package data.stdforms.twotableformsheet; import sale.*; import data.*; import data.stdforms.*; import users.*; /** * MoveStrategy for a Catalog source and a DataBasket destination. * * @author Steffen Zschaler * @version 2.0 20/08/1999 * @since v2.0 */ public class CDBStrategy extends MoveStrategy { /** * Get the sub-process that will move items from the source to the destination. * * @param p the process into which the sub-process wil be embedded. * @param sp the SalesPoint, if any, at which the FormSheet is being displayed. * @param cSource the source Catalog. * @param dbDest the destination DataBasket. * @param ci the CatalogItem that is selected in the source. * @param ttfs the FormSheet that triggers the process. * * @override Never */ public Transition getMoveToDestProcess (SaleProcess p, SalesPoint sp, Catalog cSource, DataBasket dbDest, CatalogItem ci, TwoTableFormSheet ttfs) { return new GateChangeTransition (getCheckMoveToDestGate (p, sp, cSource, dbDest, ci, ttfs)); } /** * Get the first gate of the sub-process that will move items from the source to the destination. * * <p>This Gate will check whether the move is allowable, and if so, will trigger a Transition that * performs it.</p> * * @param p the process into which the sub-process wil be embedded. * @param sp the SalesPoint, if any, at which the FormSheet is being displayed. * @param cSource the source Catalog. * @param dbDest the destination DataBasket. * @param ci the CatalogItem that is selected in the source. * @param ttfs the FormSheet that triggers the process. * * @override Never Instead, override {@link #checkMoveToDest} and/or {@link #moveToDest}. */ protected Gate getCheckMoveToDestGate (SaleProcess p, final SalesPoint sp, final Catalog cSource, final DataBasket dbDest, final CatalogItem ci, final TwoTableFormSheet ttfs) { return new Gate() { public Transition getNextTransition (SaleProcess p, User u) throws InterruptedException { int nCheckReturn = checkMoveToDest (p, sp, cSource, dbDest, ci); if (nCheckReturn == 0) { return new Transition() { public Gate perform (SaleProcess p, User u) { moveToDest (p, sp, cSource, dbDest, ci); return ttfs.getGate(); } }; } else { error (p, nCheckReturn); return new GateChangeTransition (ttfs.getGate()); } } }; } /** * Check whether the indicated move is allowable. If so, return 0, otherwise return a non-zero error value * that can be passed on to {@link sale.stdforms.FormSheetStrategy#error}. You can assume that you are at a {@link Gate}. * * @param p the process into which the sub-process wil be embedded. * @param sp the SalesPoint, if any, at which the FormSheet is being displayed. * @param cSource the source Catalog. * @param dbDest the destination DataBasket. * @param ci the CatalogItem that is selected in the source. * * @override Sometimes The default implementation returns 0. */ protected int checkMoveToDest (SaleProcess p, SalesPoint sp, Catalog cSource, DataBasket dbDest, CatalogItem ci) throws InterruptedException { return 0; } /** * Move the indicated item from source to destination. You can assume that you are in a {@link Transition}. * * @param p the process into which the sub-process wil be embedded. * @param sp the SalesPoint, if any, at which the FormSheet is being displayed. * @param cSource the source Catalog. * @param dbDest the destination DataBasket. * @param ci the CatalogItem that is selected in the source. * * @override Sometimes */ protected void moveToDest (SaleProcess p, SalesPoint sp, Catalog cSource, DataBasket dbDest, CatalogItem ci) { try { cSource.remove (ci, dbDest); } catch (DataBasketConflictException dbce) { error (p, DATABASKET_CONFLICT_ERROR); } catch (data.events.VetoException ve) { error (p, REMOVE_VETO_EXCEPTION); } } /** * Get the sub-process that will move items from the destination to the source. * * @param p the process into which the sub-process wil be embedded. * @param sp the SalesPoint, if any, at which the FormSheet is being displayed. * @param cSource the source Catalog. * @param dbDest the destination DataBasket. * @param ci the CatalogItem that is selected in the destination. * @param ttfs the FormSheet that triggers the process. * * @override Never */ public Transition getMoveToSourceProcess (SaleProcess p, SalesPoint sp, Catalog cSource, DataBasket dbDest, CatalogItem ci, TwoTableFormSheet ttfs) { return new GateChangeTransition (getCheckMoveToSourceGate (p, sp, cSource, dbDest, ci, ttfs)); } /** * Get the first gate of the sub-process that will move items from the destination to the source. * * <p>This Gate will check whether the move is allowable, and if so, will trigger a Transition that * performs it.</p> * * @param p the process into which the sub-process wil be embedded. * @param sp the SalesPoint, if any, at which the FormSheet is being displayed. * @param cSource the source Catalog. * @param dbDest the destination DataBasket. * @param ci the CatalogItem that is selected in the destination. * @param ttfs the FormSheet that triggers the process. * * @override Never Instead, override {@link #checkMoveToSource} and/or {@link #moveToSource}. */ protected Gate getCheckMoveToSourceGate (SaleProcess p, final SalesPoint sp, final Catalog cSource, final DataBasket dbDest, final CatalogItem ci, final TwoTableFormSheet ttfs) { return new Gate() { public Transition getNextTransition (SaleProcess p, User u) throws InterruptedException { int nCheckReturn = checkMoveToSource (p, sp, cSource, dbDest, ci); if (nCheckReturn == 0) { return new Transition() { public Gate perform (SaleProcess p, User u) { moveToSource (p, sp, cSource, dbDest, ci); return ttfs.getGate(); } }; } else { error (p, nCheckReturn); return new GateChangeTransition (ttfs.getGate()); } } }; } /** * Check whether the indicated move is allowable. If so, return 0, otherwise return a non-zero error value * that can be passed on to {@link sale.stdforms.FormSheetStrategy#error}. You can assume that you are at a {@link Gate}. * * @param p the process into which the sub-process wil be embedded. * @param sp the SalesPoint, if any, at which the FormSheet is being displayed. * @param cSource the source Catalog. * @param dbDest the destination DataBasket. * @param ci the CatalogItem that is selected in the destination. * * @override Sometimes The default implementation returns * {@link ProcessErrorCodes#NOT_ENOUGH_ELEMENTS_ERROR} if the destination DataBasket contains no entry that * describes the given CatalogItem. */ protected int checkMoveToSource (SaleProcess p, SalesPoint sp, Catalog cSource, DataBasket dbDest, CatalogItem ci) throws InterruptedException { if (!dbDest.contains (DataBasketConditionImpl.specificCatalogItem (ci))) { return NOT_ENOUGH_ELEMENTS_ERROR; } else { return 0; } } /** * Move the indicated item from the destination to the source. You can assume that you are in a * {@link Transition}. * * @param p the process into which the sub-process wil be embedded. * @param sp the SalesPoint, if any, at which the FormSheet is being displayed. * @param cSource the source Catalog. * @param dbDest the destination DataBasket. * @param ci the CatalogItem that is selected in the destination. * * @override Sometimes */ protected void moveToSource (SaleProcess p, SalesPoint sp, Catalog cSource, DataBasket dbDest, CatalogItem ci) { try { cSource.add (ci, dbDest); } catch (DuplicateKeyException dke) { error (p, DUPLICATE_KEY_EXCEPTION); } catch (DataBasketConflictException dbce) { error (p, DATABASKET_CONFLICT_ERROR); } } }