com.hangum.tadpole.engine.sql.parser.ddl.ParserDDL.java Source code

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Here is the source code for com.hangum.tadpole.engine.sql.parser.ddl.ParserDDL.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.ddl;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

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

import com.hangum.tadpole.engine.sql.parser.define.ParserDefine;
import com.hangum.tadpole.engine.sql.parser.dto.QueryInfoDTO;

/**
 * DDL SQL Parser
 * 
 * @author hangum
 *
 */
public class ParserDDL {
    private static final Logger logger = Logger.getLogger(ParserDDL.class);

    /**
     * ddl parser
     * 
     * @param sql
     * @param queryInfoDTO
     * @return
     */
    public QueryInfoDTO parseQuery(String sql, QueryInfoDTO queryInfoDTO) {
        sql = StringUtils.upperCase(StringUtils.trim(sql));

        for (DefineDDL ddl : DefineDDL.values()) {
            //         if(logger.isDebugEnabled()) logger.debug(ddl.getRegExp());

            Matcher matcher = Pattern.compile(ddl.getRegExp(), ParserDefine.PATTERN_FLAG).matcher(sql);
            if (matcher.find()) {
                //            if(logger.isDebugEnabled()) logger.debug("=> finding: " + ddl.getRegExp());
                queryInfoDTO.setQueryDDLType(ddl.getDdlType());
                queryInfoDTO.setQueryStatus(ddl.getDdlStatus());
                queryInfoDTO.setObjectName(getObjectName(matcher, sql));

                break;
            }
        }

        return queryInfoDTO;
    }

    /**
     * getObjectName
     * 
     * @param matcher
     * @param sql
     * @return
     */
    private String getObjectName(Matcher matcher, String sql) {
        int intEndIndex = matcher.end(1);
        int intContentLength = matcher.group(1).length();

        if (logger.isDebugEnabled()) {
            logger.debug("===DDL Parser======================================");
            logger.debug("SQL :" + sql);
            logger.debug("object name: " + matcher.group(1));
            logger.debug("intContentLength : " + intContentLength);
            logger.debug("intEndIndex : " + intEndIndex);
            logger.debug("start index: " + (intEndIndex - intContentLength));
            logger.debug("===DDL Parser======================================");
        }

        String objctName = StringUtils.substring(sql, (intEndIndex - intContentLength), intEndIndex);
        objctName = StringUtils.remove(objctName, "\"");
        objctName = StringUtils.remove(objctName, "'");
        objctName = StringUtils.remove(objctName, "`");

        return objctName;
    }
}