| /* |
| * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * 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). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import java.beans.BeanInfo; |
| import java.beans.Introspector; |
| import java.beans.PropertyDescriptor; |
| import java.lang.reflect.Method; |
| |
| /** |
| * @test |
| * @bug 8196373 |
| * @summary Introspector should work with overridden generic getter method |
| */ |
| public final class OverriddenGenericGetter { |
| |
| static class Parent<T> { |
| private T value; |
| public T getValue() {return value;} |
| public final void setValue(T value) {this.value = value;} |
| } |
| |
| static class ChildO extends Parent<Object> { |
| public ChildO() {} |
| @Override |
| public Object getValue() {return super.getValue();} |
| } |
| |
| static class ChildA extends Parent<ArithmeticException> { |
| public ChildA() {} |
| @Override |
| public ArithmeticException getValue() {return super.getValue();} |
| } |
| |
| static class ChildS extends Parent<String> { |
| public ChildS() {} |
| @Override |
| public String getValue() {return super.getValue();} |
| } |
| |
| public static void main(String[] args) throws Exception { |
| testBehaviour(ChildA.class); |
| testBehaviour(ChildO.class); |
| testBehaviour(ChildS.class); |
| test(ChildA.class, ArithmeticException.class); |
| test(ChildO.class, Object.class); |
| test(ChildS.class, String.class); |
| } |
| |
| private static void testBehaviour(Class<?> beanClass) throws Exception { |
| BeanInfo beanInfo = Introspector.getBeanInfo(beanClass, Object.class); |
| PropertyDescriptor pd = beanInfo.getPropertyDescriptors()[0]; |
| Object bean = beanClass.getConstructor().newInstance(); |
| Method readMethod = pd.getReadMethod(); |
| Method writeMethod = pd.getWriteMethod(); |
| |
| // check roundtrip for default null values |
| writeMethod.invoke(bean,readMethod.invoke(bean)); |
| writeMethod.invoke(bean,readMethod.invoke(bean)); |
| |
| // set property to non-default value |
| // check roundtrip for non-default values |
| Object param = pd.getPropertyType().getConstructor().newInstance(); |
| writeMethod.invoke(bean, param); |
| writeMethod.invoke(bean, readMethod.invoke(bean)); |
| writeMethod.invoke(bean, readMethod.invoke(bean)); |
| } |
| |
| private static void test(Class<?> beanClass, Class<?> type) throws Exception { |
| BeanInfo beanInfo = Introspector.getBeanInfo(beanClass, Object.class); |
| PropertyDescriptor[] pds = beanInfo.getPropertyDescriptors(); |
| if (pds.length != 1) { |
| throw new RuntimeException("Wrong number of properties"); |
| } |
| PropertyDescriptor pd = pds[0]; |
| String name = pd.getName(); |
| if (!name.equals("value")) { |
| throw new RuntimeException("Wrong name: " + name); |
| } |
| |
| Class<?> propertyType = pd.getPropertyType(); |
| if (propertyType != type) { |
| throw new RuntimeException("Wrong property type: " + propertyType); |
| } |
| Method readMethod = pd.getReadMethod(); |
| if (readMethod == null) { |
| throw new RuntimeException("Read method is null"); |
| } |
| Class<?> returnType = readMethod.getReturnType(); |
| if (returnType != type) { |
| throw new RuntimeException("Wrong return type; " + returnType); |
| } |
| Method writeMethod = pd.getWriteMethod(); |
| if (writeMethod == null) { |
| throw new RuntimeException("Write method is null"); |
| } |
| Class<?>[] parameterTypes = writeMethod.getParameterTypes(); |
| if (parameterTypes.length != 1) { |
| throw new RuntimeException("Wrong parameters " + parameterTypes); |
| } |
| if (parameterTypes[0] != Object.class) { |
| throw new RuntimeException("Wrong type: " + parameterTypes[0]); |
| } |
| } |
| } |