StreamApiMigrationInspection: refactoring of collect scenarios: CollectTerminal interface extracted and used; all forEach scenarios moved to ForEachMigration; cosmetics

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/afterCollectHashSetFieldInitializer.java

@@ -8,8 +8,8 @@ public class Collect {
     }
   }
 
-  Set<String> names = new HashSet<>();
+  final Set<String> names = new HashSet<>();
   void collectNames(List<Person> persons){
-      persons.stream().map(Person::getName).forEach(s -> names.add(s));
+      persons.stream().map(Person::getName).forEach(names::add);
   }
 }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/afterSortedToArray.java

@@ -0,0 +1,8 @@
+// "Replace with toArray" "true"
+import java.util.*;
+
+public class Test {
+  String[] test(List<String> list) {
+      return list.stream().filter(Objects::nonNull).sorted(String.CASE_INSENSITIVE_ORDER).toArray(String[]::new);
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/beforeCollectHashSetFieldInitializer.java

@@ -8,7 +8,7 @@ public class Collect {
     }
   }
 
-  Set<String> names = new HashSet<>();
+  final Set<String> names = new HashSet<>();
   void collectNames(List<Person> persons){
     for (Person person : pers<caret>ons) {
       names.add(person.getName());

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/beforeDisableForArrays.java

@@ -4,7 +4,7 @@ import java.util.*;
 class A {
   void fun(List<String>... lists) {
     for (List<String> list : li<caret>sts) {
-      System.out.println(list);
+      list.add("");
     }
   }
 

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/beforeSortedToArray.java

@@ -0,0 +1,15 @@
+// "Replace with toArray" "true"
+import java.util.*;
+
+public class Test {
+  String[] test(List<String> list) {
+    List<String> result = new LinkedList<>();
+    for(String str : li<caret>st) {
+      if(str != null) {
+        result.add(str);
+      }
+    }
+    result.sort(String.CASE_INSENSITIVE_ORDER);
+    return result.toArray(new String[0]);
+  }
+}