content: package com.alipay.api.internal.util;
  
  import com.alipay.api.AlipayApiException;
  import com.alipay.api.FileItem;
  
  import java.io.IOException;
  
  public class RequestCheckUtils {
      public static final String ERROR_CODE_ARGUMENTS_MISS    = "40001"; //Missing Required Arguments
      public static final String ERROR_CODE_ARGUMENTS_INVALID = "40002"; //Invalid Arguments
  
      public static void checkNotEmpty(Object value, String fieldName) throws AlipayApiException {
          if (value == null) {
              throw new AlipayApiException(ERROR_CODE_ARGUMENTS_MISS,
                      "client-error:Missing Required Arguments:" + fieldName + "");
          }
          if (value instanceof String) {
              if (((String) value).trim().length() == 0) {
                  throw new AlipayApiException(ERROR_CODE_ARGUMENTS_MISS,
                          "client-error:Missing Required Arguments:" + fieldName + "");
              }
          }
      }
  
      public static void checkMaxLength(String value, int maxLength, String fieldName)
              throws AlipayApiException {
          if (value != null) {
              if (value.length() > maxLength) {
                  throw new AlipayApiException(ERROR_CODE_ARGUMENTS_INVALID,
                          "client-error:Invalid Arguments:the length of " + fieldName
                                  + " can not be larger than " + maxLength + ".");
              }
          }
      }
  
      public static void checkMaxLength(FileItem fileItem, int maxLength, String fieldName)
              throws AlipayApiException {
          try {
              if (fileItem != null && fileItem.getContent() != null) {
  
                  if (fileItem.getContent().length > maxLength) {
                      throw new AlipayApiException(ERROR_CODE_ARGUMENTS_INVALID,
                              "client-error:Invalid Arguments:the length of " + fieldName
                                      + " can not be larger than " + maxLength + ".");
                  }
              }
          } catch (IOException e) {
              throw new RuntimeException(e);
          }
      }
  
      public static void checkMaxListSize(String value, int maxSize, String fieldName)
              throws AlipayApiException {
          if (value != null) {
              String[] list = value.split(",");
              if (list != null && list.length > maxSize) {
                  throw new AlipayApiException(ERROR_CODE_ARGUMENTS_INVALID,
                          "client-error:Invalid Arguments:the listsize(the string split by \",\") of "
                                  + fieldName + " must be less than " + maxSize + ".");
              }
          }
      }
  
      public static void checkMaxValue(Long value, long maxValue, String fieldName)
              throws AlipayApiException {
          if (value != null) {
              if (value > maxValue) {
                  throw new AlipayApiException(ERROR_CODE_ARGUMENTS_INVALID,
                          "client-error:Invalid Arguments:the value of " + fieldName
                                  + " can not be larger than " + maxValue + ".");
              }
          }
      }
  
      public static void checkMinValue(Long value, long minValue, String fieldName)
              throws AlipayApiException {
          if (value != null) {
              if (value < minValue) {
                  throw new AlipayApiException(ERROR_CODE_ARGUMENTS_INVALID,
                          "client-error:Invalid Arguments:the value of " + fieldName
                                  + " can not be less than " + minValue + ".");
              }
          }
      }
  }
  