JavassistProxyTest.java

/*
 *    Copyright 2009-2025 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
 *
 *       https://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.executor.loader;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;

import javassist.util.proxy.Proxy;

import org.apache.ibatis.domain.blog.Author;
import org.apache.ibatis.executor.ExecutorException;
import org.apache.ibatis.executor.loader.javassist.JavassistProxyFactory;
import org.apache.ibatis.reflection.factory.DefaultObjectFactory;
import org.apache.ibatis.session.Configuration;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;

class JavassistProxyTest extends SerializableProxyTest {

  @BeforeAll
  static void createProxyFactory() {
    proxyFactory = new JavassistProxyFactory();
  }

  @Test
  void shouldCreateAProxyForAPartiallyLoadedBean() throws Exception {
    ResultLoaderMap loader = new ResultLoaderMap();
    loader.addLoader("id", null, null);
    Object proxy = proxyFactory.createProxy(author, loader, new Configuration(), new DefaultObjectFactory(),
        new ArrayList<>(), new ArrayList<>());
    Author author2 = (Author) deserialize(serialize((Serializable) proxy));
    assertTrue(author2 instanceof Proxy);
  }

  @Test
  void shouldFailCallingAnUnloadedProperty() {
    // yes, it must go in uppercase
    HashMap<String, ResultLoaderMap.LoadPair> unloadedProperties = new HashMap<>();
    unloadedProperties.put("ID", null);
    Author author2 = (Author) ((JavassistProxyFactory) proxyFactory).createDeserializationProxy(author,
        unloadedProperties, new DefaultObjectFactory(), new ArrayList<>(), new ArrayList<>());
    Assertions.assertThrows(ExecutorException.class, author2::getId);
  }

  @Test
  void shouldLetCallALoadedProperty() {
    Author author2 = (Author) ((JavassistProxyFactory) proxyFactory).createDeserializationProxy(author, new HashMap<>(),
        new DefaultObjectFactory(), new ArrayList<>(), new ArrayList<>());
    assertEquals(999, author2.getId());
  }

  @Test
  void shouldSerializeADeserializedProxy() throws Exception {
    Object proxy = ((JavassistProxyFactory) proxyFactory).createDeserializationProxy(author, new HashMap<>(),
        new DefaultObjectFactory(), new ArrayList<>(), new ArrayList<>());
    Author author2 = (Author) deserialize(serialize((Serializable) proxy));
    assertEquals(author, author2);
    assertNotEquals(author.getClass(), author2.getClass());
  }

}