From a454150e7f9cb3aa2ea1ae1b4365ac7de475865e Mon Sep 17 00:00:00 2001
From: Joakim Erdfelt <joakim.erdfelt@gmail.com>
Date: Mon, 17 Oct 2022 15:19:32 -0500
Subject: [PATCH] Improved addClassPath and addJars behavior

+ Less code
+ Corrected javadoc
---
 .../jetty/ee9/webapp/WebAppClassLoader.java   | 45 ++++++-------------
 1 file changed, 13 insertions(+), 32 deletions(-)

diff --git a/jetty-ee9/jetty-ee9-webapp/src/main/java/org/eclipse/jetty/ee9/webapp/WebAppClassLoader.java b/jetty-ee9/jetty-ee9-webapp/src/main/java/org/eclipse/jetty/ee9/webapp/WebAppClassLoader.java
index fd2f858f44d..a6c221aec13 100644
--- a/jetty-ee9/jetty-ee9-webapp/src/main/java/org/eclipse/jetty/ee9/webapp/WebAppClassLoader.java
+++ b/jetty-ee9/jetty-ee9-webapp/src/main/java/org/eclipse/jetty/ee9/webapp/WebAppClassLoader.java
@@ -223,38 +223,20 @@ public class WebAppClassLoader extends URLClassLoader implements ClassVisibility
     }
 
     /**
-     * @param resource Comma or semicolon separated path of filenames or URLs
-     * pointing to directories or jar files. Directories should end
-     * with '/'.
+     * @param resources The resources to add to the classpath
      * @throws IOException if unable to add classpath from resource
      */
-    public void addClassPath(Resource resource)
+    public void addClassPath(Resource resources)
         throws IOException
     {
-        if (resource instanceof ResourceCollection)
+        for (Resource resource: resources)
         {
-            for (Resource r : ((ResourceCollection)resource).getResources())
-            {
-                addClassPath(r);
-            }
-        }
-        else
-        {
-            // Resolve file path if possible
-            Path path = resource.getPath();
-            if (path != null)
-            {
-                URL url = resource.getURI().toURL();
-                addURL(url);
-            }
-            else if (resource.isDirectory())
-            {
+            if (resource.exists())
                 addURL(resource.getURI().toURL());
-            }
             else
             {
                 if (LOG.isDebugEnabled())
-                    LOG.debug("Check file exists and is not nested jar: {}", resource);
+                    LOG.debug("Check resource exists and is not a nested jar: {}", resource);
                 throw new IllegalArgumentException("File not resolvable or incompatible with URLClassloader: " + resource);
             }
         }
@@ -273,11 +255,7 @@ public class WebAppClassLoader extends URLClassLoader implements ClassVisibility
             return;
 
         List<URI> uris = URIUtil.split(classPath);
-        ResourceCollection rc = _resourceFactory.newResource(uris);
-        for (Resource resource : rc.getResources())
-        {
-            addClassPath(resource);
-        }
+        addClassPath(_resourceFactory.newResource(uris));
     }
 
     /**
@@ -298,13 +276,16 @@ public class WebAppClassLoader extends URLClassLoader implements ClassVisibility
      * Add elements to the class path for the context from the jar and zip files found
      * in the specified resource.
      *
-     * @param lib the resource that contains the jar and/or zip files.
+     * @param libs the resource that contains the jar and/or zip files.
      */
-    public void addJars(Resource lib)
+    public void addJars(Resource libs)
     {
-        if (lib.exists() && lib.isDirectory())
+        if (libs == null || !libs.exists() || !libs.isDirectory())
+            return;
+
+        for (Resource libDir: libs)
         {
-            Path dir = lib.getPath();
+            Path dir = libDir.getPath();
 
             try (Stream<Path> streamEntries = Files.list(dir))
             {