1 files changed, 73 insertions, 0 deletions
diff --git a/common/src/main/java/org/openecomp/mso/client/RestPropertiesLoader.java b/common/src/main/java/org/openecomp/mso/client/RestPropertiesLoader.java
new file mode 100644
index 0000000000..647acdfcf4
--- /dev/null
+++ b/common/src/main/java/org/openecomp/mso/client/RestPropertiesLoader.java
@@ -0,0 +1,73 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.mso.client;
+
+import java.util.Iterator;
+import java.util.ServiceLoader;
+
+public class RestPropertiesLoader {
+
+	private final ServiceLoader<RestProperties> services;
+	private RestPropertiesLoader() {
+		services = ServiceLoader.load(RestProperties.class);
+	}
+	
+	private static class Helper {
+		private static final RestPropertiesLoader INSTANCE = new RestPropertiesLoader();
+	}
+	
+	public static RestPropertiesLoader getInstance() {
+		return Helper.INSTANCE;
+	}
+	
+	public <T> T getNewImpl(Class<? extends RestProperties> clazz) {
+		return this.getImpl(clazz, true);
+	}
+	public <T> T getImpl(Class<? extends RestProperties> clazz) {
+		return this.getImpl(clazz, false);
+	}
+	
+	private <T> T getImpl(Class<? extends RestProperties> clazz, boolean forceNewInstance) {
+		T result = null;
+		Iterator<RestProperties> propertyImpls = services.iterator();
+		RestProperties item;
+		while (propertyImpls.hasNext()) {
+			item = propertyImpls.next();
+			if (clazz.isAssignableFrom(item.getClass())) {
+				try {
+					if (forceNewInstance) {	
+						result = (T)item.getClass().newInstance();
+					} else {
+						result = (T)item;
+					}
+				} catch (InstantiationException | IllegalAccessException e) {
+					/* all spi implementations must provide a public
+					 * no argument constructor
+					 */
+					
+				}
+				//break;
+			}
+		}
+		
+		return result;
+	}
+}