package de.memtext.db;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

/**
 * @author MB
 */
public class DbUtils {

	/**
	 * 
	 */
	private DbUtils() {
	}

	/*
	 * private Vector toResultVector(ResultSet rs) throws SQLException { Vector help
	 * = new Vector(); ResultSetMetaData rsmd = rs.getMetaData(); int
	 * numberOfColumns = rsmd.getColumnCount();
	 * 
	 * Vector row = null; while (rs.next()) { row = new Vector(); for (int i = 1; i
	 * <= numberOfColumns; i++) { row.add(rs.getObject(i)); } help.add(row); }
	 * rs.close(); return help;
	 * 
	 * }
	 */
	public static List toResultList(ResultSet rs) throws SQLException {
		List help = new LinkedList();
		ResultSetMetaData rsmd = rs.getMetaData();
		int numberOfColumns = rsmd.getColumnCount();

		List row = null;
		while (rs.next()) {
			row = new LinkedList();
			for (int i = 1; i <= numberOfColumns; i++) {
				row.add(rs.getObject(i));
			}
			help.add(row);
		}
		rs.close();
		return help;
	}

	public static void grantRightToAllTables() {
		String url = "jdbc:hsqldb:hsql://localhost:9999";
		String user = "";
		String right = "select";
		try {
			Class.forName("org.hsqldb.jdbcDriver");
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}

		try {
			DBAccess.addConnection("dbConn", DriverManager.getConnection(url, "admin", "hatschi3000"));
		} catch (SQLException e1) {
			e1.printStackTrace();
		} catch (Exception e1) {
			e1.printStackTrace();
		}
		List tablist = DBAccess.get("dbConn").getTableList();
		StringBuffer buf = new StringBuffer();
		for (Iterator it = tablist.iterator(); it.hasNext();) {
			String tabname = (String) it.next();
			buf.append("grant " + right + " on " + tabname + " to " + user + ";");

		}
		DBAccess.get("dbConn").execute(buf.toString());

		DBAccess.closeConnection("dbConn");

	}

	/**
	 * Places Object in inverted single commas if it isn't null
	 * 
	 * @param val
	 * @return either "null" if val is null or "'val'"
	 */
	public static String placeInInvertedCommas(Object val) {
		if (val == null)
			return "null";
		return "'" + val + "'";
	}

	
	public static int getInt(Statement stm, String query) throws SQLException {
		int result = -1;
		ResultSet rs = stm.executeQuery(query); 
		while (rs.next()) {
			result = rs.getInt(1);
		}
		rs.close();

		return result;
	}
	
	public static String getString(Statement stm, String query) throws SQLException {
		String result = null;
		ResultSet rs = stm.executeQuery(query); 
		while (rs.next()) {
			result = rs.getString(1);
		}
		rs.close();

		return result;
	}
	/**
	 * 
		 * @param query
	 * @return -1 wenn nichts gefunden
	 * @throws SQLException
	 */
	public static int getInt(Connection con, String query,int param) throws SQLException {
		int result = -1;
		PreparedStatement pst=con.prepareStatement(query);
		pst.setInt(1, param);
		ResultSet rs = pst.executeQuery(); 
		while (rs.next()) {
			result = rs.getInt(1);
		}
		rs.close();
		pst.close();
		return result;
	}
	
	/**
	 * 
		 * @param query
	 * @return -1 wenn nichts gefunden
	 * @throws SQLException
	 */
	public static int getInt(Connection con, String query,String param) throws SQLException {
		int result = -1;
		PreparedStatement pst=con.prepareStatement(query);
		pst.setString(1, param);
		ResultSet rs = pst.executeQuery(); 
		while (rs.next()) {
			result = rs.getInt(1);
		}
		rs.close();
		pst.close();
		return result;
	}
	/**
	 * 
	 * @param con
	 * @param query
	 * @param param
	 * @return null if nothing found
	 * @throws SQLException 
	 */
	public static String getString(Connection con,String query,String param) throws SQLException
	{
		String result=null;
		PreparedStatement pst=con.prepareStatement(query);
		pst.setString(1, param);
		ResultSet rs = pst.executeQuery(); 
		while (rs.next()) {
			result = rs.getString(1);
		}
		rs.close();
		pst.close();
		return result;
		
	}
}
//Created on 21.06.2003