Utils.java

/**
 * Copyright (c) 2010-2016 by the respective copyright holders.
 *
 * 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
 */
package org.openhab.binding.insteonplm.internal.utils;

import org.openhab.binding.insteonplm.internal.device.InsteonAddress;
import org.openhab.binding.insteonplm.internal.message.DataType;

/**
 * Various utility functions for e.g. hex string parsing
 * 
 * @author Daniel Pfrommer
 * @since 1.5.0
 */

public class Utils {
    public static String getHexString(int b) {
        String result = String.format("%02X", b & 0xFF);
        return result;
    }

    public static String getHexString(byte[] b) {
        return getHexString(b, b.length);
    }

    public static String getHexString(byte[] b, int len) {
        String result = "";
        for (int i = 0; i < b.length && i < len; i++) {
            result += String.format("%02X ", b[i] & 0xFF);
        }
        return result;
    }

    public static int strToInt(String s) throws NumberFormatException {
        int ret = -1;
        if (s.startsWith("0x")) {
            ret = Integer.parseInt(s.substring(2), 16);
        } else {
            ret = Integer.parseInt(s);
        }
        return (ret);
    }

    public static int fromHexString(String string) {
        return Integer.parseInt(string, 16);
    }

    public static int from0xHexString(String string) {
        String hex = string.substring(2);
        return fromHexString(hex);
    }

    public static String getHexByte(byte b) {
        return String.format("0x%02X", b & 0xFF);
    }

    public static String getHexByte(int b) {
        return String.format("0x%02X", b);
    }

    public static class DataTypeParser {
        public static Object s_parseDataType(DataType type, String val) {
            switch (type) {
                case BYTE:
                    return s_parseByte(val);
                case INT:
                    return s_parseInt(val);
                case FLOAT:
                    return s_parseFloat(val);
                case ADDRESS:
                    return s_parseAddress(val);
                default:
                    throw new IllegalArgumentException("Data Type not implemented in Field Value Parser!");
            }
        }

        public static byte s_parseByte(String val) {
            if (val != null && !val.trim().equals("")) {
                return (byte) Utils.from0xHexString(val.trim());
            } else {
                return 0x00;
            }
        }

        public static int s_parseInt(String val) {
            if (val != null && !val.trim().equals("")) {
                return Integer.parseInt(val);
            } else {
                return 0x00;
            }
        }

        public static float s_parseFloat(String val) {
            if (val != null && !val.trim().equals("")) {
                return Float.parseFloat(val.trim());
            } else {
                return 0;
            }
        }

        public static InsteonAddress s_parseAddress(String val) {
            if (val != null && !val.trim().equals("")) {
                return InsteonAddress.s_parseAddress(val.trim());
            } else {
                return new InsteonAddress();
            }
        }
    }

    /**
     * Exception to indicate various xml parsing errors.
     */
    @SuppressWarnings("serial")
    public static class ParsingException extends Exception {
        public ParsingException(String msg) {
            super(msg);
        }

        public ParsingException(String msg, Throwable cause) {
            super(msg, cause);
        }
    }
}