/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2015 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed 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.wildfly.security.util;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.ServiceConfigurationError;
import java.util.ServiceLoader;
import java.util.function.Supplier;

import org.wildfly.security.util._private.Arrays2;

/**
 * A supplier which uses a service loader to find all instances of the given service, and return them as an array.  The
 * result is then cached.
 *
 * @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a>
 */
public class ServiceLoaderSupplier<E> implements Supplier<E[]> {

    private final Class<E> service;
    private final ClassLoader classLoader;
    private int hashCode;
    private volatile E[] result;

    public ServiceLoaderSupplier(final Class<E> service, final ClassLoader classLoader) {
        this.service = service;
        this.classLoader = classLoader;
    }

    public E[] get() {
        if (result == null) {
            synchronized (this) {
                if (result == null) {
                    ArrayList<E> list = new ArrayList<>();
                    ServiceLoader<E> loader = ServiceLoader.load(service, classLoader);
                    Iterator<E> iterator = loader.iterator();
                    for (;;) try {
                        if (! iterator.hasNext()) {
                            return (result = list.toArray(Arrays2.createArray(service, list.size()))).clone();
                        }
                        list.add(iterator.next());
                    } catch (ServiceConfigurationError ignored) {}
                }
            }
        }
        return result.clone();
    }

    public int hashCode() {
        int hc = hashCode;
        if (hc == 0) {
            hc = service.hashCode() * 19 + classLoader.hashCode();
            if (hc == 0) hc = 1;
            return hashCode = hc;
        }
        return hc;
    }

    public boolean equals(final Object obj) {
        return obj instanceof ServiceLoaderSupplier && equals((ServiceLoaderSupplier<?>) obj);
    }

    private boolean equals(final ServiceLoaderSupplier<?> other) {
        return other == this || other.service == service && other.classLoader == classLoader;
    }
}

@@ -737,16 +737,249 @@
 .util;%0A%0A
+import org.wildfly.security.manager.WildFlySecurityManager;%0Aimport org.wildfly.security.util._private.Arrays2;%0A%0Aimport java.security.AccessControlContext;%0Aimport java.security.AccessController;%0Aimport java.security.PrivilegedAction;%0A
 import j
@@ -1142,60 +1142,8 @@
 r;%0A%0A
-import org.wildfly.security.util._private.Arrays2;%0A%0A
 /**%0A
@@ -1568,16 +1568,60 @@
  result;
+%0A    private final AccessControlContext acc;
 %0A%0A    pu
@@ -1772,24 +1772,75 @@
 lassLoader;%0A
+        this.acc = AccessController.getContext() ;%0A
     %7D%0A%0A    p
@@ -1963,32 +1963,504 @@
 ) %7B%0A            
+        if (WildFlySecurityManager.isChecking()) %7B%0A                        result = AccessController.doPrivileged((PrivilegedAction%3CE%5B%5D%3E) () -%3E loadServices(service, classLoader), acc);%0A                    %7D else %7B%0A                        result = loadServices(service, classLoader);%0A                    %7D%0A                %7D%0A            %7D%0A        %7D%0A        return result.clone();%0A    %7D%0A%0A    private E%5B%5D loadServices(final Class%3CE%3E service, final ClassLoader classLoader) %7B%0A
         ArrayLis
@@ -2486,36 +2486,24 @@
 ayList%3C%3E();%0A
-            
         Serv
@@ -2562,36 +2562,24 @@
 assLoader);%0A
-            
         Iter
@@ -2612,36 +2612,24 @@
 iterator();%0A
-            
         for 
@@ -2647,36 +2647,24 @@
             
-     
-       
 if (! iterat
@@ -2699,36 +2699,14 @@
     
-            return (result =
+return
  lis
@@ -2761,56 +2761,24 @@
 ()))
-).clone();%0A                        %7D%0A           
+;%0A            %7D%0A
     
@@ -2785,17 +2785,16 @@
         
- 
 list.add
@@ -2812,28 +2812,16 @@
 ext());%0A
-            
         
@@ -2865,17 +2865,16 @@
 nored) %7B
-%7D
 %0A       
@@ -2882,68 +2882,39 @@
     
-    %7D%0A            %7D%0A        %7D%0A        return result.clone();
+// explicitly ignored%0A        %7D
 %0A   

Allow ServiceLoaderSupplier to load services in a privileged block