Domain\Identity\StringIdentity

Complexity

Total Complexity

8

Size/Duplication

Total Lines	57
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	0

Importance

Changes	2
Bugs	0	Features	0

5 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	5	1
A	fromString()	0	4	1
A	__toString()	0	4	1
A	equals()	0	4	2
A	guardString()	0	6	3

<?php

namespace Domain\Identity;

/**
 * @author Sebastiaan Hilbers <bashilbers@gmail.com>
 */
abstract class StringIdentity implements Identity
{
    /**
     * @var string
     */
    private $string;

    public function __construct($string)
    {
        self::guardString($string);
        $this->string = $string;
    }

    /**
     * Creates an identifier object from a string representation
     *
     * @param $string
     * @return static
     */
    public static function fromString($string)
    {
        return new static($string);
    }

    /**
     * Returns a string that can be parsed by fromString()
     *
     * @return string
     */
    public function __toString()
    {
        return (string) $this->string;
    }

    /**
     * Compares the object to another IdentifiesAggregate object. Returns true if both have the same type and value.
     *
     * @param Identity $other
     * @return boolean
     */
    public function equals(Identity $other)
    {
        return $other instanceof static && $this->string == $other->string;
    }

    /**
     * Make sure that the input is in fact a string
     *
     * @param $string
     */
    private static function guardString($string)
    {
        if (!is_string($string) || empty($string)) {
            throw new \InvalidArgumentException("String expected");
        }
    }
}