StreamToLoop: unwrap negation and ternary; minor refactoring

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/afterAllMatchNot.java

@@ -0,0 +1,17 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.Arrays;
+import java.util.Objects;
+
+public class Main {
+  boolean test(String[] strings) {
+      for (String s : strings) {
+          if (Objects.nonNull(s)) {
+              if (!s.startsWith("xyz")) {
+                  return true;
+              }
+          }
+      }
+      return false;
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/afterAnyMatchTernary.java

@@ -0,0 +1,17 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.Arrays;
+import java.util.Objects;
+
+public class Main {
+  String test(String[] strings) {
+      for (String s : strings) {
+          if (Objects.nonNull(s)) {
+              if (!s.startsWith("xyz")) {
+                  return "s";
+              }
+          }
+      }
+      return null;
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/afterFindFirstIsPresentNotTernary.java

@@ -0,0 +1,17 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.List;
+import java.util.Objects;
+
+public class Main {
+  String test(List<List<String>> strings) {
+      for (List<String> string : strings) {
+          if (Objects.nonNull(string)) {
+              for (String s : string) {
+                  return "abc";
+              }
+          }
+      }
+      return "xyz";
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/beforeAllMatchNot.java

@@ -0,0 +1,10 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.Arrays;
+import java.util.Objects;
+
+public class Main {
+  boolean test(String[] strings) {
+    return !Arrays.stream(strings).filter(Objects::nonNull).allM<caret>atch(s -> s.startsWith("xyz"));
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/beforeAnyMatchTernary.java

@@ -0,0 +1,10 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.Arrays;
+import java.util.Objects;
+
+public class Main {
+  String test(String[] strings) {
+    return Arrays.stream(strings).filter(Objects::nonNull).an<caret>yMatch(s -> !s.startsWith("xyz")) ? "s" : null;
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/beforeFindFirstIsPresentNotTernary.java

@@ -0,0 +1,10 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.List;
+import java.util.Objects;
+
+public class Main {
+  String test(List<List<String>> strings) {
+    return !strings.stream().filter(Objects::nonNull).flatMap(List::stream).fin<caret>dFirst().isPresent() ? "xyz" : "abc";
+  }
+}