1 package org.onap.sdc.tosca.parser.utils;
3 import java.util.Arrays;
5 public class GeneralUtility {
7 public static boolean isEmptyString(String str) {
8 return str == null || str.trim().isEmpty();
13 * Compares two version strings.
15 * Use this instead of String.compareTo() for a non-lexicographical
16 * comparison that works for version strings. e.g. "1.10".compareTo("1.6").
18 * @param str1 a string of ordinal numbers separated by decimal points.
19 * @param str2 a string of ordinal numbers separated by decimal points.
20 * @return The result is a negative integer if str1 is _numerically_ less than str2.
21 * The result is a positive integer if str1 is _numerically_ greater than str2.
22 * The result is zero if the strings are _numerically_ equal.
23 * It does not work if "1.10" is supposed to be equal to "1.10.0".
25 public static int conformanceLevelCompare(String str1, String str2) {
26 String[] vals1 = str1.split("\\.");
27 String[] vals2 = str2.split("\\.");
29 // set index to first non-equal ordinal or length of shortest version string
30 while (i < vals1.length && i < vals2.length && vals1[i].equals(vals2[i])) {
33 // compare first non-equal ordinal number
34 if (i < vals1.length && i < vals2.length) {
35 int diff = Integer.valueOf(vals1[i]).compareTo(Integer.valueOf(vals2[i]));
36 return Integer.signum(diff);
38 //in case of 0 after the . e.g: "3" = "3.0" or "3.0.0.0" = "3.0"
39 str2 = str2.substring(i).replace(".", "");
40 str1 = str1.substring(i).replace(".", "");
41 if ((!(str1.equals(""))) && Integer.valueOf(str1) == 0){
42 vals1 = Arrays.copyOf(vals1, i);
44 if ((!(str2.equals(""))) && Integer.valueOf(str2) == 0){
45 vals2 = Arrays.copyOf(vals2, i);
48 // the strings are equal or one string is a substring of the other
49 // e.g. "1.2.3" = "1.2.3" or "1.2.3" < "1.2.3.4"
50 return Integer.signum(vals1.length - vals2.length);