| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package tests.api.java.lang.reflect; |
| |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Type; |
| import java.lang.reflect.TypeVariable; |
| |
| /** |
| * Tests bounded type parameters declared on methods. |
| */ |
| public class BoundedGenericMethodsTests extends GenericReflectionTestsBase { |
| @SuppressWarnings("unchecked") |
| static class BoundedGenericMethods<S> { |
| |
| public <T extends BoundedGenericMethods> void noParamNoReturn() {} |
| public <T extends BoundedGenericMethods> void paramNoReturn(T param) {} |
| |
| public <T extends BoundedGenericMethods> T noParamReturn() { |
| return (T) new Object(); |
| } |
| public <T extends BoundedGenericMethods> T paramReturn(T t) { |
| return t; |
| } |
| } |
| @SuppressWarnings("unchecked") |
| private static Class<? extends BoundedGenericMethods> clazz = BoundedGenericMethodsTests.BoundedGenericMethods.class; |
| |
| /** |
| * Tests whether the type parameter is upper bounded by BoundedGenericMethods. |
| * <T extends BoundedGenericMethods>. |
| * |
| * @param method |
| * the declaring method |
| */ |
| private void checkBoundedTypeParameter(Method method) { |
| TypeVariable<Method> typeParameter = getTypeParameter(method); |
| assertEquals("T", typeParameter.getName()); |
| assertEquals(method, typeParameter.getGenericDeclaration()); |
| |
| Type[] bounds = typeParameter.getBounds(); |
| assertLenghtOne(bounds); |
| Type bound = bounds[0]; |
| assertEquals(BoundedGenericMethods.class, bound); |
| } |
| |
| /** |
| * Tests whether the specified method declares a parameter with the type of |
| * the type parameter. |
| * |
| * @param method |
| * the declaring method |
| */ |
| private void parameterType(Method method) { |
| TypeVariable<Method> typeParameter = getTypeParameter(method); |
| assertLenghtOne(method.getGenericParameterTypes()); |
| Type genericParameterType = method.getGenericParameterTypes()[0]; |
| assertEquals(typeParameter, genericParameterType); |
| assertTrue(genericParameterType instanceof TypeVariable); |
| TypeVariable<?> typeVariable = (TypeVariable<?>) genericParameterType; |
| assertEquals(method, typeVariable.getGenericDeclaration()); |
| |
| Type[] paramBounds = typeVariable.getBounds(); |
| assertLenghtOne(paramBounds); |
| Type paramBound = paramBounds[0]; |
| assertEquals(BoundedGenericMethods.class, paramBound); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private void checkReturnType(Method method) { |
| Type genericReturnType = method.getGenericReturnType(); |
| assertEquals(getTypeParameter(method), genericReturnType); |
| assertTrue(genericReturnType instanceof TypeVariable); |
| |
| TypeVariable<Method> returnTypeVariable = (TypeVariable<Method>) genericReturnType; |
| assertEquals(method, returnTypeVariable.getGenericDeclaration()); |
| |
| Type[] bounds = returnTypeVariable.getBounds(); |
| assertLenghtOne(bounds); |
| Type bound = bounds[0]; |
| |
| assertEquals(BoundedGenericMethods.class, bound); |
| } |
| |
| |
| |
| /** |
| * Tests that there are is one Type Parameter on the Class itself. |
| */ |
| public void testBoundedGenericMethods() { |
| assertLenghtOne(clazz.getTypeParameters()); |
| } |
| public void testNoParamNoReturn() throws SecurityException, NoSuchMethodException { |
| Method method = clazz.getMethod("noParamNoReturn"); |
| checkBoundedTypeParameter(method); |
| } |
| public void testUnboundedParamNoReturn() throws SecurityException, NoSuchMethodException { |
| Method method = clazz.getMethod("paramNoReturn", BoundedGenericMethods.class); |
| checkBoundedTypeParameter(method); |
| parameterType(method); |
| } |
| public void testNoParamReturn() throws SecurityException, NoSuchMethodException { |
| Method method = clazz.getMethod("noParamReturn"); |
| checkBoundedTypeParameter(method); |
| assertLenghtZero(method.getGenericParameterTypes()); |
| checkReturnType(method); |
| } |
| public void testUnboundedParamReturn() throws SecurityException, NoSuchMethodException { |
| Method method = clazz.getMethod("paramReturn", BoundedGenericMethods.class); |
| checkBoundedTypeParameter(method); |
| parameterType(method); |
| checkReturnType(method); |
| } |
| } |