1 files changed, 90 insertions, 0 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/model/adapter/AccessControlProviderFactory.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/model/adapter/AccessControlProviderFactory.java
new file mode 100644
index 0000000000..6cdf2f2c1a
--- /dev/null
+++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/model/adapter/AccessControlProviderFactory.java
@@ -0,0 +1,90 @@
+/*
+ *
+ * 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.qpid.server.model.adapter;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+import org.apache.qpid.server.model.AccessControlProvider;
+import org.apache.qpid.server.model.Broker;
+import org.apache.qpid.server.plugin.AccessControlFactory;
+import org.apache.qpid.server.plugin.QpidServiceLoader;
+import org.apache.qpid.server.security.AccessControl;
+
+public class AccessControlProviderFactory
+{
+    private final Iterable<AccessControlFactory> _factories;
+    private Collection<String> _supportedAcessControlProviders;
+
+    public AccessControlProviderFactory(QpidServiceLoader<AccessControlFactory> accessControlFactoryServiceLoader)
+    {
+        _factories = accessControlFactoryServiceLoader.instancesOf(AccessControlFactory.class);
+        List<String> supportedAccessControlProviders = new ArrayList<String>();
+        for (AccessControlFactory factory : _factories)
+        {
+            supportedAccessControlProviders.add(factory.getType());
+        }
+        _supportedAcessControlProviders = Collections.unmodifiableCollection(supportedAccessControlProviders);
+    }
+
+    /**
+     * Creates {@link AccessControlProvider} for given ID, {@link Broker} and attributes.
+     * <p>
+     * The configured {@link AccessControlFactory}'s are used to try to create the {@link AccessControlProvider}.
+     * The first non-null instance is returned. The factories are used in non-deterministic order.
+     */
+    public AccessControlProvider create(UUID id, Broker broker, Map<String, Object> attributes)
+    {
+        AccessControlProvider ac = createAccessControlProvider(id, broker, attributes);
+        ac.getAccessControl().onCreate();
+
+        return ac;
+    }
+
+    public AccessControlProvider recover(UUID id, Broker broker, Map<String, Object> attributes)
+    {
+        return createAccessControlProvider(id, broker, attributes);
+    }
+
+    private AccessControlProvider createAccessControlProvider(UUID id,
+            Broker broker, Map<String, Object> attributes)
+    {
+        for (AccessControlFactory factory : _factories)
+        {
+            AccessControl accessControl = factory.createInstance(attributes);
+            if (accessControl != null)
+            {
+                return new AccessControlProviderAdapter(id, broker,accessControl, attributes, factory.getAttributeNames());
+            }
+        }
+
+        throw new IllegalArgumentException("No access control provider factory found for configuration attributes " + attributes);
+    }
+
+    public Collection<String> getSupportedAuthenticationProviders()
+    {
+        return _supportedAcessControlProviders;
+    }
+}