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* version 2 for more details (a copy is included in the LICENSE file that
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* 2 along with this work; if not, write to the Free Software Foundation,
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/* @test
* @bug 8057919
* @summary Class.getSimpleName() should work for non-JLS compliant class names
* @modules java.base/jdk.internal.org.objectweb.asm
*/
import jdk.internal.org.objectweb.asm.*;
import static jdk.internal.org.objectweb.asm.Opcodes.*;
public class GetSimpleNameTest {
static class NestedClass {}
class InnerClass {}
static Class<?> f1() {
class LocalClass {}
return LocalClass.class;
}
public static void main(String[] args) throws Exception {
assertEquals(NestedClass.class.getSimpleName(), "NestedClass");
assertEquals( InnerClass.class.getSimpleName(), "InnerClass");
assertEquals( f1().getSimpleName(), "LocalClass");
java.io.Serializable anon = new java.io.Serializable() {};
assertEquals(anon.getClass().getSimpleName(), "");
// Java class names, prepended enclosing class name.
testNested("p.Outer$Nested", "p.Outer", "Nested");
testInner( "p.Outer$Inner", "p.Inner", "Inner");
testLocal( "p.Outer$1Local", "p.Outer", "Local");
testAnon( "p.Outer$1", "p.Outer", "");
// Non-Java class names, prepended enclosing class name.
testNested("p.$C1$Nested", "p.$C1$", "Nested");
testInner( "p.$C1$Inner", "p.$C1$", "Inner");
testLocal( "p.$C1$Local", "p.$C1$", "Local");
testAnon( "p.$C1$1", "p.$C1$", "");
// Non-Java class names, unrelated class names.
testNested("p1.$Nested$", "p2.$C1$", "Nested");
testInner( "p1.$Inner$", "p2.$C1$", "Inner");
testLocal( "p1.$Local$", "p2.$C1$", "Local");
testAnon( "p1.$anon$", "p2.$C1$", "");
}
static void testNested(String innerName, String outerName, String simpleName) throws Exception {
BytecodeGenerator bg = new BytecodeGenerator(innerName, outerName, simpleName);
CustomCL cl = new CustomCL(innerName, outerName, bg.getNestedClasses(true), bg.getNestedClasses(false));
assertEquals(cl.loadClass(innerName).getSimpleName(), simpleName);
}
static void testInner(String innerName, String outerName, String simpleName) throws Exception {
BytecodeGenerator bg = new BytecodeGenerator(innerName, outerName, simpleName);
CustomCL cl = new CustomCL(innerName, outerName, bg.getInnerClasses(true), bg.getInnerClasses(false));
assertEquals(cl.loadClass(innerName).getSimpleName(), simpleName);
}
static void testLocal(String innerName, String outerName, String simpleName) throws Exception {
BytecodeGenerator bg = new BytecodeGenerator(innerName, outerName, simpleName);
CustomCL cl = new CustomCL(innerName, outerName, bg.getLocalClasses(true), bg.getLocalClasses(false));
assertEquals(cl.loadClass(innerName).getSimpleName(), simpleName);
}
static void testAnon(String innerName, String outerName, String simpleName) throws Exception {
BytecodeGenerator bg = new BytecodeGenerator(innerName, outerName, simpleName);
CustomCL cl = new CustomCL(innerName, outerName, bg.getAnonymousClasses(true), bg.getAnonymousClasses(false));
assertEquals(cl.loadClass(innerName).getSimpleName(), simpleName);
}
static void assertEquals(Object o1, Object o2) {
if (!java.util.Objects.equals(o1, o2)) {
throw new AssertionError(o1 + " != " + o2);
}
}
static class CustomCL extends ClassLoader {
final String innerName;
final String outerName;
final byte[] innerClassFile;
final byte[] outerClassFile;
CustomCL(String innerName, String outerName, byte[] innerClassFile, byte[] outerClassFile) {
this.innerName = innerName;
this.outerName = outerName;
this.innerClassFile = innerClassFile;
this.outerClassFile = outerClassFile;
}
@Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
if (innerName.equals(name)) {
return defineClass(innerName, innerClassFile, 0, innerClassFile.length);
} else if (outerName.equals(name)) {
return defineClass(outerName, outerClassFile, 0, outerClassFile.length);
} else {
throw new ClassNotFoundException(name);
}
}
}
static class BytecodeGenerator {
final String innerName;
final String outerName;
final String simpleName;
BytecodeGenerator(String innerName, String outerName, String simpleName) {
this.innerName = intl(innerName);
this.outerName = intl(outerName);
this.simpleName = simpleName;
}
static String intl(String name) { return name.replace('.', '/'); }
static void makeDefaultCtor(ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
void makeCtxk(ClassWriter cw, boolean isInner) {
if (isInner) {
cw.visitOuterClass(outerName, "f", "()V");
} else {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "f", "()V", null, null);
mv.visitCode();
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
}
byte[] getNestedClasses(boolean isInner) {
String name = (isInner ? innerName : outerName);
ClassWriter cw = new ClassWriter(0);
cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, name, null, "java/lang/Object", null);
cw.visitInnerClass(innerName, outerName, simpleName, ACC_PUBLIC | ACC_STATIC);
makeDefaultCtor(cw);
cw.visitEnd();
return cw.toByteArray();
}
byte[] getInnerClasses(boolean isInner) {
String name = (isInner ? innerName : outerName);
ClassWriter cw = new ClassWriter(0);
cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, name, null, "java/lang/Object", null);
cw.visitInnerClass(innerName, outerName, simpleName, ACC_PUBLIC);
makeDefaultCtor(cw);
cw.visitEnd();
return cw.toByteArray();
}
byte[] getLocalClasses(boolean isInner) {
String name = (isInner ? innerName : outerName);
ClassWriter cw = new ClassWriter(0);
cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, name, null, "java/lang/Object", null);
cw.visitInnerClass(innerName, null, simpleName, ACC_PUBLIC | ACC_STATIC);
makeCtxk(cw, isInner);
makeDefaultCtor(cw);
cw.visitEnd();
return cw.toByteArray();
}
byte[] getAnonymousClasses(boolean isInner) {
String name = (isInner ? innerName : outerName);
ClassWriter cw = new ClassWriter(0);
cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, name, null, "java/lang/Object", null);
cw.visitInnerClass(innerName, null, null, ACC_PUBLIC | ACC_STATIC);
makeCtxk(cw, isInner);
makeDefaultCtor(cw);
cw.visitEnd();
return cw.toByteArray();
}
}
}