jced-artem/lazy-loading

Quick simple lazy loading trait using reference property and closure

1.0.1 2016-12-15 22:55 UTC

Requires

• php: >=5.5.0

MIT

• Artem Jced

• pattern
• trait
• lazy loading

README

Quick simple lazy loading trait using reference property and closure

You do not need anymore to write something similar to implement lazy loading:

class ObjectFactory
{
    private $object;
    
    public function getObject()
    {
        if (empty($object)) {
            $this->object = new stdClass();
        }
        return $this->object;
    }
}

And, actually, you also do not need to keep in mind where you need to use empty(), is_null() or $x === false!

Just use LazyTrait:

class ObjectFactory
{
    use \Jced\LazyTrait;
    
    private $object1;
    private $object2;
    private $object3;
    private $object4;
    private $object5;
    
    public function getObject1()
    {
        // assert empty by default
        return $this->lazy($this->object1, new stdClass());
    }
    
    public function getObject2()
    {
        // assert empty by default
        return $this->lazy($this->object2, function() {
            return new stdClass();
        });
    }
    
    public function getObject3()
    {
        // assert is_null
        return $this->lazy($this->object3, new stdClass(), false, true);
    }
    
    public function getObject4()
    {
        // assert is false
        return $this->lazy($this->object4, new stdClass(), false, false, true);
    }
    
    public function getObject5()
    {
        // assert is false or empty or is_null
        return $this->lazy($this->object5, new stdClass(), true, true, true);
    }
}

Install

composer require jced-artem/lazy-loading

Notice

Note that if you pass object as 'return' param - you will get reference. Use new or clone to prevent it if you need.