How to use

PlanChangeResult

in

com.ning.billing.catalog.api

@Test(groups = "fast")
public void testExistingPriceListIsKept() throws CatalogApiException {
  final DefaultProduct product1 = cat.getCurrentProducts()[0];
  final DefaultPriceList priceList1 = cat.findCurrentPriceList(PriceListSet.DEFAULT_PRICELIST_NAME);
  final PlanPhaseSpecifier from = new PlanPhaseSpecifier(product1.getName(), product1.getCategory(), BillingPeriod.MONTHLY, priceList1.getName(), PhaseType.EVERGREEN);
  final PlanSpecifier to = new PlanSpecifier(product1.getName(), product1.getCategory(), BillingPeriod.ANNUAL, priceList1.getName());
  PlanChangeResult result = null;
  try {
    result = cat.getPlanRules().planChange(from, to, cat);
  } catch (IllegalPlanChange e) {
    Assert.fail("We should not have triggered this error");
  } catch (CatalogApiException e) {
    Assert.fail("", e);
  }
  Assert.assertEquals(result.getPolicy(), BillingActionPolicy.END_OF_TERM);
  Assert.assertEquals(result.getAlignment(), PlanAlignmentChange.START_OF_SUBSCRIPTION);
  Assert.assertEquals(result.getNewPriceList(), priceList1);
}

public PlanChangeResult planChange(final PlanPhaseSpecifier from, PlanSpecifier to, final StandaloneCatalog catalog) throws CatalogApiException {
  final DefaultPriceList toPriceList;
  if (to.getPriceListName() == null) { // Pricelist may be null because it is unspecified this is the principal use-case
    toPriceList = findPriceList(from.toPlanSpecifier(), catalog);
    to = new PlanSpecifier(to.getProductName(), to.getProductCategory(), to.getBillingPeriod(), toPriceList.getName());
  } else {
    toPriceList = catalog.findCurrentPriceList(to.getPriceListName());
  }
  final BillingActionPolicy policy = getPlanChangePolicy(from, to, catalog);
  if (policy == BillingActionPolicy.ILLEGAL) {
    throw new IllegalPlanChange(from, to);
  }
  final PlanAlignmentChange alignment = getPlanChangeAlignment(from, to, catalog);
  return new PlanChangeResult(toPriceList, policy, alignment);
}

  @Test(groups = "fast")
  public void testBaseCase() throws CatalogApiException {
    final DefaultProduct product1 = cat.getCurrentProducts()[0];
    final DefaultProduct product2 = cat.getCurrentProducts()[1];
    final DefaultPriceList priceList1 = cat.findCurrentPriceList(PriceListSet.DEFAULT_PRICELIST_NAME);
    final DefaultPriceList priceList2 = cat.getPriceLists().getChildPriceLists()[0];

    final PlanPhaseSpecifier from = new PlanPhaseSpecifier(product1.getName(), product1.getCategory(), BillingPeriod.MONTHLY, priceList1.getName(), PhaseType.EVERGREEN);
    final PlanSpecifier to = new PlanSpecifier(product2.getName(), product2.getCategory(), BillingPeriod.MONTHLY, null);

    PlanChangeResult result = null;
    try {
      result = cat.getPlanRules().planChange(from, to, cat);
    } catch (IllegalPlanChange e) {
      Assert.fail("We should not have triggered this error");
    } catch (CatalogApiException e) {
      Assert.fail("", e);
    }

    Assert.assertEquals(result.getPolicy(), BillingActionPolicy.END_OF_TERM);
    Assert.assertEquals(result.getAlignment(), PlanAlignmentChange.START_OF_SUBSCRIPTION);
    Assert.assertEquals(result.getNewPriceList(), priceList2);
  }
}