/*
* 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 libcore.java.lang.reflect;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import org.apache.harmony.tests.java.lang.reflect.GenericReflectionTestsBase;
/**
* Tests type parameters declared on classes.
*/
public class OldGenericTypesTest extends GenericReflectionTestsBase {
static class GenericType<T>{
T methodGenericType(T t){ return t;}
@SuppressWarnings("hiding")
<T> T hidingMethodGenericType(T t){ return t;}
static <T> T staticMethodGenericType(T t){ return t;}
}
static class MultipleBoundedGenericTypes<T,S extends T>{
void multipleBoundedGenericTypesTS(T t, S s){}
}
static class SimpleInheritance <T> extends GenericType<T>{}
static class ConstructorGenericType<T>{
ConstructorGenericType(T t){}
}
static class InnerClassTest<T>{
class InnerClass {
InnerClass(T t) {}
void innerMethod(T t){}
}
}
static class ExceptionTest<T extends Exception>{
void exceptionTest() throws T{}
class InnerClass{
void innerExceptionTest() throws T{}
}
}
static interface InterfaceTest<T>{}
@SuppressWarnings("unchecked")
public void testConstructorGenericType() throws Exception {
Class<? extends ConstructorGenericType> clazz = ConstructorGenericType.class;
TypeVariable<Class> typeVariable = getTypeParameter(clazz);
Constructor<?> constructor = clazz.getDeclaredConstructor(Object.class);
Type[] genericParameterTypes = constructor.getGenericParameterTypes();
assertLenghtOne(genericParameterTypes);
Type parameterType = genericParameterTypes[0];
assertEquals(typeVariable, parameterType);
}
@SuppressWarnings("unchecked")
public void testStaticMethodGenericType() throws Exception {
Class<? extends GenericType> clazz = GenericType.class;
TypeVariable<Class> typeVariable = getTypeParameter(clazz);
Method method = clazz.getDeclaredMethod("staticMethodGenericType", Object.class);
Type[] genericParameterTypes = method.getGenericParameterTypes();
assertLenghtOne(genericParameterTypes);
Type parameterType = genericParameterTypes[0];
assertNotEquals(typeVariable, parameterType);
assertInstanceOf(TypeVariable.class, parameterType);
assertEquals(method, ((TypeVariable)parameterType).getGenericDeclaration());
}
@SuppressWarnings("unchecked")
public void testHidingMethodGenericType() throws Exception {
Class<? extends GenericType> clazz = GenericType.class;
TypeVariable<Class> typeVariable = getTypeParameter(clazz);
Method method = clazz.getDeclaredMethod("hidingMethodGenericType", Object.class);
Type[] genericParameterTypes = method.getGenericParameterTypes();
assertLenghtOne(genericParameterTypes);
Type parameterType = genericParameterTypes[0];
assertNotEquals(typeVariable, parameterType);
assertInstanceOf(TypeVariable.class, parameterType);
assertEquals(method, ((TypeVariable)parameterType).getGenericDeclaration());
}
static class MultipleGenericTypes<T,S>{
void multipleGenericTypesT(T t){}
void multipleGenericTypesS(S s){}
void multipleGenericTypesTS(T t, S s){}
}
@SuppressWarnings("unchecked")
public void testMultipleGenericTypes() throws Exception {
//Type parameters
Class<? extends MultipleGenericTypes> clazz = MultipleGenericTypes.class;
TypeVariable<?>[] typeParameters = clazz.getTypeParameters();
assertEquals(2, typeParameters.length);
TypeVariable<?> typeVariableT = typeParameters[0];
assertEquals(clazz, typeVariableT.getGenericDeclaration());
assertEquals("T", typeVariableT.getName());
TypeVariable<?> typeVariableS = typeParameters[1];
assertEquals("S", typeVariableS.getName());
assertEquals(clazz, typeVariableS.getGenericDeclaration());
// multipleGenericTypesT
Method multipleGenericTypesT = clazz.getDeclaredMethod("multipleGenericTypesT", new Class[]{Object.class});
Type[] multipleGenericTypesTTypes = multipleGenericTypesT.getGenericParameterTypes();
assertLenghtOne(multipleGenericTypesTTypes);
Type multipleGenericTypesTType = multipleGenericTypesTTypes[0];
assertEquals(typeVariableT, multipleGenericTypesTType);
// multipleGenericTypesS
Method multipleGenericTypesS = clazz.getDeclaredMethod("multipleGenericTypesS", new Class[]{Object.class});
Type[] multipleGenericTypesSTypes = multipleGenericTypesS.getGenericParameterTypes();
assertLenghtOne(multipleGenericTypesSTypes);
Type multipleGenericTypesSType = multipleGenericTypesSTypes[0];
assertEquals(typeVariableS, multipleGenericTypesSType);
// multipleGenericTypesS
Method multipleGenericTypesTS = clazz.getDeclaredMethod("multipleGenericTypesTS", new Class[]{Object.class, Object.class});
Type[] multipleGenericTypesTSTypes = multipleGenericTypesTS.getGenericParameterTypes();
assertEquals(2, multipleGenericTypesTSTypes.length);
Type multipleGenericTypesTSTypeT = multipleGenericTypesTSTypes[0];
assertEquals(typeVariableT, multipleGenericTypesTSTypeT);
Type multipleGenericTypesTSTypeS = multipleGenericTypesTSTypes[1];
assertEquals(typeVariableS, multipleGenericTypesTSTypeS);
}
@SuppressWarnings("unchecked")
public void testMultipleBoundedGenericTypes() throws Exception {
//Type parameters
Class<? extends MultipleBoundedGenericTypes> clazz = MultipleBoundedGenericTypes.class;
TypeVariable<?>[] typeParameters = clazz.getTypeParameters();
assertEquals(2, typeParameters.length);
TypeVariable<?> typeVariableT = typeParameters[0];
assertEquals(clazz, typeVariableT.getGenericDeclaration());
assertEquals("T", typeVariableT.getName());
TypeVariable<?> typeVariableS = typeParameters[1];
assertEquals("S", typeVariableS.getName());
assertEquals(clazz, typeVariableS.getGenericDeclaration());
Type[] boundsS = typeVariableS.getBounds();
assertLenghtOne(boundsS);
Type boundS = boundsS[0];
assertEquals(typeVariableT, boundS);
}
@SuppressWarnings("unchecked")
public void testSimpleInheritance() throws Exception {
Class<? extends SimpleInheritance> clazz = SimpleInheritance.class;
TypeVariable<Class> subTypeVariable = getTypeParameter(clazz);
assertInstanceOf(ParameterizedType.class, clazz.getGenericSuperclass());
ParameterizedType parameterizedSuperType = (ParameterizedType) clazz.getGenericSuperclass();
assertInstanceOf(Class.class, parameterizedSuperType.getRawType());
TypeVariable<Class> superTypeParameter = getTypeParameter((Class<?>)parameterizedSuperType.getRawType());
TypeVariable<Class> typeParameter = getTypeParameter(GenericType.class);
assertEquals(superTypeParameter, typeParameter);
assertNotEquals(subTypeVariable, superTypeParameter);
Type[] actualTypeArguments = parameterizedSuperType.getActualTypeArguments();
assertLenghtOne(actualTypeArguments);
assertInstanceOf(TypeVariable.class, actualTypeArguments[0]);
TypeVariable actualSuperTypeVariable = (TypeVariable) actualTypeArguments[0];
assertEquals(subTypeVariable, actualSuperTypeVariable);
}
@SuppressWarnings("unchecked")
public void testInnerClassTest() throws Exception {
Class<? extends InnerClassTest> clazz =InnerClassTest.class;
TypeVariable<Class> typeVariable = getTypeParameter(clazz);
Class<?>[] declaredClasses = clazz.getDeclaredClasses();
assertLenghtOne(declaredClasses);
Class<?> innerClazz = declaredClasses[0];
assertEquals(InnerClassTest.InnerClass.class, innerClazz);
//constructor
Constructor<?>[] declaredConstructors = innerClazz.getDeclaredConstructors();
assertLenghtOne(declaredConstructors);
Constructor<?> declaredConstructor = declaredConstructors[0];
Type[] genericParameterTypes = declaredConstructor.getGenericParameterTypes();
assertLenghtOne(genericParameterTypes);
assertEquals(typeVariable, genericParameterTypes[0]);
assertInstanceOf(TypeVariable.class, genericParameterTypes[0]);
TypeVariable<?> constructorTypeVariable = (TypeVariable<?>) genericParameterTypes[0];
assertEquals(clazz ,constructorTypeVariable.getGenericDeclaration());
//method
Method declaredMethods = innerClazz.getDeclaredMethod("innerMethod", Object.class);
Type[] methodParameterTypes = declaredMethods.getGenericParameterTypes();
assertLenghtOne(methodParameterTypes);
assertEquals(typeVariable, methodParameterTypes[0]);
assertInstanceOf(TypeVariable.class, methodParameterTypes[0]);
TypeVariable<?> methodTypeVariable = (TypeVariable<?>) methodParameterTypes[0];
assertEquals(clazz, methodTypeVariable.getGenericDeclaration());
}
@SuppressWarnings("unchecked")
public void testException() throws Exception {
Class<? extends ExceptionTest> clazz = ExceptionTest.class;
TypeVariable<Class> typeVariable = getTypeParameter(clazz);
Method method = clazz.getDeclaredMethod("exceptionTest");
Type[] genericExceptionTypes = method.getGenericExceptionTypes();
assertLenghtOne(genericExceptionTypes);
assertEquals(typeVariable, genericExceptionTypes[0]);
Class<?>[] declaredClasses = clazz.getDeclaredClasses();
assertLenghtOne(declaredClasses);
Class<?> innerClazz = declaredClasses[0];
assertEquals(ExceptionTest.InnerClass.class, innerClazz);
//method
Method declaredMethods = innerClazz.getDeclaredMethod("innerExceptionTest");
Type[] exceptionTypes = declaredMethods.getGenericExceptionTypes();
assertLenghtOne(exceptionTypes);
assertEquals(typeVariable, exceptionTypes[0]);
assertInstanceOf(TypeVariable.class, exceptionTypes[0]);
TypeVariable<?> methodTypeVariable = (TypeVariable<?>) exceptionTypes[0];
assertEquals(clazz, methodTypeVariable.getGenericDeclaration());
}
}