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/**
 * Copyright (C) 2016 - 2030 youtongluan.
 *
 * 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.yx.db.mapper;

import java.util.List;
import java.util.Map;

import org.yx.db.sql.InsertResult;
import org.yx.db.sql.RawSqlBuilder;
import org.yx.db.visit.Visitors;
import org.yx.exception.SumkException;

/**
 * 以?为占位符的原生sql。推荐通过常量或其它方式引用

 * sql的参数支持以List的方式传入
 * 
 * @author 游夏
 *
 */
public class RawExecutor {
	/**
	 * @param sql
	 *            以?为占位符的原生sql。
	 * @param params
	 *            参数
	 * @return sql执行结果
	 */
	public static int execute(String sql, Object... params) {
		try {
			return Visitors.modifyVisitor.visit(new RawSqlBuilder(sql, params));
		} catch (Exception e) {
			throw SumkException.create(e);
		}
	}

	/**
	 * 这个方法用于需要获取自增长主键的值的情况
	 * 
	 * @param sql
	 *            以?为占位符的原生sql。
	 * @param params
	 *            参数
	 * @return sql执行结果
	 */
	public static InsertResult insertWithAutoGeneratedKeys(String sql, Object... params) {
		try {
			return Visitors.insertWithAutoGeneratedKeysVisitor.visit(new RawSqlBuilder(sql, params));
		} catch (Exception e) {
			throw SumkException.create(e);
		}
	}

	/**
	 * @param sql
	 *            以?为占位符的原生sql
	 * @param params
	 *            参数
	 * @return 结果集
	 */
	public static List> list(String sql, Object... params) {
		try {
			return Visitors.queryVisitor.visit(new RawSqlBuilder(sql, params));
		} catch (Exception e) {
			throw SumkException.create(e);
		}
	}

	/**
	 * @param sql
	 *            以?为占位符的原生sql
	 * @param params
	 *            参数
	 * @return 结果集
	 */
	public static List listInOrder(String sql, Object... params) {
		try {
			return Visitors.arrayListQueryVisitor.visit(new RawSqlBuilder(sql, params));
		} catch (Exception e) {
			throw SumkException.create(e);
		}
	}

	/**
	 * 只有一个列的list方法

	 * sum等函数是特殊的singleColumnList，它返回的list的size为1
	 * 
	 * @param sql
	 *            以?为占位符的原生sql
	 * @param params
	 *            参数
	 * @return 结果集
	 */
	public static List singleColumnList(String sql, Object... params) {
		try {
			return Visitors.singleListQueryVisitor.visit(new RawSqlBuilder(sql, params));
		} catch (Exception e) {
			throw SumkException.create(e);
		}
	}

	/**
	 * @param sql
	 *            以?为占位符的原生sql
	 * @param params
	 *            参数
	 * @return 记录数
	 */
	public static int count(String sql, Object... params) {
		try {
			List list = Visitors.singleListQueryVisitor.visit(new RawSqlBuilder(sql, params));
			Number n = (Number) list.get(0);
			return n.intValue();
		} catch (Exception e) {
			throw SumkException.create(e);
		}
	}

}