| /* |
| * 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.wayang.core.util; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import java.lang.reflect.Type; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Test suite for {@link ReflectionUtils}. |
| */ |
| public class ReflectionUtilsTest { |
| |
| @SuppressWarnings("unused") |
| public static int TEST_INT = 42; |
| |
| @SuppressWarnings("unused") |
| public static int testInt() { |
| return 23; |
| } |
| |
| @Test |
| public void testEvaluateWithInstantiation() { |
| final Object val = ReflectionUtils.evaluate("new java.lang.String()"); |
| Assert.assertEquals("", val); |
| } |
| |
| @Test |
| public void testEvaluateWithStaticVariable() { |
| final Object val = ReflectionUtils.evaluate("org.apache.wayang.core.util.ReflectionUtilsTest.TEST_INT"); |
| Assert.assertEquals(42, val); |
| } |
| |
| @Test |
| public void testEvaluateWithStaticMethod() { |
| final Object val = ReflectionUtils.evaluate("org.apache.wayang.core.util.ReflectionUtilsTest.testInt()"); |
| Assert.assertEquals(23, val); |
| } |
| |
| public interface MyParameterizedInterface<A> { } |
| |
| public static class MyParameterizedClassA<A, B> { |
| } |
| |
| public static class MyParameterizedClassB<C, D> extends MyParameterizedClassA<C, D> { |
| } |
| |
| public static class MyParameterizedClassC implements MyParameterizedInterface<Long> { } |
| |
| |
| @Test |
| public void testGetTypeParametersWithReusedTypeParameters() { |
| MyParameterizedClassA<Integer, String> myParameterizedObject = new MyParameterizedClassB<Integer, String>() { |
| }; |
| Map<String, Type> expectedTypeParameters = new HashMap<>(); |
| expectedTypeParameters.put("A", Integer.class); |
| expectedTypeParameters.put("B", String.class); |
| |
| final Map<String, Type> typeParameters = ReflectionUtils.getTypeParameters( |
| myParameterizedObject.getClass(), |
| MyParameterizedClassA.class |
| ); |
| |
| Assert.assertEquals(expectedTypeParameters, typeParameters); |
| } |
| |
| @Test |
| public void testGetTypeParametersWithIndirectTypeParameters() { |
| MyParameterizedClassC myParameterizedObject = new MyParameterizedClassC() { |
| }; |
| Map<String, Type> expectedTypeParameters = new HashMap<>(); |
| expectedTypeParameters.put("A", Long.class); |
| |
| final Map<String, Type> typeParameters = ReflectionUtils.getTypeParameters( |
| myParameterizedObject.getClass(), |
| MyParameterizedInterface.class |
| ); |
| |
| Assert.assertEquals(expectedTypeParameters, typeParameters); |
| } |
| |
| } |