Java tutorial
/* * Copyright (c) 2015 Kyle Lieber * * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in * the Software without restriction, including without limitation the rights to * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of * the Software, and to permit persons to whom the Software is furnished to do so, * subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.github.klieber.phantomjs.util; import org.apache.maven.artifact.versioning.ArtifactVersion; import org.apache.maven.artifact.versioning.ComparableVersion; import org.apache.maven.artifact.versioning.DefaultArtifactVersion; import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException; import org.apache.maven.artifact.versioning.VersionRange; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class VersionUtil { private static final Logger LOGGER = LoggerFactory.getLogger(VersionUtil.class); public static int compare(String versionA, String versionB) { if (versionA == versionB) { return 0; } if (versionA == null) { return -1; } if (versionB == null) { return 1; } return new ComparableVersion(versionA).compareTo(new ComparableVersion(versionB)); } public static boolean isGreaterThan(String versionA, String versionB) { return compare(versionA, versionB) > 0; } public static boolean isLessThan(String versionA, String versionB) { return compare(versionA, versionB) < 0; } public static boolean isGreaterThanOrEqualTo(String versionA, String versionB) { return !VersionUtil.isLessThan(versionA, versionB); } public static boolean isLessThanOrEqualTo(String versionA, String versionB) { return !VersionUtil.isGreaterThan(versionA, versionB); } public static boolean isEqualTo(String versionA, String versionB) { return compare(versionA, versionB) == 0; } public static int compare(ArtifactVersion versionA, ArtifactVersion versionB) { if (versionA == versionB) { return 0; } if (versionA == null) { return -1; } if (versionB == null) { return 1; } return versionA.compareTo(versionB); } public static boolean isGreaterThanOrEqualTo(ArtifactVersion versionA, ArtifactVersion versionB) { return !VersionUtil.isLessThan(versionA, versionB); } public static boolean isLessThan(ArtifactVersion versionA, ArtifactVersion versionB) { return compare(versionA, versionB) < 0; } public static boolean isLessThanOrEqualTo(ArtifactVersion versionA, ArtifactVersion versionB) { return !VersionUtil.isGreaterThan(versionA, versionB); } public static boolean isGreaterThan(ArtifactVersion versionA, ArtifactVersion versionB) { return compare(versionA, versionB) > 0; } public static boolean isWithin(String version, VersionRange versionRange) { ArtifactVersion artifactVersion = new DefaultArtifactVersion(version); ArtifactVersion recommendedVersion = versionRange.getRecommendedVersion(); // treat recommended version as minimum version return recommendedVersion != null ? VersionUtil.isLessThanOrEqualTo(recommendedVersion, artifactVersion) : versionRange.containsVersion(artifactVersion); } public static boolean isWithin(String version, String versionSpec) { boolean within = false; try { return VersionUtil.isWithin(version, VersionRange.createFromVersionSpec(versionSpec)); } catch (InvalidVersionSpecificationException e) { LOGGER.warn("Invalid version specification: {}", versionSpec); } return within; } }