com.hangum.tadpole.engine.sql.parser.BasicTDBSQLParser.java Source code

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Here is the source code for com.hangum.tadpole.engine.sql.parser.BasicTDBSQLParser.java

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/*******************************************************************************
 * Copyright (c) 2015 hangum.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser Public License v2.1
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * 
 * Contributors:
 *     hangum - initial API and implementation
 ******************************************************************************/
package com.hangum.tadpole.engine.sql.parser;

import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;

import com.hangum.tadpole.commons.libs.core.define.PublicTadpoleDefine.QUERY_DML_TYPE;
import com.hangum.tadpole.commons.libs.core.define.PublicTadpoleDefine.SQL_TYPE;
import com.hangum.tadpole.engine.sql.parser.ddl.ParserDDL;
import com.hangum.tadpole.engine.sql.parser.define.ParserDefine;
import com.hangum.tadpole.engine.sql.parser.dto.QueryInfoDTO;
import com.hangum.tadpole.engine.sql.util.SQLUtil;

import net.sf.jsqlparser.parser.CCJSqlParserUtil;
import net.sf.jsqlparser.statement.Statement;
import net.sf.jsqlparser.statement.delete.Delete;
import net.sf.jsqlparser.statement.insert.Insert;
import net.sf.jsqlparser.statement.select.Select;
import net.sf.jsqlparser.statement.update.Update;

/**
 * 
 * @author hangum
 *
 */
public class BasicTDBSQLParser implements TDBSQLParser {
    private static final Logger logger = Logger.getLogger(BasicTDBSQLParser.class);

    /** base statement pattern */
    protected static final String REGEXP_STATEMENT = "^SELECT.*|^EXPLAIN.*|^SHOW.*|^DESCRIBE.*|^DESC.*|^CHECK.*|^PRAGMA.*|^WITH.*|^OPTIMIZE.*";

    private static final String MSSQL_PATTERN_STATEMENT = "|^SP_HELP.*|^EXEC.*";
    private static final String ORACLE_PATTERN_STATEMENT = "";
    private static final String MYSQL_PATTERN_STATEMENT = "|^CALL.*|^SET.*";
    private static final String PGSQL_PATTERN_STATEMENT = "";
    private static final String SQLITE_PATTERN_STATEMENT = "";
    private static final String CUBRID_PATTERN_STATEMENT = "";

    @Override
    public QueryInfoDTO parser(String sql) {
        String strCheckSQL = SQLUtil.removeComment(sql);
        strCheckSQL = StringUtils.trimToEmpty(strCheckSQL);
        QueryInfoDTO queryInfoDTO = new QueryInfoDTO();

        // if isStatement
        Pattern PATTERN_DML_BASIC = Pattern.compile(
                REGEXP_STATEMENT + MSSQL_PATTERN_STATEMENT + ORACLE_PATTERN_STATEMENT + MYSQL_PATTERN_STATEMENT
                        + PGSQL_PATTERN_STATEMENT + SQLITE_PATTERN_STATEMENT + CUBRID_PATTERN_STATEMENT,
                ParserDefine.PATTERN_FLAG);

        if (PATTERN_DML_BASIC.matcher(strCheckSQL).matches()) {
            queryInfoDTO.setStatement(true);
            queryInfoDTO.setSqlType(SQL_TYPE.DML);

            parseDML(sql, queryInfoDTO);
        } else {
            queryInfoDTO.setStatement(false);
            queryInfoDTO.setSqlType(SQL_TYPE.DDL);

            parseDDL(sql, queryInfoDTO);
        }

        return queryInfoDTO;
    }

    /**
     * parse DDL
     * 
     * @param sql
     * @param queryInfoDTO
     */
    protected void parseDDL(String sql, QueryInfoDTO queryInfoDTO) {
        ParserDDL parseDDL = new ParserDDL();
        parseDDL.parseQuery(sql, queryInfoDTO);
    }

    /**
     * parse dml
     * 
     * @param sql
     * @return
     */
    protected void parseDML(String sql, QueryInfoDTO queryInfoDTO) {
        QUERY_DML_TYPE queryType = QUERY_DML_TYPE.UNKNOWN;
        try {
            Statement statement = CCJSqlParserUtil.parse(sql);
            if (statement instanceof Select) {
                queryType = QUERY_DML_TYPE.SELECT;
            } else if (statement instanceof Insert) {
                queryType = QUERY_DML_TYPE.INSERT;
            } else if (statement instanceof Update) {
                queryType = QUERY_DML_TYPE.UPDATE;
            } else if (statement instanceof Delete) {
                queryType = QUERY_DML_TYPE.DELETE;
            }

        } catch (Throwable e) {
            logger.error(String.format("sql parse exception. [ %s ]", sql));
        }

        queryInfoDTO.setQueryType(queryType);
    }

}