1 files changed, 18 insertions, 0 deletions
diff --git a/bundle-plugin/src/main/java/com/yahoo/container/plugin/util/JarFiles.java b/bundle-plugin/src/main/java/com/yahoo/container/plugin/util/JarFiles.java
index 72d2adae13e..ade8a4984e8 100644
--- a/bundle-plugin/src/main/java/com/yahoo/container/plugin/util/JarFiles.java
+++ b/bundle-plugin/src/main/java/com/yahoo/container/plugin/util/JarFiles.java
@@ -3,6 +3,9 @@ package com.yahoo.container.plugin.util;
 
 import java.io.File;
 import java.io.InputStream;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
 import java.util.Optional;
 import java.util.jar.JarFile;
 import java.util.jar.Manifest;
@@ -14,6 +17,17 @@ import java.util.zip.ZipFile;
  * @author ollivir
  */
 public class JarFiles {
+
+    public static List<ProvidedArtifact> providedArtifactsFromClassPath(File jarFile) {
+        return getManifest(jarFile).map(mf -> getMainAttributeValue(mf, "Class-Path")
+                        .map(s -> Arrays.stream(s.split(" "))
+                                .map(ProvidedArtifact::fromStringValue)
+                                .toList())
+                        .orElse(Collections.emptyList()))
+                .orElse(Collections.emptyList());
+
+    }
+
     public static <T> T withJarFile(File file, ThrowingFunction<JarFile, T> action) {
         try (JarFile jar = new JarFile(file)) {
             return action.apply(jar);
@@ -30,6 +44,10 @@ public class JarFiles {
         }
     }
 
+    public static Optional<String> getMainAttributeValue(Manifest manifest, String attributeName) {
+        return Optional.ofNullable(manifest.getMainAttributes().getValue(attributeName));
+    }
+
     public static Optional<Manifest> getManifest(File jarFile) {
         return withJarFile(jarFile, jar -> Optional.ofNullable(jar.getManifest()));
     }