diff options
Diffstat (limited to 'sdc-tosca/src/main/java/org/onap/sdc/tosca/parser/utils/GeneralUtility.java')
-rw-r--r-- | sdc-tosca/src/main/java/org/onap/sdc/tosca/parser/utils/GeneralUtility.java | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/sdc-tosca/src/main/java/org/onap/sdc/tosca/parser/utils/GeneralUtility.java b/sdc-tosca/src/main/java/org/onap/sdc/tosca/parser/utils/GeneralUtility.java new file mode 100644 index 0000000..02995a2 --- /dev/null +++ b/sdc-tosca/src/main/java/org/onap/sdc/tosca/parser/utils/GeneralUtility.java @@ -0,0 +1,73 @@ +/*- + * ============LICENSE_START======================================================= + * sdc-tosca + * ================================================================================ + * Copyright (C) 2017 - 2019 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ + +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); + } + +} |