ErrorLocator.java

package com.github.walker.easydb.exception;

import com.github.walker.easydb.assistant.LogFactory;
import org.apache.log4j.Logger;

import java.util.HashMap;

/**
 * <p>
 * Locator of database error, it translates the error code of different database
 * into unified error type.
 * </p>
 *
 * @author HuQingmiao
 */
public abstract class ErrorLocator {

    protected static Logger log = LogFactory.getLogger(ErrorLocator.class);

    private static HashMap<String, ErrorLocator> insMap = new HashMap<String, ErrorLocator>(3);


    public synchronized static ErrorLocator getInstance(String dbType) {

        if (!insMap.containsKey(dbType)) {

            if ("oracle".equalsIgnoreCase(dbType)) {
                insMap.put(dbType, new OracleErrorLocator());

            } else if ("mysql".equalsIgnoreCase(dbType)) {
                insMap.put(dbType, new MysqlErrorLocator());

            } else if ("db2".equalsIgnoreCase(dbType)) {
                insMap.put(dbType, new DB2ErrorLocator());

            } else if ("sqlserver".equalsIgnoreCase(dbType)) {
                insMap.put(dbType, new SqlserverErrorLocator());
            }


        }
        return insMap.get(dbType);
    }


    abstract public String getErrorMsg(int errorCode);

}