Category: strategy

This post is part of the series – Design Pattern in ApexThe strategy design pattern is the one which allows an algorithm’s behavior to be chosen at run time. It is used to define a set of algorithms to solve a common problem. It allows unique logic per algorithm via encapsulations, but ensures that all algorithms are interchangeable at run time. Here the abstraction is achieved by an interface, whereas individual implementations are done at derived classes. So basically it looks like -Where I should use this design pattern?This design pattern should be used when you are planning to perform an operation that has a common end goal, but there can be different approaches/ways to achieve that goal. All these approaches can be chosen by client at run-time.Let me tell you few real-life Salesforce based example where this design pattern can be used -Let’s say in the account detail page, you want to display the current temperature of the city where the office located. Now based on the country/state, you may need to collect the temperature information from different websites, but your final goal is always the same i.e. showing the temperature.Let’s say you are calculating discounts per product based on month. Every month, the discount amount is getting calculated by different complex algorithms/formulas. Here also, your final goal is same i.e. calculating the discounts.Let’s say you want to set...