com.mirth.connect.util.TcpUtil.java Source code

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Here is the source code for com.mirth.connect.util.TcpUtil.java

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/*
 * Copyright (c) Mirth Corporation. All rights reserved.
 * 
 * http://www.mirthcorp.com
 * 
 * The software in this package is published under the terms of the MPL license a copy of which has
 * been included with this distribution in the LICENSE.txt file.
 */

package com.mirth.connect.util;

import java.io.ByteArrayOutputStream;

import org.apache.commons.lang3.StringUtils;

public class TcpUtil {

    public static final String DEFAULT_LLP_START_BYTES = "0B"; // <VT>
    public static final String DEFAULT_LLP_END_BYTES = "1C0D"; // <FS><CR>

    public static boolean isValidHexString(String str) {
        return str.matches("^[0-9A-F]*$");
    }

    public static String convertHexToAbbreviation(String str) {
        if (isValidHexString(str)) {
            return getByteAbbreviation(stringToByteArray(str));
        } else {
            return "Invalid Hex";
        }
    }

    public static String getByteAbbreviation(byte[] bytes) {
        StringBuilder builder = new StringBuilder();

        for (byte b : bytes) {
            //@formatter:off
            switch (b) {
            case 0x00:
                builder.append("<NUL>");
                break;
            case 0x01:
                builder.append("<SOH>");
                break;
            case 0x02:
                builder.append("<STX>");
                break;
            case 0x03:
                builder.append("<ETX>");
                break;
            case 0x04:
                builder.append("<EOT>");
                break;
            case 0x05:
                builder.append("<ENQ>");
                break;
            case 0x06:
                builder.append("<ACK>");
                break;
            case 0x07:
                builder.append("<BEL>");
                break;
            case 0x08:
                builder.append("<BS>");
                break;
            case 0x09:
                builder.append("<TAB>");
                break;
            case 0x0A:
                builder.append("<LF>");
                break;
            case 0x0B:
                builder.append("<VT>");
                break;
            case 0x0C:
                builder.append("<FF>");
                break;
            case 0x0D:
                builder.append("<CR>");
                break;
            case 0x0E:
                builder.append("<SO>");
                break;
            case 0x0F:
                builder.append("<SI>");
                break;
            case 0x10:
                builder.append("<DLE>");
                break;
            case 0x11:
                builder.append("<DC1>");
                break;
            case 0x12:
                builder.append("<DC2>");
                break;
            case 0x13:
                builder.append("<DC3>");
                break;
            case 0x14:
                builder.append("<DC4>");
                break;
            case 0x15:
                builder.append("<NAK>");
                break;
            case 0x16:
                builder.append("<SYN>");
                break;
            case 0x17:
                builder.append("<ETB>");
                break;
            case 0x18:
                builder.append("<CAN>");
                break;
            case 0x19:
                builder.append("<EM>");
                break;
            case 0x1A:
                builder.append("<SUB>");
                break;
            case 0x1B:
                builder.append("<ESC>");
                break;
            case 0x1C:
                builder.append("<FS>");
                break;
            case 0x1D:
                builder.append("<GS>");
                break;
            case 0x1E:
                builder.append("<RS>");
                break;
            case 0x1F:
                builder.append("<US>");
                break;
            case 0x20:
                builder.append("<Space>");
                break;
            case 0x7F:
                builder.append("<DEL>");
                break;
            default:
                builder.append(new String(new byte[] { b }));
                break;
            }
            //@formatter:on
        }

        return builder.toString();
    }

    public static byte[] stringToByteArray(String str) {
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();

        if (StringUtils.isNotBlank(str)) {
            String hexString = str.toUpperCase().replaceAll("[^0-9A-F]", "");

            for (String hexByte : ((hexString.length() % 2 > 0 ? "0" : "") + hexString).split("(?<=\\G..)")) {
                bytes.write((byte) ((Character.digit(hexByte.charAt(0), 16) << 4)
                        + Character.digit(hexByte.charAt(1), 16)));
            }
        }

        return bytes.toByteArray();
    }

    public static String getFixedHost(String host) {
        if (host == null || host.length() == 0) {
            return "localhost";
        }
        return host;
    }
}