gistfile1.txt

public with sharing class DuesCalculator {

  public DuesCalculator() {

	}

  public Decimal getAnnualDues(Id contactId) {
    return 1;
  }

  public Decimal getLifetimeDues(Id contactId) {
    return 1;
  }

  public List<Account> getAccountHierarchy(Id accountId, List<Account> accounts) {
    Account a = [
      select Id, ParentId, Name, Type
      from Account
      where Id = :accountId
    ];
    if (accounts == null) {
      accounts = new List<Account>();
    }
    accounts.add(a);
    if (a.Parent != null) {
      return this.getAccountHierarchy(a.ParentId, accounts);
    } else {
      return accounts;
    }
  }

}