minecraft-kajetans-mod/src/main/java/me/km/playerbank/PlayerBank.java

package me.km.playerbank;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.UUID;
import me.km.KajetansMod;
import me.km.databank.IStatement;

public class PlayerBank
{  
    public PlayerBank() 
    {
        KajetansMod.databank.execute("CREATE TABLE IF NOT EXISTS players ("
                + "id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, "
                + "uuid_1 BIGINT NOT NULL, "
                + "uuid_2 BIGINT NOT NULL, "
                + "name VARCHAR(20) NOT NULL, "
                + "UNIQUE INDEX (uuid_1, uuid_2));");
    }
    
    private final IStatement add = KajetansMod.databank.createStatement(
            "INSERT INTO players (uuid_1,uuid_2,name) VALUES (?,?,?);");
    
    public boolean add(UUID uuid, String name)
    {
        try
        {
            add.validate();
            add.setLong(1, uuid.getLeastSignificantBits());
            add.setLong(2, uuid.getMostSignificantBits());
            add.setString(3, name);
            add.executeUpdate();
            return true;
        }
        catch(SQLException ex)
        {
            ex.printStackTrace();
            return false;
        }
    }
    
    private final IStatement changeName = KajetansMod.databank.createStatement(
            "UPDATE players SET name=? WHERE uuid_1=? AND uuid_2=?;");
    
    public void changeName(UUID uuid, String name)
    {
        try
        {
            changeName.validate();
            changeName.setString(1, name);
            changeName.setLong(2, uuid.getLeastSignificantBits());
            changeName.setLong(3, uuid.getMostSignificantBits());
            changeName.executeUpdate();
        }
        catch(SQLException ex)
        {
            ex.printStackTrace();
        }
    }
    
    private final IStatement getId = KajetansMod.databank.createStatement(
            "SELECT id FROM players WHERE uuid_1=? AND uuid_2=?;");
    
    public int getId(UUID uuid)
    {
        try
        {
            getId.validate();
            getId.setLong(1, uuid.getLeastSignificantBits());
            getId.setLong(2, uuid.getMostSignificantBits());
            try(ResultSet rs = getId.executeQuery())
            {
                if(rs.next())
                {
                    return rs.getInt(1);
                }
                return -1;
            }
            catch(SQLException ex)
            {
                ex.printStackTrace();
            }
        }
        catch(SQLException ex)
        {
            ex.printStackTrace();
        }
        return -1;
    }
    
    private final IStatement getUUIDfromID = KajetansMod.databank.createStatement(
            "SELECT uuid_1,uuid_2 FROM players WHERE id=?;");
    
    public UUID getUUIDfromID(int id)
    {
        try
        {
            getUUIDfromID.validate();
            getUUIDfromID.setInt(1, id);
            try(ResultSet rs = getUUIDfromID.executeQuery())
            {
                if(rs.next())
                {
                    return new UUID(rs.getLong(2), rs.getLong(1));
                }
            }
            catch(SQLException ex)
            {
                ex.printStackTrace();
            }
        }
        catch(SQLException ex)
        {
            ex.printStackTrace();
        }
        return null;
    }
    
    private final IStatement getNamefromID = KajetansMod.databank.createStatement(
            "SELECT name FROM players WHERE id=?;");
    
    public String getNamefromID(int id)
    {
        try
        {
            getNamefromID.validate();
            getNamefromID.setInt(1, id);
            try(ResultSet rs = getNamefromID.executeQuery())
            {
                if(rs.next())
                {
                    return rs.getString(1);
                }
            }
            catch(SQLException ex)
            {
                ex.printStackTrace();
            }
        }
        catch(SQLException ex)
        {
            ex.printStackTrace();
        }
        return "";
    }
    
    private final IStatement getUUID = KajetansMod.databank.createStatement(
            "SELECT uuid_1,uuid_2 FROM players WHERE name=?;");
    
    public UUID getUUID(String name)
    {
        try
        {
            getUUID.validate();
            getUUID.setString(1, name);
            try(ResultSet rs = getUUID.executeQuery())
            {
                if(rs.next())
                {
                    return new UUID(rs.getLong(2), rs.getLong(1));
                }
            }
            catch(Exception ex)
            {
                ex.printStackTrace();
            }
        }
        catch(SQLException ex)
        {
            ex.printStackTrace();
        }
        return null;
    }
}