[FEATURE] Методы работы с Jar(JarHelper)

libLauncher/src/main/java/ru/gravit/utils/helper/JarHelper.java

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+package ru.gravit.utils.helper;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.jar.JarInputStream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+public class JarHelper {
+    @FunctionalInterface
+    interface ZipWalkCallback
+    {
+        void process(ZipInputStream input, ZipEntry e);
+    }
+    @FunctionalInterface
+    interface JarWalkCallback
+    {
+        void process(ZipInputStream input, ZipEntry e, String fullClassName, String clazz);
+    }
+    public static void zipWalk(ZipInputStream input, ZipWalkCallback callback) throws IOException
+    {
+        ZipEntry e = input.getNextEntry();
+        while (e != null)
+        {
+            callback.process(input, e);
+            e = input.getNextEntry();
+        }
+    }
+    public static void jarWalk(JarInputStream input, JarWalkCallback callback) throws IOException
+    {
+        zipWalk(input, (in, e) -> {
+            String filename = e.getName();
+            if(filename.endsWith(".class"))
+            {
+                String classFull = filename.replaceAll("/", ".").substring(0,
+                        filename.length() - ".class".length());
+                String clazz = classFull.substring(classFull.lastIndexOf('.'));
+                callback.process(in,e, classFull, clazz);
+            }
+        });
+    }
+    public static Map<String, String> jarMap(JarInputStream input, boolean overwrite) throws IOException
+    {
+        Map<String, String> map = new HashMap<>();
+        jarMap(input, map, overwrite);
+        return map;
+    }
+    public static void jarMap(JarInputStream input, Map<String, String> map, boolean overwrite) throws IOException
+    {
+        jarWalk(input, (in, e, classFull, clazz) -> {
+            if(overwrite) map.put(clazz, classFull);
+            else map.putIfAbsent(clazz, classFull);
+        });
+    }
+    public static Map<String, String> jarMap(Path file, boolean overwrite) throws IOException
+    {
+        try(JarInputStream inputStream = new JarInputStream(IOHelper.newZipInput(file)))
+        {
+            return jarMap(inputStream,overwrite);
+        }
+    }
+    public static void jarMap(Path file, Map<String, String> map, boolean overwrite) throws IOException
+    {
+        try(JarInputStream inputStream = new JarInputStream(IOHelper.newZipInput(file)))
+        {
+            jarMap(inputStream, map,overwrite);
+        }
+    }
+    public static Map<String, String> jarMap(Class clazz, boolean overwrite) throws IOException
+    {
+        Path file = IOHelper.getCodeSource(clazz);
+        return jarMap(file, overwrite);
+    }
+    public static void jarMap(Class clazz, Map<String, String> map, boolean overwrite) throws IOException
+    {
+        Path file = IOHelper.getCodeSource(clazz);
+        jarMap(file, map, overwrite);
+    }
+}