#12 -- Fix code

src/main/java/ru/ulstu/extractor/heuristic/service/StructuralUnitService.java

@@ -13,6 +13,7 @@ import ru.ulstu.extractor.service.GitRepositoryService;
 import java.io.File;
 import java.io.IOException;
 import java.util.List;
+import java.util.function.Predicate;
 
 @Service
 public class StructuralUnitService {
@@ -32,18 +33,24 @@ public class StructuralUnitService {
         File rootPath = gitRepositoryService.getProjectDirectoryFile(repositoryUrl);
         List<File> projectFiles = directoryService.getFilesRecursively(rootPath);
         List<File> rootProjectFiles = directoryService.getDirectoryFiles(rootPath.toPath());
-        StructuralUnitIdentifier selectedIdentifier = structuralUnitIdentifiers.stream()
-                .filter(structuralUnitIdentifier -> structuralUnitIdentifier.canAppliedToProject(rootPath.getPath(), projectFiles, rootProjectFiles))
-                .findAny()
-                .orElseThrow(() -> new RuntimeException("Identifier not found"));
-        return selectedIdentifier.getEntityClasses(rootPath.getPath(), projectFiles, rootProjectFiles);
+        return getStructuralUnitIdentifier(
+                structuralUnitIdentifier -> structuralUnitIdentifier.canAppliedToProject(
+                        rootPath.getPath(),
+                        projectFiles,
+                        rootProjectFiles)
+        ).getEntityClasses(rootPath.getPath(), projectFiles, rootProjectFiles);
     }
 
     public boolean containsEntity(File projectFile) {
-        StructuralUnitIdentifier selectedIdentifier = structuralUnitIdentifiers.stream()
-                .filter(structuralUnitIdentifier -> structuralUnitIdentifier.canAppliedToFile(projectFile))
+        return getStructuralUnitIdentifier(
+                structuralUnitIdentifier -> structuralUnitIdentifier.canAppliedToFile(projectFile)
+        ).isEntityClass(projectFile);
+    }
+
+    private StructuralUnitIdentifier getStructuralUnitIdentifier(Predicate<StructuralUnitIdentifier> predicate) {
+        return structuralUnitIdentifiers.stream()
+                .filter(predicate)
                 .findAny()
                 .orElseThrow(() -> new RuntimeException("Identifier not found"));
-        return selectedIdentifier.isEntityClass(projectFile);
     }
 }