package de.memtext.db;

import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Iterator;
import java.util.List;

import de.memtext.util.StringUtils;

public class DBComparison {

    private DBComparison() {
        super();
    }

    public static void main(String a[]) {
        try {
            Class.forName("org.hsqldb.jdbcDriver");

            java.sql.Connection con = DriverManager.getConnection("jdbc:hsqldb:hsql://localhost:9000", "sa", "");
            DBAccess.addConnection("ssc", con);
            java.sql.Connection con2 = DriverManager.getConnection("jdbc:hsqldb:hsql://localhost:9500", "sa", "");
            DBAccess.addConnection("ssc-test", con2);
            compare("ssc", "ssc-test");

        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    private static void compare(String db1, String db2) throws SQLException {
        System.out.println("Start comparing...");
        StringBuffer fineTables = new StringBuffer("The following tables are fine: ");
        List tableList = DBAccess.get(db1).getTableList();
        boolean isOk = false;
        for (Iterator it = tableList.iterator(); it.hasNext();) {
            String table = (String) it.next();

            if (DBAccess.get(db2).hasTable(table)) {
                isOk = true;
                if (DBAccess.get(db1).getColumnCount(table) != DBAccess.get(db2).getColumnCount(table)) {
                    System.out.println("Table " + table + " has a different number of columns");
                    isOk = false;
                } else {
                    List colList = DBAccess.get(db1).getColumnNames(table);
                    for (Iterator it2 = colList.iterator(); it2.hasNext();) {
                        String colname = (String) it2.next();
                        if (!DBAccess.get(db2).hasColumn(table, colname)) {
                            System.out.println("Table " + table + " in " + db2 + " doesn't have column:" + colname);
                            isOk = false;
                        } else {

                            if (DBAccess.get(db1).getColumnType(table, colname) != DBAccess.get(db2).getColumnType(table, colname)) {
                                System.out.println("Table " + table + " column:" + colname + " are of different types");
                                isOk = false;
                            }

                        }
                    }
                    if (isOk) fineTables.append(table + ",");
                }

            } else {
                System.out.println(db2 + " doesn't contain table:" + table);
            }
        }
        StringUtils.deleteLastChar(fineTables);
        System.out.println(fineTables);
        System.out.println("..done");
    }
}

//Created on 11.02.2004 at 13:19:36