content: package com.jerry.poetry.util;
  
  import java.util.Collection;
  import java.util.Date;
  import java.util.Map;
  
  public class ComUtil {
  
      public static boolean isEmpty(Object aObj) {
          if (aObj instanceof String) {
              return isEmpty((String) aObj);
          } else if (aObj instanceof Long) {
              return isEmpty((Long) aObj);
          } else if (aObj instanceof Date) {
              return isEmpty((Date) aObj);
          } else if (aObj instanceof Collection) {
              return isEmpty((Collection) aObj);
          } else if (aObj instanceof Map) {
              return isEmpty((Map) aObj);
          } else if (aObj != null && aObj.getClass().isArray()) {
              return isEmptyArray(aObj);
          } else {
              return isNull(aObj);
          }
      }
  
      private static boolean isEmptyArray(Object array) {
          int length = 0;
          if (array instanceof int[]) {
              length = ((int[]) array).length;
          } else if (array instanceof byte[]) {
              length = ((byte[]) array).length;
          } else if (array instanceof short[]) {
              length = ((short[]) array).length;
          } else if (array instanceof char[]) {
              length = ((char[]) array).length;
          } else if (array instanceof float[]) {
              length = ((float[]) array).length;
          } else if (array instanceof double[]) {
              length = ((double[]) array).length;
          } else if (array instanceof long[]) {
              length = ((long[]) array).length;
          } else if (array instanceof boolean[]) {
              length = ((boolean[]) array).length;
          } else {
              length = ((Object[]) array).length;
          }
          if (length == 0) {
              return true;
          }
          return false;
      }
  
  
      public static boolean isEmpty(Date aDate) {
          if (aDate == null) {
              return true;
          } else {
              return false;
          }
      }
  
      public static boolean isEmpty(Long aLong) {
          if (aLong == null) {
              return true;
          } else {
              return false;
          }
      }
  
  
      public static boolean isEmpty(Map m) {
          if (m == null || m.size() == 0) {
              return true;
          }
          return false;
      }
  
      public static boolean isEmpty(Collection c) {
          if (c == null || c.size() == 0) {
              return true;
          }
          return false;
      }
  
      public static boolean isEmpty(String aStr) {
          if (aStr == null || aStr.trim().isEmpty()) {
              return true;
          } else {
              return false;
          }
      }
  
  
  
      public static String trim(String aStr) {
          if (aStr == null) {
              return "";
          } else {
              return aStr.trim();
          }
      }
  
      public static boolean isNull(Object oStr) {
          if (oStr == null) {
              return true;
          } else {
              return false;
          }
      }
  
  
      public static boolean equals(String str1, String str2) {
          return str1 != null ? str1.equals(str2) : str2 == null;
      }
  
      public static boolean equals(Long L1, Long L2) {
          return L1 != null ? L1.equals(L2) : L2 == null;
      }
  
      public static boolean equals(Object obj1, Object obj2) {
          boolean result;
          if (obj1 != null) {
              result = obj1.equals(obj2);
          } else {
              result = (obj2 == null);
          }
          return result;
      }
  
      public static boolean equalsIgnoreCase(String str1, String str2) {
          return str1 != null ? str1.equalsIgnoreCase(str2) : str2 == null;
      }
  
  }
  