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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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/*
* @test
* @bug 4891872
* @summary Some tests for the generic core reflection api.
* @author Gilad Bracha
* @compile TestC1.java
* @run main/othervm -ea TestC1
*/
import java.lang.reflect.*;
abstract class C1<T> {
public T ft;
public C1<T> fc1t;
public C1 fc1;
public C1(T t) {}
public abstract C1<T> mc1t(T t, C1<T> c1t, C1 c1);
public abstract C1 mc1();
public abstract T mt(T t);
}
public class TestC1 {
static Class<C1> cls = C1.class;
static {
TestC1.class.getClassLoader().setDefaultAssertionStatus(true);
}
public static void main(String[] args) throws Throwable {
testSuperclass();
testSuperInterfaces();
testTypeParameters();
testMethods();
testConstructor();
testFields();
}
static void testSuperclass() {
System.out.println("testing superclass");
Type sc = cls.getGenericSuperclass();
assert
(sc == Object.class) :
"The generic superclass of C1 should be Object";
}
static void testSuperInterfaces() {
System.out.println("testing superinterfaces");
Type[] sis = cls.getGenericInterfaces();
assert
(sis.length == 0) :
"C1 should have no generic superinterfaces";
}
static void testTypeParameters() {
System.out.println("testing type parameters");
TypeVariable[] tvs = cls.getTypeParameters();
assert
tvs.length == 1 :
"C1 should have one type parameter";
TypeVariable tv = tvs[0];
Type[] bs = tv.getBounds();
assert
bs.length == 1 :
"T should have one bound";
assert
bs[0] == Object.class :
"The default bound of a type variable should be Object";
}
static void testMethods() throws NoSuchMethodException {
System.out.println("testing methods");
Class[] params1 = new Class[3];
params1[0] = Object.class;
params1[1] = cls;
params1[2] = cls;
Class[] params3 = new Class[1];
params3[0] = Object.class;
Method mc1t = cls.getMethod("mc1t", params1);
Method mc1 = cls.getMethod("mc1", new Class[0]);
Method mt = cls.getMethod("mt", params3);
Type rt_mc1t = mc1t.getGenericReturnType();
Type rt_mc1 = mc1.getGenericReturnType();
Type rt_mt = mt.getGenericReturnType();
Type[] pt_mc1t = mc1t.getGenericParameterTypes();
assert
pt_mc1t.length == 3 :
"C1.mc1t has three parameters";
Type p1_mc1t = pt_mc1t[0];
assert p1_mc1t != null;
assert
p1_mc1t instanceof TypeVariable :
"Generic type of the 1st parameter of mc1t(T) is a type variable";
TypeVariable tv = (TypeVariable) p1_mc1t;
assert
tv.getName().equals("T") :
"Name of 1st type parameter of mc1t is T, not " + tv.getName();
Type[] bs = tv.getBounds();
assert
bs.length == 1 :
"T should have one bound (mc1t)";
assert
bs[0] == Object.class :
"The bound of T should be Object (mc1t)";
Type p2_mc1t = pt_mc1t[1];
assert
p2_mc1t instanceof ParameterizedType :
"The type of parameter 2 of mc1t is a parameterized type";
ParameterizedType pt = (ParameterizedType) p2_mc1t;
assert
pt.getRawType() == cls :
"Type of parameter 2 of mc1t is instantiation of C1";
assert
pt.getOwnerType() == null :
"Type of parameter 2 of mc1t is has null owner";
Type[] tas = pt.getActualTypeArguments();
assert
tas.length == 1 :
"The type of parameter 2 of mc1t has one type argument";
Type ta = tas[0];
assert
ta instanceof TypeVariable :
"The actual type arg of C1<T> is a type variable (mc1t)";
tv = (TypeVariable) ta;
assert
tv.getName().equals("T") :
"mc1t: Name of the type arg of C1<T> is T, not " + tv.getName();
bs = tv.getBounds();
assert
bs.length == 1 :
"mc1t: The type argument of C1<T> should have one bound";
assert
bs[0] == Object.class :
"mc1t: The bound of the type arg of C1<T> should be Object";
Type p3_mc1t = pt_mc1t[2];
assert
p3_mc1t == cls :
"Type of parameter 3 of mc1t is C1";
Type[] pt_mc1 = mc1.getGenericParameterTypes();
assert
pt_mc1.length == 0 :
"C1.mc1 has zero parameters";
Type[] pt_mt = mt.getGenericParameterTypes();
assert
pt_mt.length == 1 :
"C1.mt has one parameter";
Type p_mt = pt_mt[0];
assert
p_mt instanceof TypeVariable :
"The generic type of the parameter of mt(T) is a type variable";
tv = (TypeVariable) p_mt;
assert
tv.getName().equals("T") :
"The name of the type parameter of mt is T, not " + tv.getName();
bs = tv.getBounds();
assert
bs.length == 1 :
"T should have one bound";
assert
bs[0] == Object.class :
"The bound of T should be Object";
Type[] et_mc1t = mc1t.getGenericExceptionTypes();
assert
et_mc1t.length == 0 :
"Method C1.mc1t should have no generic exception types";
Type[] et_mc1 = mc1.getGenericExceptionTypes();
assert
et_mc1.length == 0 :
"Method C1.mc1 should have no generic exception types";
Type[] et_mt = mt.getGenericExceptionTypes();
assert
et_mt.length == 0 :
"Method C1.mt should have no generic exception types";
TypeVariable[] tv_mc1t = mc1t.getTypeParameters();
assert
tv_mc1t.length == 0 :
"Method C1.mc1t should have no type parameters";
TypeVariable[] tv_mc1 = mc1.getTypeParameters();
assert
tv_mc1.length == 0 :
"Method C1.mc1 should have no type parameters";
TypeVariable[] tv_mt = mt.getTypeParameters();
assert
tv_mt.length == 0 :
"Method C1.mt should have no type parameters";
}
static void testFields() throws NoSuchFieldException{
System.out.println("testing fields");
Field ft = cls. getField("ft");
Field fc1t = cls. getField("fc1t");
Field fc1 = cls. getField("fc1");
Type gt_ft = ft.getGenericType();
assert
gt_ft instanceof TypeVariable :
"The generic type of C1.ft is a type variable";
TypeVariable tv = (TypeVariable) gt_ft;
assert
tv.getName().equals("T") :
"The name of the type of ft is T, not " + tv.getName();
Type[] bs = tv.getBounds();
assert
bs.length == 1 :
"The type of ft should have one bound";
assert
bs[0] == Object.class :
"The bound of the type of ft should be Object";
Type gt_fc1t = fc1t.getGenericType();
assert
gt_fc1t instanceof ParameterizedType :
"The generic type of C1.fc1t is a parameterized type";
ParameterizedType pt = (ParameterizedType) gt_fc1t;
assert
pt.getRawType() == cls :
"Type of C1.fc1t is instantiation of C1";
assert
pt.getOwnerType() == null :
"Type of C1.fc1t is has null owner";
Type[] tas = pt.getActualTypeArguments();
assert
tas.length == 1 :
"The type of fc1t has one type argument";
Type ta = tas[0];
assert
ta instanceof TypeVariable :
"The actual type arg of C1<T> is a type variable";
tv = (TypeVariable) ta;
assert
tv.getName().equals("T") :
"The name of the type arg of C1<T> is T, not " + tv.getName();
bs = tv.getBounds();
assert
bs.length == 1 :
"The type argument of C1<T> should have one bound";
assert
bs[0] == Object.class :
"The bound of the type arg of C1<T> should be Object";
Type gt_fc1 = fc1.getGenericType();
assert
gt_fc1 == cls :
" Type of C1.fc1 should be C1";
}
static void testConstructor() throws NoSuchMethodException {
System.out.println("testing constructors");
Class[] params = new Class[1];
params[0] = Object.class;
Constructor<C1> con = cls.getDeclaredConstructor(params);
Type[] pt_con = con.getGenericParameterTypes();
assert
pt_con.length == 1 :
"Constructor C1(T) should have one generic parameter type";
Type pt = pt_con[0];
assert
pt instanceof TypeVariable :
"The generic type of the parameter of C1(T) is a type variable";
TypeVariable tv = (TypeVariable) pt;
assert
tv.getName().equals("T") :
"The name of the type parameter of C is T, not " + tv.getName();
Type[] bs = tv.getBounds();
assert
bs.length == 1 :
"T should have one bound";
assert
bs[0] == Object.class :
"The bound of T should be Object";
Type[] et_con = con.getGenericExceptionTypes();
assert
et_con.length == 0 :
"Constructor C1(T) should have no generic exception types";
TypeVariable[] tv_con = con.getTypeParameters();
assert
tv_con.length == 0 :
"Constructor C1(T) should have no type parameters";
}
}