Simple Trigger Framework Insert Validation Handler Example

gistfile1.txt

public with sharing class AccountTriggerHandler extends TriggerHandlerBase {
    protected override void beforeInsert(List<Sobject> newRecords) {
        List<Account> newAccounts = (List<Account>) newRecords;
        for (Account newAcct : Trigger.new) {
            if (newAcct.Name == ‘bad’)
                newAcct.addError(‘Bad Name’);
        }
    }
}