/**
* Copyright 2009-2015 the original author or authors.
* <p>
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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 com.baomidou.mybatisplus;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.apache.ibatis.binding.BindingException;
import org.apache.ibatis.binding.MapperProxyFactory;
import org.apache.ibatis.binding.MapperRegistry;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSession;
import com.baomidou.mybatisplus.entity.GlobalConfiguration;
/**
* <p>
* 继承至MapperRegistry
* </p>
*
* @author Caratacus hubin
* @since 2017-04-19
*/
public class MybatisMapperRegistry extends MapperRegistry {
private final Map<Class<?>, MapperProxyFactory<?>> knownMappers = new HashMap<>();
private final Configuration config;
public MybatisMapperRegistry(Configuration config) {
super(config);
this.config = config;
// TODO注入SqlRunner
GlobalConfiguration.getSqlInjector(config).injectSqlRunner(config);
}
@SuppressWarnings("unchecked")
public <T> T getMapper(Class<T> type, SqlSession sqlSession) {
final MapperProxyFactory<T> mapperProxyFactory = (MapperProxyFactory<T>) knownMappers.get(type);
if (mapperProxyFactory == null) {
throw new BindingException("Type " + type + " is not known to the MybatisPlusMapperRegistry.");
}
try {
return mapperProxyFactory.newInstance(sqlSession);
} catch (Exception e) {
throw new BindingException("Error getting mapper instance. Cause: " + e, e);
}
}
public <T> boolean hasMapper(Class<T> type) {
return knownMappers.containsKey(type);
}
@Override
public <T> void addMapper(Class<T> type) {
if (type.isInterface()) {
if (hasMapper(type)) {
// TODO 如果之前注入 直接返回
return;
// throw new BindingException("Type " + type +
// " is already known to the MybatisPlusMapperRegistry.");
}
boolean loadCompleted = false;
try {
knownMappers.put(type, new MapperProxyFactory<>(type));
// It's important that the type is added before the parser is
// run
// otherwise the binding may automatically be attempted by the
// mapper parser. If the type is already known, it won't try.
// TODO 自定义无 XML 注入
MybatisMapperAnnotationBuilder parser = new MybatisMapperAnnotationBuilder(config, type);
parser.parse();
loadCompleted = true;
} finally {
if (!loadCompleted) {
knownMappers.remove(type);
}
}
}
}
/**
* @since 3.2.2
*/
public Collection<Class<?>> getMappers() {
return Collections.unmodifiableCollection(knownMappers.keySet());
}
}