Files
561e2d81d0 [java-dfa] IDEA-300181 Report when the same stream is consumed more than once.
Co-authored-by: Tagir Valeev <tagir.valeev@jetbrains.com>

GitOrigin-RevId: 929f69d8e22285cae8906761df6b39ec46ce985c
2022-09-30 12:10:32 +00:00

210 lines
6.7 KiB
Java

import java.util.Iterator;
import java.util.List;
import java.util.Random;
import java.util.Spliterator;
import java.util.stream.Stream;
public class ConsumedStreamWithoutInline {
public static void test1() {
Stream<String> stream = Stream.of("x");
Iterator<String> iterator = stream.iterator();
Iterator<String> iterator2 = <warning descr="Stream has already been linked or consumed">stream</warning>.iterator();
}
public static void test2() {
Stream<String> stream = Stream.of("x");
Spliterator<String> spliterator = stream.spliterator();
Iterator<String> iterator = <warning descr="Stream has already been linked or consumed">stream</warning>.iterator();
}
public static void test3() {
Stream<String> stream = Stream.of("x");
for (int i = 0; i < 10; i++) {
Iterator<String> iterator = <warning descr="Stream might have already been linked or consumed">stream</warning>.iterator();
}
}
public static void test4() {
Stream<String> stream = Stream.of("x");
stream.forEach(System.out::println);
if (Math.random() > 0.5) {
Iterator<String> iterator = <warning descr="Stream has already been linked or consumed">stream</warning>.iterator();
}
}
public static void test5() {
Stream<String> stream = Stream.of("x");
switch (new Random().nextInt(10)) {
case 0:
Iterator<String> iterator = stream.iterator();
case 1:
Spliterator<String> spliterator = <warning descr="Stream might have already been linked or consumed">stream</warning>.spliterator();
}
}
public static void test6() {
Stream<String> stream = Stream.of("x");
try {
method1();
Iterator<String> iterator = stream.iterator();
} finally {
Spliterator<String> spliterator = <warning descr="Stream might have already been linked or consumed">stream</warning>.spliterator();
}
}
private static void method1() {}
public static void test7() {
Stream<String> stream = Stream.of("x");
try {
Iterator<String> iterator = stream.iterator();
} catch (Exception e) {
Spliterator<String> spliterator = <warning descr="Stream has already been linked or consumed">stream</warning>.spliterator();
}
}
public static void test1E() {
Stream<String> stream = Stream.of("x");
int x = new Random().nextInt(10);
if (x < 2) {
Iterator<String> iterator = stream.iterator();
}
if (x < 1) {
Spliterator<String> spliterator = <warning descr="Stream has already been linked or consumed">stream</warning>.spliterator();
}
}
public static void test2E() {
Stream<String> stream = Stream.of("x");
Iterator<String> iterator = stream.iterator();
double random = Math.random();
Iterator<String> iterator2 = <warning descr="Stream has already been linked or consumed">stream</warning>.iterator();
}
public static void test3E() {
Stream<String> stream = Stream.of("x");
double random = Math.random();
if (random > 0.5) {
Iterator<String> iterator = stream.iterator();
}
if (random > 0.9) {
Iterator<String> iterator2 = <warning descr="Stream has already been linked or consumed">stream</warning>.iterator();
}
}
public static void test6E() {
Stream<String> stream = Stream.of("x");
double random2 = Math.random();
Iterator<String> iterator = stream.iterator();
boolean parallel = stream.isParallel();
double random3 = Math.random();
method(stream);
Iterator<String> iterator2 = <warning descr="Stream has already been linked or consumed">stream</warning>.iterator();
}
private static void method(Stream<String> stream) {
Iterator<String> iterator = stream.iterator();
}
public static void test8E() {
Stream<String> stream = Stream.of("x");
Iterator<String> iterator = stream.iterator();
Stream<String> parallel = stream.parallel();
Iterator<String> iterator2 = <warning descr="Stream has already been linked or consumed">parallel</warning>.iterator();
}
public static Stream<String> test9E() {
Stream<String> stringStream = Stream.of("1");
Iterator<String> iterator1 = stringStream.iterator();
return <warning descr="Stream has already been linked or consumed">stringStream</warning>;
}
private static void test10E(Stream<Object> stream) {
Iterator<Object> iterator = stream.iterator();
String text = "noError";
try {
Iterator<Object> iterator2 = <warning descr="Stream has already been linked or consumed">stream</warning>.iterator();
} catch (IllegalStateException e) {
text = "IllegalStateException";
} catch (RuntimeException e) {
text = "RuntimeException";
}
if (<warning descr="Condition 'text.equals(\"IllegalStateException\")' is always 'true'">text.equals("IllegalStateException")</warning>) {
System.out.println("error");
}
}
private static void test11E(int x) {
Stream<String> stream = Stream.of("x");
if (x == 0) {
Iterator<String> iterator = stream.iterator();
}
Iterator<String> iterator2 = <warning descr="Stream might have already been linked or consumed">stream</warning>.iterator();
}
public static void test1N() {
Stream<String> stream = Stream.of("x");
if (Math.random() > 0.5) {
Iterator<String> iterator = stream.iterator();
} else {
Spliterator<String> spliterator = stream.spliterator();
}
}
public static void test3N() {
Stream<String> stream = Stream.of("x");
System.out.println(stream.isParallel());
Spliterator<String> spliterator = stream.spliterator();
}
public static void test4N() {
Stream<String> stream = Stream.of("x");
switch (new Random().nextInt(10)) {
case 0:
Iterator<String> iterator = stream.iterator();
break;
case 1:
Spliterator<String> spliterator = stream.spliterator();
}
}
public static void test5N() {
Stream<String> stream = Stream.of("x");
for (int i = 0; i < 10; i++) {
if (Math.random() > 0.5) {
Iterator<String> iterator = stream.iterator();
break;
}
}
}
public static void test1NE() {
Stream<String> stream = Stream.of("x");
boolean b = Math.random() > 0.5;
if (b) {
Spliterator<String> spliterator = stream.spliterator();
}
if (!b) {
Iterator<String> iterator = stream.iterator();
}
}
public static void test2NE() {
Stream<String> stream = Stream.of("x");
int x = new Random().nextInt(10);
if (x < 2) {
Spliterator<String> spliterator = stream.spliterator();
}
if (x > 5) {
Iterator<String> iterator = stream.iterator();
}
}
public void test3NE(List<String> list) {
Iterator<String> iterator1 = list.stream().iterator();
Iterator<String> iterator2 = list.stream().iterator();
}
}