--- /dev/null
+/*-
+ * ============LICENSE_START==========================================
+ * ONAP Portal
+ * ===================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ===================================================================
+ *
+ * Unless otherwise specified, all software contained herein is licensed
+ * under the Apache License, Version 2.0 (the "License");
+ * you may not use this software 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.
+ *
+ * Unless otherwise specified, all documentation contained herein is licensed
+ * under the Creative Commons License, Attribution 4.0 Intl. (the "License");
+ * you may not use this documentation except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://creativecommons.org/licenses/by/4.0/
+ *
+ * Unless required by applicable law or agreed to in writing, documentation
+ * 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============================================
+ *
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ */
+package org.onap.portalapp.portal.utils;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.List;
+
+import org.onap.portalsdk.core.logging.logic.EELFLoggerDelegate;
+
+/**
+ *
+ * @author Vladimir Turovets This class is used to create HashMap<String, T>
+ * from the list of T objects. We suppose that
+ * 1) T object contains field 'parmName' or getter 'getParmName()'.
+ * The value of object.parmName or object.getParmName() is used as
+ * a key in created hashMap.
+ * 2) for all objects in the list 'parmName' or getter
+ * 'getParmName().toString' has to be unique and not null.
+ * This class has one function only:
+ * HashMap<String, T> hashMap(List<T> list, String name) and returns
+ * hash map created from list.
+ *
+ * @param <T>
+ * Type
+ */
+public class HashMapFromList<T> {
+ private EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(HashMapFromList.class);
+
+ public HashMap<String, T> hashMap(List<T> list, String name) {
+ HashMap<String, T> result = new HashMap<String, T>();
+ if (list == null || list.size() == 0 || name == null) {
+ return result;
+ }
+ name = name.trim();
+ if (name.length() > 0) {
+ T object = list.get(0);
+ try {
+ String parmName = name;
+ Field field = object.getClass().getField(parmName);
+ for (T obj : list) {
+ try {
+ Object o = field.get(obj);
+ if (o != null)
+ result.put(o.toString(), obj);
+ } catch (Exception e1) {
+ logger.error(EELFLoggerDelegate.errorLogger, "hashMap failed 1: object of class " + object.getClass().getName() + ", field " + parmName, e1);
+ return new HashMap<String, T>();
+ }
+ }
+ } catch (Exception e) {
+ String getterName = "get" + (name.length() == 1 ? name.toUpperCase() : (name.substring(0, 1).toUpperCase() + name.substring(1)));
+ try {
+ Class<?>[] parmClasses = null;
+ Method method = object.getClass().getMethod(getterName, parmClasses);
+ Object[] parmValues = new Object[0];
+ for (T obj : list) {
+ try {
+ Object o = method.invoke(obj, parmValues);
+ if (o != null)
+ result.put(o.toString(), obj);
+ } catch (Exception e2) {
+ logger.error(EELFLoggerDelegate.errorLogger, "hashMap failed 2: object of class " + object.getClass().getName() + ", method " + getterName, e2);
+ return new HashMap<String, T>();
+ }
+ }
+ } catch (Exception e3) {
+ logger.error(EELFLoggerDelegate.errorLogger, "hashMap failed 3: object of class " + object.getClass().getName() + ", bad field '" + name + "' or method '" + getterName + "()", e3);
+ return new HashMap<String, T>();
+ }
+ }
+ }
+ if (list.size() != result.size()) {
+ logger.warn(EELFLoggerDelegate.errorLogger, "Duplicated or empty keys were found!!!");
+ }
+ return result;
+ }
+
+}