<?php

class WebException extends Exception
{
    private $excname;

    /**
     * @param string $name
     * @param string $reason
     * @param int $code
     */
    function __construct($name, $reason, $code)
    {
        $this->excname = $name;
        parent::__construct($reason, $code);
    }

    public function getName()
    {
        return $this->excname;
    }
}

class SqlException extends Exception
{
    private $query;

    public function __construct($message = "Sql Error", $query = "")
    {
        $this->query = $query;
        parent::__construct($message, 0);
    }

    public function getSqlError()
    {
        return $this->getMessage().' while executing: '.$this->query;
    }
}

class BookNotFoundException extends WebException {
    public function __construct($code) {
        parent::__construct('BookNotFound', "The book with code $code was not found", -404);
    }
}

/**
 * Exception raised when an invalid attribute name is accessed
 */
class InvalidAttributeException extends Exception { }