Int?): String {
TODO("Not yet implemented")
}
override fun order(orderNum: Int, unitPrice: String) {
TODO("Not yet implemented")
}
override fun tradeStrategyTag(): String {
return "市价"
}
override fun diablePriceInput(): Boolean {
return true
}
}
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