/*
 * Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software;Designed and Developed mainly by many Chinese 
 * opensource volunteers. you can redistribute it and/or modify it under the 
 * terms of the GNU General Public License version 2 only, as published by the
 * Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Any questions about this component can be directed to it's project Web address 
 * https://code.google.com/p/opencloudb/.
 *
 */
package org.opencloudb.parser;

import java.sql.SQLSyntaxErrorException;

import com.foundationdb.sql.StandardException;
import com.foundationdb.sql.parser.QueryTreeNode;
import com.foundationdb.sql.parser.SQLParser;
import com.foundationdb.sql.parser.SQLParserFeature;

/**
 * @author mycat
 */
public final class SQLParserDelegate {
	public static final String DEFAULT_CHARSET="utf-8";
	private static final ThreadLocal<SQLParser> sqlParser = new ThreadLocal<SQLParser>() {
		protected SQLParser initialValue() {
			SQLParser parser = new SQLParser();
			parser.getFeatures().add(SQLParserFeature.DOUBLE_QUOTED_STRING);
			parser.getFeatures().add(SQLParserFeature.MYSQL_HINTS);
			parser.getFeatures().add(SQLParserFeature.MYSQL_INTERVAL);
			//fix 位操作符号解析问题 add by micmiu
			parser.getFeatures().add(SQLParserFeature.INFIX_BIT_OPERATORS);
			return parser;
		}

	};

	public static QueryTreeNode parse(String stmt, String string)
			throws SQLSyntaxErrorException {
		try {
			return sqlParser.get().parseStatement(stmt);
		} catch (StandardException e) {
			throw new SQLSyntaxErrorException(e);
		}
	}
}