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package com.att.research.mdbc.mixins;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigDecimal;
import java.nio.ByteBuffer;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.sql.Types;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Properties;
import org.json.JSONObject;
import com.att.research.logging.EELFLoggerDelegate;
import com.att.research.mdbc.TableInfo;
import com.datastax.driver.core.utils.Bytes;
/**
* Utility functions used by several of the mixins should go here.
*
* @author Robert P. Eby
*/
public class Utils {
private static EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(Utils.class);
/**
* Transforms and JsonObject into an array of objects
* @param ti information related to the table
* @param tbl table that jo belong to
* @param jo object that represents a row in the table
* @param musicDefaultPrimaryKeyName contains the name of key associated with the default primary key used by MUSIC, it can be null, if not requird
* @return array with the objects in the row
*/
public static Object[] jsonToRow(TableInfo ti, String tbl, JSONObject jo, String musicDefaultPrimaryKeyName) {
int columnSize = ti.columns.size();
ArrayList<Object> rv = new ArrayList<Object>();
if (musicDefaultPrimaryKeyName!=null && jo.has(musicDefaultPrimaryKeyName)) {
rv.add(jo.getString(musicDefaultPrimaryKeyName));
}
for (int i = 0; i < columnSize; i++) {
String colname = ti.columns.get(i);
switch (ti.coltype.get(i)) {
case Types.BIGINT:
rv.add(jo.optLong(colname, 0));
break;
case Types.BOOLEAN:
rv.add(jo.optBoolean(colname, false));
break;
case Types.BLOB:
rv.add(jo.optString(colname, ""));
break;
case Types.DECIMAL:
rv.add(jo.optBigDecimal(colname, BigDecimal.ZERO));
break;
case Types.DOUBLE:
rv.add(jo.optDouble(colname, 0));
break;
case Types.INTEGER:
rv.add(jo.optInt(colname, 0));
break;
case Types.TIMESTAMP:
//rv[i] = new Date(jo.optString(colname, ""));
rv.add(jo.optString(colname, ""));
break;
case Types.DATE:
case Types.VARCHAR:
//Fall through
default:
rv.add(jo.optString(colname, ""));
break;
}
}
return rv.toArray();
}
/**
* Return a String equivalent of an Object. Useful for writing SQL.
* @param val the object to String-ify
* @return the String value
*/
public static String getStringValue(Object val) {
if (val == null)
return "NULL";
if (val instanceof String)
return "'" + val.toString().replaceAll("'", "''") + "'"; // double any quotes
if (val instanceof Number)
return ""+val;
if (val instanceof ByteBuffer)
return "'" + Bytes.toHexString((ByteBuffer)val).substring(2) + "'"; // substring(2) is to remove the "0x" at front
if (val instanceof Date)
return "'" + (new Timestamp(((Date)val).getTime())).toString() + "'";
// Boolean, and anything else
return val.toString();
}
/**
* Parse result set and put into object array
* @param tbl
* @param rs
* @return
* @throws SQLException
*/
public static ArrayList<Object[]> parseResults(TableInfo ti, ResultSet rs) throws SQLException {
ArrayList<Object[]> results = new ArrayList<Object[]>();
while (rs.next()) {
Object[] row = new Object[ti.columns.size()];
for (int i = 0; i < ti.columns.size(); i++) {
String colname = ti.columns.get(i);
switch (ti.coltype.get(i)) {
case Types.BIGINT:
row[i] = rs.getLong(colname);
break;
case Types.BOOLEAN:
row[i] = rs.getBoolean(colname);
break;
case Types.BLOB:
System.err.println("WE DO NOT SUPPORT BLOBS IN H2!! COLUMN NAME="+colname);
//logger.error("WE DO NOT SUPPORT BLOBS IN H2!! COLUMN NAME="+colname);
// throw an exception here???
break;
case Types.DOUBLE:
row[i] = rs.getDouble(colname);
break;
case Types.INTEGER:
row[i] = rs.getInt(colname);
break;
case Types.TIMESTAMP:
//rv[i] = new Date(jo.optString(colname, ""));
row[i] = rs.getString(colname);
break;
case Types.VARCHAR:
//Fall through
default:
row[i] = rs.getString(colname);
break;
}
}
results.add(row);
}
return results;
}
@SuppressWarnings("unused")
static List<Class<?>> getClassesImplementing(Class<?> implx) {
Properties pr = null;
try {
pr = new Properties();
pr.load(Utils.class.getResourceAsStream("/mdbc_driver.properties"));
}
catch (IOException e) {
logger.error(EELFLoggerDelegate.errorLogger, "Could not load property file > " + e.getMessage());
}
List<Class<?>> list = new ArrayList<Class<?>>();
if (pr==null) {
return list;
}
String mixins = pr.getProperty("MIXINS");
for (String className: mixins.split("[ ,]")) {
try {
Class<?> cl = Class.forName(className.trim());
if (MixinFactory.impl(cl, implx)) {
list.add(cl);
}
} catch (ClassNotFoundException e) {
logger.error(EELFLoggerDelegate.errorLogger,"Mixin class "+className+" not found.");
}
}
return list;
}
public static void registerDefaultDrivers() {
Properties pr = null;
try {
pr = new Properties();
pr.load(Utils.class.getResourceAsStream("/mdbc_driver.properties"));
}
catch (IOException e) {
logger.error("Could not load property file > " + e.getMessage());
}
@SuppressWarnings("unused")
List<Class<?>> list = new ArrayList<Class<?>>();
String drivers = pr.getProperty("DEFAULT_DRIVERS");
for (String driver: drivers.split("[ ,]")) {
logger.info(EELFLoggerDelegate.applicationLogger, "Registering jdbc driver '" + driver + "'");
try {
@SuppressWarnings("unused")
Class<?> cl = Class.forName(driver.trim());
} catch (ClassNotFoundException e) {
logger.error(EELFLoggerDelegate.errorLogger,"Driver class "+driver+" not found.");
}
}
}
public static Properties getMdbcProperties() {
Properties prop = new Properties();
InputStream input = null;
try {
input = Utils.class.getClassLoader().getResourceAsStream("/mdbc.properties");
prop.load(input);
} catch (Exception e) {
logger.warn(EELFLoggerDelegate.applicationLogger, "Could load mdbc.properties."
+ "Proceeding with defaults " + e.getMessage());
} finally {
if (input != null) {
try {
input.close();
} catch (IOException e) {
logger.error(EELFLoggerDelegate.errorLogger, e.getMessage());
}
}
}
return prop;
}
}
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