1 files changed, 54 insertions, 0 deletions
diff --git a/qpid/java/broker-core/src/main/java/org/apache/qpid/server/configuration/startup/RecovererHelper.java b/qpid/java/broker-core/src/main/java/org/apache/qpid/server/configuration/startup/RecovererHelper.java
new file mode 100644
index 0000000000..cc0426131f
--- /dev/null
+++ b/qpid/java/broker-core/src/main/java/org/apache/qpid/server/configuration/startup/RecovererHelper.java
@@ -0,0 +1,54 @@
+/*
+ *
+ * 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.configuration.startup;
+
+import org.apache.qpid.server.model.Broker;
+import org.apache.qpid.server.model.ConfiguredObject;
+
+public class RecovererHelper
+{
+    public static Broker verifyOnlyBrokerIsParent(ConfiguredObject... parents)
+    {
+        return verifyOnlyParentIsOfType(Broker.class, parents);
+    }
+
+    @SuppressWarnings("unchecked")
+    public static <T extends ConfiguredObject> T verifyOnlyParentIsOfType(Class<T> parentClass, ConfiguredObject... parents)
+    {
+        if (parentClass == null)
+        {
+            throw new IllegalArgumentException("Parent class is not specified!");
+        }
+        if (parents == null || parents.length == 0)
+        {
+            throw new IllegalArgumentException("Parent of type " + parentClass.getSimpleName() +" is not passed!");
+        }
+        if (parents.length != 1)
+        {
+            throw new IllegalArgumentException("Only one parent is expected!");
+        }
+        if (!parentClass.isAssignableFrom(parents[0].getClass()))
+        {
+            throw new IllegalArgumentException("Parent is not instance of " + parentClass.getSimpleName());
+        }
+        return (T)parents[0];
+    }
+}