content: /*
   * Copyright 2020 Alibaba Group Holding Limited.
   *
   * 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 com.alibaba.graphscope.gremlin;
  
  import com.alibaba.graphscope.common.utils.ClassUtils;
  import com.google.common.base.Preconditions;
  
  import org.apache.commons.io.FileUtils;
  
  import java.io.File;
  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.nio.charset.StandardCharsets;
  
  public class Utils extends ClassUtils {
      /**
       * Set private field with given value
       *
       * @param obj       The given instance
       * @param fieldName The field name
       * @param value     The field value
       * @param <V>       The field value type
       */
      public static <V> void setFieldValue(Class<?> clazz, Object obj, String fieldName, V value) {
          Preconditions.checkNotNull(obj);
          Preconditions.checkNotNull(fieldName);
          Preconditions.checkNotNull(value);
  
          try {
              Field field = clazz.getDeclaredField(fieldName);
              field.setAccessible(true);
              field.set(obj, value);
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
      }
  
      public static <V> V getFieldValue(Class<?> clazz, Object obj, String fieldName) {
          Preconditions.checkNotNull(obj);
          Preconditions.checkNotNull(fieldName);
  
          try {
              Field field = clazz.getDeclaredField(fieldName);
              field.setAccessible(true);
              return (V) field.get(obj);
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
      }
  
      public static String[] removeStringEle(int i, String[] data) {
          if (data.length == 0 || i < 0 || i >= data.length) return data;
          String[] copy = new String[data.length - 1];
          for (int j = 0; j < data.length - 1; ++j) {
              if (j < i) {
                  copy[j] = data[j];
              } else {
                  copy[j] = data[j + 1];
              }
          }
          return copy;
      }
  
      public static String readStringFromFile(String filePath) throws IOException {
          return FileUtils.readFileToString(new File(filePath), StandardCharsets.UTF_8);
      }
  }
  