com.barchart.feed.ddf.message.provider.BaseEOD.java Source code

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Here is the source code for com.barchart.feed.ddf.message.provider.BaseEOD.java

Source

/**
 * 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.feed.ddf.message.provider.CodecHelper.decodeFeedTimeStamp;
import static com.barchart.feed.ddf.message.provider.CodecHelper.encodeFeedTimeStamp;
import static com.barchart.util.common.ascii.ASCII.COMMA;
import static com.barchart.util.common.ascii.ASCII.ETX;
import static com.barchart.util.common.ascii.ASCII.MORE;
import static com.barchart.util.common.ascii.ASCII.SLASH;
import static com.barchart.util.common.ascii.ASCII._0_;

import java.nio.ByteBuffer;

import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;

import com.barchart.feed.ddf.message.enums.DDF_MessageType;
import com.barchart.feed.ddf.message.enums.DDF_Session;
import com.barchart.feed.ddf.message.enums.DDF_TradeDay;
import com.barchart.feed.ddf.util.HelperDDF;

/**
 * @author g-litchfield
 *
 */
abstract class BaseEOD extends BaseMarket {

    BaseEOD() {
        super(DDF_MessageType.EOD_CMDY);
    }

    BaseEOD(final DDF_MessageType messageType) {
        super(messageType);
    }

    // //////////////////////////////////////

    protected long priceOpen = HelperDDF.DDF_EMPTY;
    protected long priceHigh = HelperDDF.DDF_EMPTY;
    protected long priceLow = HelperDDF.DDF_EMPTY;
    protected long priceLast = HelperDDF.DDF_EMPTY;

    // //////////////////////////////////////

    /*
     * <soh>3<symbol>,C<stx><base><exchange ID><reserved><reserved>,
     * <date>,<open>,<high>,<low>,<last><etx>
     */

    protected static final void encodeInt(final int value, final ByteBuffer buffer, final int len) {

        assert len > 0;

        if (value > 10) {
            final int digit = value % 10;
            if (len > 1)
                encodeInt((value - digit) / 10, buffer, len - 1);
            buffer.put((byte) (digit + _0_));
        } else {
            buffer.put((byte) (value + _0_));
        }
    }

    protected static final int decodeInt(final ByteBuffer buffer, int len) {

        int value = 0;

        while (len > 0) {
            value *= 10;
            final int next = buffer.get() - _0_;
            if (next < 0 || next > 9)
                throw new IllegalArgumentException("Not an integer");
            value += next;
            len--;
        }

        return value;

    }

    protected final void decodeDay(final ByteBuffer buffer) {

        final int month = decodeInt(buffer, 2);
        check(buffer.get(), SLASH);
        final int day = decodeInt(buffer, 2);
        check(buffer.get(), SLASH);
        final int year = decodeInt(buffer, 4);
        check(buffer.get(), COMMA);

        final DateTime date = new DateTime(year, month, day, 0, 0, 0, DateTimeZone.UTC);

        setTradeDay(DDF_TradeDay.fromMillisUTC(date.getMillis()));

    }

    protected final void encodeDay(final ByteBuffer buffer) {

        final DateTime date = new DateTime(getTradeDay().tradeDate().asMillisUTC(), DateTimeZone.UTC);

        encodeInt(date.getMonthOfYear(), buffer, 2);
        buffer.put(SLASH);
        encodeInt(date.getDayOfMonth(), buffer, 2);
        buffer.put(SLASH);
        encodeInt(date.getYear(), buffer, 4);
        buffer.put(COMMA);

    }

    @Override
    protected final void encodeTail(final ByteBuffer buffer) {
        final DateTimeZone zone = getExchange().kind.time.zone;
        //
        buffer.put(ETX); // <etx>
        encodeFeedTimeStamp(millisUTC, zone, buffer);// <time stamp>
    }

    @Override
    protected final void decodeTail(final ByteBuffer buffer) {
        check(buffer.get(), ETX); // <etx>
        final DateTimeZone zone = getExchange().kind.time.zone;
        millisUTC = decodeFeedTimeStamp(zone, buffer); // <time stamp>
        setSession(DDF_Session.$_AT);
    }

    @Override
    protected final void encodeDelay(final ByteBuffer buffer) {
        buffer.put(MORE); // >
        buffer.put(MORE); // >
    }

    /**
     * More forgiving delay parser since many EOD messages pass >>
     */
    @Override
    protected final void decodeDelay(final ByteBuffer buffer) {
        delay = 0;
        check(buffer.get(), MORE); // >
        check(buffer.get(), MORE); // >
    }

}