Initial OpenECOMP Portal commit

[portal.git] / ecomp-portal-BE / src / main / java / org / openecomp / portalapp / portal / utils / HashMapFromList.java

diff --git a/ecomp-portal-BE/src/main/java/org/openecomp/portalapp/portal/utils/HashMapFromList.java b/ecomp-portal-BE/src/main/java/org/openecomp/portalapp/portal/utils/HashMapFromList.java
new file mode 100644 (file)
index 0000000..c9a5532
--- /dev/null
+++ b/ecomp-portal-BE/src/main/java/org/openecomp/portalapp/portal/utils/HashMapFromList.java
@@ -0,0 +1,100 @@
+/*-
+ * ================================================================================
+ * eCOMP Portal
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property
+ * ================================================================================
+ * 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.
+ * ================================================================================
+ */
+package org.openecomp.portalapp.portal.utils;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.List;
+
+import org.openecomp.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>
+ */
+public class HashMapFromList<T> {
+       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) {
+                                               String stackTrace = EcompPortalUtils.getStackTrace(e1);
+                                               logger.error(EELFLoggerDelegate.errorLogger, "Object of class " + object.getClass().getName() + ", field " + parmName + ". Details: ", stackTrace);
+                                               return new HashMap<String, T>();
+                                       }
+                               }
+                       } catch (Exception e) {
+                               logger.error(EELFLoggerDelegate.errorLogger, EcompPortalUtils.getStackTrace(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) {
+                                                       String stackTrace = EcompPortalUtils.getStackTrace(e2);
+                                                       logger.error(EELFLoggerDelegate.errorLogger, "Object of class " + object.getClass().getName() + ", method " + getterName + ". Details: ", stackTrace);
+                                                       return new HashMap<String, T>();
+                                               }
+                                       }
+                               } catch (Exception e3) {
+                                       String stackTrace = EcompPortalUtils.getStackTrace(e3);
+                                       logger.error(EELFLoggerDelegate.errorLogger, "Object of class " + object.getClass().getName() + ", bad field '" + name + "' or method '" + getterName + "()'. Details: " + stackTrace);
+                                       return new HashMap<String, T>();
+                               }
+                       }
+               }
+               if (list.size() != result.size()) {
+                       logger.warn(EELFLoggerDelegate.errorLogger, "Duplicated or empty keys were found!!!");
+               }
+               return result;
+       }
+
+}