import org.apache.maven.api.di.Provides;
import org.apache.maven.api.di.Singleton;
import org.eclipse.aether.util.version.GenericVersionScheme;
import org.eclipse.aether.version.VersionScheme;

/**
 * Default version scheme provider: provides singleton {@link GenericVersionScheme} instance.
 */
@Singleton
@Named
public final class DefaultVersionSchemeProvider {

    @Provides
    static VersionScheme getVersionScheme() {

     *
     * @param version the version string to parse, must not be {@code null}
     * @return the parsed version, never {@code null}
     * @throws VersionParserException if the string violates the syntax rules of this scheme
     * @see org.apache.maven.api.Session#parseVersion(String)
     */
    @Nonnull
    Version parseVersion(@Nonnull String version);

    /**

import org.eclipse.aether.version.Version;
import org.eclipse.aether.version.VersionConstraint;
import org.eclipse.aether.version.VersionRange;
import org.eclipse.aether.version.VersionScheme;

/**
 * Default version scheme provider: provides singleton {@link GenericVersionScheme} instance.
 */
@Singleton
@Named
public class MavenVersionScheme implements VersionScheme {

    private final VersionScheme delegate = new GenericVersionScheme();

     *
     * @param version the version string to parse, must not be {@code null}
     * @return the parsed version, never {@code null}
     * @throws VersionParserException if the string violates the syntax rules of this scheme
     */
    @Nonnull
    Version parseVersion(@Nonnull String version);

    /**
     * Parses the specified version range specification, for example "[1.0,2.0)".
     *

     * the second version is the newer.
     */
    private static int compareModelVersions(String first, String second) {
        // we use a dedicated comparator because we control our model version scheme.
        String[] firstSegments = first.split("\\.");
        String[] secondSegments = second.split("\\.");
        for (int i = 0; i < Math.max(firstSegments.length, secondSegments.length); i++) {

Stephen Connolly <******@****.***> 1559594024 +0100

    private static final String BUILD_POM_CLASSIFIER = "build";

    private static final String NAMESPACE_FORMAT = "http://maven.apache.org/POM/%s";

    private static final String SCHEMA_LOCATION_FORMAT = "https://maven.apache.org/xsd/maven-%s.xsd";

    private final Set<Path> toDelete = new CopyOnWriteArraySet<>();

    private final ConsumerPomBuilder builder;

    @Inject

 themselves:

+-----+
<plugins>
  <plugin>
   <id>xdoc</id>
   <version>1.0</version>
   <parameters>
     <parameter>
       <name>theme</name>
       <value>classic</value>
     </parameter>
   </parameters>
  </plugin>
</plugins>
+-----+

Unified source directory

        checkVersionParsing("0.09", 0, 0, 0, 0, "0.09");
        checkVersionParsing("0.2.09", 0, 0, 0, 0, "0.2.09");
        checkVersionParsing("2.0-01", 2, 0, 0, 0, "01");

        // version schemes not really supported: fully transformed as qualifier
        checkVersionParsing("1.0.1b", 0, 0, 0, 0, "1.0.1b");
        checkVersionParsing("1.0M2", 0, 0, 0, 0, "1.0M2");
        checkVersionParsing("1.0RC2", 0, 0, 0, 0, "1.0RC2");

    }

    @Test
    void testFutureSchemaModelVersion() throws Exception {
        File f1 = getTestFile("src/test/resources/projects/future-schema-model-version-pom.xml");

        ProjectBuildingException e = assertThrows(
                ProjectBuildingException.class, () -> getProject(f1), "Expected to fail for future versions");