/*
* Copyright 1999-2015 dangdang.com.
* <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
*
* 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.
* </p>
*/
package com.dangdang.ddframe.rdb.sharding.router;
import com.dangdang.ddframe.rdb.sharding.parser.result.router.SQLBuilder;
import lombok.EqualsAndHashCode;
import lombok.Getter;
import lombok.RequiredArgsConstructor;
import lombok.ToString;
/**
* SQL最小执行单元.
*
* @author gaohongtao
*/
@ToString
@RequiredArgsConstructor
@EqualsAndHashCode(exclude = "sqlBuilder")
public class SQLExecutionUnit {
@Getter
private final String dataSource;
private String sql;
private final SQLBuilder sqlBuilder;
public String getSql() {
if (null == sql) {
sql = sqlBuilder.toSQL();
} else {
sql = sqlBuilder.isChanged() ? sqlBuilder.toSQL() : sql;
}
return sql;
}
}