/*
 * This file is part of FastClasspathScanner.
 * 
 * Author: Luke Hutchison
 * 
 * Hosted at: https://github.com/lukehutch/fast-classpath-scanner
 * 
 * --
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2016 Luke Hutchison
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without
 * limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or substantial
 * portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
 * LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
 * EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
 * OR OTHER DEALINGS IN THE SOFTWARE.
 */
package io.github.lukehutch.fastclasspathscanner.classloaderhandler;

import java.util.List;

import io.github.lukehutch.fastclasspathscanner.scanner.ClasspathFinder;
import io.github.lukehutch.fastclasspathscanner.scanner.ScanSpec;
import io.github.lukehutch.fastclasspathscanner.utils.LogNode;
import io.github.lukehutch.fastclasspathscanner.utils.ReflectionUtils;

/**
 * A basic ClassLoaderHandler that is able to extract the URLs from Java 9+ classloaders.
 * 
 * N.B. does not honor Java 9 module module encapsulation rules.
 */
public class Java9ClassLoaderHandler implements ClassLoaderHandler {
    public static final String[] HANDLED_CLASSLOADERS = { //
            "jdk.internal.loader.ClassLoaders$AppClassLoader", //
            "jdk.internal.loader.BuiltinClassLoader" //
    };

    @Override
    public DelegationOrder getDelegationOrder(final ClassLoader classLoaderInstance) {
        return DelegationOrder.PARENT_FIRST;
    }

    @Override
    public void handle(final ClassLoader classLoader, final ClasspathFinder classpathFinder,
            final ScanSpec scanSpec, final LogNode log) {
        // Type URLClassPath
        final Object ucp = ReflectionUtils.getFieldVal(classLoader, "ucp", false);
        if (ucp != null) {
            // A list of classpath element URL strings.
            // TODO: each URL element can add additional URL elements through the module-info mechanism,
            // so the URLClassPath class has a stack of opened URLs (and opening a URL can push more
            // URLs onto the stack). Currently the manifest's Class-Path mechanism works in a similar
            // way, but this should be abstracted to work with classloading too. Or alternatively,
            // maybe the Java 9 module loader should simply be queried when running under Java 9.
            @SuppressWarnings("unchecked")
            final List<String> path = (List<String>) ReflectionUtils.getFieldVal(ucp, "path", false);
            if (path != null) {
                for (final String pathElt : path) {
                    classpathFinder.addClasspathElement(pathElt, classLoader, log);
                }
            }
        }
    }
}

@@ -1367,32 +1367,8 @@
 r;%0A%0A
-import java.util.List;%0A%0A
 impo
@@ -1436,16 +1436,16 @@
 Finder;%0A
+
 import i
@@ -1568,79 +1568,8 @@
 ode;
-%0Aimport io.github.lukehutch.fastclasspathscanner.utils.ReflectionUtils;
 %0A%0A/*
@@ -2307,24 +2307,275 @@
 Node log) %7B%0A
+        %0A        // TODO: These fields cannot be queried, because Java 9 strictly enforces encapsulation:%0A        // https://stackoverflow.com/a/41265267%0A        // The JRE still seems to honor java.class.path for non-modular code.%0A        %0A        //
         // T
@@ -2591,16 +2591,26 @@
 assPath%0A
+        //
         
@@ -2676,32 +2676,42 @@
  %22ucp%22, false);%0A
+        //
         if (ucp 
@@ -2713,32 +2713,42 @@
 (ucp != null) %7B%0A
+        //
             // A
@@ -2787,16 +2787,26 @@
 trings.%0A
+        //
         
@@ -2906,24 +2906,30 @@
 sm,%0A    
+    //
         
 // so th
@@ -2920,16 +2920,20 @@
         
+    
 // so th
@@ -3015,16 +3015,24 @@
  more%0A  
+      //
         
@@ -3033,16 +3033,18 @@
         
+  
 // URLs 
@@ -3125,16 +3125,26 @@
 similar%0A
+        //
         
@@ -3234,16 +3234,26 @@
 tively,%0A
+        //
         
@@ -3342,16 +3342,26 @@
 Java 9.%0A
+        //
         
@@ -3395,16 +3395,26 @@
 ecked%22)%0A
+        //
         
@@ -3504,24 +3504,33 @@
 %22, false);%0A 
+       //
            i
@@ -3524,24 +3524,25 @@
 /           
+ 
 if (path != 
@@ -3541,32 +3541,42 @@
 path != null) %7B%0A
+        //
                 
@@ -3611,32 +3611,34 @@
 path) %7B%0A        
+//
             clas
@@ -3633,16 +3633,24 @@
         
+        
 classpat
@@ -3706,24 +3706,29 @@
  log);%0A     
+   //
            %7D
@@ -3730,24 +3730,49 @@
     
-%7D%0A            %7D%0A
+     %7D%0A        //            %7D%0A        //
     

Comment out non-working code