multi-release-jar and refactor

benchmark/src/main/java/net/woggioni/jwo/benchmark/Main.java

@@ -4,8 +4,8 @@ import lombok.SneakyThrows;
 import net.woggioni.jwo.Chronometer;
 import net.woggioni.jwo.CollectionUtils;
 import net.woggioni.jwo.JWO;
-import net.woggioni.jwo.io.CircularInputStream;
-import net.woggioni.jwo.tuple.Tuple2;
+import net.woggioni.jwo.CircularInputStream;
+import net.woggioni.jwo.Tuple2;
 
 import java.io.InputStream;
 import java.io.InputStreamReader;

build.gradle

@@ -1,5 +1,6 @@
 plugins {
     id 'maven-publish'
+    id 'net.woggioni.plugins.multi-release-jar'
     id 'net.woggioni.gradle.lombok' apply false
 }
 
@@ -37,20 +38,12 @@ dependencies {
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
     withJavadocJar()
     withSourcesJar()
 }
 
-jar {
-    manifest{
-        attributes([
-            "Automatic-Module-Name": "net.woggioni.jwo"
-        ])
-    }
-}
-
 TaskProvider<Zip> pathClassLoaderTestBundleTask = tasks.register("pathClassLoaderTestBundle", Zip) {
     from(configurations.pathClassloaderTest)
     archiveBaseName = "pathClassLoaderTestBundle"

gradle.properties

@@ -1,4 +1,4 @@
-gradle.version = 7.1
+gradle.version = 7.1.1
 jwo.version=1.0
 junitJupiter.version=5.7.0
 lombok.version=1.18.16

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.1.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -72,7 +72,7 @@ case "`uname`" in
   Darwin* )
     darwin=true
     ;;
-  MINGW* )
+  MSYS* | MINGW* )
     msys=true
     ;;
   NONSTOP* )

settings.gradle

@@ -8,6 +8,7 @@ pluginManagement {
 
     plugins {
         id "net.woggioni.gradle.lombok" version "0.1"
+        id "net.woggioni.plugins.multi-release-jar" version "0.1"
     }
 }
 

src/main/java/net/woggioni/jwo/CircularBuffer.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.io;
+package net.woggioni.jwo;
 
 import lombok.SneakyThrows;
 

src/main/java/net/woggioni/jwo/CircularInputStream.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.io;
+package net.woggioni.jwo;
 
 import lombok.RequiredArgsConstructor;
 

src/main/java/net/woggioni/jwo/Hash.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.hash;
+package net.woggioni.jwo;
 
 import lombok.EqualsAndHashCode;
 import lombok.Getter;

src/main/java/net/woggioni/jwo/HttpClient.java

@@ -0,0 +1,125 @@
+package net.woggioni.jwo;
+
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.SneakyThrows;
+
+import javax.net.ssl.HttpsURLConnection;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLSocketFactory;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URL;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+public class HttpClient {
+
+    private SSLSocketFactory socketFactory;
+
+    public HttpClient() {}
+
+    public HttpClient(final SSLContext sslContext) {
+        socketFactory = sslContext.getSocketFactory();
+    }
+
+    @SneakyThrows
+    public HttpsURLConnection call(HttpRequest httpRequest) {
+        HttpsURLConnection conn = (HttpsURLConnection) httpRequest.url.openConnection();
+        if(socketFactory != null) {
+            conn.setSSLSocketFactory(socketFactory);
+        }
+        conn.setInstanceFollowRedirects(false);
+        conn.setRequestMethod(httpRequest.method.text);
+        httpRequest.headers.forEach((key, value) ->
+            value.forEach(headerValue -> conn.addRequestProperty(key, headerValue)));
+        switch (httpRequest.method) {
+            case PUT:
+            case POST:
+            case DELETE:
+                if (httpRequest.body != null) {
+                    conn.setDoOutput(true);
+                    byte[] buffer = new byte[1024];
+                    OutputStream os = conn.getOutputStream();
+                    while (true) {
+                        int read = httpRequest.body.read(buffer, 0, buffer.length);
+                        if (read < 0) break;
+                        os.write(buffer, 0, read);
+                    }
+                }
+                break;
+            case GET:
+            case HEAD:
+            case OPTIONS:
+                break;
+        }
+        return conn;
+    }
+
+    public enum HttpMethod {
+        PUT("PUT"),
+        GET("GET"),
+        POST("POST"),
+        DELETE("DELETE"),
+        HEAD("HEAD"),
+        OPTIONS("OPTIONS");
+
+        public final String text;
+
+        HttpMethod(String text) {
+            this.text = text;
+        }
+    }
+
+    public enum HttpStatus {
+        OK(200),
+        INTERNAL_SERVER_ERROR(500),
+        BAD_REQUEST(400),
+        UNAUTHORIZED(401),
+        FORBIDDEN(403),
+        NOT_FOUND(404),
+        CONFLICT(409);
+
+        public final int code;
+
+        HttpStatus(int code) {
+            this.code = code;
+        }
+    }
+
+    @Builder(builderMethodName = "privateBuilder", access = AccessLevel.PUBLIC)
+    public static class HttpRequest {
+
+        final URL url;
+
+        final HttpMethod method = HttpMethod.GET;
+
+        final Map<String, List<String>> headers = Collections.emptyMap();
+
+        final InputStream body = null;
+
+        public static HttpRequestBuilder builder(URL url) {
+            return HttpRequest.privateBuilder().url(url);
+        }
+
+        public static class Builder {
+            private final URL url;
+
+            private HttpMethod method = HttpMethod.GET;
+
+            private Map<String, List<String>> headers = Collections.emptyMap();
+
+            private InputStream body = null;
+
+            private Builder(URL url) {
+                this.url = url;
+            }
+
+            public Builder method(HttpMethod method) {
+                this.method = method;
+                return this;
+            }
+        }
+    }
+}

src/main/java/net/woggioni/jwo/JWO.java

@@ -2,7 +2,6 @@ package net.woggioni.jwo;
 
 import lombok.SneakyThrows;
 import lombok.extern.slf4j.Slf4j;
-import net.woggioni.jwo.tuple.Tuple2;
 
 import javax.net.ssl.*;
 import java.io.*;

src/main/java/net/woggioni/jwo/JarExtractorInputStream.java

@@ -1,6 +1,4 @@
-package net.woggioni.jwo.io;
-
-import net.woggioni.jwo.JWO;
+package net.woggioni.jwo;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -13,11 +11,10 @@ import java.util.jar.Manifest;
 import java.util.zip.ZipEntry;
 
 /**
- * Input stream that extract a jar archive in the provided {@param destination} while reading it
+ * Input stream that extract a jar archive in the provided destination while reading it
  */
-class JarExtractorInputStream extends JarInputStream {
+public class JarExtractorInputStream extends JarInputStream {
 
-    private final String sourceLocation;
     private final Path destination;
     private OutputStream currentFile = null;
 
@@ -26,7 +23,6 @@ class JarExtractorInputStream extends JarInputStream {
                                    boolean verify,
                                    String sourceLocation) throws IOException {
         super(source, verify);
-        this.sourceLocation = sourceLocation;
         this.destination = destination;
         Path newFileSystemLocation = destination.resolve(JarFile.MANIFEST_NAME);
         Files.createDirectories(newFileSystemLocation.getParent());

src/main/java/net/woggioni/jwo/LexicographicIterableComparator.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.collection;
+package net.woggioni.jwo;
 
 
 import java.util.Comparator;

src/main/java/net/woggioni/jwo/LookAheadInputStream.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.io;
+package net.woggioni.jwo;
 
 import lombok.SneakyThrows;
 

src/main/java/net/woggioni/jwo/LookAheadTextInputStream.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.io;
+package net.woggioni.jwo;
 
 import lombok.SneakyThrows;
 

src/main/java/net/woggioni/jwo/LruCache.java

@@ -1,8 +1,6 @@
-package net.woggioni.jwo.cache;
+package net.woggioni.jwo;
 
 import lombok.Getter;
-import net.woggioni.jwo.Chronometer;
-import net.woggioni.jwo.CollectionUtils;
 
 import java.util.*;
 import java.util.function.Function;

src/main/java/net/woggioni/jwo/MutableTuple2.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.tuple;
+package net.woggioni.jwo;
 
 import lombok.AllArgsConstructor;
 import lombok.EqualsAndHashCode;

src/main/java/net/woggioni/jwo/MutableTuple3.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.tuple;
+package net.woggioni.jwo;
 
 import lombok.AllArgsConstructor;
 import lombok.EqualsAndHashCode;

src/main/java/net/woggioni/jwo/NullInputStream.java

@@ -0,0 +1,11 @@
+package net.woggioni.jwo;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+public class NullInputStream extends InputStream {
+    @Override
+    public int read() throws IOException {
+        return -1;
+    }
+}

src/main/java/net/woggioni/jwo/NullOutputStream.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.io;
+package net.woggioni.jwo;
 
 import java.io.OutputStream;
 

src/main/java/net/woggioni/jwo/PathClassLoader.java

@@ -1,13 +1,17 @@
-package net.woggioni.jwo.loader;
+package net.woggioni.jwo;
 
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
 import lombok.SneakyThrows;
 
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URI;
 import java.net.URL;
-import java.nio.file.FileVisitResult;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.SimpleFileVisitor;
+import java.net.URLConnection;
+import java.net.URLStreamHandler;
+import java.nio.file.*;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.*;
 
@@ -94,4 +98,63 @@ public final class PathClassLoader extends ClassLoader {
     private static URL toURL(Path path) throws IOException {
         return new URL(null, path.toUri().toString(), PathURLStreamHandler.INSTANCE);
     }
+
+    private static final class PathURLConnection extends URLConnection {
+
+        private final Path path;
+
+        PathURLConnection(URL url, Path path) {
+            super(url);
+            this.path = path;
+        }
+
+        @Override
+        public void connect() {}
+
+        @Override
+        public long getContentLengthLong() {
+            try {
+                return Files.size(this.path);
+            } catch (IOException e) {
+                throw new RuntimeException("could not get size of: " + this.path, e);
+            }
+        }
+
+        @Override
+        public InputStream getInputStream() throws IOException {
+            return Files.newInputStream(this.path);
+        }
+
+        @Override
+        public OutputStream getOutputStream() throws IOException {
+            return Files.newOutputStream(this.path);
+        }
+
+        @Override
+        @SneakyThrows
+        public String getContentType() {
+            return Files.probeContentType(this.path);
+        }
+
+        @Override
+        @SneakyThrows
+        public long getLastModified() {
+            BasicFileAttributes attributes = Files.readAttributes(this.path, BasicFileAttributes.class);
+            return attributes.lastModifiedTime().toMillis();
+        }
+    }
+
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    private static final class PathURLStreamHandler extends URLStreamHandler {
+
+        static final URLStreamHandler INSTANCE = new PathURLStreamHandler();
+
+        @Override
+        @SneakyThrows
+        protected URLConnection openConnection(URL url) {
+            URI uri = url.toURI();
+            Path path = Paths.get(uri);
+            return new PathURLConnection(url, path);
+        }
+    }
 }

src/main/java/net/woggioni/jwo/SignatureCollector.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.signing;
+package net.woggioni.jwo;
 
 import java.security.CodeSigner;
 import java.security.PublicKey;

src/main/java/net/woggioni/jwo/TreeNodeVisitor.java

@@ -1,5 +1,6 @@
-package net.woggioni.jwo.tree;
+package net.woggioni.jwo;
 
+import java.util.Iterator;
 import java.util.List;
 
 /**
@@ -13,7 +14,35 @@ import java.util.List;
  * The last element of the list corresponds to the node currently being traversed.
  * @param <T> the type of the context object used
  */
-public interface TreeNodeVisitor<NODE extends TreeNode<NODE>, T> {
+public interface TreeNodeVisitor<NODE extends TreeNodeVisitor.TreeNode<NODE>, T> {
+
+    interface TreeNode<NODE extends TreeNode> {
+        Iterator<NODE> children();
+    }
+
+    /**
+     * This interface exposes the methods that are visible to the user of
+     * {@link TreeWalker}, it allows to
+     * set/get a custom object in the current stack context or to get the current link's Aci
+     * @param <T> the type of the context object used
+     */
+    interface StackContext<NODE extends TreeNode, T> {
+
+        /**
+         * @param ctx the user object to set for this stack level
+         */
+        void setContext(T ctx);
+
+        /**
+         * @return the current user object
+         */
+        T getContext();
+
+        /**
+         * @return the current TreeNode
+         */
+        NODE getNode();
+    }
 
     enum VisitOutcome {
         CONTINUE, SKIP, EARLY_EXIT

src/main/java/net/woggioni/jwo/TreeWalker.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.tree;
+package net.woggioni.jwo;
 
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
@@ -13,10 +13,10 @@ import static net.woggioni.jwo.JWO.pop;
 import static net.woggioni.jwo.JWO.tail;
 
 @RequiredArgsConstructor
-public class TreeWalker<NODE extends TreeNode<NODE>, T> {
+public class TreeWalker<NODE extends TreeNodeVisitor.TreeNode<NODE>, T> {
 
     @RequiredArgsConstructor
-    private static class StackElement<NODE extends TreeNode<NODE>, T> implements StackContext<NODE, T> {
+    private static class StackElement<NODE extends TreeNodeVisitor.TreeNode<NODE>, T> implements TreeNodeVisitor.StackContext<NODE, T> {
 
         @Getter
         final NODE node;
@@ -39,7 +39,7 @@ public class TreeWalker<NODE extends TreeNode<NODE>, T> {
         List<StackElement<NODE, T>> stack = new ArrayList<>();
         StackElement<NODE, T> rootStackElement = new StackElement<>(root);
         stack.add(rootStackElement);
-        List<StackContext<NODE, T>> publicStack = Collections.unmodifiableList(stack);
+        List<TreeNodeVisitor.StackContext<NODE, T>> publicStack = Collections.unmodifiableList(stack);
         switch (visitor.visitPre(publicStack)) {
             case CONTINUE:
                 rootStackElement.childrenIterator = root.children();

src/main/java/net/woggioni/jwo/Tuple2.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.tuple;
+package net.woggioni.jwo;
 
 import lombok.EqualsAndHashCode;
 import lombok.RequiredArgsConstructor;

src/main/java/net/woggioni/jwo/Tuple3.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.tuple;
+package net.woggioni.jwo;
 
 import lombok.EqualsAndHashCode;
 import lombok.RequiredArgsConstructor;

src/main/java/net/woggioni/jwo/UncloseableInputStream.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.io;
+package net.woggioni.jwo;
 
 import java.io.FilterInputStream;
 import java.io.InputStream;

src/main/java/net/woggioni/jwo/UncloseableOutputStream.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.io;
+package net.woggioni.jwo;
 
 import java.io.FilterOutputStream;
 import java.io.OutputStream;

src/main/java/net/woggioni/jwo/ZipExtractorInputStream.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.io;
+package net.woggioni.jwo;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -9,9 +9,9 @@ import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
 /**
- * Input stream that extract a zip archive in the provided {@param destination} while reading it
+ * Input stream that extract a zip archive in the provided destination while reading it
  */
-class ZipExtractorInputStream extends ZipInputStream {
+public class ZipExtractorInputStream extends ZipInputStream {
 
     public ZipExtractorInputStream(InputStream source, Path destination) {
         super(source);

src/main/java/net/woggioni/jwo/http/HttpClient.java

@@ -1,52 +0,0 @@
-package net.woggioni.jwo.http;
-
-import lombok.SneakyThrows;
-
-import javax.net.ssl.HttpsURLConnection;
-import javax.net.ssl.SSLContext;
-import javax.net.ssl.SSLSocketFactory;
-import java.io.OutputStream;
-
-public class HttpClient {
-
-    private SSLSocketFactory socketFactory;
-
-    public HttpClient() {}
-
-    public HttpClient(final SSLContext sslContext) {
-        socketFactory = sslContext.getSocketFactory();
-    }
-
-    @SneakyThrows
-    public HttpsURLConnection call(HttpRequest httpRequest) {
-        HttpsURLConnection conn = (HttpsURLConnection) httpRequest.url.openConnection();
-        if(socketFactory != null) {
-            conn.setSSLSocketFactory(socketFactory);
-        }
-        conn.setInstanceFollowRedirects(false);
-        conn.setRequestMethod(httpRequest.method.text);
-        httpRequest.headers.forEach((key, value) ->
-            value.forEach(headerValue -> conn.addRequestProperty(key, headerValue)));
-        switch (httpRequest.method) {
-            case PUT:
-            case POST:
-            case DELETE:
-                if (httpRequest.body != null) {
-                    conn.setDoOutput(true);
-                    byte[] buffer = new byte[1024];
-                    OutputStream os = conn.getOutputStream();
-                    while (true) {
-                        int read = httpRequest.body.read(buffer, 0, buffer.length);
-                        if (read < 0) break;
-                        os.write(buffer, 0, read);
-                    }
-                }
-                break;
-            case GET:
-            case HEAD:
-            case OPTIONS:
-                break;
-        }
-        return conn;
-    }
-}

src/main/java/net/woggioni/jwo/http/HttpMethod.java

@@ -1,16 +0,0 @@
-package net.woggioni.jwo.http;
-
-public enum HttpMethod {
-    PUT("PUT"),
-    GET("GET"),
-    POST("POST"),
-    DELETE("DELETE"),
-    HEAD("HEAD"),
-    OPTIONS("OPTIONS");
-
-    public final String text;
-
-    HttpMethod(String text) {
-        this.text = text;
-    }
-}

src/main/java/net/woggioni/jwo/http/HttpRequest.java

@@ -1,46 +0,0 @@
-package net.woggioni.jwo.http;
-
-import lombok.AccessLevel;
-import lombok.Builder;
-
-import java.io.InputStream;
-import java.net.URL;
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
-
-@Builder(builderMethodName = "privateBuilder", access = AccessLevel.PUBLIC)
-public class HttpRequest {
-
-    final URL url;
-
-    final HttpMethod method = HttpMethod.GET;
-
-    final Map<String, List<String>> headers = Collections.emptyMap();
-
-    final InputStream body = null;
-
-    public static HttpRequestBuilder builder(URL url) {
-        return HttpRequest.privateBuilder().url(url);
-    }
-
-    public static class Builder {
-        private final URL url;
-
-        private HttpMethod method = HttpMethod.GET;
-
-        private Map<String, List<String>> headers = Collections.emptyMap();
-
-        private InputStream body = null;
-
-        private Builder(URL url) {
-            this.url = url;
-        }
-
-        public Builder method(HttpMethod method) {
-            this.method = method;
-            return this;
-        }
-    }
-}
-

src/main/java/net/woggioni/jwo/http/HttpStatus.java

@@ -1,17 +0,0 @@
-package net.woggioni.jwo.http;
-
-public enum HttpStatus {
-    OK(200),
-    INTERNAL_SERVER_ERROR(500),
-    BAD_REQUEST(400),
-    UNAUTHORIZED(401),
-    FORBIDDEN(403),
-    NOT_FOUND(404),
-    CONFLICT(409);
-
-    public final int code;
-
-    HttpStatus(int code) {
-        this.code = code;
-    }
-}

src/main/java/net/woggioni/jwo/loader/PathURLConnection.java

@@ -1,57 +0,0 @@
-package net.woggioni.jwo.loader;
-
-import lombok.SneakyThrows;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.net.URL;
-import java.net.URLConnection;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.attribute.BasicFileAttributes;
-
-final class PathURLConnection extends URLConnection {
-
-    private final Path path;
-
-    PathURLConnection(URL url, Path path) {
-        super(url);
-        this.path = path;
-    }
-
-    @Override
-    public void connect() {}
-
-    @Override
-    public long getContentLengthLong() {
-        try {
-            return Files.size(this.path);
-        } catch (IOException e) {
-            throw new RuntimeException("could not get size of: " + this.path, e);
-        }
-    }
-
-    @Override
-    public InputStream getInputStream() throws IOException {
-        return Files.newInputStream(this.path);
-    }
-
-    @Override
-    public OutputStream getOutputStream() throws IOException {
-        return Files.newOutputStream(this.path);
-    }
-
-    @Override
-    @SneakyThrows
-    public String getContentType() {
-        return Files.probeContentType(this.path);
-    }
-
-    @Override
-    @SneakyThrows
-    public long getLastModified() {
-        BasicFileAttributes attributes = Files.readAttributes(this.path, BasicFileAttributes.class);
-        return attributes.lastModifiedTime().toMillis();
-    }
-}

src/main/java/net/woggioni/jwo/loader/PathURLStreamHandler.java

@@ -1,26 +0,0 @@
-package net.woggioni.jwo.loader;
-
-import lombok.AccessLevel;
-import lombok.NoArgsConstructor;
-import lombok.SneakyThrows;
-
-import java.net.URI;
-import java.net.URL;
-import java.net.URLConnection;
-import java.net.URLStreamHandler;
-import java.nio.file.Path;
-import java.nio.file.Paths;
-
-@NoArgsConstructor(access = AccessLevel.PRIVATE)
-final class PathURLStreamHandler extends URLStreamHandler {
-
-    static final URLStreamHandler INSTANCE = new PathURLStreamHandler();
-
-    @Override
-    @SneakyThrows
-    protected URLConnection openConnection(URL url) {
-        URI uri = url.toURI();
-        Path path = Paths.get(uri);
-        return new PathURLConnection(url, path);
-    }
-}

src/main/java/net/woggioni/jwo/tree/StackContext.java

@@ -1,25 +0,0 @@
-package net.woggioni.jwo.tree;
-
-/**
- * This interface exposes the methods that are visible to the user of
- * {@link TreeWalker}, it allows to
- * set/get a custom object in the current stack context or to get the current link's Aci
- * @param <T> the type of the context object used
- */
-public interface StackContext<NODE extends TreeNode, T> {
-
-    /**
-     * @param ctx the user object to set for this stack level
-     */
-    void setContext(T ctx);
-
-    /**
-     * @return the current user object
-     */
-    T getContext();
-
-    /**
-     * @return the current TreeNode
-     */
-    NODE getNode();
-}

src/main/java/net/woggioni/jwo/tree/TreeNode.java

@@ -1,7 +0,0 @@
-package net.woggioni.jwo.tree;
-
-import java.util.Iterator;
-
-public interface TreeNode<NODE extends TreeNode> {
-    Iterator<NODE> children();
-}

src/main/java9/module-info.java

@@ -0,0 +1,3 @@
+module net.woggioni.jwo {
+    exports net.woggioni.jwo;
+}

src/test/java/net/woggioni/jwo/CircularBufferTest.java

@@ -1,6 +1,7 @@
-package net.woggioni.jwo.io;
+package net.woggioni.jwo;
 
 import lombok.SneakyThrows;
+import net.woggioni.jwo.CircularBuffer;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 

src/test/java/net/woggioni/jwo/ExtractorInputStreamTest.java

@@ -1,8 +1,6 @@
-package net.woggioni.jwo.io;
+package net.woggioni.jwo;
 
 import lombok.SneakyThrows;
-import net.woggioni.jwo.JWO;
-import net.woggioni.jwo.hash.Hash;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -18,7 +16,6 @@ import java.util.NavigableMap;
 import java.util.Objects;
 import java.util.TreeMap;
 import java.util.function.Consumer;
-import java.util.function.Predicate;
 import java.util.function.Supplier;
 import java.util.jar.JarFile;
 import java.util.jar.Manifest;
@@ -26,15 +23,13 @@ import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
 public class ExtractorInputStreamTest {
-    private Path testDir;
     private Path testJar;
     private Path referenceExtractionDestination;
     private Path testExtractionDestination;
 
     @BeforeEach
     void setup(@TempDir Path testDir) {
-        this.testDir = testDir;
-        testJar = Path.of(System.getProperty("junit.jupiter.engine.jar"));
+        testJar = Paths.get(System.getProperty("junit.jupiter.engine.jar"));
         referenceExtractionDestination = testDir.resolve("referenceExtraction");
         testExtractionDestination = testDir.resolve("testExtraction");
     }
@@ -45,7 +40,7 @@ public class ExtractorInputStreamTest {
         try(FileSystem fs = FileSystems.newFileSystem(source, null)) {
             for(Path root : fs.getRootDirectories()) {
                 Files.walk(root)
-                        .filter(Predicate.not(Files::isDirectory)).forEach(new Consumer<Path>() {
+                        .filter(it -> !Files.isDirectory(it)).forEach(new Consumer<Path>() {
                     @Override
                     @SneakyThrows
                     public void accept(Path path) {
@@ -62,7 +57,7 @@ public class ExtractorInputStreamTest {
     private static NavigableMap<String, Hash> hashFileTree(Path tree) {
         NavigableMap<String, Hash> result = new TreeMap<>();
         byte[] buffer = new byte[0x1000];
-        FileVisitor<Path> visitor = new SimpleFileVisitor<>() {
+        FileVisitor<Path> visitor = new SimpleFileVisitor<Path>() {
             @Override
             public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                 String key = tree.relativize(file).toString();

src/test/java/net/woggioni/jwo/HashTest.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.hash;
+package net.woggioni.jwo;
 
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeEach;

src/test/java/net/woggioni/jwo/LexicographicIterableComparatorTest.java

@@ -1,4 +1,4 @@
-package net.woggioni.jwo.collection;
+package net.woggioni.jwo;
 
 import org.junit.jupiter.api.Test;
 

src/test/java/net/woggioni/jwo/LruCacheTest.java

@@ -1,8 +1,7 @@
-package net.woggioni.jwo.cache;
+package net.woggioni.jwo;
 
 import lombok.EqualsAndHashCode;
 import lombok.SneakyThrows;
-import net.woggioni.jwo.JWO;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;

src/test/java/net/woggioni/jwo/PathClassLoaderTest.java

@@ -1,6 +1,7 @@
-package net.woggioni.jwo.loader;
+package net.woggioni.jwo;
 
 import lombok.SneakyThrows;
+import net.woggioni.jwo.PathClassLoader;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 

src/test/java/net/woggioni/jwo/TreeWalkerTest.java

@@ -1,8 +1,7 @@
-package net.woggioni.jwo.tree;
+package net.woggioni.jwo;
 
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
-import net.woggioni.jwo.tuple.Tuple2;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
@@ -12,7 +11,7 @@ import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 @RequiredArgsConstructor
-class Node implements TreeNode<Node> {
+class Node implements TreeNodeVisitor.TreeNode<Node> {
     @Getter
     private final Integer id;
     private final List<Node> children;