refactored test data generation. Refactored entity factor methods.

Signed-off-by: Kai Zimmermann <kai.zimmermann@bosch-si.com>

hawkbit-repository/hawkbit-repository-core/src/main/java/org/eclipse/hawkbit/repository/jpa/model/helper/SystemManagementHolder.java

@@ -0,0 +1,60 @@
+/**
+ * Copyright (c) 2015 Bosch Software Innovations GmbH and others.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.eclipse.hawkbit.repository.jpa.model.helper;
+
+import org.eclipse.hawkbit.repository.SystemManagement;
+import org.springframework.beans.factory.annotation.Autowired;
+
+/**
+ * A singleton bean which holds {@link SystemManagement} service and makes it
+ * accessible to beans which are not managed by spring, e.g. JPA entities.
+ *
+ *
+ *
+ **/
+public final class SystemManagementHolder {
+
+    private static final SystemManagementHolder INSTANCE = new SystemManagementHolder();
+
+    @Autowired
+    private SystemManagement systemManagement;
+
+    private SystemManagementHolder() {
+    }
+
+    /**
+     * @return the singleton {@link SystemManagementHolder} instance
+     */
+    public static SystemManagementHolder getInstance() {
+        return INSTANCE;
+    }
+
+    /**
+     * @return the systemManagement
+     */
+    public SystemManagement getSystemManagement() {
+        return systemManagement;
+    }
+
+    /**
+     * @param systemManagement
+     *            the systemManagement to set
+     */
+    public void setSystemManagement(final SystemManagement systemManagement) {
+        this.systemManagement = systemManagement;
+    }
+
+    /**
+     * @return the {@link SystemManagement#currentTenant()}.
+     */
+    public String currentTenant() {
+        return systemManagement.currentTenant();
+    }
+
+}