chore: Use modern language features

Author: helpermethod

src/main/java/io/github/helpermethod/zipforge/DirectoryNode.java

@@ -4,7 +4,6 @@
 import java.io.InputStream;
 import java.nio.file.Path;
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 
 public class DirectoryNode implements Node {
@@ -33,6 +32,6 @@ Path path() {
     }
 
     List<Node> children() {
-        return Collections.unmodifiableList(children);
+        return List.copyOf(children);
     }
 }

src/main/java/io/github/helpermethod/zipforge/FileNode.java

@@ -4,25 +4,9 @@
 import java.io.InputStream;
 import java.nio.file.Path;
 
-class FileNode implements Node {
-    private final Path path;
-    private final InputStream content;
-
-    FileNode(Path path, InputStream content) {
-        this.path = path;
-        this.content = content;
-    }
-
+public record FileNode(Path path, InputStream content) implements Node {
     @Override
     public void accept(Visitor visitor) throws IOException {
         visitor.visit(this);
     }
-
-    Path path() {
-        return path;
-    }
-
-    InputStream content() {
-        return content;
-    }
 }

src/main/java/io/github/helpermethod/zipforge/ZipFileVisitor.java

@@ -1,7 +1,6 @@
 package io.github.helpermethod.zipforge;
 
 import java.io.IOException;
-import java.io.InputStream;
 import java.nio.file.FileSystem;
 import java.nio.file.Files;
 import java.nio.file.StandardCopyOption;
@@ -16,7 +15,7 @@ class ZipFileVisitor implements Visitor {
 
     @Override
     public void visit(FileNode file) throws IOException {
-        try (InputStream content = file.content()) {
+        try (var content = file.content()) {
             Files.copy(content, zipFileSystem.getPath(file.path().toString()), StandardCopyOption.REPLACE_EXISTING);
         }
     }
@@ -25,7 +24,7 @@ public void visit(FileNode file) throws IOException {
     public void visit(DirectoryNode directory) throws IOException {
         Files.createDirectories(zipFileSystem.getPath(directory.path().toString()));
 
-        for (Node node : directory.children()) {
+        for (var node : directory.children()) {
             node.accept(this);
         }
     }

src/main/java/io/github/helpermethod/zipforge/ZipForge.java

@@ -5,14 +5,12 @@
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.net.URI;
-import java.nio.file.FileSystem;
 import java.nio.file.FileSystems;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.ArrayDeque;
 import java.util.Deque;
-import java.util.HashMap;
 import java.util.Map;
 
 public class ZipForge {
@@ -21,7 +19,7 @@ public class ZipForge {
     private ZipForge() {}
 
     public static Path createZipFile(Path path, NodeGroup nodeGroup) throws IOException {
-        DirectoryNode rootNode = new DirectoryNode(Paths.get(""));
+        var rootNode = new DirectoryNode(Paths.get(""));
 
         try {
             nodeDeque.get().addLast(rootNode);
@@ -30,10 +28,8 @@ public static Path createZipFile(Path path, NodeGroup nodeGroup) throws IOExcept
             nodeDeque.remove();
         }
 
-        Map<String, String> env = new HashMap<>();
-        env.put("create", "true");
-
-        try (FileSystem zipFileSystem = FileSystems.newFileSystem(URI.create("jar:" + path.toUri()), env)) {
+        try (var zipFileSystem =
+                FileSystems.newFileSystem(URI.create("jar:" + path.toUri()), Map.of("create", "true"))) {
             new ZipFileVisitor(zipFileSystem).visit(rootNode);
         }
 
@@ -57,7 +53,7 @@ public static void file(String name, Path content) {
     }
 
     public static void directory(String name, NodeGroup nodeGroup) {
-        DirectoryNode directoryNode = new DirectoryNode(path(name));
+        var directoryNode = new DirectoryNode(path(name));
         nodeDeque.get().getLast().directory(directoryNode);
 
         nodeDeque.get().addLast(directoryNode);