SONARJAVA-4865 Fix issue when path is named regex (#4728)

its/autoscan/src/test/resources/autoscan/diffs/diff_S6856.json

@@ -1,6 +1,6 @@
 {
   "ruleKey": "S6856",
   "hasTruePositives": false,
-  "falseNegatives": 22,
+  "falseNegatives": 23,
   "falsePositives": 0
 }

java-checks-test-sources/default/src/main/java/checks/MissingPathVariableAnnotationCheckSample.java

@@ -10,6 +10,20 @@
 import org.springframework.web.bind.annotation.PutMapping;
 
 public class MissingPathVariableAnnotationCheckSample {
+
+  @GetMapping("/{name:[a-z-]+}-{version:\\d\\.\\d\\.\\d}{ext:\\.[a-z]+}") // Noncompliant
+  public void handleWithoutExt(@PathVariable String name, @PathVariable String version) {}
+
+  @GetMapping("/something/{id:[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}}") // Compliant
+  public String getObj(@PathVariable("id") String id){
+    return "";
+  }
+
+  @GetMapping("/{name:[a-z-]+}-{version:\\d\\.\\d\\.\\d}{ext:\\.[a-z]+}") // Compliant
+  public void handle(@PathVariable String name, @PathVariable String version, @PathVariable String ext) {}
+
+
+
   @GetMapping("/{id}") // Noncompliant [[sc=3;ec=23]] {{Bind path variable "id" to a method parameter.}}
   public String get(String id) {
     return "Hello World";

java-checks/src/main/java/org/sonar/java/checks/MissingPathVariableAnnotationCheck.java

@@ -25,6 +25,7 @@
 import java.util.Optional;
 import java.util.Set;
 import java.util.function.Predicate;
+import java.util.regex.MatchResult;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
@@ -45,6 +46,9 @@ public class MissingPathVariableAnnotationCheck extends IssuableSubscriptionVisi
   private static final String MODEL_ATTRIBUTE_ANNOTATION = "org.springframework.web.bind.annotation.ModelAttribute";
   private static final Pattern EXTRACT_PATH_VARIABLE = Pattern.compile("([^:}/]*)(:.*)?}.*");
   private static final Predicate<String> CONTAINS_PLACEHOLDER = Pattern.compile("\\$\\{.*}").asPredicate();
+  private static final Predicate<String> PATH_ARG_REGEX = Pattern.compile("\\{([^{}:]+:.*)}").asPredicate();
+  private static final Pattern PATH_REGEX = Pattern.compile("\\{([^{}]+)}");
+
   private static final List<String> MAPPING_ANNOTATIONS = List.of(
     "org.springframework.web.bind.annotation.GetMapping",
     "org.springframework.web.bind.annotation.PostMapping",
@@ -131,6 +135,15 @@ private static Set<String> extractPathVariables(String path) {
       return new HashSet<>();
     }
 
+    if (PATH_ARG_REGEX.test(path)) {
+      return PATH_REGEX.matcher(path).results()
+        .map(MatchResult::group)
+        .map(s -> s.substring(1))
+        .filter(s -> s.contains(":"))
+        .map(s -> s.split(":")[0])
+        .collect(Collectors.toSet());
+    }
+
     return Stream.of(path.split("\\{"))
       .map(EXTRACT_PATH_VARIABLE::matcher)
       .filter(Matcher::matches)