feat: add resource implement

Signed-off-by: licho <lecho.sun@gmail.com>

dinky-common/src/main/java/org/dinky/classloader/DinkyClassLoader.java

@@ -22,11 +22,15 @@
 import org.dinky.context.FlinkUdfPathContextHolder;
 
 import java.io.File;
+import java.io.IOException;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLClassLoader;
 import java.net.URLStreamHandlerFactory;
+import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Enumeration;
+import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
 
@@ -111,20 +115,62 @@ protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundE
             if (loadedClass == null) {
                 try {
                     // try to use this classloader to load
-                    loadedClass = this.findClass(name);
+                    return findClass(name);
                 } catch (ClassNotFoundException e) {
                     // maybe is system class, try parents delegate
                     return super.loadClass(name, false);
                 }
-            }
-
-            if (resolve) {
+            }else if (resolve) {
                 resolveClass(loadedClass);
             }
             return loadedClass;
         }
     }
 
+    @Override
+    public URL getResource(String name) {
+        // first, try and find it via the URLClassloader
+        URL urlClassLoaderResource = findResource(name);
+
+        if (urlClassLoaderResource != null) {
+            return urlClassLoaderResource;
+        }
+
+        // delegate to super
+        return super.getResource(name);
+    }
+
+    @Override
+    public Enumeration<URL> getResources(String name) throws IOException {
+        // first get resources from URLClassloader
+        Enumeration<URL> urlClassLoaderResources = findResources(name);
+
+        final List<URL> result = new ArrayList<>();
+
+        while (urlClassLoaderResources.hasMoreElements()) {
+            result.add(urlClassLoaderResources.nextElement());
+        }
+
+        // get parent urls
+        Enumeration<URL> parentResources = getParent().getResources(name);
+
+        while (parentResources.hasMoreElements()) {
+            result.add(parentResources.nextElement());
+        }
+
+        return new Enumeration<URL>() {
+            Iterator<URL> iter = result.iterator();
+
+            public boolean hasMoreElements() {
+                return iter.hasNext();
+            }
+
+            public URL nextElement() {
+                return iter.next();
+            }
+        };
+    }
+
     public static List<File> getJarFiles(String[] paths, List<String> notExistsFiles) {
         List<File> result = new LinkedList<>();
         for (String path : paths) {
@@ -147,4 +193,8 @@ public static List<File> getJarFiles(String[] paths, List<String> notExistsFiles
         }
         return result;
     }
+
+    static {
+        ClassLoader.registerAsParallelCapable();
+    }
 }