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/*-
* ============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);
}
}
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