/**
* Copyright 2009-2016 the original author or authors.
*
* 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 org.apache.ibatis.reflection;
import static org.junit.Assert.*;
import java.lang.reflect.Field;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.WildcardType;
import java.util.Date;
import java.util.List;
import java.util.Map;
import org.apache.ibatis.reflection.typeparam.Calculator;
import org.apache.ibatis.reflection.typeparam.Calculator.SubCalculator;
import org.apache.ibatis.reflection.typeparam.Level0Mapper;
import org.apache.ibatis.reflection.typeparam.Level0Mapper.Level0InnerMapper;
import org.apache.ibatis.reflection.typeparam.Level1Mapper;
import org.apache.ibatis.reflection.typeparam.Level2Mapper;
import org.junit.Test;
public class TypeParameterResolverTest {
@Test
public void testReturn_Lv0SimpleClass() throws Exception {
Class<?> clazz = Level0Mapper.class;
Method method = clazz.getMethod("simpleSelect");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertEquals(Double.class, result);
}
@Test
public void testReturn_SimpleVoid() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("simpleSelectVoid", Integer.class);
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertEquals(void.class, result);
}
@Test
public void testReturn_SimplePrimitive() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("simpleSelectPrimitive", int.class);
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertEquals(double.class, result);
}
@Test
public void testReturn_SimpleClass() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("simpleSelect");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertEquals(Double.class, result);
}
@Test
public void testReturn_SimpleList() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("simpleSelectList");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof ParameterizedType);
ParameterizedType paramType = (ParameterizedType) result;
assertEquals(List.class, paramType.getRawType());
assertEquals(1, paramType.getActualTypeArguments().length);
assertEquals(Double.class, paramType.getActualTypeArguments()[0]);
}
@Test
public void testReturn_SimpleMap() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("simpleSelectMap");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof ParameterizedType);
ParameterizedType paramType = (ParameterizedType) result;
assertEquals(Map.class, paramType.getRawType());
assertEquals(2, paramType.getActualTypeArguments().length);
assertEquals(Integer.class, paramType.getActualTypeArguments()[0]);
assertEquals(Double.class, paramType.getActualTypeArguments()[1]);
}
@Test
public void testReturn_SimpleWildcard() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("simpleSelectWildcard");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof ParameterizedType);
ParameterizedType paramType = (ParameterizedType) result;
assertEquals(List.class, paramType.getRawType());
assertEquals(1, paramType.getActualTypeArguments().length);
assertTrue(paramType.getActualTypeArguments()[0] instanceof WildcardType);
WildcardType wildcard = (WildcardType) paramType.getActualTypeArguments()[0];
assertEquals(String.class, wildcard.getUpperBounds()[0]);
}
@Test
public void testReturn_SimpleArray() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("simpleSelectArray");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof Class);
Class<?> resultClass = (Class<?>) result;
assertTrue(resultClass.isArray());
assertEquals(String.class, resultClass.getComponentType());
}
@Test
public void testReturn_SimpleArrayOfArray() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("simpleSelectArrayOfArray");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof Class);
Class<?> resultClass = (Class<?>) result;
assertTrue(resultClass.isArray());
assertTrue(resultClass.getComponentType().isArray());
assertEquals(String.class, resultClass.getComponentType().getComponentType());
}
@Test
public void testReturn_SimpleTypeVar() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("simpleSelectTypeVar");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertEquals(Object.class, result);
}
@Test
public void testReturn_Lv1Class() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("select", Object.class);
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertEquals(String.class, result);
}
@Test
public void testReturn_Lv2CustomClass() throws Exception {
Class<?> clazz = Level2Mapper.class;
Method method = clazz.getMethod("selectCalculator", Calculator.class);
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof ParameterizedType);
ParameterizedType paramType = (ParameterizedType) result;
assertEquals(Calculator.class, paramType.getRawType());
assertEquals(1, paramType.getActualTypeArguments().length);
assertEquals(String.class, paramType.getActualTypeArguments()[0]);
}
@Test
public void testReturn_Lv2CustomClassList() throws Exception {
Class<?> clazz = Level2Mapper.class;
Method method = clazz.getMethod("selectCalculatorList");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof ParameterizedType);
ParameterizedType paramTypeOuter = (ParameterizedType) result;
assertEquals(List.class, paramTypeOuter.getRawType());
assertEquals(1, paramTypeOuter.getActualTypeArguments().length);
ParameterizedType paramTypeInner = (ParameterizedType) paramTypeOuter.getActualTypeArguments()[0];
assertEquals(Calculator.class, paramTypeInner.getRawType());
assertEquals(Date.class, paramTypeInner.getActualTypeArguments()[0]);
}
@Test
public void testReturn_Lv0InnerClass() throws Exception {
Class<?> clazz = Level0InnerMapper.class;
Method method = clazz.getMethod("select", Object.class);
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertEquals(Float.class, result);
}
@Test
public void testReturn_Lv2Class() throws Exception {
Class<?> clazz = Level2Mapper.class;
Method method = clazz.getMethod("select", Object.class);
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertEquals(String.class, result);
}
@Test
public void testReturn_Lv1List() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("selectList", Object.class, Object.class);
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof ParameterizedType);
ParameterizedType type = (ParameterizedType) result;
assertEquals(List.class, type.getRawType());
assertEquals(1, type.getActualTypeArguments().length);
assertEquals(String.class, type.getActualTypeArguments()[0]);
}
@Test
public void testReturn_Lv1Array() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("selectArray", List[].class);
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof Class);
Class<?> resultClass = (Class<?>) result;
assertTrue(resultClass.isArray());
assertEquals(String.class, resultClass.getComponentType());
}
@Test
public void testReturn_Lv2ArrayOfArray() throws Exception {
Class<?> clazz = Level2Mapper.class;
Method method = clazz.getMethod("selectArrayOfArray");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof Class);
Class<?> resultClass = (Class<?>) result;
assertTrue(result instanceof Class);
assertTrue(resultClass.isArray());
assertTrue(resultClass.getComponentType().isArray());
assertEquals(String.class, resultClass.getComponentType().getComponentType());
}
@Test
public void testReturn_Lv2ArrayOfList() throws Exception {
Class<?> clazz = Level2Mapper.class;
Method method = clazz.getMethod("selectArrayOfList");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof GenericArrayType);
GenericArrayType genericArrayType = (GenericArrayType) result;
assertTrue(genericArrayType.getGenericComponentType() instanceof ParameterizedType);
ParameterizedType paramType = (ParameterizedType) genericArrayType.getGenericComponentType();
assertEquals(List.class, paramType.getRawType());
assertEquals(String.class, paramType.getActualTypeArguments()[0]);
}
@Test
public void testReturn_Lv2WildcardList() throws Exception {
Class<?> clazz = Level2Mapper.class;
Method method = clazz.getMethod("selectWildcardList");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof ParameterizedType);
ParameterizedType type = (ParameterizedType) result;
assertEquals(List.class, type.getRawType());
assertEquals(1, type.getActualTypeArguments().length);
assertTrue(type.getActualTypeArguments()[0] instanceof WildcardType);
WildcardType wildcard = (WildcardType) type.getActualTypeArguments()[0];
assertEquals(0, wildcard.getLowerBounds().length);
assertEquals(1, wildcard.getUpperBounds().length);
assertEquals(String.class, wildcard.getUpperBounds()[0]);
}
@Test
public void testReturn_LV2Map() throws Exception {
Class<?> clazz = Level2Mapper.class;
Method method = clazz.getMethod("selectMap");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertTrue(result instanceof ParameterizedType);
ParameterizedType paramType = (ParameterizedType) result;
assertEquals(Map.class, paramType.getRawType());
assertEquals(2, paramType.getActualTypeArguments().length);
assertEquals(String.class, paramType.getActualTypeArguments()[0]);
assertEquals(Integer.class, paramType.getActualTypeArguments()[1]);
}
@Test
public void testReturn_Subclass() throws Exception {
Class<?> clazz = SubCalculator.class;
Method method = clazz.getMethod("getId");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertEquals(String.class, result);
}
@Test
public void testParam_Primitive() throws Exception {
Class<?> clazz = Level2Mapper.class;
Method method = clazz.getMethod("simpleSelectPrimitive", int.class);
Type[] result = TypeParameterResolver.resolveParamTypes(method, clazz);
assertEquals(1, result.length);
assertEquals(int.class, result[0]);
}
@Test
public void testParam_Simple() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("simpleSelectVoid", Integer.class);
Type[] result = TypeParameterResolver.resolveParamTypes(method, clazz);
assertEquals(1, result.length);
assertEquals(Integer.class, result[0]);
}
@Test
public void testParam_Lv1Single() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("select", Object.class);
Type[] result = TypeParameterResolver.resolveParamTypes(method, clazz);
assertEquals(1, result.length);
assertEquals(String.class, result[0]);
}
@Test
public void testParam_Lv2Single() throws Exception {
Class<?> clazz = Level2Mapper.class;
Method method = clazz.getMethod("select", Object.class);
Type[] result = TypeParameterResolver.resolveParamTypes(method, clazz);
assertEquals(1, result.length);
assertEquals(String.class, result[0]);
}
@Test
public void testParam_Lv2Multiple() throws Exception {
Class<?> clazz = Level2Mapper.class;
Method method = clazz.getMethod("selectList", Object.class, Object.class);
Type[] result = TypeParameterResolver.resolveParamTypes(method, clazz);
assertEquals(2, result.length);
assertEquals(Integer.class, result[0]);
assertEquals(String.class, result[1]);
}
@Test
public void testParam_Lv2CustomClass() throws Exception {
Class<?> clazz = Level2Mapper.class;
Method method = clazz.getMethod("selectCalculator", Calculator.class);
Type[] result = TypeParameterResolver.resolveParamTypes(method, clazz);
assertEquals(1, result.length);
assertTrue(result[0] instanceof ParameterizedType);
ParameterizedType paramType = (ParameterizedType) result[0];
assertEquals(Calculator.class, paramType.getRawType());
assertEquals(1, paramType.getActualTypeArguments().length);
assertEquals(String.class, paramType.getActualTypeArguments()[0]);
}
@Test
public void testParam_Lv1Array() throws Exception {
Class<?> clazz = Level1Mapper.class;
Method method = clazz.getMethod("selectArray", List[].class);
Type[] result = TypeParameterResolver.resolveParamTypes(method, clazz);
assertTrue(result[0] instanceof GenericArrayType);
GenericArrayType genericArrayType = (GenericArrayType) result[0];
assertTrue(genericArrayType.getGenericComponentType() instanceof ParameterizedType);
ParameterizedType paramType = (ParameterizedType) genericArrayType.getGenericComponentType();
assertEquals(List.class, paramType.getRawType());
assertEquals(String.class, paramType.getActualTypeArguments()[0]);
}
@Test
public void testParam_Subclass() throws Exception {
Class<?> clazz = SubCalculator.class;
Method method = clazz.getMethod("setId", Object.class);
Type[] result = TypeParameterResolver.resolveParamTypes(method, clazz);
assertEquals(String.class, result[0]);
}
@Test
public void testReturn_Anonymous() throws Exception {
Calculator<?> instance = new Calculator<Integer>();
Class<?> clazz = instance.getClass();
Method method = clazz.getMethod("getId");
Type result = TypeParameterResolver.resolveReturnType(method, clazz);
assertEquals(Object.class, result);
}
@Test
public void testField_GenericField() throws Exception {
Class<?> clazz = SubCalculator.class;
Class<?> declaredClass = Calculator.class;
Field field = declaredClass.getDeclaredField("fld");
Type result = TypeParameterResolver.resolveFieldType(field, clazz);
assertEquals(String.class, result);
}
@Test
public void testReturnParam_WildcardWithUpperBounds() throws Exception {
class Key {}
@SuppressWarnings("unused")
class KeyBean<S extends Key & Cloneable, T extends Key> {
private S key1;
private T key2;
public S getKey1() {
return key1;
}
public void setKey1(S key1) {
this.key1 = key1;
}
public T getKey2() {
return key2;
}
public void setKey2(T key2) {
this.key2 = key2;
}
}
Class<?> clazz = KeyBean.class;
Method getter1 = clazz.getMethod("getKey1");
assertEquals(Key.class, TypeParameterResolver.resolveReturnType(getter1, clazz));
Method setter1 = clazz.getMethod("setKey1", Key.class);
assertEquals(Key.class, TypeParameterResolver.resolveParamTypes(setter1, clazz)[0]);
Method getter2 = clazz.getMethod("getKey2");
assertEquals(Key.class, TypeParameterResolver.resolveReturnType(getter2, clazz));
Method setter2 = clazz.getMethod("setKey2", Key.class);
assertEquals(Key.class, TypeParameterResolver.resolveParamTypes(setter2, clazz)[0]);
}
}