/**
* Copyright (C) 2011-2012 Barchart, Inc. <http://www.barchart.com/>
*
* All rights reserved. Licensed under the OSI BSD License.
*
* http://www.opensource.org/licenses/bsd-license.php
*/
package com.barchart.feed.ddf.message.provider;
import static com.barchart.util.ascii.ASCII.*;
import java.nio.ByteBuffer;
import com.barchart.feed.ddf.message.api.DDF_MarketParameter;
import com.barchart.feed.ddf.message.api.DDF_MessageVisitor;
import com.barchart.feed.ddf.message.enums.DDF_MessageType;
import com.barchart.feed.ddf.message.enums.DDF_ParamType;
import com.barchart.feed.ddf.util.HelperDDF;
import com.barchart.util.values.api.PriceValue;
import com.barchart.util.values.api.SizeValue;
// TODO: Auto-generated Javadoc
class DF_20_Param extends BaseMarket implements DDF_MarketParameter {
/* (non-Javadoc)
* @see com.barchart.feed.ddf.message.provider.Base#accept(com.barchart.feed.ddf.message.api.DDF_MessageVisitor, java.lang.Object)
*/
@Override
public <Result, Param> Result accept(
DDF_MessageVisitor<Result, Param> visitor, Param param) {
return visitor.visit(this, param);
}
DF_20_Param() {
super(DDF_MessageType.PARAM);
}
DF_20_Param(final DDF_MessageType messageType) {
super(messageType);
}
// //////////////////////////////////////
private byte ordParam = DDF_ParamType.UNKNOWN.ord;
/**
* can represent:
*
* 1) price (with exponent from fraction);
*
* 2) size (regardless of the exponent in fraction):
*/
protected long value = HelperDDF.DDF_EMPTY;
// //////////////////////////////////////
/* (non-Javadoc)
* @see com.barchart.feed.ddf.message.api.DDF_MarketParameter#getParamType()
*/
@Override
public final DDF_ParamType getParamType() {
return DDF_ParamType.fromOrd(ordParam);
}
/**
* Sets the param type.
*
* @param type the new param type
*/
public final void setParamType(final DDF_ParamType type) {
ordParam = type.ord;
}
/* (non-Javadoc)
* @see com.barchart.feed.ddf.message.api.DDF_MarketParameter#getAsPrice()
*/
@Override
public final PriceValue getAsPrice() {
return HelperDDF.newPriceDDF(value, getFraction());
}
/* (non-Javadoc)
* @see com.barchart.feed.ddf.message.api.DDF_MarketParameter#getAsSize()
*/
@Override
public final SizeValue getAsSize() {
return HelperDDF.newSizeDDF(value);
}
/*
* <soh><rec><symbol>,<subrec><stx><base><exch>(<delay>)(,)(<spread>)||
*
* <value>,<element><modifier>
*
* ||<day><session><etx>||<time stamp>
*/
@Override
protected final void encodeBody(final ByteBuffer buffer) {
final DDF_ParamType param = getParamType();
switch (param.kind) {
default:
case SIZE:
HelperDDF.longEncode(value, buffer, COMMA); // <value>,
break;
case PRICE:
HelperDDF.decimalEncode(value, getFraction(), buffer, COMMA); // <value>,
break;
}
buffer.putChar(param.code); // <element> <modifier>
}
@Override
protected final void decodeBody(final ByteBuffer buffer) {
final long value = HelperDDF.longDecode(buffer, COMMA); // <value>,
final char code = buffer.getChar(); // <element> <modifier>
final DDF_ParamType param = DDF_ParamType.fromCode(code);
ordParam = param.ord;
switch (param.kind) {
default:
case SIZE:
this.value = value;
break;
case PRICE:
this.value = HelperDDF.fromBinaryToDecimal(value, getFraction());
break;
}
}
@Override
protected void appedFields(final StringBuilder text) {
super.appedFields(text);
text.append("param type : ");
text.append(getParamType());
text.append("\n");
text.append("param value : ");
text.append(value);
text.append("\n");
}
}