Apply Domain Layer Principles in Apex

Apply Domain Layer Principles in Apex(task-2)
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Apex class name: Accounts


code:
public class Accounts extends fflib_SObjectDomain {

public Accounts(List<Account> sObjectList) {
        super(sObjectList);
    }
public class Constructor implements fflib_SObjectDomain.IConstructable {
    public fflib_SObjectDomain construct(List<SObject> sObjectList) {
         return new Accounts(sObjectList);
    }
}
public override void onApplyDefaults() {
    for(Account account: (List<Account>) Records) {
        account.Description = 'Domain classes rock!';
    }
}
public override void onBeforeUpdate(Map<Id,SObject> existingRecords) {
        for(Account account : (List<Account>) Records) {
                account.AnnualRevenue = (account.Description).getLevenshteinDistance('Domain classes rock!');
            }
     }
}


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Apextrigger name : AccountsTrigger



code:
trigger AccountsTrigger on Account (after delete, after insert, after update, before delete, before insert, before update) {
	fflib_SObjectDomain.triggerHandler(Accounts.class);
}