@SuppressWarnings("unchecked")
private void doTestCache() {
for (int i = 0; i < toConstruct.length; i++) {
Class cl = toConstruct[i];
Object x = ReflectionUtils.newInstance(cl, null);
Object y = ReflectionUtils.newInstance(cl, null);
assertEquals(cl, x.getClass());
assertEquals(cl, y.getClass());
}
}
@Test
public void isCglibRenamedMethod() throws SecurityException, NoSuchMethodException {
@SuppressWarnings("unused")
class C {
public void CGLIB$m1$123() {}
public void CGLIB$m1$0() {}
public void CGLIB$$0() {}
public void CGLIB$m1$() {}
public void CGLIB$m1() {}
public void m1() {}
public void m1$() {}
public void m1$1() {}
}
assertTrue(ReflectionUtils.isCglibRenamedMethod(C.class.getMethod("CGLIB$m1$123")));
assertTrue(ReflectionUtils.isCglibRenamedMethod(C.class.getMethod("CGLIB$m1$0")));
assertFalse(ReflectionUtils.isCglibRenamedMethod(C.class.getMethod("CGLIB$$0")));
assertFalse(ReflectionUtils.isCglibRenamedMethod(C.class.getMethod("CGLIB$m1$")));
assertFalse(ReflectionUtils.isCglibRenamedMethod(C.class.getMethod("CGLIB$m1")));
assertFalse(ReflectionUtils.isCglibRenamedMethod(C.class.getMethod("m1")));
assertFalse(ReflectionUtils.isCglibRenamedMethod(C.class.getMethod("m1$")));
assertFalse(ReflectionUtils.isCglibRenamedMethod(C.class.getMethod("m1$1")));
}
@Test
public void setField() {
TestObjectSubclassWithNewField testBean = new TestObjectSubclassWithNewField();
Field field =
ReflectionUtils.findField(TestObjectSubclassWithNewField.class, "name", String.class);
ReflectionUtils.makeAccessible(field);
ReflectionUtils.setField(field, testBean, "FooBar");
assertNotNull(testBean.getName());
assertEquals("FooBar", testBean.getName());
ReflectionUtils.setField(field, testBean, null);
assertNull(testBean.getName());
}
@Test
public void getUniqueDeclaredMethods_withCovariantReturnType() throws Exception {
class Parent {
@SuppressWarnings("unused")
public Number m1() {
return new Integer(42);
}
}
class Leaf extends Parent {
@Override
public Integer m1() {
return new Integer(42);
}
}
int m1MethodCount = 0;
Method[] methods = ReflectionUtils.getUniqueDeclaredMethods(Leaf.class);
for (Method method : methods) {
if (method.getName().equals("m1")) {
m1MethodCount++;
}
}
assertThat(m1MethodCount, is(1));
assertTrue(ObjectUtils.containsElement(methods, Leaf.class.getMethod("m1")));
assertFalse(ObjectUtils.containsElement(methods, Parent.class.getMethod("m1")));
}
@Test
public void invokeMethod() throws Exception {
String rob = "Rob Harrop";
TestObject bean = new TestObject();
bean.setName(rob);
Method getName = TestObject.class.getMethod("getName", (Class[]) null);
Method setName = TestObject.class.getMethod("setName", String.class);
Object name = ReflectionUtils.invokeMethod(getName, bean);
assertEquals("Incorrect name returned", rob, name);
String juergen = "Juergen Hoeller";
ReflectionUtils.invokeMethod(setName, bean, juergen);
assertEquals("Incorrect name set", juergen, bean.getName());
}
@Test
public void testCache() throws Exception {
assertEquals(0, cacheSize());
doTestCache();
assertEquals(toConstruct.length, cacheSize());
ReflectionUtils.clearCache();
assertEquals(0, cacheSize());
}
@Test
public void testCantCreate() {
try {
ReflectionUtils.newInstance(NoDefaultCtor.class, null);
fail("invalid call should fail");
} catch (RuntimeException rte) {
assertEquals(NoSuchMethodException.class, rte.getCause().getClass());
}
}
private void testValidCopy(TestObject src, TestObject dest) {
src.setName("freddie");
src.setAge(15);
src.setSpouse(new TestObject());
assertFalse(src.getAge() == dest.getAge());
ReflectionUtils.shallowCopyFieldState(src, dest);
assertEquals(src.getAge(), dest.getAge());
assertEquals(src.getSpouse(), dest.getSpouse());
}
@Test
public void duplicatesFound() {
ListSavingMethodCallback mc = new ListSavingMethodCallback();
ReflectionUtils.doWithMethods(TestObjectSubclass.class, mc);
int absquatulateCount = 0;
for (String name : mc.getMethodNames()) {
if (name.equals("absquatulate")) {
++absquatulateCount;
}
}
assertEquals("Found 2 absquatulates", 2, absquatulateCount);
}
@Test
public void declaresException() throws Exception {
Method remoteExMethod = A.class.getDeclaredMethod("foo", Integer.class);
assertTrue(ReflectionUtils.declaresException(remoteExMethod, RemoteException.class));
assertTrue(ReflectionUtils.declaresException(remoteExMethod, ConnectException.class));
assertFalse(ReflectionUtils.declaresException(remoteExMethod, NoSuchMethodException.class));
assertFalse(ReflectionUtils.declaresException(remoteExMethod, Exception.class));
Method illegalExMethod = B.class.getDeclaredMethod("bar", String.class);
assertTrue(ReflectionUtils.declaresException(illegalExMethod, IllegalArgumentException.class));
assertTrue(ReflectionUtils.declaresException(illegalExMethod, NumberFormatException.class));
assertFalse(ReflectionUtils.declaresException(illegalExMethod, IllegalStateException.class));
assertFalse(ReflectionUtils.declaresException(illegalExMethod, Exception.class));
}
@Test
public void testGetDeclaredFieldsIncludingInherited() {
Parent child =
new Parent() {
private int childField;
@SuppressWarnings("unused")
public int getChildField() {
return childField;
}
};
List<Field> fields = ReflectionUtils.getDeclaredFieldsIncludingInherited(child.getClass());
boolean containsParentField = false;
boolean containsChildField = false;
for (Field field : fields) {
if (field.getName().equals("parentField")) {
containsParentField = true;
} else if (field.getName().equals("childField")) {
containsChildField = true;
}
}
List<Method> methods = ReflectionUtils.getDeclaredMethodsIncludingInherited(child.getClass());
boolean containsParentMethod = false;
boolean containsChildMethod = false;
for (Method method : methods) {
if (method.getName().equals("getParentField")) {
containsParentMethod = true;
} else if (method.getName().equals("getChildField")) {
containsChildMethod = true;
}
}
assertTrue("Missing parent field", containsParentField);
assertTrue("Missing child field", containsChildField);
assertTrue("Missing parent method", containsParentMethod);
assertTrue("Missing child method", containsChildMethod);
}
@Test
public void findField() {
Field field =
ReflectionUtils.findField(
TestObjectSubclassWithPublicField.class, "publicField", String.class);
assertNotNull(field);
assertEquals("publicField", field.getName());
assertEquals(String.class, field.getType());
assertTrue("Field should be public.", Modifier.isPublic(field.getModifiers()));
field = ReflectionUtils.findField(TestObjectSubclassWithNewField.class, "prot", String.class);
assertNotNull(field);
assertEquals("prot", field.getName());
assertEquals(String.class, field.getType());
assertTrue("Field should be protected.", Modifier.isProtected(field.getModifiers()));
field = ReflectionUtils.findField(TestObjectSubclassWithNewField.class, "name", String.class);
assertNotNull(field);
assertEquals("name", field.getName());
assertEquals(String.class, field.getType());
assertTrue("Field should be private.", Modifier.isPrivate(field.getModifiers()));
}
@SuppressWarnings("unchecked")
@Test
public void testCacheDoesntLeak() throws Exception {
int iterations = 9999; // very fast, but a bit less reliable - bigger numbers force GC
for (int i = 0; i < iterations; i++) {
URLClassLoader loader = new URLClassLoader(new URL[0], getClass().getClassLoader());
Class cl =
Class.forName("org.apache.hadoop.util.TestReflectionUtils$LoadedInChild", false, loader);
Object o = ReflectionUtils.newInstance(cl, null);
assertEquals(cl, o.getClass());
}
System.gc();
assertTrue(cacheSize() + " too big", cacheSize() < iterations);
}
@Test
public void getUniqueDeclaredMethods() throws Exception {
class Foo {
@Override
public String toString() {
return super.toString();
}
}
int toStringMethodCount = 0;
for (Method method : ReflectionUtils.getUniqueDeclaredMethods(Foo.class)) {
if (method.getName().equals("toString")) {
toStringMethodCount++;
}
}
assertThat(toStringMethodCount, is(1));
}
@Test
public void doWithProtectedMethods() {
ListSavingMethodCallback mc = new ListSavingMethodCallback();
ReflectionUtils.doWithMethods(
TestObject.class,
mc,
new ReflectionUtils.MethodFilter() {
@Override
public boolean matches(Method m) {
return Modifier.isProtected(m.getModifiers());
}
});
assertFalse(mc.getMethodNames().isEmpty());
assertTrue("Must find protected method on Object", mc.getMethodNames().contains("clone"));
assertTrue("Must find protected method on Object", mc.getMethodNames().contains("finalize"));
assertFalse("Public, not protected", mc.getMethodNames().contains("hashCode"));
assertFalse("Public, not protected", mc.getMethodNames().contains("absquatulate"));
}
@Test
public void getUniqueDeclaredMethods_isFastEnough() {
Assume.group(TestGroup.PERFORMANCE);
@SuppressWarnings("unused")
class C {
void m00() {}
void m01() {}
void m02() {}
void m03() {}
void m04() {}
void m05() {}
void m06() {}
void m07() {}
void m08() {}
void m09() {}
void m10() {}
void m11() {}
void m12() {}
void m13() {}
void m14() {}
void m15() {}
void m16() {}
void m17() {}
void m18() {}
void m19() {}
void m20() {}
void m21() {}
void m22() {}
void m23() {}
void m24() {}
void m25() {}
void m26() {}
void m27() {}
void m28() {}
void m29() {}
void m30() {}
void m31() {}
void m32() {}
void m33() {}
void m34() {}
void m35() {}
void m36() {}
void m37() {}
void m38() {}
void m39() {}
void m40() {}
void m41() {}
void m42() {}
void m43() {}
void m44() {}
void m45() {}
void m46() {}
void m47() {}
void m48() {}
void m49() {}
void m50() {}
void m51() {}
void m52() {}
void m53() {}
void m54() {}
void m55() {}
void m56() {}
void m57() {}
void m58() {}
void m59() {}
void m60() {}
void m61() {}
void m62() {}
void m63() {}
void m64() {}
void m65() {}
void m66() {}
void m67() {}
void m68() {}
void m69() {}
void m70() {}
void m71() {}
void m72() {}
void m73() {}
void m74() {}
void m75() {}
void m76() {}
void m77() {}
void m78() {}
void m79() {}
void m80() {}
void m81() {}
void m82() {}
void m83() {}
void m84() {}
void m85() {}
void m86() {}
void m87() {}
void m88() {}
void m89() {}
void m90() {}
void m91() {}
void m92() {}
void m93() {}
void m94() {}
void m95() {}
void m96() {}
void m97() {}
void m98() {}
void m99() {}
}
StopWatch sw = new StopWatch();
sw.start();
Method[] methods = ReflectionUtils.getUniqueDeclaredMethods(C.class);
sw.stop();
long totalMs = sw.getTotalTimeMillis();
assertThat(methods.length, Matchers.greaterThan(100));
assertThat(totalMs, Matchers.lessThan(10L));
}
@Test(expected = IllegalArgumentException.class)
public void rejectsNullDest() {
TestObject src = new TestObject();
String dest = null;
ReflectionUtils.shallowCopyFieldState(src, dest);
}
private int cacheSize() throws Exception {
return ReflectionUtils.getCacheSize();
}
@Test
public void findMethod() throws Exception {
assertNotNull(ReflectionUtils.findMethod(B.class, "bar", String.class));
assertNotNull(ReflectionUtils.findMethod(B.class, "foo", Integer.class));
assertNotNull(ReflectionUtils.findMethod(B.class, "getClass"));
}
@Before
public void setUp() {
ReflectionUtils.clearCache();
}
@Ignore("[SPR-8644] findMethod() does not currently support var-args")
@Test
public void findMethodWithVarArgs() throws Exception {
assertNotNull(ReflectionUtils.findMethod(B.class, "add", int.class, int.class, int.class));
}
@Test(expected = IllegalArgumentException.class)
public void copySrcToDestinationOfIncorrectClass() {
TestObject src = new TestObject();
String dest = new String();
ReflectionUtils.shallowCopyFieldState(src, dest);
}
