/*
 * 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.parsing.parser.dialect.sqlserver;

import com.dangdang.ddframe.rdb.sharding.api.rule.ShardingRule;
import com.dangdang.ddframe.rdb.sharding.parsing.lexer.LexerEngine;
import com.dangdang.ddframe.rdb.sharding.parsing.lexer.token.DefaultKeyword;
import com.dangdang.ddframe.rdb.sharding.parsing.parser.dialect.mysql.MySQLOrderBySQLParser;
import com.dangdang.ddframe.rdb.sharding.parsing.parser.sql.AbstractOrderBySQLParser;
import com.dangdang.ddframe.rdb.sharding.parsing.parser.sql.DistinctSQLParser;
import com.dangdang.ddframe.rdb.sharding.parsing.parser.sql.GroupBySQLParser;
import com.dangdang.ddframe.rdb.sharding.parsing.parser.sql.HavingSQLParser;
import com.dangdang.ddframe.rdb.sharding.parsing.parser.sql.SelectListSQLParser;
import com.dangdang.ddframe.rdb.sharding.parsing.parser.statement.dql.select.AbstractSelectParser;
import com.dangdang.ddframe.rdb.sharding.parsing.parser.statement.dql.select.SelectStatement;

/**
 * SQLServer Select语句解析器.
 *
 * @author zhangliang
 */
public final class SQLServerSelectParser extends AbstractSelectParser {
    
    private final DistinctSQLParser distinctSQLParser;
    
    private final SQLServerTopParser sqlServerTopParser;
    
    private final SelectListSQLParser selectListSQLParser;
    
    private final GroupBySQLParser groupBySQLParser;
    
    private final HavingSQLParser havingSQLParser;
    
    private final AbstractOrderBySQLParser orderBySQLParser;
    
    private final SQLServerOffsetParser offsetParser;
    
    private final SQLServerForParser forParser;
    
    public SQLServerSelectParser(final ShardingRule shardingRule, final LexerEngine lexerEngine) {
        super(shardingRule, lexerEngine, new SQLServerWhereSQLParser(lexerEngine));
        distinctSQLParser = new DistinctSQLParser(lexerEngine);
        sqlServerTopParser = new SQLServerTopParser(lexerEngine);
        selectListSQLParser = new SQLServerSelectListSQLParser(shardingRule, lexerEngine);
        groupBySQLParser = new GroupBySQLParser(lexerEngine);
        havingSQLParser = new HavingSQLParser(lexerEngine);
        orderBySQLParser = new MySQLOrderBySQLParser(lexerEngine);
        offsetParser = new SQLServerOffsetParser(lexerEngine);
        forParser = new SQLServerForParser(lexerEngine);
    }
    
    @Override
    protected void parseInternal(final SelectStatement selectStatement) {
        distinctSQLParser.parse();
        sqlServerTopParser.parse(selectStatement);
        selectListSQLParser.parse(selectStatement, getItems());
        parseFrom(selectStatement);
        parseWhere(selectStatement);
        groupBySQLParser.parse(selectStatement);
        havingSQLParser.parse();
        orderBySQLParser.parse(selectStatement);
        offsetParser.parse(selectStatement);
        forParser.parse();
    }
    
    @Override
    protected void parseJoinTable(final SelectStatement selectStatement) {
        if (getLexerEngine().skipIfEqual(DefaultKeyword.WITH)) {
            getLexerEngine().skipParentheses(selectStatement);
        }
        super.parseJoinTable(selectStatement);
    }
}