Where do you put your dependencies?

Posted by The All Foo on Stack Overflow See other posts from Stack Overflow or by The All Foo
Published on 2012-04-14T22:19:59Z Indexed on 2012/04/14 23:30 UTC
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If I use the dependency injection pattern to remove dependencies they end up some where else.

For example, Snippet 1, or what I call Object Maker.

I mean you have to instantiate your objects somewhere...so when you move dependency out of one object, you end up putting it another one.

I see that this consolidates all my dependencies into one object. Is that the point, to reduce your dependencies so that they all reside in a single ( as close to as possible ) location?

Snippet 1 - Object Maker

<?php

class ObjectMaker
{
    public function makeSignUp()
    {
        $DatabaseObject = new Database();
        $TextObject = new Text();
        $MessageObject = new Message();

        $SignUpObject = new ControlSignUp();        
        $SignUpObject->setObjects($DatabaseObject, $TextObject, $MessageObject);
        return $SignUpObject;
    }
    public function makeSignIn()
    {
        $DatabaseObject = new Database();
        $TextObject = new Text();
        $MessageObject = new Message();

        $SignInObject = new ControlSignIn();
        $SignInObject->setObjects($DatabaseObject, $TextObject, $MessageObject);
        return $SignInObject;
    }
    public function makeTweet( $DatabaseObject = NULL, $TextObject = NULL, $MessageObject = NULL )
    {
        if( $DatabaseObject == 'small' )
        {
            $DatabaseObject = new Database();
        }
        else if( $DatabaseObject == NULL )
        {
            $DatabaseObject = new Database();
            $TextObject = new Text();
            $MessageObject = new Message();
        }
        $TweetObject = new ControlTweet();        
        $TweetObject->setObjects($DatabaseObject, $TextObject, $MessageObject);
        return $TweetObject;
    }
    public function makeBookmark( $DatabaseObject = NULL, $TextObject = NULL, $MessageObject = NULL )
    {
        if( $DatabaseObject == 'small' )
        {
            $DatabaseObject = new Database();
        }
        else if( $DatabaseObject == NULL )
        {
            $DatabaseObject = new Database();
            $TextObject = new Text();
            $MessageObject = new Message();
        }

        $BookmarkObject = new ControlBookmark();        
        $BookmarkObject->setObjects($DatabaseObject,$TextObject,$MessageObject);
        return $BookmarkObject;
    }
}

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