Implement archivepath getfilename

src/main/java/io/mkr/archivefs/fs/ArchivePath.java

@@ -9,11 +9,11 @@
 
 public class ArchivePath implements Path {
 
-  private ArchiveFileSystem fileSystem;
-  private String localPath;
-  private PathSegments pathSegments;
+  private final ArchiveFileSystem fileSystem;
+  private final String localPath;
+  private final PathSegments pathSegments;
 
-  public ArchivePath(ArchiveFileSystem fileSystem, String localPath) {
+  public ArchivePath(final ArchiveFileSystem fileSystem, final String localPath) {
     this.fileSystem = fileSystem;
     this.localPath = localPath;
     this.pathSegments = new PathSegments(localPath);
@@ -36,7 +36,7 @@ public Path getRoot() {
 
   @Override
   public Path getFileName() {
-    throw new UnsupportedOperationException();
+    return fileSystem.getPath(localPath.substring(localPath.lastIndexOf('/') + 1));
   }
 
   @Override
@@ -50,32 +50,32 @@ public int getNameCount() {
   }
 
   @Override
-  public Path getName(int index) {
+  public Path getName(final int index) {
     return null;  //Todo
   }
 
   @Override
-  public Path subpath(int beginIndex, int endIndex) {
+  public Path subpath(final int beginIndex, final int endIndex) {
     return null;  //Todo
   }
 
   @Override
-  public boolean startsWith(Path other) {
+  public boolean startsWith(final Path other) {
     return false;  //Todo
   }
 
   @Override
-  public boolean startsWith(String other) {
+  public boolean startsWith(final String other) {
     return false;  //Todo
   }
 
   @Override
-  public boolean endsWith(Path other) {
+  public boolean endsWith(final Path other) {
     return false;  //Todo
   }
 
   @Override
-  public boolean endsWith(String other) {
+  public boolean endsWith(final String other) {
     return false;  //Todo
   }
 
@@ -85,27 +85,27 @@ public Path normalize() {
   }
 
   @Override
-  public Path resolve(Path other) {
+  public Path resolve(final Path other) {
     return null;  //Todo
   }
 
   @Override
-  public Path resolve(String other) {
+  public Path resolve(final String other) {
     return null;  //Todo
   }
 
   @Override
-  public Path resolveSibling(Path other) {
+  public Path resolveSibling(final Path other) {
     return null;  //Todo
   }
 
   @Override
-  public Path resolveSibling(String other) {
+  public Path resolveSibling(final String other) {
     return null;  //Todo
   }
 
   @Override
-  public Path relativize(Path other) {
+  public Path relativize(final Path other) {
     return null;  //Todo
   }
 
@@ -128,7 +128,7 @@ public Path toAbsolutePath() {
   }
 
   @Override
-  public Path toRealPath(LinkOption... options) throws IOException {
+  public Path toRealPath(final LinkOption... options) throws IOException {
     return this;
   }
 
@@ -138,12 +138,12 @@ public File toFile() {
   }
 
   @Override
-  public WatchKey register(WatchService watcher, WatchEvent.Kind<?>[] events, WatchEvent.Modifier... modifiers) throws IOException {
+  public WatchKey register(final WatchService watcher, final WatchEvent.Kind<?>[] events, final WatchEvent.Modifier... modifiers) throws IOException {
     throw new UnsupportedOperationException();
   }
 
   @Override
-  public WatchKey register(WatchService watcher, WatchEvent.Kind<?>... events) throws IOException {
+  public WatchKey register(final WatchService watcher, final WatchEvent.Kind<?>... events) throws IOException {
     throw new UnsupportedOperationException();
   }
 
@@ -153,7 +153,7 @@ public Iterator<Path> iterator() {
   }
 
   @Override
-  public int compareTo(Path other) {
+  public int compareTo(final Path other) {
     return 0;  //Todo
   }
 
@@ -166,7 +166,7 @@ public String toString() {
     return localPath;
   }
 
-  public DirectoryStream<Path> newDirectoryStream(DirectoryStream.Filter<? super Path> filter) {
+  public DirectoryStream<Path> newDirectoryStream(final DirectoryStream.Filter<? super Path> filter) {
     return fileSystem.newDirectoryStream(this, filter);
   }
 

src/test/java/io/mkr/archivefs/fs/ArchivePathTest.java

@@ -0,0 +1,48 @@
+package io.mkr.archivefs.fs;
+
+import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
+import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.FileSystem;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.HashMap;
+
+import static org.junit.jupiter.api.Assertions.assertAll;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class ArchivePathTest {
+
+    /**
+     * Provider for the archive file system implementation.
+     */
+    private static final ArchiveFilesystemProvider afsp = new ArchiveFilesystemProvider();
+
+    @Test
+    void getFileName(@TempDir Path tempDir) throws IOException {
+        final Path testFile = tempDir.resolve("test.zip");
+        try (final ZipArchiveOutputStream out = new ZipArchiveOutputStream(Files.newOutputStream(testFile))) {
+            final String content = "Test";
+            final ZipArchiveEntry entry = new ZipArchiveEntry("test.txt");
+            entry.setSize(content.length());
+            out.putArchiveEntry(entry);
+            out.write(content.getBytes(StandardCharsets.UTF_8));
+            out.closeArchiveEntry();
+        }
+
+        try (final FileSystem afs = afsp.newFileSystem(testFile, new HashMap<>())) {
+            final Path testFileInArchive = afs.getPath("/test.txt");
+            final Path fileName = testFileInArchive.getFileName();
+            assertAll(
+                    () -> assertTrue(fileName instanceof ArchivePath),
+                    () -> assertEquals("test.txt", fileName.toString())
+            );
+        }
+    }
+
+}