io.shardingjdbc.core.parsing.SQLParsingEngine Maven / Gradle / Ivy
/*
* Copyright 1999-2015 dangdang.com.
*
* 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 io.shardingjdbc.core.parsing;
import io.shardingjdbc.core.rule.ShardingRule;
import io.shardingjdbc.core.constant.DatabaseType;
import io.shardingjdbc.core.parsing.lexer.LexerEngine;
import io.shardingjdbc.core.parsing.lexer.LexerEngineFactory;
import io.shardingjdbc.core.parsing.parser.sql.SQLStatement;
import io.shardingjdbc.core.parsing.parser.sql.SQLParserFactory;
import lombok.RequiredArgsConstructor;
/**
* SQL parsing engine.
*
* @author zhangliang
*/
@RequiredArgsConstructor
public final class SQLParsingEngine {
private final DatabaseType dbType;
private final String sql;
private final ShardingRule shardingRule;
/**
* Parse SQL.
*
* @return parsed SQL statement
*/
public SQLStatement parse() {
LexerEngine lexerEngine = LexerEngineFactory.newInstance(dbType, sql);
lexerEngine.nextToken();
return SQLParserFactory.newInstance(dbType, lexerEngine.getCurrentToken().getType(), shardingRule, lexerEngine).parse();
}
}