/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.beam.agent;

import java.lang.instrument.Instrumentation;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

public class OpenModuleAgent {
  public static void premain(String argument, Instrumentation instrumentation) {
    Set<Module> automaticModules = new HashSet<>();
    Set<Module> modulesToOpen = new HashSet<>();
    ModuleLayer.boot()
        .modules()
        .forEach(
            module -> {
              if (module.getDescriptor().isAutomatic()) {
                automaticModules.add(module);
              } else if (!module.getDescriptor().isOpen()) {
                modulesToOpen.add(module);
              }
            });
    for (Module module : modulesToOpen) {
      Map<String, Set<Module>> addOpens = new HashMap<>();
      for (String pkg : module.getPackages()) {
        addOpens.put(pkg, automaticModules);
      }
      instrumentation.redefineModule(
          module,
          Collections.emptySet(),
          Collections.emptyMap(),
          addOpens,
          Collections.emptySet(),
          Collections.emptyMap());
    }
  }
}

@@ -1540,16 +1540,58 @@
     %7D);%0A
+%0A    if (!automaticModules.isEmpty()) %7B%0A  
     for 
@@ -1620,24 +1620,26 @@
 esToOpen) %7B%0A
+  
       Map%3CSt
@@ -1687,24 +1687,26 @@
 %3C%3E();%0A      
+ 
+ 
 for (String 
@@ -1735,32 +1735,34 @@
 es()) %7B%0A        
+  
 addOpens.put(pkg
@@ -1782,16 +1782,18 @@
 dules);%0A
+  
       %7D%0A
@@ -1798,16 +1798,18 @@
 %7D%0A      
+  
 instrume
@@ -1832,16 +1832,18 @@
 Module(%0A
+  
         
@@ -1854,32 +1854,34 @@
 dule,%0A          
+  
 Collections.empt
@@ -1880,32 +1880,34 @@
 ons.emptySet(),%0A
+  
           Collec
@@ -1926,32 +1926,34 @@
 ap(),%0A          
+ 
+ 
 addOpens,%0A      
@@ -1946,16 +1946,18 @@
 dOpens,%0A
+  
         
@@ -1984,32 +1984,34 @@
 et(),%0A          
+ 
+ 
 Collections.empt
@@ -2019,16 +2019,24 @@
 Map());%0A
+      %7D%0A
     %7D%0A  

check for empty