afterNestedScope.java

// "Fix all 'Stream API call chain can be replaced with loop' problems in file" "true"

import java.util.*;
import java.util.function.Consumer;
import java.util.function.Predicate;
import java.util.stream.Stream;

import static java.util.Arrays.asList;

public class Main {
  public static long testNestedScope(List<String> list) {
      long count = 0L;
      for (String l : list) {
          if (l != null) {
              (new Consumer<String>() {
                  String lst = "hello";

                  public void accept(String lst) {
                      System.out.println(this.lst + lst);
                  }
              }).accept(l);
              count++;
          }
      }
      return count;
  }

  public static long testNestedScope2(List<String> list) {
      long count = 0L;
      for (String l : list) {
          if (l != null) {
              (new Consumer<String>() {
                  String list = "hello";

                  public void accept(String list) {
                      System.out.println(this.list + l);
                  }
              }).accept(l);
              count++;
          }
      }
      return count;
  }

  private static long testAnonymousConflictingVar(Map<String, List<String>> strings) {
      long sum = 0L;
      for (Map.Entry<String, List<String>> e : strings.entrySet()) {
          if (!e.getKey().isEmpty()) {
              long count = e.getValue().stream().filter(new Predicate<>() {
                  // we're inside anonymous class
                  @Override
                  public boolean test(String s) {
                      return e.getKey().equals(s);
                  }
              }).count();
              sum += count;
          }
      }
      return sum;
  }

  private static long testLambdaConflictingVar(Map<String, List<String>> strings) {
      long sum = 0L;
      for (Map.Entry<String, List<String>> e : strings.entrySet()) {
          if (!e.getKey().isEmpty()) {
              long count = count(e.getValue(), s -> e.getKey().equals(s));
              sum += count;
          }
      }
      return sum;
  }

  private static long testLambdaNotConflictingVar(Map<String, List<String>> strings) {
      long sum = 0L;
      for (Map.Entry<String, List<String>> s : strings.entrySet()) {
          if (!s.getKey().isEmpty()) {
              long count = count(s.getValue(), sx -> s.getKey().equals(sx));
              sum += count;
          }
      }
      return sum;
  }

  private static long count(List<String> list, Predicate<String> p) {
    long count = 0;
    for(String s : list) {
      if(p.test(s)) count++;
    }
    return count;
  }

  public static void main(String[] args) {
    System.out.println(testNestedScope(asList("a", "b", "c")));
    System.out.println(testNestedScope2(asList("a", "b", "c")));

    Map<String, List<String>> map = new HashMap<>();
    map.put("", Arrays.asList("", "a", "b"));
    map.put("a", Arrays.asList("", "a", "b", "a"));
    map.put("b", Arrays.asList("", "a", "b"));
    map.put("c", Arrays.asList("", "a", "b"));
    System.out.println(testAnonymousConflictingVar(map));
    System.out.println(testLambdaConflictingVar(map));
    System.out.println(testLambdaNotConflictingVar(map));

  }
}