<?php
/**
 * Abstract domain model
 */
abstract class App_Model_ModelAbstract
{
    /**
     * Allowed fields in this entity
     * 
     * @var array
     */
    protected $_fields = array();
    
    /**
     * List of field values
     *
     * @var array
     */
    protected $_values = array();
    
    /**
     * Create an new instance of this domain model
     *
     * @param array $values
     */
    public function __construct(array $values)
    {
        foreach ($values as $name => $value) {
            $this->$name = $value;
        }
    }
    
    /**
     * Set a field
     *
     * @param  string $name
     * @param  mixed  $value
     * @throws App_Model_OutOfBoundsException When field does not exist
     * @return void
     */
    public function __set($name, $value)
    {       
        $method = '_set' . ucfirst($name);
        
        if (method_exists($this, $method)) {
            $this->{$method}($value);
        } else if (in_array($name, $this->_fields)) {
            $this->_values[$name] = $value;
        } else {
            throw new App_Model_OutOfBoundsException('Field with name ' . $name . ' does not exist');
        }
    }
    
    /**
     * Get a field
     *
     * @param  string $name
     * @throws App_Model_OutOfBoundsException When field does not exist
     * @return mixed
     */
    public function __get($name)
    {
        $method = '_get' . ucfirst($name);
        
        if (method_exists($this, $method)) {
            return $this->{$method}();
        } else if (in_array($name, $this->_fields)) {
            if (!array_key_exists($name, $this->_values)) {
                throw new App_Model_RuntimeException('Trying to accessing field ' . $name . ' which value was not set yet');
            }

            return $this->_values[$name];
        } else {
            throw new App_Model_OutOfBoundsException('Field with name ' . $name . ' does not exist');
        }
    }
}