程序猿的量化交易之路(26)–Cointrader之Listing挂牌实体(13)

程序猿的量化交易之路(26)–Cointrader之Listing挂牌实体(13)

大家好,又见面了,我是全栈君。

转载须注明出处:http://blog.csdn.net/minimicall?

viewmode=contentshttp://cloudtrade.top

Listing:挂牌。

比方某仅仅股票在某证券交易所挂牌交易。也就是上市交易。

老规矩,通过源代码学习:

package org.cryptocoinpartners.schema;

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

import javax.persistence.Cacheable;
import javax.persistence.Entity;
import javax.persistence.Index;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.NoResultException;
import javax.persistence.PostPersist;
import javax.persistence.Table;
import javax.persistence.Transient;

import org.cryptocoinpartners.enumeration.FeeMethod;
import org.cryptocoinpartners.util.PersistUtil;

/**
 * Represents the possibility to trade one Asset for another
 */
@SuppressWarnings("UnusedDeclaration")
@Entity //在数据库创建Listing这个表
@Cacheable//可缓存
//命名查询
@NamedQueries({ @NamedQuery(name = "Listing.findByQuoteBase", query = "select a from Listing a where base=?1 and quote=?2 and prompt IS NULL"),
        @NamedQuery(name = "Listing.findByQuoteBasePrompt", query = "select a from Listing a where base=?1 and quote=?2 and prompt=?3") })
@Table(indexes = { @Index(columnList = "base"), @Index(columnList = "quote"), @Index(columnList = "prompt") })
//@Table(name = "listing", uniqueConstraints = { @UniqueConstraint(columnNames = { "base", "quote", "prompt" }),
//@UniqueConstraint(columnNames = { "base", "quote" }) })
public class Listing extends EntityBase {


<pre name="code" class="java">    protected Asset base;
    protected Asset quote;
    private Prompt prompt;


    @ManyToOne(optional = false)
    //@Column(unique = true)
    public Asset getBase() {
        return base;
    }

    @PostPersist
    private void postPersist() {
        //  PersistUtil.clear();
        //  PersistUtil.refresh(this);
        //PersistUtil.merge(this);
        // PersistUtil.close();
        //PersistUtil.evict(this);

    }

    @ManyToOne(optional = false)
    //@Column(unique = true)
    public Asset getQuote() {
        return quote;
    }

    @ManyToOne(optional = true)
    public Prompt getPrompt() {
        return prompt;
    }

    /** will create the listing if it doesn't exist */
    public static Listing forPair(Asset base, Asset quote) {

        try {
            Listing listing = PersistUtil.namedQueryZeroOne(Listing.class, "Listing.findByQuoteBase", base, quote);
            if (listing == null) {
                listing = new Listing(base, quote);
                PersistUtil.insert(listing);
            }
            return listing;
        } catch (NoResultException e) {
            final Listing listing = new Listing(base, quote);
            PersistUtil.insert(listing);
            return listing;
        }
    }

    public static Listing forPair(Asset base, Asset quote, Prompt prompt) {
        try {

            Listing listing = PersistUtil.namedQueryZeroOne(Listing.class, "Listing.findByQuoteBasePrompt", base, quote, prompt);
            if (listing == null) {
                listing = new Listing(base, quote, prompt);
                PersistUtil.insert(listing);
            }
            return listing;
        } catch (NoResultException e) {
            final Listing listing = new Listing(base, quote, prompt);
            PersistUtil.insert(listing);
            return listing;
        }
    }

    @Override
    public String toString() {
        return getSymbol();
    }

    @Transient
    public String getSymbol() {
        if (prompt != null)
            return base.getSymbol() + '.' + quote.getSymbol() + '.' + prompt;
        return base.getSymbol() + '.' + quote.getSymbol();
    }

    @Transient
    protected double getMultiplier() {
        if (prompt != null)
            return prompt.getMultiplier();
        return getContractSize() * getTickSize();
    }

    @Transient
    protected double getTickValue() {
        if (prompt != null)
            return prompt.getTickValue();
        return 1;
    }

    @Transient
    protected double getContractSize() {
        if (prompt != null)
            return prompt.getContractSize();
        return 1;
    }

    @Transient
    protected double getTickSize() {
        if (prompt != null)
            return prompt.getTickSize();
        return getPriceBasis();
    }

    @Transient
    protected Amount getMultiplierAsAmount() {

        return new DiscreteAmount((long) getMultiplier(), getVolumeBasis());
    }

    @Transient
    protected double getVolumeBasis() {
        double volumeBasis = 0;
        if (prompt != null)
            volumeBasis = prompt.getVolumeBasis();
        return volumeBasis == 0 ? getBase().getBasis() : volumeBasis;

    }

    @Transient
    public FeeMethod getMarginMethod() {
        FeeMethod marginMethod = null;
        if (prompt != null)
            marginMethod = prompt.getMarginMethod();
        return marginMethod == null ? null : marginMethod;

    }

    @Transient
    public FeeMethod getMarginFeeMethod() {
        FeeMethod marginFeeMethod = null;
        if (prompt != null)
            marginFeeMethod = prompt.getMarginFeeMethod();
        return marginFeeMethod == null ? null : marginFeeMethod;

    }

    @Transient
    protected double getPriceBasis() {
        double priceBasis = 0;
        if (prompt != null)
            priceBasis = prompt.getPriceBasis();
        return priceBasis == 0 ? getQuote().getBasis() : priceBasis;

    }

    @Transient
    protected Asset getTradedCurrency() {
        if (prompt != null && prompt.getTradedCurrency() != null)
            return prompt.getTradedCurrency();
        return getQuote();
    }

    @Transient
    public FeeMethod getFeeMethod() {
        if (prompt != null && prompt.getFeeMethod() != null)
            return prompt.getFeeMethod();
        return null;
    }

    @Transient
    public double getFeeRate() {
        if (prompt != null && prompt.getFeeRate() != 0)
            return prompt.getFeeRate();
        return 0;
    }

    @Transient
    protected int getMargin() {
        if (prompt != null && prompt.getMargin() != 0)
            return prompt.getMargin();
        return 0;
    }

    public static List<String> allSymbols() {
        List<String> result = new ArrayList<>();
        List<Listing> listings = PersistUtil.queryList(Listing.class, "select x from Listing x");
        for (Listing listing : listings)
            result.add((listing.getSymbol()));
        return result;
    }

    // JPA
    protected Listing() {
    }

    protected void setBase(Asset base) {
        this.base = base;
    }

    protected void setQuote(Asset quote) {
        this.quote = quote;
    }

    protected void setPrompt(Prompt prompt) {
        this.prompt = prompt;
    }


    public Listing(Asset base, Asset quote) {
        this.base = base;
        this.quote = quote;
    }

    public Listing(Asset base, Asset quote, Prompt prompt) {
        this.base = base;
        this.quote = quote;
        this.prompt = prompt;
    }

    public static Listing forSymbol(String symbol) {
        symbol = symbol.toUpperCase();
        final int dot = symbol.indexOf('.');
        if (dot == -1)
            throw new IllegalArgumentException("Invalid Listing symbol: \"" + symbol + "\"");
        final String baseSymbol = symbol.substring(0, dot);
        Asset base = Asset.forSymbol(baseSymbol);
        if (base == null)
            throw new IllegalArgumentException("Invalid base symbol: \"" + baseSymbol + "\"");
        int len = symbol.substring(dot + 1, symbol.length()).indexOf('.');
        len = (len != -1) ? Math.min(symbol.length(), dot + 1 + symbol.substring(dot + 1, symbol.length()).indexOf('.')) : symbol.length();
        final String quoteSymbol = symbol.substring(dot + 1, len);
        final String promptSymbol = (symbol.length() > len) ? symbol.substring(len + 1, symbol.length()) : null;
        Asset quote = Asset.forSymbol(quoteSymbol);
        if (quote == null)
            throw new IllegalArgumentException("Invalid quote symbol: \"" + quoteSymbol + "\"");
        if (promptSymbol == null)
            return Listing.forPair(base, quote);
        Prompt prompt = Prompt.forSymbol(promptSymbol);
        return Listing.forPair(base, quote, prompt);
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof Listing) {
            Listing listing = (Listing) obj;

            if (!listing.getBase().equals(getBase())) {
                return false;
            }

            if (!listing.getQuote().equals(getQuote())) {
                return false;
            }
            if (listing.getPrompt() != null)
                if (this.getPrompt() != null) {
                    if (!listing.getPrompt().equals(getPrompt()))
                        return false;
                } else {
                    return false;
                }

            return true;
        }

        return false;
    }

    @Override
    public int hashCode() {
        return getPrompt() != null ? getQuote().hashCode() + getBase().hashCode() + getPrompt().hashCode() : getQuote().hashCode() + getBase().hashCode();

    }

}

    protected Asset base;
    protected Asset quote;
    private Prompt prompt;

版权声明:本文内容由互联网用户自发贡献,该文观点仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 举报,一经查实,本站将立刻删除。

发布者:全栈程序员-用户IM,转载请注明出处:https://javaforall.cn/116308.html原文链接:https://javaforall.cn

【正版授权,激活自己账号】: Jetbrains全家桶Ide使用,1年售后保障,每天仅需1毛

【官方授权 正版激活】: 官方授权 正版激活 支持Jetbrains家族下所有IDE 使用个人JB账号...

(0)


相关推荐

  • R、RStudio下载与安装方法

    R、RStudio下载与安装方法现如今,R语言是统计领域广泛使用的工具,是属于GNU系统的一个自由、免费、源代码开放的软件,是用于统计计算和统计绘图的优秀工具。而RStudio是R的集成开发环境,用它进行R编程的学习和实践会更加轻松和方便。下面就教大家如何下载并安装R和RStudio,比较简单。R的维护工作由一个国际化的开发者团队负责。R软件的官方下载页面叫作TheComprehensiveRArchiveNetwor…

  • webstorm最新激活码2021【2021最新】

    (webstorm最新激活码2021)2021最新分享一个能用的的激活码出来,希望能帮到需要激活的朋友。目前这个是能用的,但是用的人多了之后也会失效,会不定时更新的,大家持续关注此网站~IntelliJ2021最新激活注册码,破解教程可免费永久激活,亲测有效,下面是详细链接哦~https://javaforall.cn/100143.html…

  • C# WinForm国际化的简单实现建议收藏

    软件行业发展到今天,国际化问题一直都占据非常重要的位置,而且应该越来越被重视。对于开发人员而言,在编写程序之前,国际化问题是首先要考虑的一个问题,也许有时候这个问题已经在设计者的考虑范围之内,但终归要

    2021年12月20日
  • 修改用户名Linux_Linux用户名

    修改用户名Linux_Linux用户名1.我们在root权限下,使用命令:usermod-lnew_user_nameold_user_name即可更改用户名。usermod的具体用法可以通过usermod–help查看。2.同样在root权限下,使用命令:hostname-vnew_host_name来更改域名。hostname的具体用法可以通过hostname–help查看。A…

  • kubernetes 1.14安装部署ingress

    kubernetes 1.14安装部署ingress

  • 手机chrome禁止加载图片_com组件未加载或被禁止

    手机chrome禁止加载图片_com组件未加载或被禁止splash禁止图片加载

    2022年10月23日

发表回复

您的电子邮箱地址不会被公开。

关注全栈程序员社区公众号