LanguageDriver.java

/*
 * Copyright 2012-2013 MyBatis.org.
 *
 * 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.scripting;

import org.apache.ibatis.executor.parameter.ParameterHandler;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.SqlSource;
import org.apache.ibatis.parsing.XNode;
import org.apache.ibatis.scripting.defaults.DefaultParameterHandler;
import org.apache.ibatis.session.Configuration;

/**
 * 脚本语言驱动
 *
 */
public interface LanguageDriver {

  /**
   * Creates a {@link ParameterHandler} that passes the actual parameters to the the JDBC statement.
   * 
   * @author Frank D. Martinez [mnesarco]
   * @see DefaultParameterHandler
   * @param mappedStatement The mapped statement that is being executed
   * @param parameterObject The input parameter object (can be null) 
   * @param boundSql The resulting SQL once the dynamic language has been executed.
   * @return
   */
  //创建参数处理器
  ParameterHandler createParameterHandler(MappedStatement mappedStatement, Object parameterObject, BoundSql boundSql);

  /**
   * Creates an {@link SqlSource} that will hold the statement read from a mapper xml file. 
   * It is called during startup, when the mapped statement is read from a class or an xml file.
   * 
   * @param configuration The MyBatis configuration
   * @param script XNode parsed from a XML file
   * @param parameterType input parameter type got from a mapper method or specified in the parameterType xml attribute. Can be null.
   * @return
   */
  //创建SQL源码(mapper xml方式)
  SqlSource createSqlSource(Configuration configuration, XNode script, Class<?> parameterType);

  /**
   * Creates an {@link SqlSource} that will hold the statement read from an annotation.
   * It is called during startup, when the mapped statement is read from a class or an xml file.
   * 
   * @param configuration The MyBatis configuration
   * @param script The content of the annotation
   * @param parameterType input parameter type got from a mapper method or specified in the parameterType xml attribute. Can be null.
   * @return 
   */
  //创建SQL源码(注解方式)
  SqlSource createSqlSource(Configuration configuration, String script, Class<?> parameterType);

}