diff options
Diffstat (limited to 'src/main/java/org/onap/sdc/tosca/parser/utils/GeneralUtility.java')
-rw-r--r-- | src/main/java/org/onap/sdc/tosca/parser/utils/GeneralUtility.java | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/main/java/org/onap/sdc/tosca/parser/utils/GeneralUtility.java b/src/main/java/org/onap/sdc/tosca/parser/utils/GeneralUtility.java new file mode 100644 index 0000000..cddccd3 --- /dev/null +++ b/src/main/java/org/onap/sdc/tosca/parser/utils/GeneralUtility.java @@ -0,0 +1,53 @@ +package org.onap.sdc.tosca.parser.utils; + +import java.util.Arrays; + +public class GeneralUtility { + + public static boolean isEmptyString(String str) { + return str == null || str.trim().isEmpty(); + } + + + /** + * Compares two version strings. + * <p> + * Use this instead of String.compareTo() for a non-lexicographical + * comparison that works for version strings. e.g. "1.10".compareTo("1.6"). + * + * @param str1 a string of ordinal numbers separated by decimal points. + * @param str2 a string of ordinal numbers separated by decimal points. + * @return The result is a negative integer if str1 is _numerically_ less than str2. + * The result is a positive integer if str1 is _numerically_ greater than str2. + * The result is zero if the strings are _numerically_ equal. + * It does not work if "1.10" is supposed to be equal to "1.10.0". + */ + public static int conformanceLevelCompare(String str1, String str2) { + String[] vals1 = str1.split("\\."); + String[] vals2 = str2.split("\\."); + int i = 0; + // set index to first non-equal ordinal or length of shortest version string + while (i < vals1.length && i < vals2.length && vals1[i].equals(vals2[i])) { + i++; + } + // compare first non-equal ordinal number + if (i < vals1.length && i < vals2.length) { + int diff = Integer.valueOf(vals1[i]).compareTo(Integer.valueOf(vals2[i])); + return Integer.signum(diff); + } + //in case of 0 after the . e.g: "3" = "3.0" or "3.0.0.0" = "3.0" + str2 = str2.substring(i).replace(".", ""); + str1 = str1.substring(i).replace(".", ""); + if ((!(str1.equals(""))) && Integer.valueOf(str1) == 0){ + vals1 = Arrays.copyOf(vals1, i); + } + if ((!(str2.equals(""))) && Integer.valueOf(str2) == 0){ + vals2 = Arrays.copyOf(vals2, i); + } + + // the strings are equal or one string is a substring of the other + // e.g. "1.2.3" = "1.2.3" or "1.2.3" < "1.2.3.4" + return Integer.signum(vals1.length - vals2.length); + } + +} |