content: // 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 com.cloud.api;
  
  import java.lang.reflect.Method;
  import java.lang.reflect.Type;
  
  import org.apache.cloudstack.api.ResponseObject;
  import org.apache.cloudstack.api.response.ExceptionResponse;
  import org.apache.cloudstack.api.response.SuccessResponse;
  import org.apache.commons.lang3.StringUtils;
  import org.apache.logging.log4j.Logger;
  import org.apache.logging.log4j.LogManager;
  
  import com.google.gson.JsonElement;
  import com.google.gson.JsonObject;
  import com.google.gson.JsonSerializationContext;
  import com.google.gson.JsonSerializer;
  
  public class ResponseObjectTypeAdapter implements JsonSerializer<ResponseObject> {
      protected Logger logger = LogManager.getLogger(getClass());
  
      @Override
      public JsonElement serialize(ResponseObject responseObj, Type typeOfResponseObj, JsonSerializationContext ctx) {
          JsonObject obj = new JsonObject();
  
          if (responseObj instanceof SuccessResponse) {
              obj.addProperty("success", ((SuccessResponse)responseObj).getSuccess());
              if (!StringUtils.isEmpty(((SuccessResponse) responseObj).getDisplayText())) {
                  obj.addProperty("details", ((SuccessResponse)responseObj).getDisplayText());
              }
              return obj;
          } else if (responseObj instanceof ExceptionResponse) {
              obj.addProperty("errorcode", ((ExceptionResponse)responseObj).getErrorCode());
              obj.addProperty("errortext", ((ExceptionResponse)responseObj).getErrorText());
              return obj;
          } else {
              obj.add(responseObj.getObjectName(), ApiResponseGsonHelper.getBuilder().create().toJsonTree(responseObj));
              return obj;
          }
      }
  
      private Method getGetMethod(Object o, String propName) {
          Method method = null;
          String methodName = getGetMethodName("get", propName);
          try {
              method = o.getClass().getMethod(methodName);
          } catch (SecurityException e1) {
              logger.error("Security exception in getting ResponseObject " + o.getClass().getName() + " get method for property: " + propName);
          } catch (NoSuchMethodException e1) {
              if (logger.isTraceEnabled()) {
                  logger.trace("ResponseObject " + o.getClass().getName() + " does not have " + methodName + "() method for property: " + propName +
                      ", will check is-prefixed method to see if it is boolean property");
              }
          }
  
          if (method != null)
              return method;
  
          methodName = getGetMethodName("is", propName);
          try {
              method = o.getClass().getMethod(methodName);
          } catch (SecurityException e1) {
              logger.error("Security exception in getting ResponseObject " + o.getClass().getName() + " get method for property: " + propName);
          } catch (NoSuchMethodException e1) {
              logger.warn("ResponseObject " + o.getClass().getName() + " does not have " + methodName + "() method for property: " + propName);
          }
          return method;
      }
  
      private static String getGetMethodName(String prefix, String fieldName) {
          StringBuffer sb = new StringBuffer(prefix);
  
          if (fieldName.length() >= prefix.length() && fieldName.substring(0, prefix.length()).equals(prefix)) {
              return fieldName;
          } else {
              sb.append(fieldName.substring(0, 1).toUpperCase());
              sb.append(fieldName.substring(1));
          }
  
          return sb.toString();
      }
  }
  