001/*-
002 * #%L
003 * HAPI FHIR JPA Server
004 * %%
005 * Copyright (C) 2014 - 2024 Smile CDR, Inc.
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 *
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package ca.uhn.fhir.jpa.packages;
021
022import java.math.BigDecimal;
023import java.util.Comparator;
024
025import static org.apache.commons.lang3.StringUtils.isNumeric;
026
027public class PackageVersionComparator implements Comparator<String> {
028        public static final PackageVersionComparator INSTANCE = new PackageVersionComparator();
029
030        @Override
031        public int compare(String o1, String o2) {
032
033                String[] o1parts = o1.split("\\.");
034                String[] o2parts = o2.split("\\.");
035
036                for (int i = 0; i < o1parts.length && i < o2parts.length; i++) {
037                        String i1part = o1parts[i];
038                        String i2part = o2parts[i];
039
040                        if (isNumeric(i1part)) {
041                                if (isNumeric(i2part)) {
042                                        int cmp = new BigDecimal(i1part).compareTo(new BigDecimal(i2part));
043                                        if (cmp != 0) {
044                                                return cmp;
045                                        }
046                                }
047                        }
048
049                        int cmp = i1part.compareTo(i2part);
050                        if (cmp != 0) {
051                                return cmp;
052                        }
053                }
054
055                return o1parts.length - o2parts.length;
056        }
057
058        public static boolean isEquivalent(String theSpec, String thePackageVersion) {
059                String[] o1parts = theSpec.split("\\.");
060                String[] o2parts = thePackageVersion.split("\\.");
061
062                for (int i = 0; i < o1parts.length; i++) {
063                        if (!o1parts[i].equals("x")) {
064                                if (!o1parts[i].equals(o2parts[i])) {
065                                        return false;
066                                }
067                        }
068                }
069
070                return true;
071        }
072}