/*
* Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Nam Nguyen
*/
package com.caucho.quercus.lib.db;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import com.caucho.quercus.QuercusException;
/**
* Extra Mysql metadata.
* XXX: implement more methods
*/
public class MysqlResultSetMetaData
{
private ResultSetMetaData _resultSetMetaData;
private String []_columnEncodings;
protected MysqlResultSetMetaData(ResultSetMetaData metaData)
{
_resultSetMetaData = metaData;
try {
_columnEncodings = new String[metaData.getColumnCount()];
} catch (SQLException e) {
throw new QuercusException(e);
}
}
public String getColumnCharacterEncoding(int column)
{
String encoding = _columnEncodings[column - 1];
if (encoding == null) {
encoding = getColumnCharacterEncodingImpl(column);
_columnEncodings[column - 1] = encoding;
}
return encoding;
}
private String getColumnCharacterEncodingImpl(int column)
{
Class<?> cls = _resultSetMetaData.getClass();
try {
Method method = cls.getMethod("getColumnCharacterEncoding", int.class);
Object result = method.invoke(_resultSetMetaData, column);
return (String) result;
} catch (NoSuchMethodException e) {
throw new QuercusException(e);
} catch (InvocationTargetException e) {
throw new QuercusException(e);
} catch (IllegalAccessException e) {
throw new QuercusException(e);
}
}
}