fix: Search for packages in all available Java modules

src/main/java/spoon/reflect/factory/PackageFactory.java

@@ -11,6 +11,7 @@
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
+import java.util.Objects;
 import java.util.StringTokenizer;
 import spoon.reflect.declaration.CtModule;
 import spoon.reflect.declaration.CtPackage;
@@ -157,13 +158,24 @@ public CtPackage get(String qualifiedName) {
 		if (qualifiedName.contains(CtType.INNERTTYPE_SEPARATOR)) {
 			throw new RuntimeException("Invalid package name " + qualifiedName);
 		}
+
+		return factory.getModel().getAllModules().stream()
+				.map(module -> getPackageFromModule(qualifiedName, module))
+				.filter(Objects::nonNull)
+				.findFirst()
+				.orElse(null);
+	}
+
+	/**
+	 * @param qualifiedName Qualified name of a package.
+	 * @param module A module in which to search for the package.
+	 * @return The package if found in this module, otherwise null.
+	 */
+	private static CtPackage getPackageFromModule(String qualifiedName, CtModule module) {
 		StringTokenizer token = new StringTokenizer(qualifiedName, CtPackage.PACKAGE_SEPARATOR);
-		CtPackage current = factory.getModel().getRootPackage();
-		if (token.hasMoreElements()) {
+		CtPackage current = module.getRootPackage();
+		while (token.hasMoreElements() && current != null) {
 			current = current.getPackage(token.nextToken());
-			while (token.hasMoreElements() && current != null) {
-				current = current.getPackage(token.nextToken());
-			}
 		}
 
 		return current;

src/test/java/spoon/test/compilationunit/TestCompilationUnit.java

@@ -40,10 +40,13 @@
 import java.io.IOException;
 import java.nio.charset.Charset;
 import java.nio.file.Files;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertNotNull;
@@ -132,6 +135,22 @@ public void testCompilationUnitDeclaredTypes() throws IOException {
 		}
 	}
 
+	@Test
+	public void testCompilationUnitInNamedModuleHasDeclaredTypes() {
+		// contract: Compilation units in named modules should have the expected declared types
+
+		final Launcher launcher = new Launcher();
+		launcher.getEnvironment().setComplianceLevel(9);
+		launcher.addInputResource("./src/test/resources/spoon/test/module/simple_module_with_code");
+		launcher.buildModel();
+
+		CtType<?> expectedType = launcher.getFactory().Type().get("fr.simplemodule.pack.SimpleClass");
+		CtCompilationUnit cu = launcher.getFactory().CompilationUnit().getOrCreate(expectedType);
+
+		assertThat(cu.getDeclaredTypes(), equalTo(Collections.singletonList(expectedType)));
+	}
+
+
 	@Test
 	public void testCompilationUnitSourcePosition() throws IOException {
 		// contract: the CompilationUnit has root source position

src/test/java/spoon/test/ctType/CtTypeTest.java

@@ -37,6 +37,7 @@
 import spoon.reflect.visitor.filter.TypeFilter;
 import spoon.test.ctType.testclasses.X;
 
+import java.nio.file.Paths;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
@@ -47,6 +48,7 @@
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
 import static spoon.testing.utils.ModelUtils.buildClass;
 import static spoon.testing.utils.ModelUtils.createFactory;
@@ -248,4 +250,21 @@ public void getUsedTypesWithWildcard() {
 			type.getUsedTypes(false);
 			});
 	}
+
+	@Test
+	public void testTypeDeclarationToReferenceRoundTripInNamedModule() {
+		// contract: It's possible to go from a type declaration, to a reference, and back to the declaration
+		// when the declaration is contained within a named module
+
+		final Launcher launcher = new Launcher();
+		launcher.getEnvironment().setComplianceLevel(9);
+		launcher.addInputResource("./src/test/resources/spoon/test/module/simple_module_with_code");
+		launcher.buildModel();
+
+		CtType<?> typeDecl = launcher.getFactory().Type().get("fr.simplemodule.pack.SimpleClass");
+		CtTypeReference<?> typeRef = typeDecl.getReference();
+		CtType<?> reFetchedTypeDecl = typeRef.getTypeDeclaration();
+
+		assertSame(reFetchedTypeDecl, typeDecl);
+	}
 }

src/test/java/spoon/test/factory/FactoryTest.java

@@ -41,7 +41,10 @@
 import spoon.test.factory.testclasses.Foo;
 
 import java.lang.reflect.Method;
+import java.nio.file.Paths;
 
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
@@ -170,6 +173,23 @@ public void process(CtType element) {
 		assertEquals(0, model.getAllTypes().size());
 	}
 
+	@Test
+	public void testGetPackageFromNamedModule() {
+		// contract: It should be possible to get a package from a named module
+
+		final Launcher launcher = new Launcher();
+		launcher.getEnvironment().setComplianceLevel(9);
+		launcher.addInputResource("./src/test/resources/spoon/test/module/simple_module_with_code");
+		launcher.buildModel();
+
+		String packageName = "fr.simplemodule.pack";
+		CtPackage packageInNamedModule = launcher.getFactory().Package().get(packageName);
+
+		assertNotNull(packageInNamedModule);
+		assertThat(packageInNamedModule.getQualifiedName(), equalTo(packageName));
+	}
+
+
 	public void testIncrementalModel() {
 
 		// contract: one can merge two models together