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| By Inverting the ownership we have inverted the dependancy and satisfied the DIP. Let's see the new UML. | |
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| Here I changed the interface name to SwitchableInterface to clearly show that Ownership lies with Switch. And change in interface will happen only when policy changes. | |
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| Yes I got it ! So change will happen when client wants and it will not be forced by implementation classes Like Fan Now. | |
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