/*
 * Copyright (C) 2016 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.googlecode.android_scripting;

public class ConvertUtils {
    /**
     * Converts a String of comma separated bytes to a byte array
     *
     * @param value The value to convert
     * @return the byte array
     */
    public static byte[] convertStringToByteArray(String value) {
        if (value.equals("")) {
            return new byte[0];
        }
        String[] parseString = value.split(",");
        byte[] byteArray = new byte[parseString.length];
        if (byteArray.length > 0) {
            for (int i = 0; i < parseString.length; i++) {
                int val = Integer.valueOf(parseString[i].trim());
                if (val < 0 || val > 255)
                    throw new java.lang.NumberFormatException("Val must be between 0 and 255");
                byteArray[i] = (byte)val;
            }
        }
        return byteArray;
    }

    /**
     * Converts a byte array to a comma separated String
     *
     * @param byteArray
     * @return comma separated string of bytes
     */
    public static String convertByteArrayToString(byte[] byteArray) {
        String ret = "";
        if (byteArray != null) {
            for (int i = 0; i < byteArray.length; i++) {
                if ((i + 1) != byteArray.length) {
                    ret = ret + Integer.valueOf((byteArray[i]&0xFF)) + ",";
                }
                else {
                    ret = ret + Integer.valueOf((byteArray[i]&0xFF));
                }
            }
        }
        return ret;
    }

}