code: /*
   * 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 org.apache.skywalking.oal.rt.util;
  
  import java.util.List;
  
  public class ClassMethodUtil {
      public static String toGetMethod(String attribute) {
          return "get" + attribute.substring(0, 1).toUpperCase() + attribute.substring(1);
      }
  
      public static String toSetMethod(String attribute) {
          return "set" + attribute.substring(0, 1).toUpperCase() + attribute.substring(1);
      }
  
      public static String toIsMethod(String attribute) {
          return "is" + attribute.substring(0, 1).toUpperCase() + attribute.substring(1);
      }
  
      /**
       * @return nested get methods.
       */
      public static String toGetMethod(List<String> attributes) {
          StringBuilder method = new StringBuilder();
          for (int i = 0; i < attributes.size(); i++) {
              if (i != 0) {
                  method.append(".");
              }
              if (isMapExpression(attributes.get(i))) {
                  method.append(mapExpression(attributes.get(i)));
              } else {
                  method.append(toGetMethod(attributes.get(i))).append("()");
              }
          }
          return method.toString();
      }
  
      /**
       * @return nested get/is methods.
       */
      public static String toIsMethod(List<String> attributes) {
          StringBuilder method = new StringBuilder();
          for (int i = 0; i < attributes.size(); i++) {
              if (i != 0) {
                  method.append(".");
              }
              if (i != attributes.size() - 1) {
                  method.append(toGetMethod(attributes.get(i))).append("()");
              } else {
                  method.append(toIsMethod(attributes.get(i))).append("()");
              }
          }
          return method.toString();
      }
  
      /**
       * @return empty if this attribute is not type of map.
       */
      private static String mapExpression(String attribute) {
          final int indexOf = attribute.indexOf("[");
          return toGetMethod(attribute.substring(0, indexOf))
              + "(" + attribute.substring(indexOf + 1, attribute.length() - 1) + ")";
      }
  
      private static boolean isMapExpression(String attribute) {
          return attribute.indexOf("[") > 0 && attribute.endsWith("]");
      }
  }
  