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/*
* Copyright 2015 Open Networking Laboratory
*
* 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 org.onosproject.pcep.tools;
import javax.xml.bind.DatatypeConverter;
/**
* tools fo pcep app.
*/
public abstract class PcepTools {
private PcepTools() {
}
/**
* Converts decimal byte array to a hex string.
*
* @param byteArray byte array
* @return a hex string
*/
public static String toHexString(byte[] byteArray) {
return DatatypeConverter.printHexBinary(byteArray);
}
/**
* Converts a hex string to a decimal byte array.
*
* @param hexString a hex string
* @return byte array
*/
public static byte[] toByteArray(String hexString) {
return DatatypeConverter.parseHexBinary(hexString);
}
/**
* Converts a byte array to a decimal string.
*
* @param bytes a byte array
* @return a decimal string
*/
public static String toDecimalString(byte[] bytes) {
String str = "";
for (int i = 0; i < bytes.length; i++) {
str += String.valueOf(bytes[i]);
}
return str;
}
/**
* convert a string to the form of ip address.
*
* @param str a string
* @return a string with ip format
*/
public static String stringToIp(String str) {
long ipInt = Long.parseLong(str, 16);
return longToIp(ipInt);
}
/**
* convert a long to ip format.
*
* @param ipLong a decimal number.
* @return a ip format string
*/
public static String longToIp(long ipLong) {
StringBuilder sb = new StringBuilder();
sb.append((ipLong >> 24) & 0xFF).append(".");
sb.append((ipLong >> 16) & 0xFF).append(".");
sb.append((ipLong >> 8) & 0xFF).append(".");
sb.append(ipLong & 0xFF);
return sb.toString();
}
/**
* convert a string with ip format to a long.
*
* @param strIp a string with ip format
* @return a long number
*/
public static long ipToLong(String strIp) {
long[] ip = new long[4];
int position1 = strIp.indexOf(".");
int position2 = strIp.indexOf(".", position1 + 1);
int position3 = strIp.indexOf(".", position2 + 1);
ip[0] = Long.parseLong(strIp.substring(0, position1));
ip[1] = Long.parseLong(strIp.substring(position1 + 1, position2));
ip[2] = Long.parseLong(strIp.substring(position2 + 1, position3));
ip[3] = Long.parseLong(strIp.substring(position3 + 1));
return (ip[0] << 24) + (ip[1] << 16) + (ip[2] << 8) + ip[3];
}
/**
* get a integer value from a cut string.
*
* @param str a whole string
* @param base cut the string from this index
* @param offset the offset when execute the cut
* @return a integer value
*/
public static int tranferHexStringToInt(String str, int base, int offset) {
return Integer.parseInt(str.substring(base, offset), 16);
}
}
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