/*
   UnnecessaryNullCheckWithInstanceOf
   
   */
   
   package com.puppycrawl.tools.checkstyle.checks.coding.unnecessarynullcheckwithinstanceof;
   
   public class InputUnnecessaryNullCheckWithInstanceOfMultipleConditions {
   
      public void multipleConditions(Object obj, String str) {
          // violation below, 'Unnecessary nullity check'
          if (obj != null && obj instanceof String && !str.isEmpty()) {
              String s = (String) obj;
          }
  
          // violation below, 'Unnecessary nullity check'
          if (!str.isEmpty() && obj != null && obj instanceof String) {
              String s = (String) obj;
          }
  
          // violation below, 'Unnecessary nullity check'
          if (obj != null && obj instanceof String && str != null && !str.isEmpty()) {
              String s = (String) obj;
          }
  
          // violation below, 'Unnecessary nullity check'
          if ( obj instanceof String && str != null && obj != null ) {
              String s = (String) obj;
          }
      }
  
      public void multipleInstanceOfChecks(Object obj1, Object obj2) {
          // 2 violations 3 lines below:
          //                            'Unnecessary nullity check'
          //                            'Unnecessary nullity check'
          if (obj1 != null && obj1 instanceof String && obj2 != null && obj2 instanceof Integer) {
              String s = (String) obj1;
              Integer i = (Integer) obj2;
          }
          if (obj1 != null && obj2 instanceof String) {
              String s = (String) obj1;
          }
          if (null != obj2 && obj1 instanceof String) {
              String s = (String) obj1;
          }
          if (obj1 != obj2 && obj1 instanceof String) {
              String s = (String) obj1;
          }
          // violation below, 'Unnecessary nullity check'
          if (obj1 != null && (obj2 != null && obj1 instanceof String)) {
             System.out.println("obj is a String and obj2 is not null");
          }
          if ((obj1 != null || obj2 instanceof String) && obj2 != null) {
             String s = (String) obj1;
          }
  
      }
  }