} else {
                File file = artifact.getFile();
                log.debug("  Included {} located at {}", id, file);
                realm.addURL(file.toURI().toURL());
            }
        }
        return CoreExtensionEntry.discoverFrom(
                realm,
                Collections.singleton(artifacts.get(0).getFile()),
                extension.getGroupId() + ":" + extension.getArtifactId(),

            return project.getFile();
        }

        // Get the matching artifact from the project
        Artifact projectArtifact = findMatchingArtifact(project, artifact);
        if (projectArtifact != null) {
            // If the artifact has been associated to a file, use it
            File packagedArtifactFile = projectArtifact.getFile();

        this.projectId = (project != null)
                ? project.getGroupId() + ':' + project.getArtifactId() + ':' + project.getVersion()
                : "";
        this.pomFile = (project != null) ? project.getFile() : null;
        this.project = project;
        this.problems = problems != null ? problems : Collections.emptyList();
        this.dependencyResolutionResult = dependencyResolutionResult;
    }

    /**

                    throw e;
                }

                logger.debug("  Artifact " + artifact.getId() + " resolved to " + artifact.getFile());

                artifact.setResolved(true);
            } else if (!artifact.getFile().exists()) {
                String error = updateCheckManager.getError(artifact, repository);
                if (error != null) {

        MavenProject project1 = ex1.getResults().get(0).getProject();
        assertNotNull(project1);
        assertEquals("testArtifactMissingVersion", project1.getArtifactId());
        assertEquals(pomFile, project1.getFile());

        // multi projects build entry point
        ProjectBuildingException ex2 = assertThrows(
                ProjectBuildingException.class,

            this.ids = new ArrayList<>(extensionArtifacts.size());

            for (Artifact artifact : extensionArtifacts) {
                File file = artifact.getFile();
                files.add(file);
                timestamps.add((file != null) ? Long.valueOf(file.lastModified()) : Long.valueOf(0));
                sizes.add((file != null) ? Long.valueOf(file.length()) : Long.valueOf(0));

                os.setVersion(profileOs.getVersion());

                activation.setOs(os);
            }

            org.apache.maven.profiles.ActivationFile profileFile = profileActivation.getFile();

            if (profileFile != null) {
                ActivationFile file = new ActivationFile();

                file.setExists(profileFile.getExists());
                file.setMissing(profileFile.getMissing());

    }

    @Test
    void testGetFile() {
        File txtFile = new File("target/test-classes/source.txt");
        FileSource source = new FileSource(txtFile);
        assertEquals(txtFile.getAbsoluteFile(), source.getFile());
    }

        assertEquals(getRoot() + "Program File", ResourceUtil.getFileName(url));
        url = ResourceUtil.getResource("java/lang/String.class");
        assertNull(ResourceUtil.getFile(url));
    }

    private String getRoot() throws IOException {
        final String root = new File("/").getCanonicalPath().replace('\\', '/');
        if (root.startsWith("/")) {
            return root;

                plugin.getVersion(),
                null,
                "maven-plugin",
                null,
                new PluginArtifactHandler());
        this.plugin = plugin;
        setFile(pluginArtifact.getFile());
        setResolved(true);
    }

    @Override
    public List<Dependency> getDependencies() {
        return plugin.getDependencies();
    }

    @Override