fix: URL constructor deprecation warning as of Java 21

Author: sebthom

org.eclipse.tm4e.language_pack/updater/src/main/java/updater/AbstractSourceHandler.java

@@ -16,11 +16,11 @@
 import static updater.utils.Validation.isURL;
 
 import java.io.IOException;
-import java.net.URL;
+import java.net.URI;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.Map;
-import java.util.function.Function;
+import java.util.function.UnaryOperator;
 
 import javax.xml.XMLConstants;
 import javax.xml.parsers.DocumentBuilderFactory;
@@ -59,7 +59,7 @@ record DownloadContext(String targetNamePrefix, boolean updateExistingFiles, Pat
 	void downloadExampleFile(final DownloadContext ctx, final String examplePathOrURL) throws IOException {
 		if (examplePathOrURL != null) {
 			if (isURL(examplePathOrURL)) {
-				final var sourceURL = new URL(examplePathOrURL);
+				final var sourceURL = URI.create(examplePathOrURL).toURL();
 				final var targetFile = ctx.targetDir.resolve(ctx.targetNamePrefix + ".example." + getFileExtension(sourceURL.getPath()));
 				if (ctx.updateExistingFiles || !Files.exists(targetFile)) {
 					downloadFile(sourceURL, targetFile);
@@ -79,7 +79,7 @@ void downloadLangConfigurationJSONFile(final DownloadContext ctx, final String l
 			if (isURL(langCfgPathOrURL)) {
 				final var targetFile = ctx.targetDir.resolve(ctx.targetNamePrefix + ".language-configuration.json");
 				if (ctx.updateExistingFiles || !Files.exists(targetFile)) {
-					downloadFile(new URL(langCfgPathOrURL), targetFile);
+				   downloadFile(URI.create(langCfgPathOrURL).toURL(), targetFile);
 				}
 			} else {
 				final var targetFile = ctx.targetDir.resolve(ctx.targetNamePrefix + ".language-configuration.json");
@@ -112,15 +112,15 @@ void downloadLicenseFile(final Path targetDir) throws IOException {
 	 * @return grammarFile
 	 */
 	Path downloadTextMateGrammarFile(final DownloadContext ctx, final String grammarPathOrURL) throws IOException {
-		final Function<String, String> mapFileExt = fileExt -> switch (fileExt) {
+		final UnaryOperator<String> mapFileExt = fileExt -> switch (fileExt) {
 			case "json" -> ".tmLanguage.json";
 			case "yml", "yaml", "yaml-tmlanguage" -> ".tmLanguage.yaml";
 			case "plist", "xml", "tmlanguage" -> ".tmLanguage.plist";
 			default -> ".tmLanguage.plist";
 		};
 
 		if (isURL(grammarPathOrURL)) {
-			final var sourceURL = new URL(grammarPathOrURL);
+			final var sourceURL = URI.create(grammarPathOrURL).toURL();
 			final var targetFile = ctx.targetDir.resolve(ctx.targetNamePrefix + mapFileExt.apply(getFileExtension(sourceURL.getPath())
 					.toLowerCase()));
 			if (ctx.updateExistingFiles || !Files.exists(targetFile)) {

org.eclipse.tm4e.registry/src/main/java/org/eclipse/tm4e/registry/TMResource.java

@@ -17,7 +17,6 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URI;
-import java.net.URL;
 import java.nio.charset.StandardCharsets;
 
 import org.eclipse.core.runtime.FileLocator;
@@ -43,7 +42,7 @@ protected TMResource() {
 
 	protected TMResource(final IConfigurationElement ce) {
 		this(ce.getAttribute(XMLConstants.PATH_ATTR));
-		this.pluginId = ce.getNamespaceIdentifier();
+		pluginId = ce.getNamespaceIdentifier();
 	}
 
 	protected TMResource(final String path) {
@@ -77,15 +76,15 @@ public URI getURI() {
 	public InputStream getInputStream() throws IOException {
 		return new BufferedInputStream(pluginId == null
 				? new FileInputStream(new File(path))
-				: new URL(PLATFORM_PLUGIN + pluginId + '/' + path).openStream());
+				: URI.create(PLATFORM_PLUGIN + pluginId + '/' + path).toURL().openStream());
 	}
 
 	@Override
 	public long getLastModified() {
 		try {
 			return new File(pluginId == null //
 					? path
-					: FileLocator.resolve(new URL(PLATFORM_PLUGIN + pluginId + '/' + path)).getFile() //
+					: FileLocator.resolve(URI.create(PLATFORM_PLUGIN + pluginId + '/' + path).toURL()).getFile() //
 			).lastModified();
 		} catch (final IOException ex) {
 			return 0;