| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.lucene.util; |
| |
| public class TestVirtualMethod extends LuceneTestCase { |
| |
| private static final VirtualMethod<TestVirtualMethod> publicTestMethod = |
| new VirtualMethod<>(TestVirtualMethod.class, "publicTest", String.class); |
| private static final VirtualMethod<TestVirtualMethod> protectedTestMethod = |
| new VirtualMethod<>(TestVirtualMethod.class, "protectedTest", int.class); |
| |
| public void publicTest(String test) {} |
| protected void protectedTest(int test) {} |
| |
| static class TestClass1 extends TestVirtualMethod { |
| @Override |
| public void publicTest(String test) {} |
| @Override |
| protected void protectedTest(int test) {} |
| } |
| |
| static class TestClass2 extends TestClass1 { |
| @Override // make it public here |
| public void protectedTest(int test) {} |
| } |
| |
| static class TestClass3 extends TestClass2 { |
| @Override |
| public void publicTest(String test) {} |
| } |
| |
| static class TestClass4 extends TestVirtualMethod { |
| } |
| |
| static class TestClass5 extends TestClass4 { |
| } |
| |
| public void testGeneral() { |
| assertEquals(0, publicTestMethod.getImplementationDistance(this.getClass())); |
| assertEquals(1, publicTestMethod.getImplementationDistance(TestClass1.class)); |
| assertEquals(1, publicTestMethod.getImplementationDistance(TestClass2.class)); |
| assertEquals(3, publicTestMethod.getImplementationDistance(TestClass3.class)); |
| assertFalse(publicTestMethod.isOverriddenAsOf(TestClass4.class)); |
| assertFalse(publicTestMethod.isOverriddenAsOf(TestClass5.class)); |
| |
| assertEquals(0, protectedTestMethod.getImplementationDistance(this.getClass())); |
| assertEquals(1, protectedTestMethod.getImplementationDistance(TestClass1.class)); |
| assertEquals(2, protectedTestMethod.getImplementationDistance(TestClass2.class)); |
| assertEquals(2, protectedTestMethod.getImplementationDistance(TestClass3.class)); |
| assertFalse(protectedTestMethod.isOverriddenAsOf(TestClass4.class)); |
| assertFalse(protectedTestMethod.isOverriddenAsOf(TestClass5.class)); |
| |
| assertTrue(VirtualMethod.compareImplementationDistance(TestClass3.class, publicTestMethod, protectedTestMethod) > 0); |
| assertEquals(0, VirtualMethod.compareImplementationDistance(TestClass5.class, publicTestMethod, protectedTestMethod)); |
| } |
| |
| @SuppressWarnings({"rawtypes","unchecked"}) |
| public void testExceptions() { |
| // LuceneTestCase is not a subclass and can never override publicTest(String) |
| expectThrows(IllegalArgumentException.class, () -> { |
| // cast to Class to remove generics: |
| publicTestMethod.getImplementationDistance((Class) LuceneTestCase.class); |
| }); |
| |
| // Method bogus() does not exist, so IAE should be thrown |
| expectThrows(IllegalArgumentException.class, () -> { |
| new VirtualMethod<>(TestVirtualMethod.class, "bogus"); |
| }); |
| |
| // Method publicTest(String) is not declared in TestClass2, so IAE should be thrown |
| expectThrows(IllegalArgumentException.class, () -> { |
| new VirtualMethod<>(TestClass2.class, "publicTest", String.class); |
| }); |
| |
| // try to create a second instance of the same baseClass / method combination |
| expectThrows(UnsupportedOperationException.class, () -> { |
| new VirtualMethod<>(TestVirtualMethod.class, "publicTest", String.class); |
| }); |
| } |
| |
| } |