程序员的量化交易之路（27）--Cointrader之PriceData价格数据（14）

转载须注明出处：http://blog.csdn.net/minimicall?viewmode=contents，http://cloudtrade.top/

PriceData：价格数据。价格数据是市场数据的子类。

具体代码如下：

package org.cryptocoinpartners.schema;

import java.math.BigDecimal;

import javax.annotation.Nullable;
import javax.persistence.MappedSuperclass;
import javax.persistence.Transient;

import org.joda.time.Instant;

/**
* Superclass for any MarketData which contains a price and volume, such as an Offer or a Trade ？？？靠，这个有问题。不过整个平台的代码其实很垃圾。
*
* @author Tim Olson
*/
@MappedSuperclass
public abstract class PriceData extends MarketData {

/**
* @param time when the pricing event originally occured
* @param remoteKey the exchange's unique ID for the pricing event (to prevent duplicates)
* @param market which Market this pricing is for
* @param priceCount relative to the Market's quoteBasis
* @param volumeCount relative to the Market's volumeBasis
*/
public PriceData(Instant time, @Nullable String remoteKey, Market market, @Nullable Long priceCount, @Nullable Long volumeCount) {
super(time, remoteKey, market);
this.priceCount = priceCount;
this.volumeCount = volumeCount;
}

public PriceData(Instant time, @Nullable String remoteKey, Market market, @Nullable BigDecimal price, @Nullable BigDecimal volume) {
super(time, remoteKey, market);
this.priceCount = DiscreteAmount.roundedCountForBasis(price, market.getPriceBasis());
this.volumeCount = DiscreteAmount.roundedCountForBasis(volume, market.getVolumeBasis());
}

/**
* @param time when the pricing event originally occured
* @param remoteKey the exchange's unique ID for the pricing event (to prevent duplicates)
* @param market which Market this pricing is for
* @param priceCount relative to the Market's quoteBasis
* @param volumeCount relative to the Market's volumeBasis
*/
public PriceData(Instant time, Instant timeReceived, @Nullable String remoteKey, Market market, @Nullable Long priceCount, @Nullable Long volumeCount) {
super(time, timeReceived, remoteKey, market);
this.priceCount = priceCount;
this.volumeCount = volumeCount;
}

public PriceData(Instant time, Instant timeReceived, @Nullable String remoteKey, Market market, @Nullable BigDecimal price, @Nullable BigDecimal volume) {
super(time, timeReceived, remoteKey, market);
this.priceCount = DiscreteAmount.roundedCountForBasis(price, market.getPriceBasis());
this.volumeCount = DiscreteAmount.roundedCountForBasis(volume, market.getVolumeBasis());
}

public @Nullable
Long getPriceCount() {
return priceCount;
}

public @Nullable
Long getVolumeCount() {
return volumeCount;
}

@Transient
@Nullable
public DiscreteAmount getPrice() {
if (priceCount == null)
return null;
if (price == null)
price = new DiscreteAmount(priceCount, getMarket().getPriceBasis());
return price;
}

@Transient
@Nullable
public Double getPriceAsDouble() {
Amount price = getPrice();
return price == null ? null : price.asDouble();
}

@Transient
@Nullable
public Double getPriceCountAsDouble() {
Long price = getPriceCount();
return price == null ? null : price.doubleValue();
}

@Transient
@Nullable
public Double getVolumeCountAsDouble() {
Long volume = getVolumeCount();
return volume == null ? null : volume.doubleValue();
}

@Transient
@Nullable
public BigDecimal getPriceAsBigDecimal() {
Amount price = getPrice();
return price == null ? null : price.asBigDecimal();
}

@Transient
@Nullable
public DiscreteAmount getVolume() {
if (volumeCount == null)
return null;
if (volume == null)
volume = new DiscreteAmount(volumeCount, getMarket().getVolumeBasis());
return volume;
}

@Transient
@Nullable
public Double getVolumeAsDouble() {
Amount volume = getVolume();
return volume == null ? null : volume.asDouble();
}

@Transient
@Nullable
public BigDecimal getVolumeAsBigDecimal() {
Amount volume = getVolume();
return volume == null ? null : volume.asBigDecimal();
}

// JPA
protected PriceData() {
super();
}

protected void setPriceCount(Long priceCount) {
this.priceCount = priceCount;
}

protected void setVolumeCount(Long volumeCount) {
this.volumeCount = volumeCount;
}

private DiscreteAmount price;//价
private DiscreteAmount volume;//量
private Long priceCount;
private Long volumeCount;
}