fix: correct package assumption when there is a star import

src/main/java/spoon/support/compiler/jdt/ReferenceBuilder.java

@@ -82,6 +82,7 @@
 import spoon.reflect.reference.CtWildcardReference;
 import spoon.support.reflect.CtExtendedModifier;
 
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -1059,14 +1060,28 @@ void setPackageOrDeclaringType(CtTypeReference<?> ref, CtReference declaring) {
 				javaLangPackageReference.setSimpleName("java.lang");
 				ref.setPackage(javaLangPackageReference);
 			} catch (NoClassDefFoundError | ClassNotFoundException e) {
-				// in that case we consider the package should be the same as the current one. Fix #1293
-				ref.setPackage(jdtTreeBuilder.getContextBuilder().compilationUnitSpoon.getDeclaredPackage().getReference());
+				assert jdtTreeBuilder.getFactory().getEnvironment().getNoClasspath();
+				ContextBuilder ctx = jdtTreeBuilder.getContextBuilder();
+				if (containsStarImport(ctx.compilationunitdeclaration.imports)) {
+					// If there is an unresolved star import in noclasspath,
+					// we can't tell which package the type belongs to (#3337)
+					CtPackageReference pkgRef = jdtTreeBuilder.getFactory().Core().createPackageReference();
+					pkgRef.setImplicit(true);
+					ref.setPackage(pkgRef);
+				} else {
+					// otherwise the type must belong to the CU's package (#1293)
+					ref.setPackage(ctx.compilationUnitSpoon.getDeclaredPackage().getReference());
+				}
 			}
 		} else {
 			throw new AssertionError("unexpected declaring type: " + declaring.getClass() + " of " + declaring);
 		}
 	}
 
+	private static boolean containsStarImport(ImportReference[] imports) {
+		return imports != null && Arrays.stream(imports).anyMatch(imp -> imp.toString().endsWith("*"));
+	}
+
 	/**
 	 * In noclasspath, lambda doesn't have always a binding for their variables accesses in their block/expression.
 	 * Here, we make the job of JDT and bind their variables accesses to their parameters.

src/test/java/spoon/test/pkg/PackageTest.java

@@ -22,7 +22,9 @@
 import spoon.SpoonModelBuilder;
 import spoon.compiler.Environment;
 import spoon.compiler.SpoonResourceHelper;
+import spoon.reflect.CtModel;
 import spoon.reflect.code.CtComment;
+import spoon.reflect.code.CtTypeAccess;
 import spoon.reflect.declaration.CtAnnotation;
 import spoon.reflect.declaration.CtAnnotationType;
 import spoon.reflect.declaration.CtClass;
@@ -291,6 +293,22 @@ public void testAddAnnotationToPackage() throws Exception {
 		}
 	}
 
+	@Test
+	public void testNoPackageAssumptionWithStarImportNoClasspath() {
+		// contract: The package of a type not on the classpath should not guessed if there is an unresolved star import
+		final Launcher launcher = new Launcher();
+		launcher.getEnvironment().setNoClasspath(true);
+		launcher.addInputResource("./src/test/resources/noclasspath/TypeAccessStarImport.java");
+		CtModel model = launcher.buildModel();
+
+		List<CtTypeAccess<?>> typeAccesses = model.getElements(e -> e.getAccessedType().getSimpleName().equals("SomeClass"));
+		assertEquals("There should only be a single type access in the test source code", 1, typeAccesses.size());
+		CtPackageReference pkgRef = typeAccesses.get(0).getAccessedType().getPackage();
+
+		assertTrue(pkgRef.getSimpleName().isEmpty());
+		assertTrue(pkgRef.isImplicit());
+	}
+
 	@Test
 	public void testGetFQNSimple() {
 		// contract: CtPackageReference simple name is also the fully qualified name of its referenced package

src/test/resources/noclasspath/TypeAccessStarImport.java

@@ -0,0 +1,10 @@
+// see https://github.com/inria/spoon/issues/3337
+
+package bug;
+
+import some.pkg.*;
+
+public class TypeAccessStarImport {
+    // SomeClass could belong to either the bug package or some.pkg, should not guess which one!
+    int value = SomeClass.generateValue();
+}