/*
   UnnecessaryNullCheckWithInstanceOf
   
   */
   
   package com.puppycrawl.tools.checkstyle.checks.coding.unnecessarynullcheckwithinstanceof;
   
   public class InputUnnecessaryNullCheckWithInstanceOfTernary {
       public String basicTernary(Object obj) {
          // violation below, 'Unnecessary nullity check'
          return obj != null && obj instanceof String ? ((String) obj) : "";
      }
      public String validTernary(Object obj) {
          return obj instanceof String ? ((String) obj) : "";
      }
      public String ternaryWithVariable(Object obj) {
          // violation below, 'Unnecessary nullity check'
          boolean check = obj != null && obj instanceof String;
          return check ? ((String) obj) : "";
      }
      public String simpleTernaryWithExtra(Object obj, boolean flag) {
          // violation below, 'Unnecessary nullity check'
          return flag && obj != null && obj instanceof String ? ((String) obj) : "";
      }
      public int evaluateObjects(Object a, Object b) {
          return a != null && a instanceof Integer // violation, 'Unnecessary nullity check'
                  ? (b != null && b instanceof Double ? 100 : -100) : 0;
                  // violation above, 'Unnecessary nullity check'
      }
  
      public Object chainedTernary(Object obj) {
          // violation below, 'Unnecessary nullity check'
          return obj != null && obj instanceof Integer ? (Integer) obj * 2
                  : obj != null && obj instanceof Double ? (Double) obj / 2
                  : "Unknown";
                  // violation 2 lines above 'Unnecessary nullity check'
      }
  
      public boolean complexLogical(Object a, Object b, boolean flag) {
          // 2 violations 3 lines below:
          //                        'Unnecessary nullity check'
          //                        'Unnecessary nullity check'
          return flag && a != null && a instanceof String && (b != null && b instanceof Number);
      }
  
      public int lambdaStyleCheck() {
          java.util.function.Function<Object, Integer> func = (obj) ->
                  // violation below, 'Unnecessary nullity check'
                  obj != null && obj instanceof String ? ((String) obj).length() : -1;
          return func.apply("Hello");
      }
  }