CreaMsg.java

/*
 * Copyright (c) 2004-2011 Marco Maccaferri and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Marco Maccaferri - initial API and implementation
 */

package org.eclipsetrader.directa.internal.core.messages;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

public class CreaMsg {

    public static final int LOGIN_MSG = 1;
    public static final int LOGIN_ACK_MSG = 2;
    public static final int LOGOUT_MSG = 3;
    public static final int PORT_MSG = 4;
    public static final int START_DATA_MSG = 5;
    public static final int STOP_DATA_MSG = 6;
    public static final int DATA_MSG = 7;
    public static final int ERROR_MSG = 8;

    public static final int PORT_ADD = 1;
    public static final int PORT_DEL = 2;
    public static final int PORT_MOD = 3;
    public static final int PORT_DST = 4;

    public CreaMsg() {
    }

    public static byte[] creaLoginMsg(String urt, String prt, String appName, String version) {
        byte[] msg = new byte[424];
        internalCreaMsg(msg, LOGIN_MSG, 420);
        System.arraycopy(urt.getBytes(), 0, msg, 4, urt.getBytes().length);
        System.arraycopy(prt.getBytes(), 0, msg, 14, prt.getBytes().length);
        System.arraycopy(appName.getBytes(), 0, msg, 24, Math.min(appName.getBytes().length, 10));
        System.arraycopy(version.getBytes(), 0, msg, 34, Math.min(version.getBytes().length, 10));
        System.arraycopy("DIRECTA".getBytes(), 0, msg, 44, Math.min("DIRECTA".getBytes().length, 10)); //$NON-NLS-1$ //$NON-NLS-2$
        System.arraycopy("141".getBytes(), 0, msg, 54, Math.min("141".getBytes().length, 10)); //$NON-NLS-1$ //$NON-NLS-2$
        return msg;
    }

    public static byte[] creaPortMsg(int op, String symbols[], int flags[]) {
        ByteArrayOutputStream os = new ByteArrayOutputStream();

        int j = Math.min(symbols.length, 30);
        byte[] msg = new byte[4 + j * 33 + 2];
        internalCreaMsg(msg, PORT_MSG, j * 33 + 2);
        msg[4] = (byte) op;
        msg[5] = (byte) j;
        if (symbols.length != flags.length || symbols.length == 0) {
            return msg;
        }
        int k = 0;
        int l = 6;
        for (int i1 = 38; k < j; i1 += 33) {
            System.arraycopy(symbols[k].getBytes(), 0, msg, l, symbols[k].getBytes().length);
            msg[i1] = (byte) flags[k];
            k++;
            l += 33;
        }
        try {
            os.write(msg);
        } catch (IOException e) {
            e.printStackTrace();
        }

        return os.toByteArray();
    }

    public static byte[] creaStartDataMsg() {
        byte[] msg = new byte[4];
        internalCreaMsg(msg, START_DATA_MSG, 0);
        return msg;
    }

    public static byte[] creaStopDataMsg() {
        byte[] msg = new byte[4];
        internalCreaMsg(msg, STOP_DATA_MSG, 0);
        return msg;
    }

    public static byte[] creaLogoutMsg() {
        byte[] msg = new byte[4];
        internalCreaMsg(msg, LOGOUT_MSG, 0);
        return msg;
    }

    private static void internalCreaMsg(byte[] msg, int type, int length) {
        if (msg.length < 4) {
            return;
        }
        byte byte0 = (byte) (length >> 8);
        byte byte1 = (byte) (length - (byte0 << 8));
        byte abyte1[] = {
                35, (byte) type, byte1, byte0
        };
        for (int k = 0; k < abyte1.length; k++) {
            msg[k] = abyte1[k];
        }

    }
}