}

    protected abstract void merge(Metadata recessive);

    static Metadata read(Path metadataPath) throws RepositoryException {
        if (!Files.exists(metadataPath)) {
            return new Metadata();
        }

        try (InputStream input = Files.newInputStream(metadataPath)) {
            return new Metadata(new MetadataStaxReader().read(input, false));
        } catch (IOException | XMLStreamException e) {

        Path bin = installDir.resolve("bin"); // NOI18N
        if (Files.isDirectory(bin)) {
            if (Os.IS_WINDOWS) {
                Path tool = bin.resolve(toolName + ".exe");
                if (Files.exists(tool)) {
                    return tool;
                }
            }
            Path tool = bin.resolve(toolName);
            if (Files.exists(tool)) {
                return tool;
            }
        }

                Path tempDir = Files.createTempDirectory("smbtest");

                // Create directory structure
                Files.createDirectories(tempDir.resolve("public"));
                Files.createDirectories(tempDir.resolve("shared"));

                // Create some initial files
                Files.writeString(tempDir.resolve("public/readme.txt"), "This is a public share for testing");

            Path projectDir = tempDir.resolve("project");
            Files.createDirectories(projectDir);

            Path mvnDir = projectDir.resolve(".mvn");
            Files.createDirectories(mvnDir);
            Path existingFile = mvnDir.resolve("existing.txt");
            Files.writeString(existingFile, "existing content");

            UpgradeContext context = createMockContext(projectDir);

        Path dotMvn = cwd.resolve(".mvn");
        Files.createDirectories(dotMvn);
        Path projectExtensions = dotMvn.resolve("extensions.xml");
        Files.writeString(projectExtensions, extensionsXml);

        Path userConf = userHome.resolve(".m2");
        Files.createDirectories(userConf);
        Path userExtensions = userConf.resolve("extensions.xml");
        Files.writeString(userExtensions, extensionsXml);

            throws Exception {
        Files.createDirectories(cwd.resolve(".mvn"));
        Path pom = cwd.resolve("pom.xml").toAbsolutePath();
        Files.writeString(pom, POM_STRING);
        Path appJava = cwd.resolve("src/main/java/org/apache/maven/samples/sample/App.java");
        Files.createDirectories(appJava.getParent());
        Files.writeString(appJava, APP_JAVA_STRING);

			return false
		}
		// List of standard files supported by s3a
		// that involves a List() on a directory
		// where directory is actually an object on
		// namespace.
		for _, k := range []string{
			"_SUCCESS/",
			".parquet/",
			".csv/",
			".json/",
			".avro/",
			".orc/",
			".txt/",
			// Add any other files in future
		} {
			if strings.HasSuffix(prefix, k) {

        String result;
        ModelSource src = sourcePathProvider.get();
        if (src == null) {
            Files.deleteIfExists(target);
            result = null;
        } else if (!Files.exists(src.getPath())) {
            Files.deleteIfExists(target);
            result = "";
        } else {
            String current = ChecksumAlgorithmHelper.calculate(

                        }

                        file.isBuildReceipt() -> {
                            Files.copy(file, buildReceipt)
                        }

                        file.isUnseenManifestFilePath() -> {
                            seenManifest = true
                            Files.copy(file, manifest)
                        }
                    }
                    return FileVisitResult.CONTINUE

        try {
            Files.deleteIfExists(handleFile);
            log.debug("Removed persisted handle file: {}", handleFile);
        } catch (IOException e) {
            log.error("Failed to remove persisted handle file: " + handleFile, e);
        }
    }

    private void loadPersistedHandles() {
        if (!Files.exists(stateDirectory)) {
            return;
        }